The pressure drop Δp at a constriction is calculated from the flow Q, the diameter d of the orifice, the density of the media and the flow coefficient α. The flow coefficient α is depending on the form of the constriction. Typically, it is between 0.4 and 0.8. for a sharp-edged orifice (l/d < 1,5) is usually assumed as 0.78.
Calculate the pressure loss through an orifice directly and easily in our hydraulic calculator.