Flow coefficient Cv for Relief Valves?
Flow coefficient Cv for Relief Valves?
(OP)
thread1203-174188: Pressure drop across a relief valve
Hi all
Is there a way to calculate a Cv (flow coefficient) for a Relief Valve ? Kindly post
Hi all
Is there a way to calculate a Cv (flow coefficient) for a Relief Valve ? Kindly post





RE: Flow coefficient Cv for Relief Valves?
RE: Flow coefficient Cv for Relief Valves?
It is possible to calculate it, I think the Fisher 119 manual shows you how or I am sure Anderson Greenwood has something as well
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RE: Flow coefficient Cv for Relief Valves?
ecasflo
RE: Flow coefficient Cv for Relief Valves?
RE: Flow coefficient Cv for Relief Valves?
Unfortunately the Relief valve vendor doesn't know "who" a Cv is. He would happily tell me the maximum relieving capacity & the Discharge coefficient. Ofcourse I know the orifice dimensions.
I was trying to simulate a network with a PSV (compressible flow) and estimate pressure build-up when the relief valve is cracked open.
RE: Flow coefficient Cv for Relief Valves?
Best regards, Morten
RE: Flow coefficient Cv for Relief Valves?
RE: Flow coefficient Cv for Relief Valves?
The orifice: A PSV orifice is a similar are. Depending on your actual software the nominal size should be the same as your model orifice. But i would just check that in a simple model with your design conditions upstream downstream and then see if the calculated capacity matcg your simulated capacity.
RE: Flow coefficient Cv for Relief Valves?