Flow Nozzle

Product Summary

The Flow Nozzle is a pressure differential flow measurement instrument, known for its aerodynamic design that results in lower line loss and reduces residue accumulation in the orifice. This instrument is particularly suitable for steam measurement, where the process velocity is high. Its unique features make it an exceptional choice for applications where efficiency and precision are essential.

Main Features:

  • Versatility in Applications: Applicable in lines with high velocities or in the presence of abrasive materials.
  • Reduction of Permanent Pressure Loss: Minimizes fluid resistance, improving system performance.
  • Ideal for Steam Measurement: Due to its ability to handle high process speeds.
  • Aerodynamic Profile: Reduces instrument wear, extending its lifespan.

Operation: The Flow Nozzle consists of a nozzle designed according to established standards, where the instrument's body is centrally positioned perpendicular to the pipe axis. This configuration alters the fluid flow profile, generating a pressure differential that is measured and interpreted to represent the process flow. The operating principle is based on the continuity and Bernoulli's equations.

Main Applications:
  • Mining and Energy
  • Water and Sanitation Treatment
  • Oil and Gas Industry
  • Petroleum Refineries
  • Chemical and Pharmaceutical Industry
  • Food and Beverage Industry
  • Pulp and Paper
  • Steel Industry

Technical Specification:

  • Uncertainty: ISA Nozzles: 0.8%, Long Radius Nozzles: 2%, Venturi Nozzles: 1.7% to 2.4%.
  • Repeatability: 0.1% (dependent on the transmitter).
  • Rangeability: 10:1.
  • Beta Ratios Limits: 0.3 to 0.8 for ISA Nozzles; 0.2 to 0.8 for Long Radius Nozzles; 0.316 to 0.775 for Venturi Nozzles.
  • Pressure Loss: Dependent on β and ΔP.
  • Straight Run Requirement (minimum internal diameter D length measurements): Refer to technical specifications for accurate information ([email protected]).

Construction Material: Carbon Steel, Stainless Steel 304, 316, Duplex, Super Duplex, WC6, WC9, WC12, F11, F12, F22, F91, Monel 400, special materials available upon request. Line Diameters:

  • ISA Nozzles: 2" to 20"
  • Long Radius Nozzles: 2" to 26"
  • Venturi Nozzles: 3" to 20"


  • Welded
  • Flanged

Instrument Tap Connections:

  • ½" NPT, ½" SW, ¾"NPT, ¾" SW, 1 NPT, 1 SW, with pressure classes of 3000#, 6000#, and 9000#.

Applicable Standards:

  • ISO 5167
  • ASME

The Flow Nozzle is a reliable and effective choice for accurate flow measurement in various industrial applications. Its ability to minimize pressure losses and handle high process speeds makes it a versatile and durable instrument to meet the needs of different sectors. Contact us to learn more about how the Flow Nozzle can enhance your flow measurement system.

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