Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator
Patent
1980-07-25
1982-02-23
Cohan, Alan
Valves and valve actuation
Fluid actuated or retarded
Piston type expansible chamber reciprocating valve actuator
251361, 251364, 137492, F16K 31122
Patent
active
043165982
ABSTRACT:
A pilot operated pressure relief valve for use on medium and high pressure vessels, conduits, and the like. A two-stage, non-flowing pilot valve operates a main relief valve of substantially greater capacity. In a preferred embodiment the main valve is mounted directly onto the pressure vessel which is to be vented at a predetermined pressure. The pilot is preferably mounted closely adjacent to the main valve for operating communication therewith. An improved main valve seal is provided which allows the use of commonly available seal configurations in a simple and easily assembled construction to provide a fast operating, high pressure seal.
REFERENCES:
patent: 2616653 (1952-11-01), Tarr
patent: 2655936 (1953-10-01), Wexler
patent: 3951381 (1976-03-01), Whitener
patent: 4132386 (1979-01-01), Lee
patent: 4192483 (1980-03-01), Combes
patent: 4245663 (1981-01-01), Solowy
Cohan Alan
Lidd Francis J.
Vapor Corporation
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