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
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
Related products
Venturi flowmeter
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.
OPTIBAR DP 3050
Differential pressure transmitter for general flow, level and differential pressure applications
- 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
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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