Control valve opening degree
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I have a question for everyone. I need to calculate the opening degree of a control valve. The conditions are as follows: the pressure difference before and after the valve is 6 MPa, the designed flow rate under normal operating conditions is 15.2 m3/h, with an opening degree of 62%–66%; the selected CV value is 2.5. Now, the flow rate under current operating conditions is 3 m3/h. What would be the approximate opening degree? Could someone expert help me calculate this to see if it’s necessary to adjust the design parameters?
Your parameters are not sufficient; only an approximate estimate can be made. If the valve has a linear characteristic, the opening degree at 3 m3/h is approximately 11%.
It’s linear; how is this calculated? Can we communicate?
Obtain several more flow rates to create the valve characteristic curve, and then use EXCEL with formulas to carry out the calculations
When selecting a control valve, three parameters are provided: maximum flow rate, normal flow rate, and minimum flow rate. Each of these flow rates corresponds to a specific opening degree of the valve. Put this correspondence into Excel, fit a curve; once the equation is known, conversion can be done
Insufficient parameters; calculation software is required