Shut-off valve arrangements for fluids

Details Shut-off valve arrangements for fluids Shut-off valve arrangements for fluids

1978-11-07

1980-10-28

Garrett, Robert E.

Power plants

Combustion products used as motive fluid

Combined with regulation of power output feature

251 29, F02C 904

Patent

active

042299373

ABSTRACT:
A servo-operated shut-off valve arrangement has a main valve responsive to a servo pressure and fluid pressure operated pilot valve for controlling the servo pressure. The pilot valve has two stable operating positions in which the main valve servo pressure is respectively vented and maintained. The fluid pressure which operates the pilot valve is controlled by a valve device movable in opposite directions from a center-stable position to effect movement of the pilot valve. The pilot valve co-operates with the center-stable valve device so that the pilot valve remains in the position in which it was last urged by movement of the valve device away from its stable central position.

REFERENCES:
patent: 2936995 (1960-05-01), Girardin
patent: 3023781 (1962-03-01), Larsen
patent: 3300714 (1967-01-01), Shiels
patent: 3874170 (1975-04-01), Lewis
patent: 3880186 (1975-04-01), Turner et al.

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