Bidirectional pressure-assisted valve seal

Details Bidirectional pressure-assisted valve seal Bidirectional pressure-assisted valve seal

1975-02-11

1977-02-01

Weakley, Harold W.

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

251307, 251317, F16K 2500

Patent

active

040058484

ABSTRACT:
Disclosed herein are valve seals wherein an annular seal member is retained in an annular recess in a valve body wall, the seal member being axially flexible. A resilient annular garter spring is provided between the seal member and a converging surface on a wall of the valve body recess. When a valve employing this seal arrangement is closed, differential pressure urging the seal member in a downstream direction tends to deflect the seal member around the garter spring, while the garter spring tends to coact with the converging surface of the recess to provide a radially inwardly moving fulcrum for forcing the seal member into tighter engagement with a valve closure member.

REFERENCES:
patent: 2988320 (1961-06-01), Kent
patent: 3181834 (1965-05-01), Jennings
patent: 3250510 (1966-05-01), Williams
patent: 3528448 (1970-09-01), Urban
patent: 3670768 (1972-06-01), Griswold
patent: 3734457 (1973-05-01), Boos

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