Valves and valve actuation – With material guide or restrictor – Valve at point of greatest restriction
Patent
1975-02-20
1976-05-11
Rosenthal, Arnold
Valves and valve actuation
With material guide or restrictor
Valve at point of greatest restriction
251118, F16K 4716
Patent
active
039557944
ABSTRACT:
A hermetically sealed valve includes a valve body having an annular seat adjacent the valve inlet with a frusto-conical surface diverging outwardly therefrom toward the valve outlet and a fixed diffuser assembly including a fixed disc guide and a slidable spring biased closure disc. The disc guide has a diverging frusto-conical surface spaced from the first surface to define a high efficiency annular diffuser flow passage. The fluid exposed surfaces of the disc are located upstream of the passage. The closure disc is actuated between an open position and a closed position by an axially movable valve stem acting on a flexible diaphragm. The pressure drop in the diffuser passage at high flow conditions establishes a force differential on the diffuser assembly acting toward the valve seat which is borne entirely by the disc guide thereby eliminating any pull down forces on the closure disc.
REFERENCES:
patent: 1365852 (1921-01-01), Richmond
patent: 2111836 (1938-03-01), Boyd
patent: 2229600 (1941-01-01), Park
patent: 2235299 (1941-03-01), Park
patent: 2393442 (1946-01-01), Yellott et al.
patent: 2897836 (1959-08-01), Peters et al.
patent: 3286979 (1966-11-01), Brown et al.
Rockwell International Corporation
Rosenthal Arnold
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