Fluid handling – Line condition change responsive valves – Pop valves
Patent
1989-01-23
1990-06-12
Cohan, Alan
Fluid handling
Line condition change responsive valves
Pop valves
137542, 1375395, 251333, F16K 1706
Patent
active
049324349
ABSTRACT:
An adjustable pressure relief valve is disclosed comprising a valve body having an inlet and an outlet, a spherical valve seat associated with the inlet, a valve member having a mating spherical sealing surface configured to seal off the flow of fluids through the valve at the valve seat, a huddling chamber around the periphery of the mating spherical sealing surface, an adjustment screw supported in the valve body to allow rotational but not longitudinal movement of the adjustment screw with respect to the valve body, a compression member connected to the adjustment screw and mounted within the valve body which moves longitudinally with respect to the adjustment screw when the adjustment screw is rotated and a resilient member biased between the compression member and the valve member. In the preferred embodiment, the mating spherical sealing surface is provided by staking a spherical ball inside a cavity in the valve member, leaving portion of the ball exposed. The huddling chamber is provided by a ring placed beneath the ball which provides a close fit with the outside of the nozzel into which the seating surface is lapped.
REFERENCES:
patent: 303252 (1884-08-01), Ashton
patent: 620936 (1899-03-01), Kunzer
patent: 2676782 (1954-04-01), Bostock
patent: 2875978 (1959-03-01), Kmiecik
patent: 3123092 (1964-03-01), Kmiecik
patent: 3421547 (1989-01-01), Aslan
patent: 3945607 (1967-03-01), Dashner
patent: 4432389 (1984-02-01), Jackson
patent: 4799506 (1989-01-01), Taylor
"Mercer 8100 Series Safety Relief Valves" brochurue (un-dated).
"WellMark Safety Relief Valves" document, 2 pages (un-dated).
"Type 8700 Safety Relief Valves" document, pp. 4 and 12 (Taylor Tools) (un-dated).
"Baird Gas Safety Valve Model 7100-1-GHP" document, 1 page (un-dated).
"Hydro Seal Valve Company, Inc." document, pp. 4, 5, and 13 (un-dated).
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