СПОСОБ И УСТРОЙСТВО ДЕТЕКТИРОВАНИЯ ТЕЧЕНИЯ ЖИДКОСТИ

Способ и устройство детектирования течения жидкости, в частности воды, в потребляющей установке, содержащей по меньшей мере одно средство (3) открытия/закрытия для подачи жидкости, причем эта установка запитывается через входной трубопровод (2), оборудованный электроклапаном (5), датчиком (6) давления, размещенным перед электроклапаном, и датчиком (7) давления, размещенным за электроклапаном. Средства (8) управления выполнены с возможностью осуществлять следующие операции: вычисление разности (ΔР) между величиной сигнала давления (Pam) на входе и величиной сигнала давления (Pav) на выходе, сравнение этой разности (ΔР) с по меньшей мере одним порогом срабатывания (SΔPo, SΔPf); причем когда упомянутая разность (ΔР) давлений становится равной или превышающей порог (SΔPo) срабатывания, вырабатывается управляющий сигнал (Со) на открытие электроклапана (5); когда разность (ΔР) давлений становится равной или меньшей порога (SΔPf) срабатывания, вырабатывается управляющий сигнал (Cf) на закрытие ...

Method for Autonomous Control of a Chemical Injection System for Oil and Gas Wells

A method for injecting/dispensing a liquid phase chemical into a well, comprises steps of: Inputting a certain desired fluid flow rate; Timing the period required to dispense a known volume of fluid; Computing an average fluid flow rate during the timed period; Comparing the average flow rate to the desired flow rate; Adjusting the size of a variable orifice to minimize the difference between the compared flow rates. Preferably, method measures the time required for the travel of a free piston 22 in a cylinder of known volume to determine an average flow rate during a full stroke of the piston. The method may also measure and record the inlet and outlet pressures 49, 49' or the differential pressure between the fluid inlet and outlet. Preferably, a four-way valve 16 which functions as an adjustable metering orifice, in response to the measured average flow rate and/or changes in the inlet and outlet pressures to achieve the desired flow rate. At the end of each stroke, the four-way valve ...

PIPELINE BREAK SHUTOFF CONTROL

... 1348223 Fluid-pressure servomotor systems H J SHAFER 3 May 1972 [15 Oct 1971] 20601/72 Heading G3P A main valve 10 in a pipeline 11, 12 is closed in response to a predetermined pressure drop by an element 41 connected across an orifice 51 through which fluid escapes from a storage tank 53 to the low pressure section 12 of the pipeline after the pressure drop has operated shuttle valves 22, 23. The element is displaced against a spring loaded detent 63 to operate a lever 32 and a valve 28 to connect the high pressure section 11 of the pipeline and a storage tank A to a line 30 to force oil from a cylinder 35 into a rotary motor 13 to close the valve 10. Oil expelled from the motor is collected in a cylinder 35' connected to an exhaust line 31' through a valve 28' and a line 30' . To re-open the valve 10, the valve 28' is actuated by the lever 32. The element 41 may be a piston or a diaphragm with shafts 45, 46 of different diameters to make the sensitivity of the control independent of changes ...

ORIFICE PLATE ARRANGEMENT FOR A HYDRAULIC CURRENT PARTIAL AND CURRENT SUMMING UP EQUIPMENT

SHUT-OFF PROTECTION IN PIPINGS

CONTROL SYSTEM FOR SUPPLYING A GAS FLOW TO A GAS CONSUMPTION APPARATUS

DEVICE AND PROCEDURE FOR THE MEASUREMENT AND REGULATION OF A GAS FLOW WITH VARIABLE VOLUME.

SHUT-OFF PROTECTION IN PIPINGS

METHOD AND DEVICE FOR THE REGULATION OF THE PRESSURE OF A FLUID

DIGITAL FLUID FLOW RATE MEASUREMENT OR CONTROL SYSTEM

A plurality of individually actuatable, value weighted digital bistable valve elements in parallel interconnect a fluid source to a fluid receiver. A linear relationship is preferably maintained between the resultant fluid flow rate from the source to the receiver and the product of a flow rate determinative fluid parameter times the sum of the weighted values of the digital valve elements in the open state. The fluid parameter is sensed, the states of the digital valve elements are controlled, responsive, and a flow rate representative signal is derived from the states of the valve elements and the fluid parameter. If the fluid is liquid, the parameter is the square root of the pressure difference across the valve elements, in the absence of cavitating venturis, and is the square root of the difference between the upstream pressure and the vapor pressure of the liquid in the presence of cavitating venturis. If the fluid is gas, the parameter is the source pressure divided by the square ...

GAS PRESSURE REGULATING VALVE

Provided is a pressure-regulating valve for gas, which, even in a high pressure fuel gas environment, is capable of adjusting the secondary pressure of said environment to a target pressure with greater accuracy, and which can also prevent the leakage of fuel gas to the atmosphere. An electromagnetic pressure-regulating valve (1) is provided with a valve body (14), and adjusts a secondary pressure (p2) to a target pressure by moving the valve body (14) by means of an electromagnetic proportional solenoid (27) and adjusting the opening degree of a valve passage (13). A pressure feedback chamber (24) is formed in a housing (12), and a diaphragm seal (19) is provided in the valve body (14). The diaphragm seal (19) receives the secondary pressure (p2) of the pressure feedback chamber (24), and moves the valve body (14) to a closed position. A bearing member (18) is provided between the valve body (14) and the housing (12), a high pressure seal member (20) is provided in the same gap, further ...

Pressure Reduction and Flow Regulation Device

DEVICE FOR THE REGULAR VENTILATION OF RAEUMEN.

HYDRAULIC SUPPLY SYSTEMS WITH FLOW RATE LIMITING CONTROL

PROCESS AND DEVICE OF AUTOMATIC STARTUP OF the OTHER HEADS Of SPRINKLING Of an INSTALLATION OF FIRE-PROTECTION AFTER RELEASE Of AT LEAST OF THE AFORESAID HEADS

질량 유량 컨트롤러 및 유체 유형에 걸쳐 개선된 성능을 위한 방법

... 다양한 유체 유형의 유량의 제어를 개선하기 위한 시스템 및 방법이 기술된다. 이 방법은 제어될 공정 가스에 대한 공정 가스 유형을 선택하는 단계와 선택된 공정 가스 유형에 대한 분자 질량 정보를 얻는 단계를 포함한다. 복수의 유량 및 압력 값 쌍 각각에 대해, 대응하는 제어 신호 값을 포함하는 일반 특성화 데이터가 얻어지고, 수학식 Fadj = Fcal * (Mcal/Mpr)k에 따라 일반 특성화 데이터 내의 유량 값들을 수정함으로써 작동 특성화 데이터가 생성되며, 여기서 Fadj는 조절된 유량 값이고, Fcal은 보정된 유량 값이며, Mpr은 선택된 공정 가스 유형에 대한 분자 질량이고, Mcal은 보정 가스에 대한 분자 질량이다. 작동 특성화 데이터는 이어서 질량 유량 컨트롤러의 밸브를 개루프 제어 모드로 작동시키기 위해 사용된다.

método para controle autônomo de um sistema de injeção química para poços de petróleo e de gás

Control valve device

To provide a control valve device wherein the accuracy in opening and closing of a valve is improved. The control valve device 300 has a valve body 310 having a valve body head 310a, a power transmission member 320a for transmitting power to the valve body, a valve box 305 in which the valve body is slidably stored, a first bellows 320b which defines a first space Us at a position on the opposite side of the power transmission member to the valve body, a second bellows 320c which defines a second space Ls at a position on the side of the power transmission member to the valve body, a first pipe 320d which communicates with the first space, and a second pipe 320e which communicates with the second space. Power is transmitted from the power transmission member to the valve body in accordance with the pressure ratio of working fluid supplied to the first space and the second space, so that the valve body head opens and closes a transfer path formed in the valve box. The valve body head has ...

Alternative Pressure Control for a Low Constant Pressure Injection Molding Apparatus

A low constant pressure injection molding machine forms molded parts by injecting molten thermoplastic material into a mold cavity at low constant pressures of 6,000 psi and lower. As a result, the low constant pressure injection molding machine includes a mold formed of easily machineable material that is less costly and faster to manufacture than typical injection molds.

Adjustable restriction muffler system for a combine

A bypass for an exhaust system for a utility vehicle, such as a combine, that, when substantially closed, provides maximum noise attenuation for road transport, i.e., relatively high back pressure, and then, when substantially open, would provide a reduced flow restriction, i.e., relatively low back pressure, for full power, field operation. A bypass flow path in an exhaust pipe is located upstream of a primary muffler. A diaphragm can be provided to manipulate a damper which acts to close the exhaust flow to the primary muffler and open the bypass to an exhaust pipe to effectively bypass the primary muffler.

Axially aligned rotationally adjustable flow control valve

A rotationally adjustable valve is disclosed whereby the user is able to control the flow of fluids from complete shutoff to maximum flow by rotating the adjustment means of the valve, said rotation being axial to the flow of the fluid. Additionally, the user is able to attach high and low pressure test probes directly to the valve, as it is rotatably adjusted, so that additional equipment is not required next to the valve. An embodiment of this invention includes the use of an adjustable Cv disk to set the maximum flow of the valve, rather than just create a simple 180° on/off, very similar to a current 90° ball valve that this device will replace.

СИСТЕМА И СПОСОБ ИЗМЕРЕНИЯ РАСХОДА ТЕКУЧЕЙ СРЕДЫ, ИСПОЛЬЗУЕМОЙ ДЛЯ УПРАВЛЕНИЯ ПРОЦЕССОМ

Изобретение относится к измерению потребления (расхода) текучей среды оборудованием для управления процессом и, более конкретно, к определению количества питающей текучей среды, расходуемой конкретными приборами в составе системы управления или всей цепью управления процессом. Система измерения количества питающей текучей среды, потребленной устройством управления процессом в составе системы управления процессом, содержит систему управления процессом, источник питающей текучей среды, управляемый источник текучей среды в виде резервуара, регулятор давления, первый и второй измерительные преобразователи/датчики давления, первый, второй и третий селективно активируемые солоноидные клапаны. Система управления процессом содержит контроллер и, по меньшей мере, одно устройство управления процессом. Управляемый источник текучей среды имеет известный и постоянный объем, который содержит газ при заданном давлении и функционально связанный с входом указанного контроллера. Первый измерительный преобразователь ...

СПОСОБ И УСТРОЙСТВО ДЕТЕКТИРОВАНИЯ ТЕЧЕНИЯ ЖИДКОСТИ

... 1. Способ детектирования течения жидкости, в частности воды в потребляющей установке, содержащей по меньшей мере одно средство (3) открытия/закрытия для подачи жидкости, причем эту установку запитывают жидкостью через входной трубопровод (2), оборудованный электроклапаном (5), датчиком (6) давления, размещенным перед электроклапаном, выполненным с возможностью выдавать сигнал давления (Pam) на входе, и датчиком (7) давления, размещенным за электроклапаном, выполненным с возможностью выдавать сигнал давления (Pav) на выходе, причем этот способ включает:- вычисление разности (ΔP) между величиной сигнала давления (Pam) на входе и величиной сигнала давления (Pav) на выходе- и сравнение этой разности (ΔP) с по меньшей мере одним порогом срабатывания (SΔPo, SΔPf),и способ, в соответствии с которым:- когда упомянутая разность (ΔP) давления становится равной или превышающей порог (SΔPo) срабатывания, вырабатывают управляющий сигнал (Co) на открытие электроклапана (5);- когда упомянутая разность ...

Pneumatischer Regler zum Regeln der Zufuhr von Gas in einem Raum

Steuerungssystem zum Zuführen eines Gasstromes zu einem Gasverbrauchsapparat

WATER SUPPLY PRESSURE CONTROL APPARATUS

Method for Autonomous Controls of a Chemical Injection System for Oil and Gas Wells

FLUID PRESSURE VALVE ASSEMBLIES

... 1406322 Fluid-pressure servomotor systems GARRETT CORP 6 Oct 1972 [7 Oct 1971] 46262/72 Heading G3P A fluid-pressure servomotor system comprises a main valve 14 actuated by the difference in pressure between the top surface 20 of a diaphragm 22 and the bottom surface of a piston 24 in order to keep the pressure downstream of the valve within a predetermined range. Fluid-pressure upstream of the valve is used as a source of pressure for the actuator 16 and is admitted after actuation of a solenoid valve 34 to the chamber 18 above the diaphragm via a pair of check-valves 53, 54. Besides chamber 19, pressure downstream is applied to a pair of regulating valves 43, 47. When the valve 34 is in the position shown, the spring 30 in the actuator exhausts chamber 18 by raising the diaphragm and the fluid lifts the checkvalves off their seats exhausting rapidly through outlet 38 in the valve 34. The main valve quickly shuts under these conditions. When the solenoid valve is actuated fluid-pressure ...

Mechanism for the supply of the burner of a vehicle heater with liquid fuel

RELIEF VALVE

SPRINKLER SYSTEM

SYSTEM, METHOD, AND APPARATUS FOR MONITORING RESTROOM APPLIANCES

A system for monitoring flush valves is provided, including a plurality of flush valves arranged in at least one restroom of a building, each flush valve of the plurality of flush valves including a communication device configured to transmit flush valve data, and at least one controller in communication with each flush valve of the plurality of flush valves. The at least one controller is programmed or configured to receive the flush valve data from each flush valve of the plurality of flush valves and determine if a first flush valve of the plurality of flush valves is in need of servicing or replacement based at least partially by comparing flush valve data for the first flush with flush valve data for at least one other flush valve of the plurality of flush valves. A method and apparatus are also disclosed.

SYSTEM, METHOD, AND APPARATUS FOR MONITORING RESTROOM APPLIANCES

A system for monitoring flush valves is provided, including a plurality of flush valves arranged in at least one restroom of a building, each flush valve of the plurality of flush valves including a communication device configured to transmit flush valve data, and at least one controller in communication with each flush valve of the plurality of flush valves. The at least one controller is programmed or configured to receive the flush valve data from each flush valve of the plurality of flush valves and determine if a first flush valve of the plurality of flush valves is in need of servicing or replacement based at least partially by comparing flush valve data for the first flush with flush valve data for at least one other flush valve of the plurality of flush valves. A method and apparatus are also disclosed.

SYSTEM AND METHOD FOR A DIAPHRAGM VALVE CONTROLLED THROUGH MEASUREMENT OF WATER PRESSURE AND SOLENOID OPENING TIME

A flush valve system is provided having an inlet and an outlet, and a main valve element adapted for transition between a closed position and an open position is disclosed. The flush valve further includes a control chamber in communication with the inlet, and a vent outlet in communication with the outlet. The system includes a solenoid for establishing communication between the control chamber and the vent outlet to establish a pressure differential across a portion of the main valve element. The system also includes a power supply for energizing the solenoid, a deployable actuator in communication with the power supply, and a microprocessor in electrical communication with the main valve element. The microprocessor is adapted to determine a valve opening time, calculate fluid pressure based on the valve opening time, and deliver a predetermined quantity of fluid through the valve based on fluid pressure.

ALTERNATIVE PRESSURE CONTROL FOR A LOW CONSTANT PRESSURE INJECTION MOLDING APPARATUS

A melt pressure regulating mechanism for an injection molding apparatus having a melt holder for pressurizing molten plastic prior to injection into a mold, the molten plastic having a melt pressure, and an injection element for advancing the molten plastic from the melt holder into the mold, the melt pressure regulating mechanism comprising: a pressure regulating device disposed between the melt holder and the mold, the pressure regulating device maintaining a substantially constant melt pressure within a mold cavity, the pressure regulating device comprising one of a fluid pressure regulating valve and a pressure relief valve. The injection molding machine forms molded parts by injecting molten thermoplastic material into a mold cavity at low constant pressures of 6,000 psi and lower.

