Valve actuator system

Details Valve actuator system Valve actuator system

1986-06-12

1988-02-02

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

91 20, 91 31, 91 33, 91388, F16K 31128

Patent

active

RE0325880

ABSTRACT:
A pneumatic-hydraulic proportional valve actuator system is provided having a relatively simple and adjustable means of achieving two stroking speeds by the hydraulic actuator, high speed in normal operation and low speed for small position adjustments and for the final part of any large position adjustments. This prevents overshoot and instability of the actuator.

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