How does an orifice plate work?

The small hole on orifice plates restricts flow which causes the pressure to drop. The pressurecan be measured using pressure gauges before and after the orifice plates whichallows you to determine the flow rate using the Bernoulli’s Equation. Anorifice plate is installed between orifice flanges or a metering unit.

Orifice Fittings
Orifice Plates