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If you have a Cv value for a valve or other device, you can model it as a component having a flow rate vs dP profile.
Use the equation below to calculate values for the component data table:
dP = [(Q/Cv)2]*(rho/62.4)
where
Q = flow rate in gpm
Cv = valve flow coefficient
dP = pressure drop in psi
rho = fluid density (lb/ft3)
(Ref. Crane Technical Paper No. 410, pg 2-10)
For a particular valve position, take the corresponding Cv and compute the pressure drop over a range of flow rates. Then enter the data as a component in your PIPE-FLO model. Below is an example of a component with a Cv=150.
Use the equation below to calculate values for the component data table:
dP = [(Q/Cv)2]*(rho/62.4)
where
Q = flow rate in gpm
Cv = valve flow coefficient
dP = pressure drop in psi
rho = fluid density (lb/ft3)
(Ref. Crane Technical Paper No. 410, pg 2-10)
For a particular valve position, take the corresponding Cv and compute the pressure drop over a range of flow rates. Then enter the data as a component in your PIPE-FLO model. Below is an example of a component with a Cv=150.