Compact controller for control valve
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United States of America Patent
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-
Oct 21, 1997
Grant Date -
N/A
app pub date -
Aug 17, 1995
filing date -
Sep 3, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A compact controller controls a control valve, wherein the control valve is actuated by a pneumatic actuator. The controller comprises control electronics for generating a control deviation signal. The control deviation signal is derived from the difference between an electrical standard set value signal and a converted electrically measured value signal. The converted electrically measured value signal is a measured value signal, the measured valve signal being a signal corresponding to a value of a predetermined process variable. An electropneumatic (E/P) signal transducer converts the control deviation signal into a pneumatic pressure signal for the pneumatic actuator. Thus, the controller provides control to the control valve, and further the controller is directly flanged to the pneumatic actuator.
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