Butterfly valve

Details Butterfly valve Butterfly valve

1974-10-11

1976-06-15

Cline, William R.

Valves and valve actuation

Rotary valves

Butterfly

251162, 251192, F16K 122

Patent

active

039632130

ABSTRACT:
The valve seat of a butterfly valve is defined by a circular edge on a land-like radially inward projection in the valve housing, lying in a plane normal to the axis of the fluid passage through the seat. The valve member rotates about a pivot axis which is transverse to the passage axis, spaced in one direction from it and spaced to one side of said plane. The valve member has a peripheral sealing surface corresponding to the frustum of an oblique circular cone symmetrical to a plane containing the passage axis and normal to the pivot axis, which cone (considering the valve member in closed position) has its apex at the other side of the valve seat plane and spaced in said one direction from the passage axis.

REFERENCES:
patent: 3393697 (1968-07-01), Fawkes
patent: 3471120 (1969-10-01), Geiselman
patent: 3583670 (1971-06-01), Manske
patent: 3809361 (1974-05-01), Pfundstein et al.

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