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.
  • Icon/Logo for Total 3D linearisation
  • Icon/Logo Security Integrity Level 2/3 (SIL 2/3)

Venturi flowmeter – redundant DP flowmeter assembly with Venturi tube, condensate pots, process valves, manifolds, DP transmitters, pressure transmitter and temperature sensor

DP flowmeter with Venturi tube, DP transmitters, condensate pots, manifolds, temperature assembly and pressure transmitter

The Venturi flowmeter is based on a classical Venturi tube, an engineered primary flow element for a most efficient and accurate differential pressure (DP) flow measurement. Thanks to its design, it has an excellent resistance to wear and doesn’t require any maintenance. The service life of the Venturi element is usually equal to the one of the entire plant. It is therefore often the ideal choice in live steam applications of power plants, wet gas flow measurement in natural gas production or CO2 injection, flow measurement of hydrocarbons and LNG as well as in gas-to-liquid processes and refineries. KROHNE offers the complete flowmeter assembly with the Venturi tube, DP transmitter, valves, accessories, engineering, testing and documentation from a single source.

Venturi tubes have one of the lowest permanent pressure loss among all primary elements, contributing to considerable energy conservation and cost savings. KROHNE offers the full range of Venturi tube designs to meet the specific application conditions. Depending on the line size and pressure rating, the Venturi tube will be made of barstock material or sheet metal. Special materials for harsh conditions are available as full material option or often also as cost-effective plasma surface coatings. Special constructions such as redundant tappings, inlet/outlets runs or flow conditioners in accordance with relevant standards (ISO 5167, etc.). can also be supplied.

The throat section and all internal welding are machined to assure perfect surface conditions and flow performance. Welds are outside of the cone-throat transition which makes the construction more precise and rugged compared to standard welded designs.

The sophisticated OPTIBAR DP 7060 and OPTIBAR DP 3050 DP transmitters are the perfect companion for this DP flowmeter solution. They are 3D linearised and ensure advanced performance even at high static pressures. The OPTIBAR DP series has an outstanding long-term stability and a low total cost of ownership with a reduced need for field calibrations.

Product highlights

  • Flowmeter assembly for the highest requirements of accuracy and long-term stability
  • Only short straight inlet/outlet pipe sections required
  • Very low remaining pressure drop
  • Fully machined or welded/machined design for perfect surface conditions and flow performance
  • Manufacturing and calibration capabilities up to 48"
  • Special 20-point calibration at high Reynolds-numbers possible (e.g. acc. to ASME PTC)
  • Specific versions for acceptance testing, wet gas, geothermal steam, CO2 hydrocarbons and others available
  • Reduced engineering, commissioning and installation costs
  • Reduced TCO due to reduced need for recalibration in the field through advanced 3-D linearised OPTIBAR DP transmitters
  • Complete flowmeter solution with Venturi tube, DP transmitter, flow computer, valves, accessories, engineering, testing and documentation from a single source
  • Redundancy available (1oo2, 2oo3)
  • HART®7, Foundation fieldbus and Profibus-PA communication options
  • SIL 2/3 certified versions
  • Ex ia, Ex d approvals
  • International references with renowned EPCs

Typical applications

  • Feedwater and steam flow measurement at power plants
  • Acceptance testing
  • Hot gas flows in thermal processes
  • Geothermal steam flow and quality measurement
  • Flow measurement in oil and gas production e.g. gas lift
  • CCS / CO2 injection
  • Liquefied hydrogen (LH2)
  • Measurement of cryogenic flows e.g. liquefied natural gas (LNG)
  • Wet gas flow measurement
  • Refined products flow measurement

Accessories for this product

OPTICHECK Mobile

Mobile app for wireless device commissioning, verification and monitoring

  • Wireless commissioning and device parametrisation via secure Bluetooth connection
  • Verification without measurement interruption
  • Monitoring of meter performance and application parameters
  • Free download for iOS and Android

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Related products

OPTICHECK Pressure Mobile

Mobile app for pressure transmitters

  • Works with all OPTIBAR PM 5060, OPTIBAR PC 5060 and OPTIBAR DP 7060 equipped with Bluetooth display and adjustment module
  • Wireless device commissioning, verification and monitoring even in hard-to-reach areas
  • Parameterisation similar to PACTware DTM including remote SIL mode activation
  • Free download for iOS and Android

View product details

OPTIBAR PM 3050

Pressure transmitter for general pressure and level applications

  • Compact design with recessed or flush metallic diaphragm and optional display module
  • 0.1…100 bar / 1.45…1450 psi
  • Thread: G½, ½ NPT (male, female)
  • 2-wire 4…20 mA/HART®

View product details

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

View product details

OPTIBAR PC 5060

Pressure transmitter for advanced process pressure and level applications

  • Robust design, with corrosion and abrasion resistant ceramic diaphragm
  • 25 mbar…100 bar / 0.73…1450 psi; max. +150°C / +302°F
  • Various threads, flanges, hygienic and other connections
  • 2-wire, 4…20 mA, HART®, FF, Profibus-PA, Bluetooth®

View product details

OPTIBAR PM 5060

Pressure transmitter for process pressure and level applications

  • Rugged design with fully welded metallic diaphragm suited to high pressure ranges and hygienic requirements
  • 100 mbar…1000 bar / 1.45…14500 psi
  • Various threads, flanges, aseptic and other connections
  • 2-wire 4…20 mA/HART®, FF, Profibus-PA, Bluetooth®

View product details

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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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

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OPTITEMP TCA-T30

Thermocouple (TC) temperature assembly for higher flow velocities and pressures

  • Weld-in connection
  • DIN-style based on form 4, barstock thermowell with tapered tip
  • -40…+600°C / +1100°F

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OPTITEMP TCA-TF31

Thermocouple (TC) temperature assembly for higher flow velocities and pressures

  • Flange connection
  • DIN-style based on form 4F, barstock thermowell with tapered tip
  • -40…+600°C / +1100°F

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OPTITEMP TCA-TF56

Thermocouple (TC) temperature assembly for higher flow velocities and pressures

  • Flange connection
  • ASME-style, barstock thermowell with tapered tip
  • -40…+600°C / +1100°F

View product details