Flow nozzle
Engineered primary element for DP flow measurement of high velocity, non-viscous or erosive fluids
- ISA 1932, long radius and Venturi nozzles
- Standards: ISO 5167, ASME MFC-3M or ASME PTC 6
- Only short inlet and outlet runs required
Overview
A flow nozzle is an engineered primary flow element for non-viscous and erosive fluids under high velocity and pressure, which would wear or damage orifice plates. Flow nozzles are either integrated into pre-assembled meter runs, designed to be mounted in between flanges or welded into the pipe. They require less straight upstream piping and incur lower permanent pressure loss in comparison to orifice plates. There are no sharp edges exposed to wear. A number of different flow nozzle types are available, e.g. a throat tap long radius ASME PTC 6 nozzle that is typically used for performance testing of steam turbines.
ISA 1932 nozzle
Long radius nozzle
Venturi nozzle
Features & Options
Product features and options depend on device configuration: Contact us to make sure that your preferred functionality can be combined in one device.
- Typical uncalibrated uncertainty up to ±0.8% (ISA-1932 nozzle); Optional accredited wet calibration at operating Reynolds number for uncertainties up to ±0.2%
- Typical pressure loss down to 5% of the generated DP (Venturi nozzle)
- Materials: Carbon steel, stainless steel and special materials
- With weld ends, flange connection or for mounting between two flanges within the bolt circle
- With optional annular chamber and multiple pressure taps (redundancy)
- Size: 2…24″ (60...630 mm) per standard, larger sizes upon request
- Low maintenance and long life with low total cost of ownership (TCO)
- Available as pre-assembled meter run with weld-in flow nozzle