Issues with calculating the empirical valve pressure difference for control valves?
Thread Content
Sometimes, when calculating control valves, the pressure difference required by the process for the valve is not specified; we only know the pressure before the valve. How can we estimate this pressure difference? So, what size is appropriate?
It is best to use a selection software for control valves to estimate the pressure difference; once the calculation results are obtained, the CV value or KV value can be compared.
Is there software upstairs? How are the empirical formulas for differential pressure estimation expressed?
The data I commonly use is for reference only: Liquid: 0.05 Mpa; Gas: 0.1 Mpa; Steam: 0.1–0.15 Mpa
Go and check this standard; it contains calculations for instances, and it’s best to print a copy out to study it carefully. That’s how I learned to calculate pressure drops. People in process engineering often don’t know how to do it; if they give you a value arbitrarily, it becomes difficult to calculate the values for your valves. HG-T_20570.5-95_ Calculation of the system characteristics of pumps and determination of the relative installation height of equipment
Thanks for the advice from the 5th floor; I’ve learned something from it