Safety valve

Details Safety valve Safety valve

1994-03-23

1994-12-06

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

Thermal responsive

137469, F16K 1708

Patent

active

053701518

ABSTRACT:
A safety valve for releasing excessive fluid pressure from a pressure vessel including a valve body having an inlet and an outlet, a seat bushing connected into the inlet defining an inlet flow passage, a valve seat on the inward end of the seat bushing, a valve disc having a seat thereon movably mounted in the valve body for opening and closing the valve, a spring coupled with the valve disc for biasing the valve disc toward a closed position. The valve disc includes a convex end portion to reduce turbulence during flow into the valve to permit improved seating of the valve disc and an external annular recess defining an annular lip on the valve disc including a seat having a frustoconical seat surface, the lip being flexible to improve the disc seat contact with the seat around the valve inlet to increase the seat tightness of the valve.

REFERENCES:
patent: 733641 (1904-11-01), Hayden
patent: 2264656 (1941-12-01), Briscoe et al.
patent: 3433250 (1969-03-01), Hagihara
patent: 4708164 (1987-11-01), Scallan
patent: 4858642 (1989-08-01), Fain, Jr.
patent: 5011116 (1991-04-01), Alberts et al.
patent: 5234023 (1993-08-01), Lai
Bulletin SV-7 1555, 1556 and 1557 Cast Steel Safety Valves published Jul. 1986 by Industrial Valve Operation, Dresser Valve and Controls Division.

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