Butterfly type valve seal

Details Butterfly type valve seal Butterfly type valve seal

1981-08-14

1986-12-30

Weakley, Harold W.

Valves and valve actuation

With means to increase head and seat contact pressure

Fluid pressure

251173, 251180, 251307, F16K 2500

Patent

active

046323600

ABSTRACT:
A pivotally adjustable valve disc has a ring seal set in its grooved periphery for contact with a wall of a valve accomodating bore. A flexible, radially expansible member is in the valve groove in a backing relation to the ring seal. Passages admit pressure fluid from the upstream side of the valve disc to the valve groove where the applied pressure is exerted through the radially expansible member toward a radial expansion of the ring seal. In its pressured contact with the seal, the radially expansible member blocks pressure fluid escape through gaps and interfacial joints therein.

REFERENCES:
patent: 1860619 (1932-05-01), Pfau
patent: 2965354 (1960-12-01), Grove
patent: 3027133 (1962-03-01), Anderson
patent: 3282558 (1966-11-01), Swain
patent: 3642248 (1972-02-01), Benware
patent: 3726503 (1973-04-01), Fawkes
patent: 3734457 (1973-05-01), Roos
patent: 4290615 (1981-09-01), Etcheverry

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