Gate valve having a secondary seal

Details Gate valve having a secondary seal Gate valve having a secondary seal

1981-02-17

1983-03-22

Weakley, Harold W.

Valves and valve actuation

Sequential opening or closing of serial ports in single flow...

251328, F16K 334

Patent

active

043772730

ABSTRACT:
Gate valve having a secondary seal, wherein the gate forms a metal to metal seal with the seat and wherein a resilient seal is moved toward the gate when the gate is in closed position to form a secondary fluid-tight seal with the gate, whereby leakage past the gate is effectively prevented.

REFERENCES:
patent: 2194261 (1940-03-01), Allen
patent: 3102709 (1963-09-01), Allen
patent: 3135285 (1964-06-01), Volpin
patent: 3321176 (1967-05-01), Bolling

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