PNEUMATIC VARIABLE AIR VOLUME CONTROLLER

PNEUMATIC VARIABLE AIR VOLUME CONTROLLER In a pneumatic variable air volume controller, a linear relationship is achieved between the actual air velocity in a duct carrying conditioned air to a defined area and a pneumatic pressure signal representing the temperature in that area; and this linear relationship is used to vary the volume of air flowing in the duct. This is achieved by comparing a pneumatic pressure control signal which is a linear representation of the velocity pressure in the duct to a pneumatic pressure control signal which varies as the square of a thermostat pneumatic pressure signal which itself varies in a linear manner with respect to the temperature in the controlled area.

PROCESS AND DEVICE OF AUTOMATIC STARTUP OF the OTHER HEADS Of SPRINKLING Of an INSTALLATION OF FIRE-PROTECTION AFTER RELEASE Of AT LEAST OF THE AFORESAID HEADS

VALVES

Flammable gas e.g. hydrogen, container and fixed installation connecting device, has container with shut-off valve having rapid connection with end of secondary tube that is coupled to main tube in order to extend along part of main tube

La sortie haute pression (2) du réservoir donneur est reliée à l'installation utilisatrice (11) par une tubulure principale de transfert (4) via une vanne pilotée (5) commandée par une ligne auxiliaire (6) reliée (12) à un circuit auxiliaire de l'installation (11) et s'étendant le long de la tubulure principale (15) en étant solidarisée à cette dernière, avec une longueur raccourcie, en plusieurs points distants (Si). Ainsi, toute rupture ou fuite inflammable de la tubulure (4) provoque un arrachement ou une fusion de la ligne auxiliaire (6) provoquant la fermeture immédiate de la vanne de sortie (5). Application notamment à la fourniture de gaz inflammable à des installations fixes.

PROCESS AND DEVICE OF DETECTION Of FLOW Of a LIQUID

Pressure based mass flow controller

A mass flow controller (MFC) has a standard envelope with an enclosure and a corresponding base. A pressure transducer is communicatively coupled to a process gas in a proportional inlet valve without being physically coupled to the base. The space formerly occupied by the pressure transducer is available for additional component integration, or reduction of the standard envelope size. A second pressure transducer is located remotely and shared by multiple MFCs. A relief valve can quickly relieve a P1 pressure of a P1 volume of process gas. A first laminar flow element (LFE) and a second LFE and in series high conductance valve configured in parallel to produce a wide-range MFC that maintains accuracy.

System, method, and apparatus for optimizing a timing of a flush valve

A system for optimizing a timing of a flush valve is provided. The system includes a flush valve comprising a flow area and a solenoid configured to open the flush valve, at least one pressure sensor configured to measure a pressure in the flush valve, and at least one controller in communication with the at least one pressure sensor and the solenoid. The at least one controller is programmed or configured to control the solenoid to open the flush valve for a flush time in response to a flush request, measure a pressure in the flush valve to obtain at least one flush valve pressure, adjust the flush time based at least partially on the at least one flush valve pressure, resulting in an adjusted flush time, and control the solenoid to open the flush valve for the adjusted flush time in response to a flush request.

System, Method, and Apparatus for Optimizing a Timing of a Flush Valve

A system for optimizing a timing of a flush valve is provided. The system includes a flush valve comprising a flow area and a solenoid configured to open the flush valve, at least one pressure sensor configured to measure a pressure in the flush valve, and at least one controller in communication with the at least one pressure sensor and the solenoid. The at least one controller is programmed or configured to control the solenoid to open the flush valve for a flush time in response to a flush request, measure a pressure in the flush valve to obtain at least one flush valve pressure, adjust the flush time based at least partially on the at least one flush valve pressure, resulting in an adjusted flush time, and control the solenoid to open the flush valve for the adjusted flush time in response to a flush request.

СИСТЕМА И СПОСОБ ИЗМЕРЕНИЯ РАСХОДА ТЕКУЧЕЙ СРЕДЫ, ИСПОЛЬЗУЕМОЙ ДЛЯ УПРАВЛЕНИЯ ПРОЦЕССОМ

... 1. Система определения количества текучей среды, расходуемой для обеспечения работы системы управления процессом, содержащая: ! систему управления текучей средой, функционально связанную с системой управления процессом, и ! управляемый источник питания, функционально связанный с системой управления текучей средой, которая направляет текучую среду от управляемого источника питания в систему управления процессом, чтобы определить количество текучей среды, потребляемой внутри системы управления процессом в нормальном режиме работы. ! 2. Система по п.1, отличающаяся тем, что количество потребленной текучей среды пропорционально результату абсолютного или разностного измерения количества текучей среды в управляемом источнике питания. ! 3. Система по п.1, отличающаяся тем, что содержит, по меньшей мере, один соленоидный клапан. ! 4. Система по п.3, отличающаяся тем, что дополнительно содержит соленоидные клапаны и, по меньшей мере, один передатчик давления. ! 5. Система по п.4, отличающаяся тем ...

EINRICHTUNG ZUR ERFASSUNG DER VON EINER FLUESSIGKEITSFOERDEREINRICHTUNG GEFOERDERTEN FLUESSIGKEITSMENGE

Vorrichtung und Verfahren zur Messung und Regelung einer Gasströmung mit veränderlichem Volumen.

ENTLASTUNGSVENTIL

Reglereinheit und Verfahren zum Regeln einer Klappenöffnung einer Klappe, die in einer Massenstromleitung angeordnet ist

Die vorliegende Erfindung betrifft eine Reglereinheit (50) zum Regeln einer Klappenöffnung (10) von einer in einer Massenstromleitung (12) angeordneten Klappe (4), wobei die Reglereinheit (50) folgende Merkmale umfasst: - eine Auswerteeinheit (52), die ausgebildet ist, um auf der Basis einer vordefinierten anzustrebenden Druckdifferenz (pdiff,Des) und einer Differenz zwischen Drücken (pdiff,Obs) vor und nach der Klappe (14) ein Auswertesignal (DeltaF) bereitzustellen; - einen Regler (54), der ausgebildet ist, um aus dem Auswertesignal (DeltaF) entsprechend einer Regelcharakteristik ein Ansteuersignal (DCGov) zu bestimmen; und - eine Stellglied-Reglereinheit (56), die ausgebildet ist, um die Klappenöffnung (10) der Klappe (14) in der Massenstromleitung (12) ansprechend auf das Ansteuersignal (DCGov) zu regeln.

Method for Autonomous Control of a Chemical Injection System for Oil and Gas Wells

Method for autonomous control of a chemical injection system for oil and gas wells

DEVICE FOR THE REGULAR VENTILATION OF AREAS.

EQUIPMENT AND DEVICE TO THE CLUTCH AND TRANSMISSION OF FLUID AND USE OF THE DEVICE

Liquid flow controller and precision dispense apparatus and system

Flow controller

SPRINKLER SYSTEM

LEAK DETECTION FOR AIRCRAFT

Disclosed is a sensor system for retrofitting a water supply of an airplane to detect leakage. The system includes a housing having a first band with an inner diameter sized to receive a necked portion of a valve for consumer access to the water supply. The system includes a first transducer disposed on the first band operable to provide a position measurement corresponding to a relative position between a head of the valve and the necked portion. The system includes a second transducer operable to provide a pressure measurement corresponding to a pressure of a compressed gas in a water tank of the water supply. The system includes a controller having input channels operable to receive the position measurement and the pressure measurement. The controller is operable to indicate a leak condition.

VALVES

ALTERNATIVE PRESSURE CONTROL FOR A LOW CONSTANT PRESSURE INJECTION MOLDING APPARATUS

A melt pressure regulating mechanism for an injection molding apparatus having a melt holder for pressurizing molten plastic prior to injection into a mold, the molten plastic having a melt pressure, and an injection element for advancing the molten plastic from the melt holder into the mold, the melt pressure regulating mechanism comprising: a pressure regulating device disposed between the melt holder and the mold, the pressure regulating device maintaining a substantially constant melt pressure within a mold cavity, the pressure regulating device comprising one of a fluid pressure regulating valve and a pressure relief valve. The injection molding machine forms molded parts by injecting molten thermoplastic material into a mold cavity at low constant pressures of 6,000 psi and lower.

CONTROL SYSTEM FOR SUPPLYING A GAS FLOW TO A GAS CONSUMPTIONAPPARATUS

A control system for supplying a gas flow to a gas consumption apparatus, comprising a gas supply pipe which can be connected to the apparatus and which has an electrically controlled gas control valve, and an electronic control unit. The control unit comprises a mathematical module, model-related to the control valve, for adjusting the valve position, and the gas control valve has in-built sensors for gas variables and valve position, the control system adjusting the control valve in linear proportion to a desired gas-flow signal to be supplied to the control unit. The mathematical module comprises a flow submodule, a mechanical submodule and a valve-position submodule, and the flow submodule receives, at its inputs, the desired gas-flow signal and gas variables originating from the valve sensors and supplies, at its output, a signal relating to the through-flow area of the valve, to the mechanical submodule. Said mechanical submodule contains mechanical valve parameters processed therein ...

System for measurement of process control fluid consumption

Disclosed is a system and a method for accurately measuring supply gas consumed by a particular process control component within a process control system. Enhanced measurement accuracy is derived from measuring the consumption of the process control component in a normal operating mode of the process control system. The amount of fluid expended by one process control component is separated by a fluid control system from the amount of supply gas expended in actuating other process control components. The amount of fluid expended by each component may be determined by measuring a decrease in a fluid within a vessel having a known quantity that independently supplies supply gas to each component during its operation.

VALVES

향상된 동작 범위를 갖는 질량 흐름 제어기

... 다른 실시예들 중에도 질량 흐름 제어기가 기술된다. 상기 질량 흐름 제어기는, 질량 흐름 제어기의 센서 튜브에 결합된 적어도 두 개의 감지 요소들을 포함하고, 제1 유속 범위 내의 가스의 흐름을 나타내는 제1 신호 및 제2 유속 범위 내의 가스의 흐름을 나타내는 제2 신호를 제공하도록 설계되는 열 질량 흐름 센서, 및 가스의 흐름이 제1 유속 범위 내에 있을 때 상기 제1 신호에 응답하여 질량 흐름 제어기의 밸브 위치를 제어하고 가스의 흐름이 제2 유속 범위 내에 있을 때 상기 제2 신호에 응답하여 질량 흐름 제어기의 밸브 위치를 제어하도록 구성되는 제어부를 포함한다.

VAPOR DELIVERY SYSTEM AND METHOD FOR DELIVERING A CONTROLLED FLOW OF VAPOR SUBLIMATED FROM A SOLID METERIAL TO A VACUUM CHAMBER, METHOD OF PRODUCING AN ION BEAM, AND CONTROL SYSTEM FOR CONTROLLING THE VAPOR DELIVERY SYSTEM

System, Method, and Apparatus for Monitoring Restroom Appliances

A system for monitoring flush valves includes a plurality of flush valves arranged in at least one restroom, each flush valve including a communication device configured to transmit flush valve data, and at least one controller arranged in a first flush valve and in communication with each other flush valve. The at least one controller is configured to determine a static pressure within the first flush valve, detect a second pressure within the first flush valve, determine that the second pressure is less than the static pressure, in response to determining that the second pressure is less than the static pressure, compare the second pressure with at least one other pressure associated with at least one other flush valve, and determine that the first flush valve is in need of servicing or replacement based on comparing the second pressure with the at least one other pressure.

АЛЬТЕРНАТИВНЫЕ УСТРОЙСТВА РЕГУЛИРОВКИ ДАВЛЕНИЯ ДЛЯ УСТРОЙСТВА ИНЖЕКЦИОННОГО ФОРМОВАНИЯ С НИЗКИМ ПОСТОЯННЫМ ДАВЛЕНИЕМ

... 1. Механизм регулировки давления расплава для устройства инжекционного формования, содержащего резервуар расплава для создания давления в расплавленной пластической массе перед ее впрыском в форму, при этом расплавленная пластическая масса характеризуется давлением расплава, и устройство впрыска, для подачи расплавленной пластической массы из резервуара расплава в форму, при этом механизм регулировки давления расплава содержит:устройство регулировки давления, расположенное между резервуаром расплава и формой, при этом устройство регулировки давления выполнено с возможностью поддержания в сущности постоянного давления расплава внутри полости формы, при этом устройство регулировки давления содержит один из клапанов: клапан регулировки давления текучей среды или клапан сброса давления.2. Механизм регулировки по п. 1, отличающийся тем, что устройство регулировки давления является клапаном регулировки давления текучей среды, содержащим:корпус клапана, имеющий входной патрубок для расплавленной ...

ПPEДOXPAHИTEЛЬHЫЙ PACПPEДEЛИTEЛЬHЫЙ KЛAПAH УПPABЛEHИЯ

Improvements in and relating to fuel-supply apparatus for heating appliances in vehicles

... 1,125,219. Liquid fuel supply systems for burners. WEBASTO-WERK G.m.b.H. 14 Aug., 1967 [10 Nov., 1966], No. 37276/67. Heading F4T. Fuel is supplied to the burner 2 of a vehicle heating appliance from a storage container 3 through an electromagnetically operated diaphragm pump 4, a dosing device 5 and a delivery pipe 6, the dosing device 5 comprising a Venturi tube 7, a proportioning nozzle 8, a membrane 9 and a controlled fuel valve 10, the membrane 9 dividing the dosing device into an admission chamber 11 and a delivery chamber 12 and air for combustion is supplied to the burner 2 by a blower 16 which is connected by a conduit 18 to the Venturi tube 7 and hence via nozzle 8 to the chamber 11, and the blower 16 is also connected to chamber 12 by a conduit 19. Air passing through the Venturi tube 7 causes a reduction in pressure in chamber 11 to distort the diaphragm 9 and open fuel valve 10 through a push-rod 14 so that the desired fuel/air ratio is obtained.

Fuel fuel injection system

SWITCHING VALVE WITH SLIDEGATE VALVE

ABSPERRSICHERUNG IN ROHRLEITUNGEN

SYSTEM AND METHOD FOR A DIAPHRAGM VALVE CONTROLLED THROUGH MEASUREMENT OF WATER PRESSURE AND SOLENOID OPENING TIME

A flush valve system is provided having an inlet and an outlet, and a main valve element adapted for transition between a closed position and an open position is disclosed. The flush valve further includes a control chamber in communication with the inlet, and a vent outlet in communication with the outlet. The system includes a solenoid for establishing communication between the control chamber and the vent outlet to establish a pressure differential across a portion of the main valve element. The system also includes a power supply for energizing the solenoid, a deployable actuator in communication with the power supply, and a microprocessor in electrical communication with the main valve element. The microprocessor is adapted to determine a valve opening time, calculate fluid pressure based on the valve opening time, and deliver a predetermined quantity of fluid through the valve based on fluid pressure.

PRESSURE REDUCTION AND FLOW REGULATION DEVICE

The invention provides a pressure regulator (1) for low pressure delivery of gases from a high pressure source. The regulator comprises a gas inlet (2) and a gas outlet (3) defining a gas path (4) therebetween. A regulating element (5) is disposed downstream of the inlet and remote from the gas path (4). The device also includes heat exchange means (15) in the form of a powered heater or non-powered ambient heater disposed intermediate the gas inlet (2) and the regulating element (5). The regulating element (5) is resiliently displaceable in the response to gas pressure and mechanically connected to operate a valve (6) at the gas inlet (2) to thereby regulate the gas pressure at the gas outlet (3). The regulator of the invention can advantageously be used in a gas distribution system delivering gaseous fumigant from a high pressure source such as a cylinder of fumigant in a liquefied CO2 base, the regulator providing a sensitive and accurate pressure regulation that is more robust and less ...

UNIT OF REGULATION AND PROCESS OF REGULATION OF the OPENING Of a SHUTTER INSTALLS IN a CONDUIT OF MASS THROUGHPUT.

