Throttle valve operator

Details Throttle valve operator Throttle valve operator

1975-06-02

1977-07-05

Cohen, Irwin C.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91450, 251 25, F15B 910

Patent

active

040332349

ABSTRACT:
The disclosure relates to a valve operator which may be used for controlling an inlet valve to a steam turbine. The valve operator has a trip position for rapidly closing the steam inlet valve and a reset position whereby the position of the steam inlet valve may be hydraulically controlled. The valve operator includes a manual operator and a remote powered operator. A trip relay and a reset pilot are fluidly interconnected so that the valve operator must be reset after each trip. The valve operator also includes a valve position feedback mechanism.

REFERENCES:
patent: 2878785 (1959-03-01), Rexford

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