SCADA_Dude
Member
Is it possible to accurately calculate flow rate through a valve using valve position and pressure differential across the valve?
It must be possible either using modeling or some advanced formula, I am wondering if anyone has got this to work reliably. In my application, I would be calculating water flow (obviously viscosity would be a factor in this calculation)
Thanks!
I found this on google for a blackbox solution (ClaVal X133):
Q = Cv * sqrt(DP)
Where
Q = flow (gpm)
Cv = returned Cv at the current valve position
DP = difference between upstream and downstream pressure (psi)
An example of using the function for a 6 inch 100-01
valve with
Upstream pressure = 100 psi
Downstream pressure = 50 psi
Valve position = 30 %
Q = cv_6(30) * sqrt(100-50) = 82.6 * sqrt (50) = 584 gpm
It must be possible either using modeling or some advanced formula, I am wondering if anyone has got this to work reliably. In my application, I would be calculating water flow (obviously viscosity would be a factor in this calculation)
Thanks!
I found this on google for a blackbox solution (ClaVal X133):
Q = Cv * sqrt(DP)
Where
Q = flow (gpm)
Cv = returned Cv at the current valve position
DP = difference between upstream and downstream pressure (psi)
An example of using the function for a 6 inch 100-01
valve with
Upstream pressure = 100 psi
Downstream pressure = 50 psi
Valve position = 30 %
Q = cv_6(30) * sqrt(100-50) = 82.6 * sqrt (50) = 584 gpm
Last edited: