Butterfly valve

Details Butterfly valve Butterfly valve

1974-03-25

1976-01-13

Cohan, Alan

Valves and valve actuation

Rotary valves

Butterfly

251173, F16K 1276, F16K 2500

Patent

active

039319555

ABSTRACT:
A butterfly valve comprising a housing in which a flat flap having an elastic rim is adapted to turn between a position in which the plane of the flap is parallel to the axis of the flow passage across the housing and a position in which the elastic rim is in sealing relationship to a seat arranged all around the axis of the passage across the housing, said seat having the shape of a cone surface, the apex of the cone being located outside the axis of the flow passage across the housing, wherein the sealing surface of the seat forms part of an oblique circular cone, the circular base of said cone being at right angles to the axis of the flow passage of the seat.

REFERENCES:
patent: 926174 (1909-06-01), Clark
patent: 1273740 (1918-07-01), Clark
patent: 3809361 (1974-05-01), Pfundstein
patent: R23613 (1953-01-01), Danks

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