August 2021 Choked Flow in Control Valves Choked Flow in Control Valves By Katherine Bartels, Adam Harmon Summary Choked flow in control valves is a subject of serious concern for industrial users.

Flow pressure drop across this orifice is used to shift a balanced spool against a control spring. This spool movement is used to maintain a constant pressure drop across the orifice, which in ...

vpdd = Δp (qmax) Δp (qmin) where: vpdd=valve pressure drop decay Δp (qmax)=valve pressure drop at maximun flow Δp (qmin)=valve pressure drop at minimun flow Using the vpdd calculation, the control ...