Bumpless valve changeover
Bumpless valve changeover
(OP)
I am looking for a way to do a smooth changeover between to control valves from the DCS (Siemens Moore APACS)
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Bumpless valve changeover
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RE: Bumpless valve changeover
RE: Bumpless valve changeover
If the valve has digital feedback (position) sensors on OPEN and CLOSE position, when change-over wait for the OPENING VALVE to give an OPEN signal. Only when this signal is received you can CLOSE the CLOSING VALVE.
A small timer (5 seconds) can smooth the operation even more.
This is a very good practice to avoid water/fluid hammer (high pressures) in the piping system.
Good luck,
CARF