Orifice Plate | Longrun

 An orifice plate measures the flow of a liquid or gas by the difference in pressure from the upstream to the downstream.  This plate creates a restriction in a pipe that causes a difference in pressure between the two sides.  A meter then measures the difference in pressure across the orifice plate.  The plates should be installed in a straight run of pipe in order to avoid turbulance at the plate.  The upstream side is longer than the downstream in order to straighten the flow before the plate.  It is calculated at so many diameters of pipe, 10D, 12D, ect. for the length. Orifice plates are used between orifice flanges and are part of an orifice meters.