WHAT IS THE Differance b/w on/off & pid control valve?
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Answer Posted / m.v.ramesh
Most ofthe answers are right, but the basic question is a
bit diverting in to other direction.
Question has to be like this.
What is the difference between On-Off control valve and
regulatory control valve.
Dont call as PID control valve. offcource regulatory
control valve is controlled by p or I or PI or Pd or PID
controlling modes.
Regulatory control valves can be operated by hand wheel
also with out PID controllers, some applications with
manual pneumatic regulators.
rest all answers are ok. simply on-off valves have 2
positions and regulatory valves can have n number of
positions in its range. selection of these are process /
design dependent.
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