Unité de régulation (50) pour réguler une ouverture de volet (10) d'un volet (14) installée dans une conduite de débit massique (12), l'unité de régulation (50) comprend les moyens suivants : - une unité d'exploitation (52) réalisée pour fournir un signal d'exploitation (ΔF) sur le fondement d'une différence de pression prédéfinie, souhaitée (pdiff, Des) et d'une différence entre les pressions (pdiff, Obs) en amont et en aval du volet (14), - un régulateur (54) pour définir un signal de commande (DCGov) à partir du signal d'exploitation (ΔF) et en fonction d'une caractéristique de régulation, et - une unité de régulation-actionneur (56) réalisée pour réguler l'ouverture (10) du volet (14) dans la conduite de débit massique (12) en fonction du signal de commande (DCGov).

Improvements brought to the gas purifiers, in particular for blast furnaces

ELECTROHYDRAULIC CONTROL DEVICE

PIPELINE BREAK SHUTOFF CONTROL

실시간으로 질량 유량 제어기를 통과하는 흐름을 모니터링하는 시스템 및 방법

... 질량 유량 제어기는, 상기 질량 유량 제어기를 통과하는 질량의 유속을 측정하도록 구성되고 구현되는 제 1 유량계; 상기 질량 유량 제어기를 통과하는 질량의 유속을 측정하도록 구성되고 구현되는 제 2 유량계; 상기 질량 유량 제어기를 통과하는 질량의 유속을 상기 유량계 중 하나에 의하여 측정된 바와 같은 유속의 함수로서 생성되는 제어 신호에 응답하여 제어하기 위하여 구성되고 구현되는 제어 밸브; 및 제어 신호를 생성하고, 상기 제 1 유량계에 의하여 측정된 바와 같은 질량의 유속 및 상기 제 2 유량계에 의하여 측정된 바와 같은 질량의 유속 사이의 차분이 임계를 초과할 경우 표시를 제공하도록 구성되고 구현되는 시스템 제어기를 포함한다.

SYSTEM FOR AND METHOD OF MONITORING FLOW THROUGH MASS FLOW CONTROLLERS IN REAL TIME

Valve control mechanism

Kit and device for connecting and transferring fluid and the use of said device

The high-pressure output (2) of a donor container is coupled to a user system (11) by means of a main transfer tube (4) through a pilot valve (5) controllable by an auxiliary line (6) which is connected (12) to an auxiliary circuit of the system (11), extends along the main tube (15) and is fixed thereto by the reduced length thereof at several distinct points (S_i). In such a way, the rupture or inflammable leakage of the tube (4) generates the tearing off or meting of the auxiliary line (6) in such a way that the output valve (5) is immediately closed. Said invention is particularly suitable for an inflammable gas supply to stationary plants.

Pilot operated fluid pressure control valve

СПОСОБ И УСТРОЙСТВО ДЛЯ ОПРЕДЕЛЕНИЯ И КОНТРОЛЯ СТАТИЧЕСКОГО ДАВЛЕНИЯ ФЛЮИДА С ПОМОЩЬЮ ВИБРАЦИОННОГО ИЗМЕРИТЕЛЯ

Изобретение относится к способу и устройству для определения и управления статическим давлением флюида с помощью вибрационного измерителя системы определения расхода флюида. Расходомерная система (300) для флюида включает в себя флюид, текущий через трубопровод (301), первый датчик (303) давления, расположенный в трубопроводе (301), и вибрационный измеритель (5). Вибрационный измеритель (5) включает в себя сборку (10) датчика, связанную флюидом с первым датчиком (303) давления. Способ включает в себя этапы измерения давления флюида в трубопроводе (301), используя первый датчик (303) давления и измеряя одну или несколько характеристик потока флюида, используя вибрационный измеритель (5). Способ дополнительно включает в себя этап определения статического давления флюида на основании давления флюида в пределах сборки датчика (10) и одной или нескольких характеристик потока. Способ дополнительно включает в себя этап определения того, содержит ли флюид, по меньшей мере, некоторое количество ...

СПОСОБ И УСТРОЙСТВО ДЛЯ ОПРЕДЕЛЕНИЯ И КОНТРОЛЯ СТАТИЧЕСКОГО ДАВЛЕНИЯ ФЛЮИДА С ПОМОЩЬЮ ВИБРАЦИОННОГО ИЗМЕРИТЕЛЯ

... 1. Расходомерная система (300) для флюида, содержащая:трубопровод (301) с протекающим флюидом;первый датчик (303) давления, расположенный в трубопроводе (301) и определяющий первое давление в трубопроводе (301);вибрационный измеритель (5), включающий в себя:сборку датчика (10), расположенную в трубопроводе (301) вблизи первого датчика давления и связанную флюидом с первым датчиком (303) давления; и измерительная электроника (20), электрически связанная со сборкой датчика (10) и сконфигурированная для приема одного или нескольких сигналов (210) датчика и для измерения одной или нескольких характеристик потока;системный контроллер (310), электрически связанный с первым датчиком (303) давления и электрически связанный с измерительной электроникой (20) и сконфигурированный для:приема первого измерения давления от первого датчика (303) давления;приема одной или нескольких характеристик потока от измерительной электроники (20);определения статического давления флюида на основании давления флюида ...

Vorrichtung zur Druckreduzierung und zur Massenstromregelung

Schaltventil mit Schieber

Schaltventil für die Übertragung von Fluiden, insbesondere zum Befüllen von Gastanks, mit einem Einlassbereich und einem Auslassbereich an einem Gehäuse, in dem ein Rückschlagventil, ein Entlüftungsventil und ein Einlassventil angeordnet sind, wobei das Entlüftungsventil und das Einlassventil von einem Schieber gesteuert sind, dadurch gekennzeichnet, dass der Schieber (27) mit einem Schwenkhebel (50) gekoppelt ist, der von einem Steuerventil (20) druckgesteuert betätigbar ist.

Verfahren zum Betreiben einer Kraftstofftankeinrichtung für ein Kraftfahrzeug sowie entsprechende Kraftstofftankeinrichtung

Verfahren zum Betreiben einer Kraftstofftankeinrichtung (1) für ein Kraftfahrzeug, mit einem Kraftstofftank (2), dem eine Tankentlüftungsleitung (4) zugeordnet ist, sowie mit einem Tankabsperrventil (5) zum Einstellen eines Durchströmungsquerschnitts der Tankentlüftungsleitung (4), wobei das Tankabsperrventil (5) zum Einstellen eines ersten Durchströmungsquerschnitts mit einer ersten elektrischen Spannung und zum Einstellen eines zweiten Durchströmungsquerschnitts mit einer zweiten elektrischen Spannung beaufschlagt wird, wobei das Tankabsperrventil (5) bei einem Umschalten von dem ersten Durchströmungsquerschnitt auf den zweiten Durchströmungsquerschnitt und/oder umgekehrt zunächst für eine bestimmte Übergangszeitspanne mit einer zwischen der ersten Spannung und der zweiten Spannung liegenden Übergangsspannung beaufschlagt wird, dadurch gekennzeichnet, dass die Übergangsspannung für die bestimmte Übergangszeitspanne beibehalten wird, und dass die Dauer der Übergangszeitspanne und/oder ...

Differential pressure detector with reduced reaction forces

Method and apparatus for determining and controlling a static fluid pressure through a vibrating meter

A method for operating a fluid flow system (300) is provided. The fluid flow system (300) includes a fluid flowing through a pipeline (301), a first pressure sensor (303) located within the pipeline (301), and a vibrating meter (5). The vibrating meter (5) includes a sensor assembly (10) in fluid communication with the first pressure sensor (303). The method includes steps of measuring a pressure of the fluid within the pipeline (301) using the first pressure sensor (303) and measuring one or more flow characteristics of the fluid using the vibrating meter (5). The method further includes a step of determining a static pressure of the fluid based on the pressure of the fluid within the pipeline (301) and the one or more flow characteristics. The method further includes a step of determining if the fluid contains at least some gas based on the static pressure of the fluid.

METHOD AND APPARATUS FOR VARYING THE CROSS-SECTIONAL AREA OF THE THROAT OF A VENTURI TUBE

VALVES

MICROFLUIDIC DEVICE

La présente invention concerne un dispositif microfluidique (1) comportant au moins un microcanal (2) relié à une extrémité à une enceinte (6), caractérisé par le fait qu'il comporte en outre un circuit d'entrée (8) et un circuit de sortie (9) reliés à l'enceinte et entre lesquels peut s'établir un écoulement de fluide sans contact avec le microcanal, l'un au moins des circuits d'entrée et de sortie étant contrôlable de manière à modifier la pression à ladite extrémité du microcanal, indépendamment de la pression à une autre extrémité du microcanal.

SYSTEM FOR MEASUREMENT OF PROCESS CONTROL FLUID CONSUMPTION

A system and method for accurately measuring supply gas consumed by a particular process control component within a process control system is disclosed. Enhanced measurement accuracy is derived from measuring the consumption of the process control component in a normal operating mode of the process control system. The amount of fluid expended by one process control component is separated by a fluid control system from the amount of supply gas expended in actuating other process control components. The amount of fluid expended by each component may be determined by measuring a decrease in a fluid within a vessel having a known quantity that independently supplies supply gas to each component during its operation.

WATER SUPPLY PRESSURE CONTROL APPARATUS

... ? ? (Fig 2) FLUID SUPPLY PRESSURE CONTROL APPARATUS A fluid supply pressure control apparatus for use in conjunction with a pressure control valve (10) of a fluid supply system is disclosed which includes: first sensor means (26, 28) for sensing the pressure of the fluid of a first point (12, 14) in the system, and first control means (16) for controlling the pressure control valve (10) to adjust the pressure of the fluid at the first point in the system in accordance with a difference between the pressure sensor by the first sensor means and a predetermined pressure valve. The apparatus further includes second control means (24) for controlling the predetermined pressure value to reduce fluctuations in the fluid pressure at a second point in the system. The aim of this apparatus is to maintain the lowest possible pressure in the supply pipes commensurate with maintaining a reasonable pressure in outlying and elevated areas and with meeting the demand for water. This provides a means of ...

APPARATUS FOR THE CONTROLLED VENTILATION OF ROOMS

An apparatus for the controlled ventilation of a room has a control mechanism, which includes a quantity control and measurement means, and is incorporated in a ventilation duct portion. The control mechanism includes a tubular, hollow body in the form of a flow body which has two pressure measuring chambers arranged successively in flow direction. The chambers are provided with rows of openings which produce a connection to flow-through cross-sections of the control mechanism which have different airflow speeds. The airflow is measured by means of a differential pressure detector, which is connected to the pressure measuring chambers by means of two short passages. The apparatus has a low airflow loss and a low flow noise. As a result of its favourable flow guidance, the apparatus may be positioned directly adjacent to branching points of a ventilation duct.

Liquid flow controller and precision dispense apparatus and system

PROCESS AND APPARATUS FOR FORMING FLUID TRANSFER AND USE OF SUCH A DEVICE

CONTROL VALVE DEVICE

Thermal mass flow controller and method for improved performance across fluid types

SPRINKLERANLEGGNING

Gas valve with fuel rate monitor

This disclosure relates generally to valves, and more particularly, to gas valve assemblies. In one illustrative but non-limiting example, a valve assembly may include a flow module for sensing one or more parameters of a gas flowing through the fluid path of the gas valve, and may determine a measure that is related to a gas flow through the fluid path. A measure related to a gas flow may include, but is not limited to, a measure of fuel consumption by a device or appliance attached to an output port of the valve assembly. Illustratively, the flow module may include one or more valve controllers in communication with one or more pressure sensors, one or more flow sensors, one or more temperature sensors, one or more valve position sensors, and/or any other suitable sensors as desired.

Gas shutoff device

The present invention provides a gas shutoff device that prevents tampering procurement of gas or tamper due to stealing of the gas shutoff device. When an event, in which a gas pressure value of a pressure measuring unit 32 after a predetermined operation performed by a provider in installation is kept equal to or less than a first predetermined pressure value for a first predetermined time or longer and then the gas pressure value is kept equal to or more than a second predetermined pressure value for a second predetermined time or longer, happens at a predetermined number of times, the gas is shut off by a shutoff unit 39 , communication with the outside is performed by an external communication unit 34 , restoration is permitted by a restoring unit 38 while when there is a predetermined operation by the provider after the shutoff, the restoration permission state implemented by communicating with the outside by the predetermined operation by the provider and inputting communication of a response from the outside.

Actuator Device Having An Open/Close Valve

An arrangement in which a valve assembly is provided between the supply air inlet and the magnetic valve that is activated by a position threshold sensor that can be activated by the actuator element and/or a pressure threshold sensor registering the actuating pressure on the magnetic valve and connects the magnetic valve directly to the supply air to increase the availability of the actuator device when the position threshold sensor detects the attaining of a specified operation position of the actuator element or the pressure threshold sensor detects the failure to attain a specified minimum pressure.

Volume Booster With Seat Load Bias

A fluid flow control device includes a trim cartridge, a diaphragm assembly, and a control element. The trim cartridge defines a cartridge supply port and an upper planar surface. The cartridge supply port is disposed along a supply path of the volume booster and the upper planar surface is disposed along an exhaust of the volume booster. The diaphragm assembly defines an exhaust port on the exhaust path. The control element is movably disposed in the trim cartridge and includes a supply plug, an exhaust plug, and a stem. The supply plug engages the cartridge supply port and the exhaust plug engages the exhaust port. The exhaust plug further includes a lower planar surface that is coplanar with the upper planar surface of the trim cartridge.

Method for Assembling an Electromagnetic Gas Valve, and Electromagnetic Gas Valve

A method of assembling an electromagnetic gas valve having a first body, a second body, a unit comprising a valve disc and stem assembly coupled to a moveable insulating structure having a projecting member, an electromagnet assembly comprising a magnet fixed within the second body and a coil wound on a moving part with a cavity adapted to receive the projecting member, the first body having a gas inlet, a gas outlet and a through hole disposed between the gas inlet and outlet. In one implementation the insulating structure is coupled to the electromagnetic assembly by introducing a fluid under pressure into the gas outlet or gas inlet to act upon the unit to cause the projecting member to move in a direction towards the inside of the second body and into the cavity of the moving part of the electromagnet assembly.

Bathroom flushers with novel sensors and controllers

A bathroom flusher includes a body having an inlet in communication with a supply line and an outlet in communication with a flush conduit, a valve assembly in the body positioned to close water flow between the inlet and the outlet upon sealing action of a moving member at a valve seat thereby controlling flow from the inlet to the outlet, and an actuator for actuating operation of the moving member. The bathroom flusher includes one of several novel sensors and is controlled by one of several novel controllers, as described. The controller may execute a novel control algorithm.

Compressed gas tank system with fast fueling ability at any vessel pressure

A method of fueling with compressed gas is described. In one embodiment, the method includes providing a supply of compressed gas; providing a storage tank with a fueling line, and a nozzle in the fueling line, the nozzle movable between at least a flow reduction position and a full fuel flow position; initiating fueling from the supply of compressed gas with the nozzle in the flow reduction position for a predetermined time or until a minimum pressure is obtained; when the predetermined time or the minimum pressure is obtained, moving the nozzle to the full fuel flow position; and fueling the storage tank from the supply of compressed gas with the nozzle in the full fuel flow position until fueling is completed. A vehicle incorporating the nozzle is also disclosed.

