High pressure rotary plug valve

Details High pressure rotary plug valve High pressure rotary plug valve

1990-10-29

1991-08-06

Fox, John C.

Valves and valve actuation

Rotary valves

Seat or interface seal

251900, F16K 504

Patent

active

050370677

ABSTRACT:
The two-way and three-way plug valves disclosed include plug members having O-rings in place in continuous grooves defined by inner and outer side walls and a bottom wall extending therebetween. Recesses are formed at spaced apart points along the O-ring groove inner wall to provide an area into which segments of the O-ring may be displaced during existence of a pressure differential across the O-ring. The O-ring groove inner wall recesses are in fluid communication with one another by means of passages, bores and channels defined by the plug member. Edges along the recesses frictionally engage O-ring segments to restrain same against displacement from the O-ring groove.

REFERENCES:
patent: Re30224 (1980-03-01), Ortega
patent: 3991975 (1976-11-01), Sibrava
patent: 4010930 (1977-03-01), Sands
patent: 4262880 (1981-04-01), Danko et al.
patent: 4577870 (1986-03-01), Scott et al.
patent: 4705075 (1987-11-01), Ray

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