Fluid handling – Removable valve head and seat unit – Threaded into valve casing
Patent
1994-10-11
1997-01-07
Hepperle, Stephen M.
Fluid handling
Removable valve head and seat unit
Threaded into valve casing
137508, 137509, 13762538, F16K 1704
Patent
active
055906834
ABSTRACT:
The present invention shows a cartridge-type, compensating relief valve for use in a manifold cavity is disclosed. The valve comprises a gland removably secured within the manifold cavity, and having a circular valve seat and a central cavity therethrough. The valve also comprises a valve stem extending through the central cavity and moveable between an open and a closed position. The valve stem has a piston portion extending into the manifold cavity and piston ports extending from the outward face to the inward face of the piston. The piston ports diverge radially from a central point on the outward face of the piston to points around the circumference of the inward face. The valve is also provided with at least one internal fluid chamber in direct pressure communication with the entry port of the cavity, which permits fluid pressure to be directed against at least one internal surface of said valve stem, exerting a force tending to hold the valve in an open position. Means to adjust the sensitivity of the valve, both locally and from a central location, are also shown.
REFERENCES:
patent: 3054420 (1962-09-01), Williams
patent: 5007454 (1991-04-01), Lee
patent: 5255704 (1993-10-01), Bennett
patent: 5375623 (1994-12-01), Weber
Beam Robert Charles
Hepperle Stephen M.
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