Valve unit for controlling the delivery ofa combustible gas, in particular for delivery via a gas metering apparatus, and gas meter including said valve unit

A valve unit for controlling the delivery of a combustible gas, in particular for delivery via a gas metering apparatus including a main gas through-flow pipe ( 2 ), the unit comprising a servovalve with a first valve seat ( 3 ) provided on the pipe and associated with a respective first shutter ( 6 ) with diaphragm control ( 7 ) for the opening of the seat ( 3 ) in opposition to a first return spring ( 22 ), an operating chamber ( 10 ) for controlling the servovalve, the chamber being in communication with an inlet section ( 4 ) of the main pipe ( 2 ), upstream of the first valve seat ( 3 ), one side ( 7 a ) of the diaphragm ( 7 ) being subjected to the pressure prevailing in the chamber ( 10 ), the other side ( 7 b ) being subjected to the pressure prevailing downstream of the first valve seat, in the region of an outlet section ( 5 ) of the pipe ( 2 ), the operating chamber ( 10 ) being in communication with the outlet section ( 5 ) via a second valve seat ( 9 ) co-operating with a second shutter ( 8 ). The unit also comprises an actuating rod ( 13 ) operatively associated with the first and the second shutter ( 6, 8 ), for controlling same for the opening or closing of the respective seats ( 3, 9 ), and a drive means ( 14 ) associated with the actuating rod ( 13 ) in order to move the shutters ( 6, 8 ) away from and towards the respective valve seats ( 3, 9 ), wherein the actuating rod ( 13 ) is secured to at least the first shutter ( 6 ) so as to be able to slide in a limited manner with respect thereto, with a predetermined play, such that the rod is movable by means of the actuation of the drive means ( 14 ), without interference with the first shutter ( 6 ) along at least a portion of the lifting stroke of the shutter ( 6 ) and also in opposition to the resilient action of a return means ( 15 ), in order to store energy in the return means ( 15 ) and transfer it to the first shutter ( 6 ) in order to urge this away from the valve seat ( 3 ) and ensure ...

Combination manual/pneumatic shut-off valve

A method of preventing a mass flow controller from participating in crosstalk in an array of mass flow controllers is described. The method includes sensing and providing a signal indicative of a fluid pressure inside of a mass flow controller with a pressure sensor contained within the mass flow controller, determining a response of a control valve to a rapid pressure perturbation at the inlet of the mass flow controller using the signal indicative of the fluid pressure to avoid overcompensation for the rapid pressure perturbation, and adjusting a control valve contained within the mass flow controller downstream of the pressure sensor, based on the determined response, so that the mass flow controller avoids overcompensating for the rapid pressure perturbation. The pressure sensor is positioned such that the pressure sensor is sensitive to rapid pressure perturbations at the inlet of the mass flow controller.

Method and apparatus to detect the presence of hydraulic pressure in a transmission

A method is provided to detect the presence of hydraulic line pressure in a hydraulic control system in an electromechanical transmission. The method includes determining an estimated hydraulic line pressure of the hydraulic control system based upon an input flow and an output flow of hydraulic fluid. The input flow and output flow are regulated with a pressure control device, which is energizable on operator demand. A pressure detection device is fluidly connected to the pressure control device to detect the presence of hydraulic pressure. An override module is applied to the estimated hydraulic line pressure to determine a corrected hydraulic line pressure. The override module sets the corrected hydraulic line pressure to predetermined values based on the operating state indicated by the pressure detection device. The override module corrects for an over-estimation of hydraulic line pressure in operating conditions such as low environmental temperatures.

Gas supplying apparatus, cylinder cabinet provided with the same, valve box, and substrate process apparatus

A disclosed gas supplying apparatus includes a pressure controller that reduces a primary pressure thereby providing a secondary pressure greater than a process pressure at which a predetermined process is performed and less than the atmospheric pressure in a secondary pipe; a pressure sensor that measures a pressure in the secondary pipe; a first open/close valve provided in the secondary pipe; an open/close valve controller that opens or closes the first open/close valve; a pressure comparator that compares the pressure measured by the pressure sensor in the secondary pipe with a first set pressure that is greater than the process pressure by a predetermined pressure; and a controller that outputs a signal to the open/close valve controller thereby closing the first open/close valve, when the pressure comparator determines that the pressure in the secondary pipe is less than the first set pressure.

Pressure controlling apparatus

According to one embodiment, there is provided pressure controlling apparatus including a detecting unit, an exhaust pipe, a regulating valve, and a pressure controlling unit. The regulating valve includes a valve port, a changing unit, and a slide valve. The valve port is communicated with the exhaust pipe. The changing unit changes a shape of the valve port to a different shape whose center is located near the central axis of the exhaust pipe. The slide valve regulates an opening degree of the valve port changed by the changing unit. The pressure controlling unit controls changing of a shape of the valve port by the changing unit and regulation of an opening degree of the valve port by the slide valve.

Automated System for Low Pressure Fluid Recovery

An automated low pressure fluid recovery system is disclosed. An eductor receives low pressure fluid from a source, for example vapors from a hydrocarbon tank. The eductor also receives high pressure fluid from another source, for example the output of a compressor or a well. By venturi principles the two fluid streams are mixed and a third intermediate fluid stream is formed, which is routed to a desired location. The low pressure fluids are thereby beneficially captured and sold or otherwise used. Various sensing devices, such as pressure and temperature sensors, emit signals to a programmable logic controller, which in turn automatically manipulates various control mechanisms to efficiently and safely control fluid flow through the system.

Apparatus Using Electronically-Controlled Valves

The pumps and pressure controllers described herein aim to pump fluid in two directions, such as from a first port to a second port and vice versa. The pressure controllers aim to control pressure in a system or device, such as a test device, accurately and precisely at a variety of different pressure levels. Generally described, the pumps and pressure controllers described herein may include two or more control valves, which may be actuatable in such a manner so that the pump or pressure controller can switch between operating as a vacuum pump and operating as a compressor. In some embodiments, the pressure controllers may be able to adjust a pressure in the device by small increments thereby providing increased control of the pressure in the device over the prior art. Furthermore, the pressure controllers may be able to control the pressure of a system having low pressure levels.

Water volume and pressure control system

A system for remotely controlling the supply and pressure of water to a building includes one or more sensors for detecting the presence of water in undesirable locations, a water flow and pressure regulation unit connected to the building water input supply, and a system controller capable of providing wireless communication with a user via a plurality of external devices.

Vapor Delivery Device, Methods of Manufacture And Methods of Use Thereof

A method comprises transporting a first stream of a carrier gas to a delivery device that contains a solid precursor compound. The first stream of carrier gas is at a temperature greater than or equal to 20° C. The method further comprises transporting a second stream of the carrier gas to a point downstream of the delivery device. The first stream and the second stream are combined to form a third stream, such that the dewpoint of the vapor of the solid precursor compound in the third stream is lower than the ambient temperature. The flow direction of the first stream, the flow direction of the second stream and the flow direction of the third stream are unidirectional and are not opposed to each other.

Electromagnetic flow rate control valve and high-pressure fuel supply pump using the same

High-response and high-power electromagnetically driven flow rate control valve with flange portion forming an attracting surface on an anchor, a first peripheral surface portion having a diameter smaller than the flange portion, and a cylindrical non-magnetic area opposing an outer peripheral surface of the flange portion with a third clearance interposed therebetween are provided, and a first fluid trap portion communicating with the back pressure chamber via the third clearance is provided. When the diameter of the flange portion is enlarged in order to enlarge the cross-sectional area of the attracting surface, fuel that is displaced by the anchor is increased, but is partly absorbed in the first fluid trap portion, so that the fuel passing through the fuel channel does not increase in comparison with fuel before the diameter of the flange portion is enlarged. Accordingly, the cross-sectional area of the attracting surface may be enlarged.

Method for water hammerless opening of fluid passage, and method for supplying chemical solutions and device for water hammerless opening for which the method is used

The water hammerless opening device comprises an actuator operating type valve installed on the fluid passage, an electro-pneumatic conversion device to supply the 2-step actuator operating pressure Pa to the afore-mentioned actuator operating type valve, a vibration sensor removably fixed to the pipe passage on the upstream side of the actuator operating type valve, and a tuning box to which the vibration detecting signal Pr detected by the vibration sensor is inputted, through which the control signal Sc to control the step operating pressure Ps′ of the afore-mentioned 2-step actuator operating pressure Pa is outputted to the electro-pneumatic conversion device, and with which the 2-step actuator operating pressure Pa, of the step operating pressure Ps′ which makes the vibration detecting signal Pr nearly zero, is outputted from the electro-pneumatic conversion by adjusting the control signal Sc.

Hydraulic valve with pressure limiter

An assembly of valve sections 10 includes an inlet section 12 , an outlet section 14 , a working section 16 , and a working section 18 . The working section 16 is a conventional pressure compensated working section. The working section 18 includes a directional control valve 21 , a pressure compensator valve 50 , and a pressure limiter valve 52 . The valves 50 and 52 are of integral construction, such that each is an essential part to complete the other. The pressure compensator valve 50 includes a pressure compensator spool 60 movable between an opened position (FIGS. 2 and 5 ) and a closed position (FIGS. 4 and 6 ) in response to a pressure differential across the spool. The pressure limiter valve 52 includes a pressure limiter spool 76 that moves to an open position to change the pressure differential and close the pressure compensator valve when a selected limit pressure is reached.

Control Valve Assembly

Embodiments of the invention provide a control valve assembly and method of fault detection that includes adjusting a valve between an operating position and a fault position in response to various fault conditions. The control valve assembly is adjustable to accommodate fault conditions encountered in a variety of electrochemical deionization systems.

Displacement control valve

A displacement control valve includes an electromagnetic solenoid, a drive force transmitting body actuated, and a pressure sensitive portion having a pressure sensitive body that selectively extends and contracts in the movement direction of the drive force transmitting body in correspondence with pressure in a pressure sensitive chamber. A first valve body is arranged in the pressure sensitive body to adjust the cross-sectional area of an outlet passage. A second valve body is connected to the drive force transmitting body to adjust the cross-sectional area of a supply passage. The pressure sensitive body is movable in the movement direction of the drive force transmitting body in the pressure sensitive chamber. The pressure sensitive chamber is configured to communicate with the control pressure chamber. The pressure sensitive body is urged by the pressure in the control pressure chamber in the direction in which the first valve body closes.

Gas valve with high/low gas pressure detection

This disclosure relates generally to valves, and more particularly, to gas valve assemblies. In one example, the valve assembly may include a valve body with a fluid path, one or more valves or valve sealing members positioned across the fluid path, and one or more pressure sensors in fluid communication with a fluid path of the valve assembly. The valve assembly may include a valve controller in communication with the pressure sensors, where the valve controller may be configured to compare a measure related to a pressure sensed by the one or more pressure sensors to a pressure threshold value (e.g., a high pressure threshold value, a low pressure threshold value, or other pressure threshold value). If the measure surpasses the threshold value, the valve controller may provide a predetermined output signal indicating a pressure event has occurred, such as a high or low gas pressure event.

Apparatus for flow regulation

An apparatus for regulating the flow of a fluid from a source to a target location comprises a housing defining a fluid inlet configured to communicate with a fluid source and a fluid outlet configured to communicate with a target location, and a flow path extending between the fluid inlet and fluid outlet. An inlet valve assembly is mounted in the flow path and comprises a valve seat and a valve member configured to cooperate with the valve seat to regulate flow through the flow path. A balance arrangement is provided and is configured to balance the effect of fluid pressure acting on the inlet valve assembly.

Gas valve with fuel rate monitor

This disclosure relates generally to valves, and more particularly, to gas valve assemblies. In one illustrative but non-limiting example, a valve assembly may include a flow module for sensing one or more parameters of a gas flowing through the fluid path of the gas valve, and may determine a measure that is related to a gas flow through the fluid path. A measure related to a gas flow may include, but is not limited to, a measure of fuel consumption by a device or appliance attached to an output port of the valve assembly. Illustratively, the flow module may include one or more valve controllers in communication with one or more pressure sensors, one or more flow sensors, one or more temperature sensors, one or more valve position sensors, and/or any other suitable sensors as desired.

Stepper Motor Gas Valve and Method of Control

A stepper-motor gas valve control is disclosed that includes a main diaphragm in a chamber that controllably displaces a valve relative to an opening in response to changes in pressure, to adjust fuel flow through the valve. A servo-regulator diaphragm is provided to regulate flow to the main diaphragm, to thereby control the rate of fuel flow. A stepper motor is configured to move in a stepwise manner to displace the servo-regulator diaphragm, to control fluid flow to the main diaphragm. A controller mounted on the stepper-motor regulated gas valve control receives and converts an input control signal from a heating system to a reference value between 0 and 5 volts, and selects a corresponding motor step value. The control responsively moves the stepper-motor in a step wise manner to displace the servo-regulator diaphragm and thereby regulates the rate of fuel flow through the valve.

Piezoelectric blower piloted valve

This disclosure describes systems and methods for piloting a pneumatic valve using one or more piezoelectric blowers. According to embodiments, the one or more piezoelectric blowers may be coupled to the pneumatic valve to form a small, light-weight pneumatic valve that may be placed proximal to a ventilated patient, e.g., at the patient wye or the patient interface. Due to the close coupling of the one or more piezoelectric blowers, the pneumatic valve has a substantially shorter response time than traditional pneumatically piloted valves. Moreover, when piezoelectric blowers are coupled to the pneumatic valve in parallel, response time may be further decreased. Additionally or alternatively, when piezoelectric blowers are coupled to the pneumatic valve in series, pilot pressure may be increased as a function of the number of piezoelectric blowers in the series.

Fluid controller

A fluid controller is disclosed, having a body unit, a fluid controlling valve, pressure sensors, and a casing. The fluid controlling valve is attached to a component part attachment face of the body unit. The pressure sensors are attached to the component part attachment face so that the pressure sensing surfaces thereof are positioned substantially perpendicular to the component part attachment face and substantially parallel to the longitudinal direction. On the lateral walls of the casing, the inner surfaces thereof are arranged to be uneven, so that such sections facing the fluid controlling valve and the pressure sensors are arranged to be thin sections, whereas at least a part of such a section that does not face the fluid controlling valve and the pressure sensors is arranged to be a thick section that is thicker than the thin sections.

Apparatus, Systems and Methods for a Flow Control Device

A flow control device for control of fluid flow through a tubular member comprises a control chamber having a piston disposed therein, where the piston is moveable from an open piston position to a closed piston position by the application of a first fluid pressure, and a valve chamber having a valve therein, where the valve is moveable from a closed valve position to an open valve position by the application of a second fluid pressure. A seal preventing fluid flow through the control chamber into the tubular member is formed in the closed piston position, and a flow path through the valve chamber and into the tubular member is formed in the open valve position.

Fuel metering system

A fuel metering system includes a bypass valve configured to receive a fuel flow under a pressure P 1 , a pressure regulating valve in fluid communication with the bypass valve and configured to receive a fuel flow under a pressure P Q , a metering valve in fluid communication with the bypass valve and the pressure regulating valve, and configured to receive the fuel flow under the pressure P 1 and to output a fuel flow under a pressure P 2 , a single stage servo valve in fluid communication with the bypass valve, the pressure regulating valve and the metering valve, and configured to receive the fuel flow under the pressure P 1 , and to output the fuel flow under the pressure P Q , and to output a fuel flow under a pressure P M , and a linear variable differential transformer coupled to the metering valve.

Pressure control valve with pressure cycling control

A spool valve includes a housing having a spring-enclosing portion and a spool-enclosing portion aligned along a longitudinal axis. A spool is mounted for reciprocal axial movement in the housing and a piston is fixed to one end of the spool. The spool-enclosing portion supports a stationary bushing having a bore receiving an opposite control end of the spool, the bushing formed with a first plurality of radially-oriented passages opening into an annular groove formed in the bore, the groove having sloped side edges. The spool supports plural ring-seals arranged to engage the sloped side edges of the annular groove and thereby seal off the radially-oriented passages when the spool is in a neutral position. Movement of the spool is adjustably limited in one direction and dampened in both axial directions.

