Valve with internal accumulator and check valve

Details Valve with internal accumulator and check valve Valve with internal accumulator and check valve

F - Mech Eng,Light,Heat,Weapons

16

K

137/141, 137/94

F16K 31/124 (2006.01) F15B 13/043 (2006.01)

Patent

CA 1139635

A B S T R A C T A solenoid controlled, pilot operated valve which is pro- vided with a pilot air accumulator chamber in the pilot air supply to in- sure soundness of operation of the pilot air supply, and make the shifting characteristics of the valve relatively constnat and positive. The main spool valve is shifted in one direction by pilot air and shifted in the other direction by either a return spring alone, or a return spring with an air assist. The accumulator chamber may be supplied with pilot air from an external source of pressurized air, or from an internal source within the valve. If an internal source of pilot air is employed, then a check valve is operatively mounted in an air passage between the valve supply chamber and the accumulator chamber to allow free flow into the accumulator chamber and restrict any air bleeding back to the valve supply chamber.

366474

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