Orifice Plates

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.

Applications of the orifice plates:

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

Special Features of the orifice plates:

  • Max. operating temperature and pressure limited by material and flange
  • Suitable for liquid, gas and steam flow measurement
  • Accuracy ≤ ±0.5 % of actual flow rate
  • Repeatability of measurement of 0.1 %

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 and Multi-stage spools
  • Integral tapping connections
  • Butt-weld or slip-on pipe connections
  • ASME B16.36 & ASME B16.5

Sizing and selection is simplified by use of McMenon Solve,
available to download now

For more details

Flow Measurement Selection & Practice guide