Sealing device for a valve

Details Sealing device for a valve Sealing device for a valve

1978-02-21

1980-05-06

Schwadron, Martin P.

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

251173, 251174, F16K 506

Patent

active

042012392

ABSTRACT:
A sealing device is provided for use in a butterfly valve, ball valve or the like wherein a seal ring is provided which forms a seal in co-operation with a rotating valve member, in which the seal is held in position by an annular pressure member which is impelled towards the body of the valve by springs, and whose inner periphery is adapted to form an emergency seal in co-operation with the valve member, should the seal itself be damaged or destroyed by fire.

REFERENCES:
patent: 3177887 (1965-04-01), Priese
patent: 3480253 (1969-11-01), Priese et al.
patent: 3593960 (1971-07-01), Scaramucci
patent: 3598363 (1971-08-01), Shaw
patent: 3650508 (1972-03-01), Kosmala et al.
patent: 4005848 (1975-02-01), Eggleston
patent: 4105040 (1978-08-01), Chester

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