Ball valves

Details Ball valves Ball valves

1976-12-09

1978-08-22

Weakley, Harold W.

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

251174, F16K 1304

Patent

active

041081960

ABSTRACT:
In a ball valve, springs urging opposed annular valve seats into engagement with the ball press against heat sensitive material, and bushes between trunnions and sockets in the ball are made of heat sensitive material, so that, in the event of fire reaching a ball valve in a pipeline, and the valve being closed, said heat sensitive material and said bushes disintegrate, and the ball is moved by fluid pressure relative to the trunnions in the downstream direction and pushes the downstream valve seat into sealing engagement with the valve housing.

REFERENCES:
patent: 743511 (1903-11-01), Huxley
patent: 3175495 (1965-03-01), Anderson
patent: 3177887 (1965-04-01), Priese
patent: 3346234 (1967-10-01), Allen
patent: 3472270 (1969-10-01), Masheder
patent: 3497178 (1970-02-01), Priese
patent: 3618627 (1971-11-01), Wagner
patent: 3695579 (1972-10-01), Allen
patent: 3752178 (1973-08-01), Grove
patent: 3990465 (1976-11-01), Allen

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