Transmission control apparatus and adjustment method for output characteristic thereof

In a linear solenoid 107 n , an electromagnetic coil 71 n , a pressure sensor 72 n , and label resistors 73 n and 74 n for correcting an inherent variation in a pressure detection characteristic are integrated; the standard characteristic of the pressure sensor 72 n is stored in a control module 120 M; when driving is started, the resistance values of the label resistors 73 n and 74 n are read, the pressure detection characteristic of the utilized pressure sensor 72 n is corrected, and an excitation current for the electromagnetic coil 71 n is controlled in such a way that a target adjusted hydraulic pressure is obtained. Even when due to a change in the oil temperature, the valve opening characteristic of the linear solenoid 107 n changes, the adjusted hydraulic pressure is controlled to be constant.

Control valve having a device for generating defined braking and release times

A control valve for an indirectly acting compressed-air brake of a rail vehicle includes a pneumatic relay valve for controlling a brake cylinder pressure via a pilot-control circuit for generating a temporally defined pilot-control pressure for the proportional activation of the relay valve, wherein, connected upstream of the pilot-control circuit, there is provided a device for generating the braking and release times of the compressed-air brake, wherein the device for generating uniform braking and release times of the compressed-air brake has mechanisms for realizing a volume flow with constant pressure change for the compressed-air supply and the de-aeration of the pilot-control circuit.

Calibration of a Chemical Dispense System

In one implementation, a method for providing a fluid at a target pressure may include providing a fluid at a velocity to a supply line through a dispenser, measuring a pressure of the fluid flowing through the supply line, comparing the measured pressure with the target pressure, and adjusting the velocity based on the results of the comparison.

Fail-safe actuation system

Disclosed is a fail-safe fluidic actuation system ( 1 ) having a safety position, comprising a control element ( 2 ) having at least one first and one second chamber ( 3, 4 ); having a working circuit ( 5 ) with a motor/pump device ( 6 ), wherein the control element can be actuated by means of the working circuit at least in the operational state. Furthermore, the actuating system comprises a discharge valve ( 9 ) which, in a failure state, is placed into a pass-through position in order to discharge fluid from the second chamber, and the safety circuit is designed such that, in the operational state, an inflow decoupled from the store can be generated into the control element by means of the working circuit with the motor/pump device, wherein by means of the safety circuit, in a failure state, an inflow fully decoupled from the working circuit with the motor/pump device is provided into the first chamber by means of the store, wherein the control element has three chambers, and wherein the safety circuit is designed such that, in the operational state, an inflow decoupled from the store can be generated into the third chamber ( 15 ) by means of the working circuit with the motor/pump device.

Valve assembly for high-pressure fluid reservoir

A valve assembly is disclosed for controlling fluid flow between two reservoirs. The valve assembly includes a relief valve arranged inside the housing and configured to open a first fluid flow path when the first reservoir is above a first predetermined pressure value.

Cold start valve and hydraulic arrangement having a cold start valve of this type

A cold start valve for a hydraulic circuit has a valve slide with two counteracting control faces. It is possible to load a first control face with a control pressure and to load a second control face with a feed pressure. In addition, the first control face is loaded with the spring force of a valve spring. A damping space is configured to damp a stroke movement of the valve slide. The damping space is delimited by a damping face formed on the valve slide and oriented in accordance with the first control face. The damping face is configured to be loaded via the damping space with a damping pressure to damp the stroke movement. The damping space is connected in a throttled manner to a pressure space. The second control face of the valve slide is configured to be loaded with the feed pressure via the pressure space.

Method of Monitoring Wear in a Diaphragm Valve Using Pressure Detection

A system for detecting wear in a flush valve includes at least one pressure sensor adapted to measure a water pressure within the flush valve and at least one microprocessor in communication with the at least one pressure sensor. The at least one microprocessor is configured to determine the water pressure within the flush valve measured by the at least one pressure sensor at or after a predetermined time following operation of the flush valve that is equal to or exceeding a known time required to reseal the flush valve during normal operation, compare the determined water pressure with a pressure value sufficient to reseal the flush valve during normal operation, and determine if the flush valve is worn based at least partially on the comparison. A method and apparatus is also disclosed.

FLUID MONITORING AND CONTROL SYSTEM

A fluid control device includes an electric motor mechanically connected to a fluid valve and a sensor coupled to a fluid pipe section. The sensor may be a temperature, pressure or flow rate sensor. A control device processor is configured to enter into a pre-occupancy mode when powered and never previously wirelessly connected to a remotely disposed fluid monitoring and control system. The pre-occupancy mode may close the fluid valve if at least one of the following occurs: exceeding a first preset threshold for a pressure decay test; exceeding a second preset threshold for a maximum flow rate; exceeding a third preset threshold for a maximum flow duration; exceeding a fourth preset threshold for a maximum flow volume; exceeding below a fifth preset threshold for a low temperature; exceeding above a sixth preset threshold for a high temperature; and/or exceeding above a seventh preset threshold for a high pressure. 1. A fluid control device , comprising:a fluid pipe section including a fluid inlet and a fluid outlet configured to be connectable in series to a fluid pipe;a fluid valve coupled in series within the fluid pipe section separating a fluid inlet side from a fluid outlet side, wherein the fluid inlet side corresponds to the fluid inlet of the fluid pipe section and the fluid outlet side corresponds to the fluid outlet of the fluid pipe section, the fluid valve controlling a fluid flow through the fluid pipe section;an electric motor mechanically connected to the fluid valve; a temperature sensor monitoring a temperature of the fluid flow within the fluid pipe section;', 'a pressure sensor monitoring a pressure of the fluid flow within the fluid pipe section; and/or', 'a flow rate sensor monitoring a flow rate of the fluid flow within the fluid pipe section;, 'at least one sensor coupled to the fluid pipe section, the at least one sensor comprisinga control device processor electrically connected to the electric motor and electrically connected to the at ...

INSTRUMENT REPROCESSOR AND INSTRUMENT REPROCESSING METHODS

An instrument reprocessor for cleaning, disinfecting, and/or sterilizing a medical instrument is disclosed. To reprocess instruments having one or more channels defined therein, the reprocessor can include one or more flow control systems configured to control a flow of fluid through each channel. In various embodiments, a flow control system can include a differential pressure sensor and a proportional valve for controlling the fluid flow in a channel. The reprocessor can also include, one, a fluid circulation pump which can be configured to supply the flow control systems with fluid and, two, a system for controlling the pressure of the fluid supplied to the flow control systems. The reprocessor can also include a system for supplying a metered amount of fluid to the fluid circulation system. The system can include a reservoir having a fluid height sensor to monitor the amount of fluid therein and a pump configured to supply the reservoir with fluid. 130-. (canceled)31. A pressurized fluid channel for flowing pressurized fluid , comprising:a first valve and a first pressure differential sensor, wherein the first pressure differential sensor is configured to detect a first pressure differential in the pressurized fluid flowing into the first valve, wherein a flow rate of the pressurized fluid is configured to be controlled through modulation of the first valve using an output from the first pressure differential sensor.32. The pressurized fluid channel of claim 31 , wherein the first valve comprises an inlet and an outlet and the first pressure differential sensor is positioned upstream with respect to the inlet.33. The pressurized fluid channel of claim 32 , further comprising a gauge pressure sensor positioned downstream with respect to the outlet.34. The pressurized fluid channel of claim 31 , wherein the first valve is a proportional valve.35. The pressurized fluid channel of claim 31 , wherein the pressurized fluid channel is configured for fluid communication ...

Quick dome loading pilot valve

A flow arrangement for a control valve can include a plurality of flow-control components that are movable relative to each other and that define at least part of a flow path from a pressure source to a dome of a pressure relief valve. The flow-control components can be movable relative to each other in response to system pressure to selectively increase or decrease the flow capacity of the flow path. In some cases, flow capacity can be increased or decreased during initial loading of the dome, at low pressures, or at higher pressures.

Flow rate control apparatus, storage medium storing program for flow rate control apparatus and flow rate control method

In order to keep a stable flow rate at a set flow rate value when a pressure fluctuation occurs in an upstream side of a valve, without providing an additional sensor for detecting a pressure fluctuation, a flow rate control apparatus is provided with: the valve; a flow rate sensor; a valve control part configured to control the valve so that a deviation between a set flow rate value and a measurement flow rate value is reduced, on the basis of the deviation and a set control coefficient; and a control coefficient setting part configured to set the control coefficient so that when a pressure rise occurs in the upstream side of the valve, a decreased amount in flow due to a decreased opening of the valve and an increased amount in flow due to an increased amount of a differential pressure before and after the valve, are balanced.

Dual Cartridge Temperature Control Valve

A dual cartridge temperature control valve having a self-contained, top loading bonnet cartridge and a self-contained, bottom loading seat cartridge. The control valve body may include internally configured pressure channels configured to mate with the upstream and downstream pressure channels of a control valve actuator having internally integrated pressure channels.

Electromechanical polymer pumps

A motor-less pump includes: (a) a housing having an inlet provided to allow fluid flow into the housing and an outlet provided to allow fluid flow out of the housing; (b) an elastic diaphragm positioned in the housing such that motion in the elastic diaphragm drives the fluid flows at the inlet and the outlet of the housing; and (c) one or more electromechanical polymer (EMP) actuators each being provided on a surface of the elastic diaphragm, wherein the mechanical responses to electrical stimuli applied on the EMP actuators cause the motion in the diaphragm. The EMP actuators may include one or more bimorphs.

METHOD FOR PREVENTING SPILLS RESULTING FROM PIPELINE FAILURES

A petroleum pipeline safety system for preventing contamination of an environmentally sensitive area close to a pipeline includes an upstream portion of the pipeline supplying a flow of fluid material, a crossing portion of the pipeline receiving the flow of fluid material from the upstream portion and conveying the flow of fluid material through the environmentally sensitive area to a downstream portion of the pipeline, the downstream portion, a pipeline pressure activated valve selectively capable of blocking the flow of fluid material from entering the crossing portion based upon a change in pressure within the crossing portion, and a fluid capacitor connected to the upstream portion configured to filter out a pressure spike in the upstream portion associated with the valve blocking the flow of fluid material. 1. A petroleum pipeline safety system for preventing contamination of an environmentally sensitive area close to a pipeline , the system comprising:a first portion of the pipeline including an upstream portion of the pipeline supplying a flow of fluid material;a second portion of the pipeline including a crossing portion of the pipeline, receiving the flow of fluid material from the upstream portion and conveying the flow of fluid material through the environmentally sensitive area to a downstream portion of the pipeline;a third portion of the pipeline including the downstream portion of the pipeline;a pipeline pressure activated valve selectively capable of blocking the flow of fluid material from entering the crossing portion based upon a change in pressure within the crossing portion;a flow restrictor downstream of the pipeline pressure activated valve and upstream of the crossing portion of the pipeline, wherein the flow restrictor is configured to create a lower pipeline internal pressure within the crossing portion as compared to a pipeline internal pressure within the upstream portion; anda pump downstream of the crossing portion of the pipeline.2. ...

Valve assembly

A water control device includes a valve, the valve including a valve body, the valve body including a first end and a second end, the valve body defining a transmission cavity allowing fluid communication between the first end and the second; a control mechanism located within the transmission cavity, the control mechanism arranged to provide modifiable fluid control within the valve; at least one sensor, the at least one sensor being in fluid communication with the transmission cavity; and at least one remote transmission unit in electronic communication with the sensor.

Product Dispensing System

A flow control device is disclosed. The flow control device includes a solenoid, the solenoid including an armature. Also, a piston connected to the armature. The piston includes a primary orifice. The piston having an open position and a closed position. A piston spring connected to the piston is also includes and at least one secondary orifice. The movement of the piston to the open position at least partially opens the at least one secondary orifice and the movement of the piston to the closed position at least partially closes the at least one secondary orifice. The movement of the armature actuates the piston movement and controls fluid flow from the primary orifice through the at least one secondary orifice.

Gas-lift safety valve actuated by a sensor

A valve actuator, valve, and method of actuation of a valve are disclosed. The valve actuator includes a shape memory alloy element attachable to a valve body, capable of use with a valve to cause movement of the valve between first and second positions. The valve actuator also includes a sensor located within a well and capable of detecting the presence of a fluid based on a fluid property of the fluid. The valve actuator includes a power supply electrically connected to the sensor and the shape memory alloy element, capable of applying an electric current to the shape memory alloy element in response to the sensor detecting the presence of the fluid. The electric current causes a temperature of the shape memory alloy element to increase beyond a threshold temperature at which the shape memory alloy element actuates.

Electronic flow sensor

A safety shut-off device is provided for a liquid gas system for vehicles and/or vehicle trailers, in order to avoid an inadvertent release of gas. The device includes an electromagnetic gas valve for supplying/shutting off the gas, an electronic unit for activating the electromagnetic gas valve, and a flow sensor for determining a current gas flow being discharged from a storage tank. Furthermore, the device includes an evaluation unit for comparing the current gas flow to a previous gas flow or to a gas flow which is indicated by the gas consumers and is to be expected. If, during use, the evaluation unit determines a current gas flow which differs by more than a maximum permissible rate of change from the previous gas flow or from an expected gas flow, the electromagnetic gas valve is activated via the electric unit in order to shut off the supply of gas.

AXIALLY ALIGNED ROTATIONALLY ADJUSTABLE FLOW CONTROL VALVE

A rotationally adjustable valve is disclosed whereby the user is able to control the flow of fluids from complete shutoff to maximum flow by rotating the adjustment means of the valve, said rotation being axial to the flow of the fluid. Additionally, the user is able to attach high and low pressure test probes directly to the valve, as it is rotatably adjusted, so that additional equipment is not required next to the valve. An embodiment of this invention includes the use of an adjustable Cv disk to set the maximum flow of the valve, rather than just create a simple 180° on/off, very similar to a current 90° ball valve that this device will replace. 1. A valve comprising:a valve body, an inlet end, and an outlet end, and a bore extending through the inlet end, the valve body, and the outlet end, said valve body defining a longitudinal axis of the valve;a first disk disposed within the valve body, disposed perpendicularly to the axis, said first disk have a first aperture through which fluid can flow, said first disk being rotationally fixed relative to the valve body;a second disk disposed within the bore of the valve body, disposed perpendicularly to the axis, said second disk have a second aperture through which fluid can flow, said second disk being rotatably disposed relative to the valve body;means for rotating the first disk relative to the second disk to move the first aperture into alignment with the second aperture to allow flow through the first and second apertures and to move the first aperture out of alignment with the second aperture to prevent flow through the first and second apertures; anda Venturi disposed within the body section, spaced from and proximate the first and second disks.2. The valve of claim 1 , wherein:the first disk is rotationally fixed to the valve body, and the second disk is rotatable relative to the valve body.3. The valve of claim 2 , wherein:the second disk is rotationally fixed to an end.4. The valve of claim 1 , further ...

GAS VALVE WITH OVERPRESSURE DIAGNOSTICS

This disclosure relates generally to valves, and more particularly, to gas valve assemblies. In one example, a gas valve assembly may include a valve body with one or more valves movable between an opened position and a closed position, one or more valve actuators configured to operate the valves, and one or more pressure sensors to sense a pressure within a fluid path of the valve assembly. A valve controller may receive a measure related to a sensed pressure from the one or more pressure sensor(s). The valve controller may compare the received measure related to the sensed pressure to an overpressure threshold. In the event the measure related to the sensed pressure surpasses the overpressure threshold value, the valve controller may be configured to provide a signal that indicates an overpressure event has occurred. 1. A valve assembly for controlling flow of a fuel to a combustion appliance for combustion by the combustion appliance , the valve assembly comprising:a valve body having an inlet port and an outlet port, with a fluid path extending between the inlet port and the outlet port;a first valve situated in the fluid path between the inlet port and the outlet port;a first valve actuator for selectively moving the first valve between a closed position, which closes the fluid path between the inlet port and the outlet port, and an open position;a first pressure sensor in communication with the fluid path of the valve body, the first pressure sensor sensing a first pressure of the fuel in the valve body;a valve controller physically secured relative to the valve body and in operative communication with the first pressure sensor, the valve controller comparing a measure related to the sensed first pressure of the fuel in the valve body with a first threshold value, and when the measure related to the sensed first pressure of the fuel in the valve body is found to go beyond the first threshold value, the valve controller detecting a valve event;the valve ...

