Insert valve

Details Insert valve Insert valve

1989-03-15

1989-11-07

Cohan, Alan

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

1374542, F16K 31122

Patent

active

048786489

ABSTRACT:
A removable insert valve provided with a piston which can be displaced in a bore in a valve housing by pressure fluid action, there being formed at one end of the bore a valve seat and a pressure fluid passage leading through the housing traversely to the bore. The piston is free of O-rings and is provided with first a ledge to constitute a pressure area in the region of the opening of the transverse passage into the bore in combination with a control pressure pump to selectively apply opening and closing pressure to a second ledge on the piston, in order to achieve more rapid operation of the valve.

REFERENCES:
patent: 4121619 (1978-10-01), Paulikonis
patent: 4190073 (1980-02-01), Claycomb
patent: 4281678 (1981-08-01), Claycomb
patent: 4679586 (1987-07-01), Riedel

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