The flow nozzle is used for high velocity flow measurement where erosion or cavitation could wear or damage an orifice plate. It does not rely on a sharp edge (which can degrade over time) for maintaining its accuracy and therefore offers excellent long-term accuracy with less wear and reduced possibility of distortion. It is often used for flow testing on steam-raising plant.
A flow nozzle can measure higher flow rates than an equivalent orifice plate at the same design differential pressure. The flow nozzle is available to 3 standards and in designs for either clamping between flanges (within the bolt circle) or for welding into the pipe.
Nozzle Standard:
- NOZ-NI ISA 1932 Nozzle
- NOZ-LR Long Radius Nozzle
- NOZ-ASME ASME Throat Tap Nozzle