Fire-safe sealing device for valve

Details Fire-safe sealing device for valve Fire-safe sealing device for valve

1980-01-28

1981-06-09

Cohan, Alan

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

137 74, 251306, F16K 310

Patent

active

042720540

ABSTRACT:
A fire-safe sealing device for a valve including a valve body defining a fluid passage and an inner valve positioned in said fluid passage to open or close the fluid flow therethrough. The device comprises an annular groove formed around the fluid passage, a seat packing made of synthetic resin mounted in said annular groove, and a metallic annular elastic member arranged to contact with one side of said seat packing and the seating surface of the inner valve. The metallic elastic member acts to promote the sealing action of the seat packing and also acts to hold the leakage of the fluid to the minimum when the seat packing has been lost by a fire.

REFERENCES:
patent: 3734457 (1973-05-01), Roos
patent: 4202365 (1980-05-01), Aoki
patent: 4220172 (1980-09-01), Stager

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