Pressure relief valve

Details Pressure relief valve Pressure relief valve

1987-06-11

1988-01-12

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137469, 137538, 137542, F16K 3138

Patent

active

047184507

ABSTRACT:
A valve head of the pressure relief valve is urged into the closed (seated) position by a spring, assisted by a force derived from pressurized fluid which is situated in a chamber behind the valve head and which is admitted thereto from the upstream side of the valve seat through a chamber in the valve head. The chamber in the valve head is open toward the inlet port of the valve and is partly defined and surrounded by a skirt-like extension oriented transversely to the axis of the valve inlet port. The diameter of the chamber whose opening has a plane generally perpendicular to the direction of valve head motion, is at least as large as the diameter of the valve intake port. In the seated (closed) state the skirt-like extension reaches transversely into the inlet port at least as far as the axis of the inlet port and in the maximum open position the skirt-like extension is at the most just clear of the inlet port.

REFERENCES:
patent: 2225880 (1940-12-01), Montelius
patent: 2364812 (1944-12-01), Pierson
patent: 2372631 (1945-03-01), Stevenson
patent: 2526935 (1950-10-01), Coker
patent: 3160332 (1964-12-01), Brunson
patent: 3195556 (1965-07-01), Norstrud
patent: 3542062 (1970-11-01), Zahid
patent: 3626975 (1971-12-01), Bobst
patent: 4469123 (1984-09-01), Merrill

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