Hi dwyer
The simple solution is to go directly to the manufacturer of the Control valve they often have tools or can provide you with the calcs you require to calculate your flow.
If you don't know the manufacturer there are many Control valve manufacturesrs who can help you I.e...
Hi I'm looking for a simplified Wave celerity calculation for pipes in either I find Lots of given data via pipe manufacturers but are often they are very different for manufacturers who supply similar products. Metric would be preferable but Imperial will do