Butterfly valve

Details Butterfly valve Butterfly valve

1979-09-05

1981-05-05

Cohan, Alan

Valves and valve actuation

Rotary valves

Butterfly

F16K 1226

Patent

active

042654262

ABSTRACT:
A butterfly valve has its seat formed on a detachable ring which is normal to the axis of the valve body. Both the seat and a co-operating seal on the valve disc have frusto-conical contact surfaces such that with the valve closed these surfaces are on a common cone with an axis inclined to body axis. The disc rotates about an axis offset beyond the larger ends of the contact surfaces and also offset to one side of both the body and cone axes. Operation of the valve and its maintenance are thereby improved.

REFERENCES:
patent: 1744798 (1930-01-01), Price
patent: 3442488 (1969-05-01), Adams
patent: 3595523 (1971-07-01), Felton
patent: 3807690 (1974-04-01), Pfundstein
patent: 3931955 (1976-01-01), Jacobs
patent: 3963213 (1976-06-01), Brattberg

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