Valve operator

Details Valve operator Valve operator

1976-12-23

1978-08-01

Cohen, Irwin C.

Motors: expansible chamber type

With motive fluid valve

Relatively movable serial valves

91415, 91451, 92168, F15B 1108, F15B 1304

Patent

active

041035925

ABSTRACT:
A valve operator is disclosed for controlling an inlet valve to a large fluid-driven turbomachine such as a steam turbine. Such a valve is subject to a fast closing requirement under emergency trip conditions and at other times, the valve may be required to provide a precise steam flow regulating function. The present invention responds to these various requirements by providing a valve operator capable of fast closing by means of a disk-dump valve within the valve operator for rapid hydraulic fluid evacuation. In addition, the precise control of steam flow is accomplished by including a double-acting hydraulic cylinder within the valve operator.

REFERENCES:
patent: 503068 (1893-08-01), Austin
patent: 607265 (1898-07-01), McLean
patent: 970435 (1910-09-01), Dourte
patent: 2143637 (1939-01-01), Vollmann
patent: 2330781 (1943-09-01), Langmyhr
patent: 2826216 (1958-03-01), Thomas
patent: 3073340 (1963-01-01), Hancock
patent: 3226078 (1965-12-01), Anderson
patent: 3451423 (1969-06-01), Priese
patent: 3495501 (1970-02-01), Kure-Jensen
patent: 3922955 (1975-12-01), Kast

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