How to calculate the flow rate at different opening degrees of a control valve
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As the title suggests, how to calculate the flow rate at different opening degrees of a control valve. Known conditions: medium is gas, pressure difference before and after the control valve, molecular weight....... What is the calculation formula?
Just use a valve selection software to do the calculation
Same question. . . . . . Are there any other ways?
Fluid equation + gas equation………………………………
Just passing by to take a look – is this usually calculated using the manufacturer’s valve selection software?
This post was last edited by HEJIYUER on 2015-7-23 at 13:40. The rated Cv value of the valve, its opening degree, and the adjustable ratio are set to 30; by entering the following program, the operating Cv value can be obtained. The flow rate at the operating Cv value is then calculated back using the control valve calculation program. http://bbs.hcbbs.com/thread-790690-1-1.html
Different valves yield different results; the original poster is oversimplifying things
Different valves yield different results; the original poster is oversimplifying things
To be specific, just explain how they differ and the approach to calculation, etc
Actually, the original poster doesn’t need to know too much; the valve factory will do the calculations