Supply control valve with integral pressure limiter

Details Supply control valve with integral pressure limiter Supply control valve with integral pressure limiter

F - Mech Eng,Light,Heat,Weapons

15

B

137/106

F15B 13/043 (2006.01) F15B 13/04 (2006.01)

Patent

CA 1247497

ABSTRACT SUPPLY CONTROL VALVE WITH INTEGRAL PRESSURE LIMITER In a pilot operated fluid supply valve the usual control pressure applied to the control surface of a main supply valve can be interrupted by a fluid switch and replaced with a pressure which closes the main supply valve. The fluid switch is responsive to the load pressure in the load port of the main valve. The fluid switch may include a rocker arm actuated by a diaphragm in fluid communi- cation with the load port. In one system, main supply and waste diaphragm valves are controlled by a pilot valve and a pressure reversing valve, and the fluid switch is positioned between one of those valves and the main supply valve. In another system, the main valves are controlled by a dual output pilot valve.

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