Flow MeasurementOrifice Plates

McMenon have an orifice plate, union or carrier for all orifice applications…

Orifice plates are the simplest of the DP flow measurement devices.

Inexpensive to replace and available in a range of materials; making them an ideal choice for applications where permeant pressure loss is not a significant factor.

Devices based on orifice plates remain one of the best selling flow metering technologies. As well as measuring flow, they are used to restrict the flowrate to a certain value or to reduce the pressure at a certain flowrate.

The technology is well-understood and thoroughly proven and is available from McMenon in a wide range of designs to suit most applications. From simple plates to metering runs, McMenon have an orifice plate, union or orifice carrier for all orifice applications – simple flow measurement, flow restriction or pressure reduction.

The orifice plate range includes: Paddle-type plates – square edged, quarter circle/conical, eccentric; RTJ plates – with male or female process connections; Orifice carriers – with integral tapping connections; Orifice metering runs – with upstream/downstream pipe sections; Complete Flanged Orifice Unions (Orifice Flange Assemblies); Restriction orifice plates

Sizing and selection is simplified by use of McMenon Solve, the ultimate tool for DP flowmeter sizing and more, used on-line
or off-line and available to download now

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Special features

  • Max. operating temperature and pressure limited by material and
  • Suitable for liquid, gas and steam flow measurement
  • Latest Specification Vertical Machining Centre (VMC)
  • Accuracy ≤ ±0.5 % of actual flow rate
  • Repeatability of measurment of 0.1 %


  • Power generation
  • Oil production and refining
  • Water treatment and distribution
  • Gas processing and transmission
  • Chemical and petrochemical industry

Pipeline size range

  • From 0.5in up to 42in