Fire seal for valves

Details Fire seal for valves Fire seal for valves

1980-04-14

1981-07-28

Weakley, Harold W.

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

251174, 251315, F16K 1304

Patent

active

042805228

ABSTRACT:
A ball valve is disclosed having two seat rings on each side of the closure member. Each seat ring is operative independently of the other and each ring is sealed with respect to both the ball and with respect to the body independently of the other seat ring. One of the seat rings employes metallic fire resistant seals to seal with respect to both the body and the ball.

REFERENCES:
patent: 3270772 (1966-09-01), Rakus
patent: 3346234 (1967-10-01), Allen
patent: 3392743 (1968-07-01), Pennington
patent: 3504885 (1970-04-01), Hulsey
patent: 3583426 (1971-06-01), Feres
patent: 3990465 (1976-11-01), Allen
patent: 4105040 (1978-08-01), Chester
patent: 4114639 (1978-09-01), Cross

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