Selector relief valve assembly

Details Selector relief valve assembly Selector relief valve assembly

1994-11-07

1995-10-31

Fox, John C.

Fluid handling

Systems

With flow control means for branched passages

251250, F16K 1110

Patent

active

054620864

ABSTRACT:
A dual pressure relief valve selector is formed by a Y-shaped tubular body having an inlet port at its stem position connected with a vessel or a line to be monitored. Each leg of the Y-shaped housing is connected in fluid communicating relation with a safety relief valve. A spring and fluid flow biased open flap valve and valve seat is contained by each leg of the Y-shape adjacent the inlet of the respective relief valve. A pinion journalled by the housing moves a rack to and fro between the flap valves for normally maintaining one of the flap valves in closed position and isolating the relief valve downstream from the closed flap valve.

REFERENCES:
patent: 3095903 (1963-07-01), Jennings
patent: 3596679 (1971-08-01), Sugden, Jr.
patent: 4388766 (1983-06-01), Sanderson
patent: 4403626 (1983-09-01), Paul, Jr.
patent: 4580599 (1986-04-01), Dighton

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