Valve positioning device

Details Valve positioning device Valve positioning device

1988-03-28

1989-09-05

Garrett, Robert E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Bias-type input and feedback signal means

91388, 91443, 137 82, 251 28, 92130R, 92135, F15B 1316

Patent

active

048627887

ABSTRACT:
A valve positioning device capable of comparing the travel position of an output shaft of a diaphragm actuator or cylinder with the pressure level of a pneumatic input signal and further being capable of manipulating the pressure of a separate air signal piped to said diaphragm actuator or cylinder in order to correct any imbalance between said stem position and a given pneumatic signal level; wherein said valve positioning device is further capable of varying its dynamic response by built in adjustment means.

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