Manual valve Cv
Manual valve Cv
(OP)
How can we find Cv for a manual valve?
For example,what is the Cv for 6" full port globe valve?
For example,what is the Cv for 6" full port globe valve?
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RE: Manual valve Cv
RE: Manual valve Cv
RE: Manual valve Cv
Anyway, once you have found a K-value (which should be about 5.5 for a 6" globe valve) you can convert it to a Cv using the formula
Cv = 29.9 x d2 / √K
where d is the pipe ID in inches
Plugging 6" into this formula with a K of 5.5 gives a Cv of 459, which corresponds quite well with the value of 446 from my Kitz catalog.
But once youhave the details of the actual valve it is always best to get the manufacturer's data. For example, if you select a guided plug valve the Cv could be significantly less than the estimate above.
Katmar Software - AioFlo Pipe Hydraulics
http://katmarsoftware.com
"An undefined problem has an infinite number of solutions"
RE: Manual valve Cv
My focus is on petrochemical valves for corrosive applications.
RE: Manual valve Cv
...need I remind you all that both Cv and K values for any valve are by definition (look up Kv and Cv!) actual measured values: the measured throughlet of water under certain, defined, conditions?
The answer for finding of Cv for a given manual valve are then
a) mesurement as given in definition / certified measurement methodes.
b) compare or transfer from empirical or measured data from other, similar valves as adviced in this string.
RE: Manual valve Cv
Best to you,
Goober Dave
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