Cavityless gate valve

Details Cavityless gate valve Cavityless gate valve

1997-10-10

2000-01-04

Fox, John

Valves and valve actuation

Reciprocating valve

Gate

251328, F16K 302

Patent

active

060101156

ABSTRACT:
A gate valve has a pair of spaced-apart body halves with a slot positioned between them. The slot extends transverse, preferably perpendicular, to a fluid passageway. In one embodiment, an O-port gate is moveable within the slot and includes a pair of opposed major surfaces. The O-port gate includes a fluid impermeable portion and an aperture. A pair of opposed, plastic interior plates face each other and contact the opposed major surfaces of the O-port gate, thereby forming a cavityless gate valve. The plastic interior plates, formed of high-density polyethylene (HDPE), for example, have a lubricity that prevents the gate from seizing to them.

REFERENCES:
patent: 3076631 (1963-02-01), Grove
patent: 4201365 (1980-05-01), Paptzun et al.
patent: 4221307 (1980-09-01), Peterson
patent: 4377274 (1983-03-01), Mayhew, Jr.
patent: 4765361 (1988-08-01), Clifford
patent: 5020776 (1991-06-01), Owens et al.
patent: 5330158 (1994-07-01), Ellich et al.

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