Cv correction for pipe size
Cv correction for pipe size
(OP)
I cannot find any reference for the effect that the inlet/outlet pipe diameter may influence the Cv of a throttling valve. We have a 4" butterfly valve bolted to 6" piping and are having control problems throttling the valves to maintain liquid level. We're thinking the Cv through the valve is not per manufacturers data and they didn't know of a correction. Can anyone guide me on this one ?





RE: Cv correction for pipe size
BobPE
RE: Cv correction for pipe size
RE: Cv correction for pipe size
RE: Cv correction for pipe size
http://www.documentation.frco.com/
via the Process Management Documentation Library
RE: Cv correction for pipe size
RE: Cv correction for pipe size
Piping Geometry Factor: Reducing pipe sizes for
installation of a smaller than pipe size valves will reduce
the effective Cv of the valve. The greater the pipe
reduction, the greater loss of Cv.
Determing the actual Cv would give you something to compare against.