Fluid handling – Destructible or deformable element controlled – Heat destructible or fusible
Patent
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
Gerard Richard
Kitamura Valve Seizo Kabushiki Kaisha
Schwadron Martin P.
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