Valves and valve actuation – Reciprocating valve – Gate
Patent
1995-05-08
1996-04-09
Fox, John C.
Valves and valve actuation
Reciprocating valve
Gate
251327, F16K 148
Patent
active
055054293
ABSTRACT:
A gate valve structured for the removal and replacement of the valve gate, seats and seals through the flowpath of the valve, a valve body constructed as a single piece of material without covers or valve bonnet to access the seats, gate or interior parts of the valve body, a pair of bolted flanged conduits on each side of the valve body for the attachment to a pipeline and removal of the valve body from the pipeline for access to the body interior for removal of the ring seals and valve seats fitted to the body ports forming the flowpath. The installation or removal of the gate from the valve stem is accomplished by orienting the gate in the valve flowpath, unbolting a split rectangular collar from the stem through a rectangular opening in the gate, and the reorientation of the gate for the removal of a thread protector bolt from the face of the gate, and replacing it by a threaded rod which provides assistance for inserting or extracting the gate through the valve body flowpath.
REFERENCES:
patent: 3168281 (1965-02-01), Yates
patent: 3305208 (1967-02-01), Bredtscheuler
patent: 3923285 (1975-12-01), Riebl et al.
patent: 4440381 (1984-04-01), Tipton, Jr.
patent: 4548386 (1985-10-01), Gladisch et al.
Bardini Armando J.
Smith Charles H.
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