ASME flow nozzles consist of an elliptical converging section and cylindrical throat section. This device has a greater overall pressure loss or operating cost in terms of head pressure than a subsonic Venturi but offers lower installation costs. Installation requirements are more stringent than for a subsonic Venturi but less than for an orifice meter. These meters are offered with either throat taps or pipe wall taps for pressure measurement.
Performance Charts by Gas
The following are examples of ASME Flow Nozzles manufactured by Flow Systems.