Fail-safe valve

Details Fail-safe valve Fail-safe valve

1980-12-10

1982-10-19

Spiegel, H. Jay

Valves and valve actuation

Balanced valves

Reciprocating

251321, 251367, F16K 132

Patent

active

043546641

ABSTRACT:
The valve of U.S. Pat. No. 3,774,877 in which have valve operating pistons are mounted in a tubular sleeve received in a bore in a two part valve body, one part containing the connection for P1 and the other part containing the connection for P2 and the valve port.

REFERENCES:
patent: 3370613 (1968-02-01), Weaver
patent: 3774877 (1973-11-01), Robertson
patent: 3847374 (1974-11-01), Tittelbach

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