CV valve definition
CV valve definition
(OP)
What is the exact definition for CV valve?
Is there a web site, which explain it?
Thanks, Aharon
Is there a web site, which explain it?
Thanks, Aharon
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RE: CV valve definition
The Cv is the number of US gallons of water the valve will pass with a differential pressure of 1 psi.
The standard equation for a valve's capacity in liquid service is:
Q = Cv(dP/SG)^0.5
This assumes there is no flashing or cavitation of the fluid.
Q is the flowrate, gpm
Cv is the valve Cv
dP is the differential pressure, psi
SG is the specific gravity of the fluid
RE: CV valve definition
You may have a look at this article
http://www.cheresources.com/valvezz.shtml
Regards
RE: CV valve definition
Check into ISA standards, ISA-S75.02.
Take care
RE: CV valve definition
Other values such as loss coefficeint may provide a more accurate tool but for most engineering purposes Cv will do all right.
Best Regards
Morten