One piece seat ring with O-ring seal

Details One piece seat ring with O-ring seal One piece seat ring with O-ring seal

1978-12-20

1980-03-11

Ward, Jr., Robert S.

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

277142, 251DIG1, F16K 316

Patent

active

041924835

ABSTRACT:
Sealing means for a flat gate valve comprising one-piece seat rings on both sides of the gate. A resilient O-ring is loosely received in an annular groove in the leading face of each seat ring and the leading faces of the seat rings, radially outward of the annular groove are relieved to provide small clearances with the sides of the gate. A series of vent ducts are provided in the seat ring at the bottom thereof from the bottom of the O-ring groove to the valve body space radially outward of the seat ring.

REFERENCES:
patent: 2688975 (1954-09-01), Born
patent: 2810543 (1957-10-01), Bryant
patent: 2861771 (1958-11-01), Bryant
patent: 2882009 (1959-04-01), Bryant

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