Butterfly valve

Details Butterfly valve Butterfly valve

1980-12-03

1981-10-13

Chambers, A. Michael

Valves and valve actuation

Mechanical movement actuator

Particularly packed or sealed

251307, 277 27, 277189, F16K 3144, F16K 122, F16K 4102

Patent

active

042944287

ABSTRACT:
A butterfly valve comprising a valve body mounted on a valve stem in a valve housing. The valve housing is provided with valve seats to contact the periphery of the valve body when the valve is closed. Elastic seal members are disposed between the end surfaces of the valve seats and the valve stem in a manner to surround the latter. The butterfly valve of the invention further comprises tubular holder members rotatable relative to the valve stem and fitted with the elastic seal members on outer parts thereof.

REFERENCES:
patent: 402267 (1889-04-01), Meader
patent: 1346616 (1920-07-01), Treichel et al.
patent: 2851315 (1958-09-01), Zavoda
patent: 3079651 (1963-03-01), Hayman et al.
patent: 3393917 (1968-07-01), Kendall et al.
patent: 3974855 (1976-08-01), Webb
patent: 4022424 (1977-05-01), Davis et al.
patent: 4036468 (1977-07-01), Webb
patent: 4139204 (1979-02-01), Howe

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