How to calculate the pressure drop across a fully open valve
End user wants to calculate the pressure drop across a valve for a given flow rate.
1. Select a valve to suit the application and note its Kvs. note if the figure is Cvs then Cvs * 1.03 = Kvs
2. Flow rate is required.
P (bar) = (m3/hr / Kvs) squared.
P (bar) = ( (l/s * 3600 /1000) / Kvs) squared.
To convert to Bar to Kpa: 1 Bar = 100 Kpa