High-low pressure responsive pilot valve structure
Реферат: 1439969 Fluid-pressure servomotor systems ACF INDUSTRIES Inc 8 Aug 1973 [25 Sept 1972] 37537/73 Heading G3P Low and high pressure responsive elements 64, 52 operate a valve 86 when a pressure outside a predetermined range is reached in a line 10, the valve disconnecting an actuator 14 from a fluid supply 18 and connecting it to a vent 44 whereby the line 10 is closed by a gate valve 12. Each element is loaded by a spring and connected to the valve 86 by a lever having an adjustable fulcrum 100 or 110. The elements may be arranged in separate inlets (32A, 34A Fig. 8) and the valve 86 may be of resilient or elastomeric material to accommodate overtravel of an actuating stem 90. A clearance C between À002 ins and À05 ins is provided between the valve and its seats. The actuator 14 may be a pneumatic piston.
High-low pressure responsive pilot valve structure
Номер патента: US3760845A. Автор: E Atkinson. Владелец: ACF Industries Inc. Дата публикации: 1973-09-25.