Determine variable pressure drop....pressur edrop do to control valve?

Basically designing an olefins plants...lots of distillation towers and pumps...need to determine the pressure drop of control valves.





Told 30-60% of variable pressure drop = control valve pressure drop


Also Variable pressure drop is NOT..... ro*g*h





So i was told though that is the defintion of variable pressure drop.....not sure what to use





thanksDetermine variable pressure drop....pressur edrop do to control valve?
I hope these help.