Valve Leakage
Valve Leakage
(OP)
What is the best way to calculate valve leak-by rate in a angle control valve? The data that is available to me is upstream pressure at different valve positions, downstream pressure, upstream temperature, and the information on the valve, such as Cv and other technical stuff.
I am trying to figure out the estimated leak-by rate for this valve, but have no idea and keep going in circles. I am not even sure if it is possible.
I am trying to figure out the estimated leak-by rate for this valve, but have no idea and keep going in circles. I am not even sure if it is possible.





RE: Valve Leakage
RE: Valve Leakage
http://www.svf.net/pdf/Class_VI.pdf
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RE: Valve Leakage
Once placed in service assume that the FCI 70-2 leakage classes are VERY optimistic compared to the actual leakage.
RE: Valve Leakage
This is very true. The FCI test is for a new valve, usually tested at the manufacturers facility and to one specifice test procedure.
Unfortunately, valves do leak. The only disagreement should be how to measure and evaluate it.
Paul Ostand
www.ostand.com