Low pressure relief valve

Details Low pressure relief valve Low pressure relief valve

1995-02-22

1997-04-29

Rivell, John

Fluid handling

Convertible

Reversible check

1374939, 137533, 13753311, 137549, F16K 1726, F16K 1504

Patent

active

056239580

ABSTRACT:
A low pressure relief valve having a flow passage therethrough providing fluid communication between the interior and exterior of a vessel the interior of which is under a low positive or negative pressure. A valve port in the flow passage has a valve seat therearound and a closure member is carried in said valve body for engagement with the valve seat to block fluid communication between the interior and exterior of said vessel. The closure member is of a preselected weight and is free to disengage the valve seat in response to a predetermined increased pressure differential between the vessel interior and exterior, without being affected by any other force than gravity, to permit fluid communication through the flow passage for reducing the pressure differential.

REFERENCES:
patent: 957318 (1910-05-01), Ellis
patent: 1856492 (1932-05-01), Marshall
patent: 3813896 (1974-06-01), Lebahn
patent: 3814123 (1974-06-01), Cook
patent: 4016904 (1977-04-01), Gordon
patent: 5137049 (1992-08-01), Orlowski
patent: 5259412 (1993-11-01), Scott

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