Electrohydraulic Normally-Open Ventable Valve Configured to Operate in Pressure Relief Mode when Actuated

An example valve includes: (i) a pilot seat member comprising: (a) one or more channels fluidly coupled to a first port of the valve, (b) a pilot seat, and (c) a pilot sleeve portion comprising a pilot chamber and a cross-hole disposed in an exterior peripheral surface of the pilot sleeve portion; (ii) a pilot check member disposed in the pilot chamber and subjected to a biasing force of a setting spring disposed in the pilot chamber to seat the pilot check member at the pilot seat; and (iii) a solenoid actuator sleeve slidably accommodated about the exterior peripheral surface of the pilot sleeve portion of the pilot seat member, wherein the solenoid actuator sleeve includes a cross-hole disposed in an exterior peripheral surface of the solenoid actuator sleeve, wherein the cross-hole of the solenoid actuator sleeve is fluidly coupled to a second port of the valve. 1. A valve comprising:a pilot seat member comprising: (i) one or more channels fluidly coupled to a first port of the valve, (ii) a pilot seat, and (iii) a pilot chamber;a pilot check member disposed in the pilot chamber and subjected to a biasing force of a setting spring disposed in the pilot chamber to seat the pilot check member at the pilot seat; anda solenoid actuator sleeve axially movable relative to the pilot seat member, wherein:when the valve is unactuated, a first pilot flow path comprising the one or more channels of the pilot seat member is formed to fluidly couple the first port to a second port of the valve, thereby causing a piston to move and open a main flow path from the first port to the second port, andwhen the valve is actuated, the solenoid actuator sleeve moves axially, thereby: (i) blocking the first pilot flow path, and (ii) causing the piston to block the main flow path from the first port to the second port, wherein when pressure level of fluid at the first port overcomes the biasing force of the setting spring on the pilot check member, the pilot check member is unseated and ...

Systems and Methods for Reference Volume for Flow Calibration

A reference volume for use with pressure change flow rate measurement apparatus has an internal structure comprising elements with cross section and length comparable to the cross section and length of adjacent interstitial fluid regions. The reference volume may have one or more heat conduction elements exterior to and in good thermal contact with a corrosion resistant material that defines the internal fluid holding region. 1. A system for reference volume measurements , comprising:a reference volume chamber with an inlet portion and an outlet portion for a fluid through the reference volume chamber;an interior region of the reference volume chamber having a bottom wall, a ceiling wall, a central wall and a side wall, wherein the side wall and the central wall extends from the bottom wall and not conjoined with the ceiling wall, thereby making a gap for fluid movement;an exterior wall of the reference volume chamber enveloped by a heat conduction cover for providing a thermal conduction so that the temperature is affected by ambient effects for the fluid in the reference volume chamber; andthe central wall and the side wall capable of being secured with one or more sensors or programmable logic controllers (PLCs).2. The system for reference volume measurements claim 1 , as described in claim 1 , wherein the one or more sensors is a thermal sensor chosen from a group of Negative Temperature Coefficient (NTC) thermistor claim 1 , Resistance Temperature Detector (RTD) claim 1 , Thermocouple or Semiconductor-based sensors.3. The system for reference volume measurements claim 1 , as described in claim 1 , wherein the one or more sensors is a pressure sensor chosen from a group absolute pressure sensor claim 1 , gauge pressure sensor claim 1 , vacuum pressure sensor claim 1 , differential pressure sensor or sealed pressure sensor.4. The system for reference volume measurements claim 1 , as described in claim 1 , wherein the central wall has a tubular structure and ...

Integrated pressure transducer in a latching valve

A vapor purge system having a tank isolation valve and a canister vent valve, where each valve includes a latching mechanism for maintaining the valves in an open position, and a diagnostic test is performed on the purge system to prove that each of the valves are functioning correctly. Using latching valves in these applications reduces electricity draw from the battery and reduces electrical interference with integrated pressure sensors. The fuel tank is sealed by the tank isolation valve between the fuel tank and a vapor storage canister, and the canister vent valve provides sealing between the canister and the atmosphere, and controls venting of the canister. The diagnostic test is performed using the tank isolation valve and the canister vent valve under different operating conditions.

Pressure Control Using An External Trigger

A gas delivery system and associated method includes a flow channel, a control valve, a downstream pressure sensor, and a controller. The control valve controls flow of gas in the flow channel. The downstream pressure sensor, located downstream of the control valve, measures gas pressure in the flow channel. The controller has an external trigger input to receive a trigger signal applied to a shutoff valve downstream from the control valve. The controller operates in separate modes based on a state of the trigger signal. In a non-triggered mode, the controller controls pressure at the pressure sensor via the control valve in accordance with a first gain schedule. In the triggered mode, the controller controls the pressure at the pressure sensor via the control valve in accordance with a second gain schedule that is distinct from the first gain schedule.

Shut-off trim including spring loaded check valve

In accordance with the present invention, there is provided a bi-directional shut-off trim for a valve which possesses the functional attributes of a pilot operated trim and a balanced trim through the integration of a spring loaded check valve into a pilot trim. In forward flow isolation, the bi-directional shut-off trim of the present invention acts as a normal pilot operated trim. In reverse flow, the check valve of the shut-off trim opens to balance the pressure on either side of the plug thereof.

Systems and methods for controlling operation of a valve

A drive circuit is provided for controlling a solenoid valve having a solenoid coil. The drive circuit includes a first semiconductor device, a flyback circuit, and a processor. The first semiconductor is coupled in series with the coil and is controlled by a gate signal to energize the coil. The flyback circuit is in parallel with the coil and includes a series-coupled second semiconductor device and a diode. The second semiconductor is controlled by a flyback control signal to enable the flyback circuit when the first semiconductor is controlled by the gate signal to hold the valve open. The diode has a low forward voltage to slow decay of a current conducted through the coil. The processor generates the gate signal to control the first semiconductor and to reduce a duty cycle of the gate signal when the flyback circuit is enabled to reduce power consumption by the coil.

FLUID INJECTION SYSTEM

A system including a fluid injection system configured to removably couple to a mineral extraction system, wherein the fluid injection system includes a fluid injection system controller, a flow meter system coupled to the fluid injection system controller, wherein the flow meter system is configured to measure a fluid flow of a fluid through the fluid injection system, an adjustable valve configured to control the fluid flow through the fluid injection system, and a non-return valve configured to block reverse flow of the fluid through the fluid injection system, wherein the fluid injection system controller, the flow meter system, the adjustable valve, and the non-return valve are coupled to a common housing. 120-. (canceled)21. A system , comprising: a flow meter system configured to measure a fluid flow of a fluid along a flow path; and', 'a pressure measurement system configured to measure a fluid pressure along the flow path, wherein the system is configured to determine the fluid flow of the fluid along the flow path based on a measurement by the pressure measurement system., 'a measurement system, comprising22. The system of claim 21 , comprising a housing having a fluid inlet claim 21 , a fluid outlet claim 21 , and the flow path between the fluid inlet and the fluid outlet claim 21 , wherein the flow meter system is disposed in the housing along the flow path claim 21 , wherein the pressure measurement system is disposed in the housing along the flow path.23. The system of claim 22 , wherein the fluid inlet and the fluid outlet are disposed on a common side of the housing.24. The system of claim 23 , comprising an electrical connector disposed on the common side of the housing.25. The system of claim 22 , comprising an axial guide coupled to the housing claim 22 , wherein the axial guide is configured to guide the fluid inlet and the fluid outlet to removably couple with first and second mating ports in an axial direction.26. The system of claim 21 , ...

Mechanisms for processing wafer

Embodiments of mechanisms for processing a wafer are provided. A method for processing a wafer includes creating an exhaust flow in a fluid conduit assembly that is connected to a process module used for processing the wafer. The method also includes detecting the exhaust pressure in the fluid conduit assembly. The method further includes determining whether the exhaust pressure meets a set point. In addition, the method includes regulating the exhaust flow if the exhaust pressure fails to meet the set point.

FLUID MONITORING AND CONTROL SYSTEM

A fluid monitoring and control system includes a central hub having a central processor, a user interface and an input/output port. A plurality of control devices communicate with the central hub. Each control device includes a fluid pipe section including a fluid inlet and a fluid outlet. A fluid valve is coupled in series within the fluid pipe section and an electric motor is mechanically connected to the fluid valve. A temperature sensor, pressure sensor and flow rate sensor are coupled to the fluid pipe section monitoring a temperature, pressure and flow rate of the fluid flow within the fluid pipe section. A control device processor is controllably connected to the electric motor, temperature sensor, pressure sensor and flow sensor. A control device input/output port is coupled to the control device processor, the control device input/output port in communication with the input/output port of the central hub. 1. A fluid monitoring and control system , comprising:a central hub including a central processor, a user interface electronically coupled to the central processor and an input/output port electronically coupled to the central processor; and a fluid pipe section including a fluid inlet and a fluid outlet configured to be connectable in series to a fluid pipe;', 'a fluid valve coupled in series within the fluid pipe section separating a fluid inlet side from a fluid outlet side, wherein the fluid inlet side corresponds to the fluid inlet of the fluid pipe section and the fluid outlet side corresponds to the fluid outlet of the fluid pipe section, the fluid valve controlling a fluid flow through the fluid pipe section;', 'an electric motor mechanically connected to the fluid valve;', 'a temperature sensor coupled to the fluid pipe section monitoring a temperature of the fluid flow within the fluid pipe section;', 'a pressure sensor coupled to the fluid pipe section monitoring a pressure of the fluid flow within the fluid pipe section, wherein the pressure ...

Pressurized Vapor Cycle Liquid Distillation

Embodiments of the invention are directed toward a novel pressurized vapor cycle for distilling liquids. In some embodiments of the invention, a liquid purification system is revealed, including the elements of an input for receiving untreated liquid, a vaporizer coupled to the input for transforming the liquid to vapor, a head chamber for collecting the vapor, a vapor pump with an internal drive shaft and an eccentric rotor with a rotatable housing for compressing vapor, and a condenser in communication with the vapor pump for transforming the compressed vapor into a distilled product. Other embodiments of the invention are directed toward heat management, and other process enhancements for making the system especially efficient.

Method and Apparatus for Controlling Gas Flow via a Gas Shut-Off Valve Assembly

The present invention comprises a method and apparatus for controlling gas flow via a gas shut-off valve assembly. In at least one embodiment, the assembly is configured to drive its shut-off valve from an open position to a closed position, in response to detecting a valve closure condition. The assembly in one or more embodiments operates as an intelligent node in an AMR network, and it interprets a received closure command as a closure condition. Additionally, or alternatively, the assembly detects abnormal operating conditions as the closure condition. Advantageously, the assembly performs initial closure verification, based on detecting movement of the valve into the closed position, and performs subsequent closure verification, based on monitoring downstream gas pressure. In the same or other embodiments, the assembly provides enhanced stand-alone reliability and safety by incorporating one or more valve clearing/cleaning routines into its operations.

Smart Actuator For Valve

A system and method of monitoring and controlling the open and close states of a manifold diaphragm type valve includes using an actuator mechanism with feedback control. A pressure transducer and/or force gauge located on the contact end of the actuator mechanism monitors the pressure and/or force applied to the end of the actuator mechanism. A controller instructs the actuator mechanism to move forward or backward an appropriate distance based on the monitored pressure and/or force. Temperature and pressure changes in the system and material changes to the diaphragm are sensed immediately and positioning correction is applied to the actuator in real-time, thereby maintaining the same valve state while monitoring pressure separately. The linear actuator functions as a ‘smart’ actuator, capable of fine tune adjustments without additional outside monitoring and providing a more accurate and reliable method of closing the valve in a dynamic environment. 1. A valve actuator system adapted to open and close a valve , comprising an orifice closing member , positioned within a manifold and adjacent a fluid pathway through which fluid flows in a dialysis system , said valve actuator mechanism comprising:a displacement member adapted to being displaced linearly and having a contact end wherein said contact end is positioned proximate to said orifice closing member when said valve is in said open state;a motor for moving said displacement member;at least one pressure sensor positioned on said contact end for sensing pressure generated when said contact end is in physical communication with said orifice closing member and for relaying data based on said sensed pressure; anda controller for receiving the sensed pressure from the at least one pressure sensor, wherein said controller comprises a memory having stored therein a plurality of programmatic instructions that, when executed by a processing unit, compare said sensed pressure to a pre-determined value stored in said ...

Systems and methods for detecting a water leak

Systems and methods is described herein for detecting a water leak. In an example, a method for detecting a water leak can include receiving at a water monitoring system (WMS) one or more radio-frequency (RF) signals, converting the one or more RF signals to a direct-current (DC) voltage, storing the DC voltage at a storage element, configuring the WMS to monitor a water source for water, generating a control valve signal in response to detecting the water, and providing the control valve signal to a shutoff valve to cause the shutoff valve to cut-off the flow of the water to the water source.

Flow rate range variable type flow rate control apparatus

A pressure type flow rate control apparatus is provided wherein flow rate of fluid passing through an orifice is computed as Qc=KP1 (where K is a proportionality constant) or as Qc=KP2 m (P1−P2) n (where K is a proportionality constant, m and n constants) by using orifice upstream side pressure P1 and/or orifice downstream side pressure P2. A fluid passage between the downstream side of a control valve and a fluid supply pipe of the pressure type flow rate control apparatus comprises at least 2 fluid passages in parallel, and orifices having different flow rate characteristics are provided for each of these fluid passages, wherein fluid in a small flow quantity area flows to one orifice for flow control of fluid in the small flow quantity area, while fluid in a large flow quantity area flows to the other orifice for flow control of fluid in the large flow quantity area.

Product Dispensing System

A flow control device is disclosed. The flow control device includes a solenoid, the solenoid including an armature. Also, a piston connected to the armature. The piston includes a primary orifice. The piston having an open position and a closed position. A piston spring connected to the piston is also includes and at least one secondary orifice. The movement of the piston to the open position at least partially opens the at least one secondary orifice and the movement of the piston to the closed position at least partially closes the at least one secondary orifice. The movement of the armature actuates the piston movement and controls fluid flow from the primary orifice through the at least one secondary orifice. 1. A product dispensing system comprising:a flow control device configured to regulate a first ingredient;a pump module configured to be coupled to a supply of a second ingredient;a controller configured to provide a first control signal to the flow control device for controlling the supply of a first quantity of the first ingredient and to provide a second control signal to the pump module for controlling the supply of a first quantity of the second ingredient.2. The product dispensing system of claim 1 , wherein the flow control device includes:a flow measuring device configured to provide a feedback signal based upon a volume of the first ingredient flowing within the flow control device; anda variable line impedance configured to regulate the first ingredient based upon, at least in part, the feedback signal of the flow measuring device and the first control signal provided by the controller.3. The product dispensing system of claim 2 , wherein the flow measuring device includes a positive displacement flow measuring device.4. The product dispensing system of claim 3 , wherein the positive displacement flow measuring device includes a gear-based positive displacement flow measuring device.5. The product dispensing system of claim 2 , wherein the ...

Solenoid valve

A solenoid valve ( 1 ) is described comprising a first port ( 2 ), a second port ( 3 ), a valve element ( 4 ) and a valve seat ( 5 ) arranged between said first port ( 2 ) and said second port ( 3 ), a coil ( 12 ) and a yoke arrangement ( 14 - 16 ), said coil ( 12 ) being magnetically linked to said yoke arrangement ( 14 - 16 ), said yoke arrangement ( 14 - 16 ) having a movable armature ( 16 ). In such a solenoid valve the generation of noise should be kept low. To this end said valve element ( 4 ) is driven by a pressure difference between a first pressure on a first side ( 6 ) of said valve element ( 4 ) and a second pressure on a second side ( 7 ) of said valve element ( 4 ), at least one of said first pressure and said second pressure being controlled by means of said armature ( 16 ), wherein said armature ( 16 ) comprises a first front face ( 18 ) at a first end and a second front face ( 19 ) at a second end opposite said first end, said first front face ( 18 ) and said second front face ( 19 ) being connected by a first flow path ( 21 ), said first flow path having first throttling means for keeping low a flow of a fluid flowing through said first flow path ( 21 ).

