Butterfly valve

Details Butterfly valve Butterfly valve

1975-12-03

1978-04-11

Weakley, Harold W.

Valves and valve actuation

With means to increase head and seat contact pressure

Fluid pressure

251173, 251306, F16K 2500

Patent

active

040835294

ABSTRACT:
The valve closure element has an annular peripheral groove opening outwardly onto the periphery of the closure element. An annular sealing element has an annular heel portion disposed in the groove. The latter has an inner end face whose diameter is less than the inside diameter of the heel portion. The groove is defined laterally by two confronting annular faces of the closure element which have a substantially rectilinear generatrix and grip the heel portion so as to prevent relative movement of the heel portion and closure element.

REFERENCES:
patent: 2978222 (1961-04-01), Henrion
patent: 3394914 (1968-07-01), Nagasato
patent: 3409269 (1968-11-01), Fawkes
patent: 3550905 (1970-12-01), Sifford
patent: 3563510 (1971-02-01), Priese

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