Venturi tube

Engineered primary element for DP flow measurement of liquids, gases and steam with the lowest residual pressure loss

  • Machined or welded design (internally machined) according to EN ISO 5167, ASME MFC3
  • Lowest residual pressure loss of all DP elements
  • Only short inlet/outlet runs required
  • From basic to special wet gas applications and high pressure conditions

Venturi tube

Venturi

A Venturi tube is an engineered primary flow element for the most efficient and accurate differential pressure (DP) flow measurement. The typical Venturi shape with limited cone angles enable a pressure recovery of up to 95% of the generated DP. Together with optional annular chambers to balance deviation in the flow profile. With low maintenance requirements and a long life the Venturi tube offers a low total cost of ownership. A special Venturi tube that enables online measurement of additional process parameters such as steam wetness can also be provided.

Product highlights

  • Typical uncalibrated uncertainty up to ±1.5%
  • Optional accredited wet calibration at operating Reynolds numbers for uncertainties up to ±0.2%
  • Typical pressure loss down to 5% of the generated differential pressure
  • Low requirements for straight inlet and outlet runs
  • Best option for large sizes and low pressure applications
  • With weld ends or flange connections
  • With optional annular chambers and multiple pressure taps
  • Size: 2…48" (50…1200 mm) per standard, larger sizes upon request
  • Low maintenance and long life with low total cost of ownership (TCO)

Typical applications

Power generation and other industries

  • Steam and gas applications with high flow rates
  • DP flow application with high accuracy requirements
  • Performance testing
  • Large line size applications
  • Geothermal steam measurement

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DP flowmeter for the highest requirements of accuracy and long-term stability

  • For acceptance testing, billing, reference measurement of steam, feedwater, hydrocarbons etc.
  • Machined or welded and internally machined design acc. to EN ISO 5167 and ASME MFC-3M; low remaining pressure loss
  • Manufacturing capability up to 48”; inhouse calibration also for applications with high Reynolds numbers
  • Complete scope of supply from one source, incl. engineering, documentation, testing, calibration, valves, Venturi, process instrumentation, etc.

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  • The most compact design in its class
  • Measuring ranges: 100 mbar…16 bar / 1.45…232 psi; Line pressure: up to 160 bar / 2320 psi
  • Reference accuracy ± 0.1%
  • 2-wire, 4…20 mA/HART®7

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OPTIBAR DP 7060

Differential pressure transmitter for flow, level, differential pressure, density and interface measurements

  • High performance DP transmitter with integrated line pressure measurement
  • Measuring range: 30 mbar…16bar / 0.44…232 psi; Line pressure: up to 400 bar / 5800 psi
  • Reference accuracy of ±0.065%
  • 2-wire, 4…20 mA/HART®, FF, Profibus-PA, Bluetooth®

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