Fluid control valve system and methods

A diaphragm-type control valve having a diaphragm and a valve body is provided preferably for use in the separation of and fluid control between a fluid source and a pressurized gas volume. The diaphragm element and a port in the body together form an intermediate chamber that eliminates the need for a check-valve downstream of the valve. In one preferred embodiment, an inner surface of the valve body defines a chamber having an inlet and an outlet in communication with the chamber, and an elongated seat member defining a groove in communication with the port. A diaphragm member having upper and lower surfaces is disposed within the chamber. The lower surface preferably includes a pair of spaced apart elongated members defining a channel therebetween. The diaphragm member engages the seat member placing the channel in communication with the groove to define an air seat in communication with the port.

Fluid Leak Detector With Thermal Dispersion Flow Meter and Chronometric Monitor

A non-invasive thermal dispersion flow meter with chronometric monitor for fluid leak detection includes a heater, an ambient temperature sensor and a flow rate sensor which are configured to sense the temperature of a fluid in a conduit, and then monitor the flow of that fluid through the conduit. The fluid flow sensor is incorporated into a 1. A fluid leak detector comprising:a fluid flow meter configured to monitor a fluid flow rate of a fluid; andmonitoring the fluid flow rate and increasing a timeout counter when the fluid flow rate is above a trip level fluid flow rate and resetting the timeout counter to zero when the fluid flow rate is below the trip level fluid flow rate, wherein a leak is detected when the timeout counter exceeds a timeout value.2. The fluid leak detector of further comprising a valve claim 1 , wherein the valve is configured to close when the timeout counter exceeds the timeout value.3. The fluid leak detector of further comprising a controller claim 1 , wherein the controller is configured to send an output signal when the timeout counter exceeds the timeout value.4. The fluid leak detector of further comprising a valve claim 3 , wherein the output signal from the controller closes the valve.5. The fluid leak detector of further comprising a display claim 4 , wherein the output signal from the controller is sent to the display to notify of a detected leak.6. A fluid leak detector comprising:a fluid flow meter configured to monitor a fluid flow rate of a fluid within a conduit; andmonitoring the fluid flow rate and increasing a timeout counter when the fluid flow rate is above a trip level fluid flow rate and resetting the timeout counter to zero when the fluid flow rate is below the trip level fluid flow rate, wherein a leak is detected when the timeout counter exceeds a timeout value.7. The fluid leak detector of further comprising a valve attached to an inlet of the conduit claim 6 , wherein the valve is configured to close when the ...

Electronically-Controlled Compressed Air System

A compressed air system may comprise an air compressor configured to generate compressed air, a reservoir configured to store the compressed air, a reservoir pressure sensor configured to monitor an actual reservoir pressure of the compressed air stored in the reservoir, an outlet valve configured to regulate a flow of the compressed air out of the reservoir, and an outlet electronic actuator configured to adjust a position of the outlet valve. The compressed air system may further comprise an electronic control module (ECM) configured to transmit a command to the outlet electronic actuator to cause the outlet electronic actuator to open the outlet valve when the actual reservoir pressure is above a target reservoir pressure, and transmit a command to the electronic actuator to cause the electronic actuator to close the outlet valve when the actual reservoir pressure is below the target reservoir pressure.

APPARATUS, SYSTEMS AND METHOD FOR COLLECTING AND RECLAIMING ANAESTHETIC AGENTS AND FOR REMOVING NITROUS OXIDE FROM EXHAUST GASES

A system for collecting an anaesthetic agent, having at least one anaesthetic gas scavenging system (AGSS) for receiving exhaust gas from a plurality of sources, the exhaust gas including the anaesthetic agent to be collected, each AGSS comprising at least one power source for providing suction of the exhaust gas from the plurality of sources under negative pressure, and a central collection system for receiving the exhaust gas, the central collection system comprising at least one collector for collecting the anaesthetic agent from the exhaust gas, wherein the at least one collector is configured to adsorb the anaesthetic agent from the exhaust gas. The central collection system may be configured to received the exhaust gases from the at least one AGSS, with the central collection system being located downstream of the at least one AGSS. 1. A system for collecting an anaesthetic agent , the system comprising:at least one anaesthetic gas scavenging system (AGSS) for receiving exhaust gas from a plurality of sources, the exhaust gas including the anaesthetic agent to be collected, each AGSS comprising at least one power source for providing suction of the exhaust gas from the plurality of sources under negative pressure; anda central collection system for receiving the exhaust gas, the central collection system comprising at least one collector for collecting the anaesthetic agent from the exhaust gas, wherein the at least one collector is configured to adsorb the anaesthetic agent from the exhaust gas.2. The system of claim 1 , wherein the at least one power source outputs the exhaust gas under positive pressure such that the collector collects the anaesthetic agent under positive pressure.3. The system of claim 1 , wherein the at least one power source comprises at least one vacuum pump.4. The system of claim 1 , wherein the at least one power source comprises a plurality of power sources.5. The system of claim 4 , wherein the plurality of power sources comprises ...

Variable suction device for an a/c compressor to improve nvh by varying the suction inlet flow area

A variable displacement compressor for an air conditioning system includes a suction throttle valve. The suction throttle valve includes a housing with a cavity formed therein. A first piston reciprocatingly disposed in the cavity is configured to cause a variable restriction of a flow of refrigerant through a suction inlet formed in the housing. The suction inlet provides fluid communication between a suction port and the cavity formed in the housing. The refrigerant flows through the suction port in a direction that is not parallel to a direction the piston reciprocates within the cavity. The suction throttle valve is configured to increase the restriction in the suction inlet when a crankcase pressure associated with the variable displacement compression is increased relative to an external suction pressure of the refrigerant entering the suction throttle valve.

Valvetrain oil control system and oil control valve

A hydraulic control system includes an oil control valve to control oil flow within a valve train. The control valve varies the flow rate to actuate an engine component from a first position to a second position based upon fluid pressure from the control valve. Varying the flow rate through the control valve includes increasing the flow rate through the control valve to increase the pressure to a first level to actuate the engine component to the first position. After the engine component is actuated, the flow rate through the control valve is maintained at a level sufficient to maintain the engine component in the first position. To actuate the engine component to the second position the flow rate through the control valve is then decreased. The fluid flow rate through the control valve is then maintained at a level sufficient to maintain the engine component in the second position.

Steam valve control device and steam turbine system

A steam valve control device of this embodiment controls a steam valve. The steam valve has: an upper cover in whose through hole a bush is installed; and a valve rod which is installed so as to penetrate through the through hole of the upper cover via the bush. The valve rod has a contact surface which is formed so as to come into mechanical contact with the bush when the steam valve is opened to a maximum opening degree. The steam valve control device has a control part. When a governor free operation is performed, the control part controls the steam valve by setting a limited opening degree limited to be smaller than the maximum opening degree as an upper limit. When a load limiter operation is performed, the control part controls the steam valve by setting the maximum opening degree as the upper limit

System and method to monitor characteristics of an operating fluid in a process line

A system that provides localized monitoring of characteristics of instrument gas that a valve assembly uses to modulate the flow of a working fluid. The system includes components that generate an output in response to, for example, particulates, humidity, temperature, and other characteristics of the instrument gas. Processing of data and information in the output can help to diagnose changes in the characteristics of the instrument gas. This diagnosis is useful to predict a time frame during which the valve assembly and components associated therewith might fail and/or require maintenance before the valve assembly manifests significant problem that are detrimental to a process line.

Method for preventing spills resulting from pipeline failures

A petroleum pipeline safety system for preventing contamination of an environmentally sensitive area close to a pipeline includes an upstream portion of the pipeline supplying a flow of fluid material, a crossing portion of the pipeline receiving the flow of fluid material from the upstream portion and conveying the flow of fluid material through the environmentally sensitive area to a downstream portion of the pipeline, the downstream portion, a pipeline pressure activated valve selectively capable of blocking the flow of fluid material from entering the crossing portion based upon a change in pressure within the crossing portion, and a fluid capacitor connected to the upstream portion configured to filter out a pressure spike in the upstream portion associated with the valve blocking the flow of fluid material.

Vacuum valve and valve control device

A vacuum valve for driving a valve body arranged facing a valve opening up and down relative to the valve opening to perform valve opening/closing operation, comprises: a first up-down driver configured to drive the valve body up and down with a first minimum drivable amount; and a second up-down driver configured to drive the valve body up and down with a second minimum drivable amount smaller than the first minimum drivable amount.

Pressure regulator and polishing apparatus having the pressure regulator

A pressure regulator capable of improving both stability of pressure and responsiveness to an input signal is disclosed. A PID controller is configured to stop producing a corrective command value from a point in time when a pressure command value has changed until a PID control starting point and to produce the corrective command value after the PID control starting point. A regulator controller is configured to control operation of a pressure regulation valve so as to eliminate a difference between the pressure command value and a first pressure value from the point in time when the pressure command value has changed until the PID control starting point, and to control the operation of the pressure regulation valve so as to eliminate a difference between the corrective command value and the first pressure value after the PID control starting point.

Differential pressure type flowmeter and flow controller provided with the same

There is provided a differential pressure type flowmeter that includes an orifice provided in a main flow channel, a first pressure sensor configured to detect pressure of fluid on an upstream side of the orifice, a second pressure sensor configured to detect pressure of fluid on a downstream side of the orifice, a first pressure introduction flow channel configured to guide the fluid on the upstream side of the orifice to the first pressure sensor, and a second pressure introduction flow channel configured to guide the fluid on the downstream side of the orifice to the second pressure sensor, wherein a flow channel length and a flow channel diameter of the first pressure introduction flow channel coincide with those of the second pressure introduction flow channel, respectively, and a ratio of the flow channel length to the flow channel diameter is not less than 20 times and not more than 30 times.

Pneumatic inflator for automatically inflating inflatable articles to a desired pressure

Various embodiments of the present disclosure provide a pneumatic inflator for automatically inflating inflatable articles, such as dunnage bags, to a desired pressure. Generally, once activated, the pneumatic inflator of the present disclosure inflates an inflatable article via a compressed air source until the air pressure inside the inflatable article reaches an operator-selected desired pressure. Thereafter, the pneumatic inflator automatically stops inflating the inflatable article. In various embodiments, the pneumatic inflator also includes a manual shut-off that, when activated while the pneumatic inflator is inflating the inflatable article, causes the pneumatic inflator to stop inflating the inflatable article. The pneumatic inflator of the present disclosure thus enables automatic inflation of inflatable articles to particular, operated-selected desired pressures with limited operator input.

Float apparatus

A float valve apparatus is provided for regulating the level of fluid within a tank. The apparatus may include a housing having one or more inlet ports and an outlet port that are each fluidly connected via a channel disposed within the housing. A float disposed within the housing may move relative to the housing between a first position and a second position when a fluid level in the tank reaches a preset level. A shaft may extend from the float into a chamber, and as the float moves from the first position to the second position, fluid may enter a chamber and bias the float further upward. In some examples, the shaft is further configured to increasingly obstruct the flow of fluid in the channel as the float moves from the first position to the second position.

Valve, In Particular A Pressure Regulating Valve Or Pressure Limiting Valve

The invention relates to a valve ( 1 ), in particular a pressure regulating valve or a pressure limiting valve four controlling a pressure of a medium ( 3 ) that flows through the valve ( 1 ), comprising a main stage ( 5 ) and a pilot stage ( 7 ) which actuates the main stage ( 5 ), which is actuated against the effect of a restating device ( 11 ) by means of an energizable actuating device ( 9 ), and which has a pressure release stage ( 13 ) of the valve ( 1 ). The pressure release stage ( 13 ) has a surface area modification device ( 15 ).

MANIPULATION OF MICROFLUIDIC DROPLETS

The invention provides methods for assessing one or more predetermined characteristics or properties of a microfluidic droplet within a microfluidic channel, and regulating one or more fluid flow rates within that channel to selectively alter the predetermined microdroplet characteristic or property using a feedback control. 120-. (canceled)21. A system for controlling droplet flow rate , the system comprising:a microfluidic device comprising a microfluidic channel and a merge zone, the microfluidic channel comprising a first stream of droplets and a second stream of droplets;a sensor configured to detect flow rates of the first and second streams of droplets in the microfluidic channel; anda controller operably connected to the sensor, the controller configured to adjust the flow rates relative to each other to cause the first stream of droplets to intercalate with the second stream of droplet in the merge zone.22. The system of claim 21 , wherein the controller is configured to adjust the flow rates by adjusting a pressure of one or more fluids.23. The system of claim 21 , wherein the first and second streams of droplets comprise droplets differing in size claim 21 , color claim 21 , refractive index claim 21 , or extinction coefficient.24. The system of claim 21 , wherein the first and second streams of droplets contain different biological claim 21 , biochemical claim 21 , or chemical entities.25. The system of claim 21 , wherein a frequency ratio of the first stream of droplets to the second stream of droplets is selected from the group consisting of 1:1 claim 21 , 1:2 claim 21 , 1:3 claim 21 , 1:4 claim 21 , 1:5 claim 21 , 1:6 claim 21 , 1:7 claim 21 , 1:8 claim 21 , 1:9 claim 21 , and 1:10.26. The system of claim 25 , wherein the frequency ratio of the first stream of droplets to the second stream of droplets is 1:1.27. The system of claim 21 , wherein droplets of the first stream have a maximum cross-sectional dimension of less than about 100 microns.28. The ...

FLOW CONTROL SWITCH VALVE

A flow regulating switch valve includes a valve core that includes a switch assembly configured to drive a diaphragm assembly to open or close a water outlet, and also includes a flow regulating assembly that comprises a rotating ring, a sliding block, and a magnet. A control key is configured to control the switch assembly. The rotating ring is connected to the control key and includes an inclined plane that transitions from high to low and is configured to drive the sliding block to slide up and down such that the sliding block drives the magnet to move up and down. The magnet is configured to control the diaphragm assembly to regulate a size of the water outlet. 1. A flow regulating assembly , comprising:a sliding block; a ring body; and', 'an inclined plane on a lower surface of the ring body, the inclined plane transitioning from a high end to a low end that is axially offset from the high end, the inclined plane engaged with the sliding block such that rotation of the ring body relative to the sliding block causes axial movement of the sliding block; and, 'a rotating ring, comprisinga valve cap engaged with the rotating ring and configured to substantially prevent axial movement of the ring body.2. The flow regulating assembly of claim 1 , wherein the sliding block includes a convex strip extending along an axial direction claim 1 , and wherein an upper surface of the convex strip is engaged with the inclined plane.3. The flow regulating assembly of claim 2 , wherein the inclined plane is one of a plurality of inclined planes on the lower surface of the ring body claim 2 , wherein the convex strip is one of a plurality of convex strips of the sliding block claim 2 , and wherein each one of the plurality of convex strips is engaged with a respective one of the plurality of inclined planes.4. The flow regulating assembly of claim 1 , wherein the valve cap includes a guide table claim 1 , wherein the ring body includes a guide bulge extending axially away from ...

System and method for feed-forward valve test compensation

A system includes a controller including a processor configured to execute a program stored in a memory of the controller to generate and transmit a first output comprising a total flow demand value to a plurality of valves communicatively coupled to the controller. Each of the plurality of valves is configured to receive a respective portion of the total flow demand value. The processor is configured to receive an input indicative of a decoupling of a first valve of the plurality of valves and to generate a second output based at least in part on the first output and a first operational characteristic of the first valve. The second output is configured to vary a second operational characteristic of a second valve of the plurality of valves to maintain the total flow demand value.

