Orifice / Venturi / Nozzle

Differential-pressure flow meters with β and Cd

Inputs

Differential-pressure flow meters. ISO-style discharge with velocity-of-approach factor 1/√(1−β⁴).

Inlet diameter D

Throat / bore d

Differential pressure ΔP

Density ρ

kg/m³

Control-valve flow

Constriction energy