Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1999-05-03
2000-11-21
Shaver, Kevin
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
251 38, F16K 3112
Patent
active
061491241
ABSTRACT:
A pilot operated control valve has a body with an inlet and an outlet. A main valve poppet is movable within the body to selectively control flow of fluid between the inlet and outlet. The main valve poppet has a flexible diaphragm with a pilot passage therethrough which is opened and closed by movement of a pilot poppet. The diaphragm flexes due to a pressure differential that acts on the pilot poppet, which flexing compensates for adverse effects that the pressure differential has on the operation of the pilot poppet.
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Bastianelli John
Haas George E.
HUSCO International Inc.
Shaver Kevin
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