FROZEN/CHILLED FLUID FOR PIPELINES AND FOR STORAGE FACILITIES

Methods for managing a hazardous fluid within a pipeline and within a storage facility, and in particular for managing a potential or actual leak of the hazardous fluid. Such methods include the detection of such an event by one or more sensors, and the containment and the mitigation of the event. 1120-. (canceled)121. A method of managing a hazardous fluid in a pipeline , the method comprising: [ (A) an inlet end and an outlet end;', '(B) a first valve, disposed at the inlet end, for controlling the entry of fluid into the first element;', '(C) a second valve, disposed at the outlet end, for controlling the exit of fluid from the first element; and, '(i) a first hollow pipeline element having;'}, (A) an inlet end coupled to the outlet end of the first element and located downstream from the first element, and having an outlet end, and', '(B) a downstream pump, coupled to the second element;, '(ii) a second hollow pipeline element, having'}], '(a) providing;'}(b) detecting, by a sensor, an enhanced likelihood of escape of a hazardous fluid from the first element, the enhanced likelihood exceeding a threshold value;(c) upon the detection, providing, by the sensor, signal representing enhanced likelihood to a control device;(d) receiving, by the control device, the signal;(e) upon receiving the signal, providing, by the control device, a closing signal to at least one of the first valve and the second valve wherein the closing signal represents a command to close the respective valve;(f) upon closing the at least one valve, activating, by the control device, the downstream pump; and(g) pumping the hazardous fluid downstream by the pump.122. The method of further comprising cooling the hazardous fluid by a cooling apparatus.123. The method of claim 121 , wherein said step (g) comprises draining the second element by the downstream pump.124. The method of claim 121 , wherein the first element comprises a storage tank.125. The method of claim 121 , wherein the first ...

AUTOMATIC SHUT OFF VALVE

A device is disclosed comprising an electrically actuated flow control element and control circuits electrically coupled to the electrically actuated flow control element. The control circuits can receive wireless control signals from a displaced electronic device and responsive thereto, transmit electrical signals to the electrically actuated flow control element to actuate the electrically actuated flow control element from a current flow state to an alternate flow state. 1. A device comprising:an electrically actuated flow control element; andcontrol circuits electrically coupled to the electrically actuated flow control element,wherein the control circuits receive wireless control signals from a displaced electronic device and responsive thereto, transmit electrical signals to the electrically actuated flow control element to actuate the electrically actuated flow control element from a current flow state to an alternate flow state.2. The device of further comprising a flow condition sensor electrically coupled to the control circuits claim 1 ,wherein the control circuits receive information regarding flow of a fluid though the electrically actuated flow control element from the flow condition sensor and transmit the information to the displaced electronic device, andwherein the control signals from the displaced electronic device are responsive to the information.3. The device of wherein the flow condition sensor is a flow meter and the information includes a flow rate of the fluid through the electrically actuated flow control element.4. The device of wherein the flow condition sensor is a pressure sensor and the information includes a pressure differential between an inflow end and an outflow end of the device.5. The device of wherein the control circuits throttle the electrically actuated flow control element to measure the pressure differential between the inflow end and the outflow end of the device.6. The device of wherein the control circuits determine a ...

MANUAL CONTROL FOR ACTUATED FLUID MONITORING AND CONTROL DEVICE

A fluid control device connectable to a fluid pipe includes an electric motor mechanically connected to a fluid valve configured to open and close the fluid valve. A manual motor disengagement knob is at least partially accessible to a user and mechanically connected to the fluid valve. The knob is configured to manually disengage the mechanical connection between the electric motor and the fluid valve while still engaging the fluid valve allowing the user to manually close or open the fluid valve without the assistance or interference of the electric motor. This is accomplished by a manual over-ride primary shaft translatably connected to a clutch shaft and in turn to the fluid valve, where the shaft in a first position is mechanically connected to the electric motor and in a second position the shaft is not mechanically connected to the electric motor. 1. A fluid control device connectable in series to a fluid pipe , the fluid control device comprising:a main valve body including a fluid inlet in fluidic communication with a fluid outlet and configured to be connectable in series to the fluid pipe;a fluid valve disposed in series within the main valve body separating the fluid inlet and fluid outlet, the fluid valve controlling a fluid flow through the main valve body, wherein the fluid valve is a ball valve;an electric motor mechanically connected to the fluid valve, the electric motor configured to open and close the fluid valve;a temperature sensor coupled to the main valve body monitoring a temperature of the fluid flow within the main valve body;a pressure sensor coupled to the main valve body monitoring a pressure of the fluid flow within the main valve body;a flow rate sensor coupled to the main valve body monitoring a flow rate of the fluid flow within the main valve body;a fluid control device processor in electrical communication with the electric motor, the temperature sensor, the pressure sensor and the flow sensor;a fluid control device input/output ...

Flow rate control device

A mass flow controller comprises a flow rate measuring part that measures a flow rate of a fluid flowing in a flow channel and outputs a measured flow rate value, a control valve, a valve control part that controls an opening degree of the control valve based on an entirely-close command to entirely close the control valve compulsorily or a set flow rate value set as a target value, and an external output part that outputs an external output flow rate value based on the measured flow rate value to the outside, and at a time when the valve control part receives the entirely close command or zero as the set flow rate value, the external output part outputs zero as the external output flow rate value, irrespective of the measured flow rate value.

Method and apparatus for gas flow control

A method and apparatus for self-calibrating control of gas flow. The gas flow rate is initially set by controlling, to a high degree of precision, the amount of opening of a flow restriction, where the design of the apparatus containing the flow restriction lends itself to achieving high precision. The gas flow rate is then measured by a pressure rate-of-drop upstream of the flow restriction, and the amount of flow restriction opening is adjusted, if need be, to obtain exactly the desired flow.

Axially aligned rotationally adjustable flow control valve

A rotationally adjustable valve is disclosed whereby the user is able to control the flow of fluids from complete shutoff to maximum flow by rotating the adjustment means of the valve, said rotation being axial to the flow of the fluid. Additionally, the user is able to attach high and low pressure test probes directly to the valve, as it is rotatably adjusted, so that additional equipment is not required next to the valve. An embodiment of this invention includes the use of an adjustable Cv disk to set the maximum flow of the valve, rather than just create a simple 180° on/off, very similar to a current 90° ball valve that this device will replace.

Liquid supplying device and liquid supplying method

The present invention provides a liquid supplying device that can determine whether a CLC can be used appropriately. A liquid supplying device for supplying a liquid from a liquid source to a cleaning device is provided. The liquid supplying device includes a flow rate control device that measures a flow rate of a liquid from the liquid source and controls the flow rate based on the measured value, an IN-side pressure gauge provided between the liquid source and the flow rate control device and an OUT-side pressure gauge provided between the flow rate control device and the cleaning device.

Low Pressure Pilot Operated Relief Valve

Embodiments of the invention provide a relief valve body arranged between an inlet and an outlet. The relief valve body includes an expanding nozzle extending along an axis, a first ramp extending in an arcuate path from an apex to a first terminal point, and a second ramp extending in an arcuate path from the apex to a second terminal point. The first ramp and the second ramp define an expanding flow area for a fluid flow between the inlet and the outlet. 1. A relief valve body arranged between an inlet and an outlet , the relief valve body comprising:an expanding nozzle extending along an axis;a first ramp extending in an arcuate path from an apex to a first terminal point; anda second ramp extending in an arcuate path from the apex to a second terminal point, the first ramp and the second ramp define an expanding flow area for a fluid flow between the inlet and the outlet.2. The relief valve body of claim 1 , wherein the expanding nozzle includes a nozzle bulb claim 1 , a nozzle exterior surface claim 1 , and a valve seat.3. The relief valve body of claim 2 , wherein the nozzle bulb defines a substantially protrudent shape that protrudes away from the axis.4. The relief valve body of claim 2 , wherein the first ramp and the second ramp wrap around opposite sides of the nozzle exterior surface.5. The relief valve body of claim 1 , further comprising a redirecting pallet arranged downstream from the inlet.6. The relief valve body of claim 1 , wherein the first terminal point and the second terminal point are arranged between the axis and the outlet.7. The relief valve body of claim 1 , further comprising an arced portion and a flat portion adjacent to the outlet.8. A relief valve body arranged between an inlet and an outlet claim 1 , the relief valve body comprising:an expanding nozzle extending along an axis;an interior surface arranged downstream of the expanding nozzle and including a first ramped portion and a second ramped portion, the first and second ramped ...

Integral filter and regulator for valve

A bleed air control valve includes a pneumatic actuator operable to drive rotation of a closure disk, a connecting rod, a shaft, and an actuator fluid supply passage. The pneumatic actuator includes an integral filter and pressure regulator unit disposed in line with the actuator fluid supply passage. The actuator fluid supply passage provides communication between an inlet side of the flow control duct and at least one pressure chamber. The integral filter and pressure regulator unit has a cylindrical regulator cavity in selective communication with a cylindrical vent cavity. Filter media is secured to the pressure regulator unit and disposed across at least one of a regulator inlet orifice and a regulator outlet orifice. A regulator nozzle has at least one regulator port providing selective communication between a vent cavity and a regulator cavity.

METHOD AND APPARATUS FOR SELF VERIFICATION OF PRESSURED BASED MASS FLOW CONTROLLERS

A mass flow control system can be self verified for its accuracy when controlling a flow to a process. The system comprises: a control valve for controlling the flow of fluid through the system as a function of a control signal; a controller for generating the control signal as a function of measured flow of fluid through the system and a targeted flow set point; a pressure sensor for measuring the controlling fluid pressure for use in measuring and verifying the flow rate; and a source of fluid for providing a known volume of fluid for use in verifying the system accuracy anytime between steps of the flow control process. 1. A method of verifying the accuracy of a mass flow control system when controlling a flow to a process , the method comprising:controlling the flow of fluid through the system as a function of a control signal;generating the control signal as a function of measured flow of fluid through the system and a set point; andproviding a known volume of fluid for use in calibrating the system anytime between steps of the flow control process.2. A method according to claim 1 , wherein controlling the flow of fluid includes controlling the flow of fluid through a flow restrictor so as to create choked flow conditions.3. A method according to claim 2 , wherein controlling the flow through a flow restrictor includes controlling the flow through an orifice whose cross sectional area is adjustable.4. A method according to claim 2 , wherein controlling the flow through a flow restrictor includes controlling the flow through a second control valve for providing an adjustable opening that defines the flow restrictor.5. A method according to claim 1 , further including providing a pressure measurement signal representative of the measured pressure of fluid in the system; and providing a temperature measurement signal representative of the measured temperature of fluid in the system.6. A method according to claim 5 , further including determining the measured flow ...

Method and Apparatus for Pulse Gas Delivery Using an External Pressure Trigger

A fluid control system and associated method for pulse delivery of a fluid includes a shutoff valve and a mass flow controller (MFC) upstream of the shutoff valve. The MFC includes a flow channel, a control valve to control flow of fluid in the flow channel, a flow sensor to measure flow rate in the flow channel, and a controller having a valve input from the shutoff valve indicating opening of the shutoff valve. The controller is configured to respond to the valve input to control flow of fluid through the control valve to initiate and terminate a pulse of fluid from the flow channel to the shutoff valve to control a mass of fluid delivered during the pulse of fluid. The valve input can be a pressure signal, and the MFC can include a pressure sensor to sense the pressure signal. 1. A mass flow controller (MFC) for pulse delivery of a fluid , the MFC comprising:a flow channel;a control valve to control flow of fluid in the flow channel;a flow sensor to measure flow rate in the flow channel; and{'sub': SP', 'SP', 'SP, 'a controller having an input and being configured to calculate a mole set point nfrom a flow set point Qand a pulse-on period Δt, the controller configured to respond to the input to control flow of fluid through the control valve to initiate and terminate a pulse of fluid from the flow channel to control a mass of fluid delivered during the pulse of fluid, the pulse of fluid being terminated in response to the calculated mole set point n.'}2. The MFC of claim 1 , wherein the controller controls the flow of fluid through the control valve based on feedback from the flow sensor during the pulse of fluid.3. The MFC of claim 1 , wherein the input is a pressure signal claim 1 , and wherein the MFC includes a pressure sensor to sense the pressure signal.4. The MFC of claim 3 , wherein the pressure sensor receives the pressure signal via a tap into a pneumatic line claim 3 , pressure in the pneumatic line opening and closing a shutoff valve.5. The MFC of ...

Frozen/chilled fluid for pipelines and for storage facilities

Methods of, and apparatus for, storing and transporting a hazardous fluid, such as a combustible fuel, include methods and means, respectively, for: (a) treating the fluid to reduce its hazardous condition; (b) storing and/or transporting the treated fluid in such a manner that the risk of its hazardous condition remains reduced; (c) thereafter retreating the fluid to restore it to its original hazardous condition so that the fluid may be used in its restored condition. The hazardous fluid may be treated by adding a substance to, or removing a substance from, the fluid, or by changing the state of the fluid. For example, if the fluid is a fuel, it may be treated by cooling it to near or below its freezing temperature to reduce its combustibility, volatility, explosivity and/or ease of ignition.

MANIPULATION OF MICROFLUIDIC DROPLETS

The invention provides methods for assessing one or more predetermined characteristics or properties of a microfluidic droplet within a microfluidic channel, and regulating one or more fluid flow rates within that channel to selectively alter the predetermined microdroplet characteristic or property using a feedback control. 120-. (canceled)21. A method for controlling droplet flow rate , the method comprising:providing a first stream of droplets moving in a microfluidic channel at a first flow rate, the first stream of droplets comprising droplets of a first species;providing a second stream of droplets moving within the microfluidic channel at a second flow rate, the second stream of droplets comprising droplets of a second species;using a sensor to detect the first flow rate and the second flow rate;receiving with a feedback controller the first and second flow rates; andadjusting with the feedback controller the first and second flow rates to provide a desired frequency ratio of the first species to the second species of droplets to coordinate a rate of delivery of the droplets of the first species and the droplets of the second species to a merge zone in the microfluidic channel, thereby causing merging of droplets of the first species with droplets of the second species.22. The method of claim 21 , wherein the feedback controller adjusts the first flow rate or the second flow rate by adjusting a flow rate of one or more fluids.23. The method of claim 21 , wherein the first and second species of droplets differ in size claim 21 , color claim 21 , refractive index claim 21 , or extinction coefficient.24. The method of claim 21 , wherein the first and second species of droplets contain a different biological claim 21 , biochemical claim 21 , or chemical entity.25. The method of claim 21 , wherein the desired frequency ratio of the first plurality of droplets to the second plurality of droplets is selected from the group consisting of 1:1 claim 21 , 1:2 claim 21 , ...

Leak detection for aircraft

Disclosed is a sensor system for retrofitting a water supply of an airplane to detect leakage. The system includes a housing having a first band with an inner diameter sized to receive a necked portion of a valve for consumer access to the water supply. The system includes a first transducer disposed on the first band operable to provide a position measurement corresponding to a relative position between a head of the valve and the necked portion. The system includes a second transducer operable to provide a pressure measurement corresponding to a pressure of a compressed gas in a water tank of the water supply. The system includes a controller having input channels operable to receive the position measurement and the pressure measurement. The controller is operable to indicate a leak condition.

METHOD AND SYSTEMS FOR MICROFLUIDIC LOGIC DEVICES

A microfluidic system includes a substrate, a set of input ports coupled to the substrate, and a set of output ports coupled to the substrate. The microfluidic system also includes a microfluidic processing system coupled to the substrate and including a plurality of processing sites. The microfluidic processing system is coupled to the set of input ports and the set of output ports. The microfluidic system further includes one or more microfluidic logic devices coupled to the substrate and operable to control at least a portion of the microfluidic processing system.