Flange Vortex Flowmeter

High-accuracy liquid flow measurement in small pipelines, compact threaded design.

Approved by：CE, SIL-3, ATEX Explosion-proof certification

The flange vortex flowmeter is a robust, all-purpose instrument for measuring the flow of liquids, gases, and steam in industrial pipelines. It uses the Kármán vortex principle—counting vortices generated by a bluff body—to deliver stable, repeatable results without any moving parts.
Built for reliability, it maintains accuracy even in harsh environments with high temperature or pressure. The meter supports pulse, 4–20 mA, and RS-485 outputs and can be supplied with temperature and pressure compensation to provide direct mass or standard-volume flow.
With a simple flange installation and no mechanical wear, it offers long service life, low maintenance cost, and dependable performance for process control, energy management, and utility metering.
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  • Nominal diameter (flanged): DN15–DN300 (above DN300 available as insertion type)

  • Accuracy (pipeline type): ±1.0% or ±1.5% of reading (depending on model); insertion type typically ±2.5%

  • Repeatability: ≤0.2% (liquid); ≤0.5% (gas/steam)

  • Range ratio (turndown): 1:6 to 1:30 (typical 1:10–1:20 depending on size and medium)

  • Velocity ranges (reference): Liquid 0.4–7.0 m/s; Gas 4–60 m/s; Steam 5–70 m/s

  • Medium temp: −40 °C to +280 °C

  • Ambient conditions: −20…+55 °C (display type); −40…+65 °C (non-display); RH 5–90% (non-condensing)

  • Wetted materials: 1Cr18Ni9Ti stainless steel (others on request)

  • Electronics / enclosure: IP65 standard; sensor options up to IP68 (immersion)

  • Power supply options: 12 VDC, 24 VDC, or 3.6 V lithium battery (integrated display type)

  • Explosion-proof: Intrinsically safe Ex ia IIC T6 Ga or flameproof Ex d IIB T6 

  • Protection: IP65 standard; IP68 available for submerged sensor types

  • No moving parts — Because the sensor reads vortices, there’s nothing to wear, so accuracy stays stable with low maintenance.

  • Wide medium compatibility — Because it measures liquids, gases, and steam with one body, you standardize on one platform across the plant.

  • High accuracy options — Because pipeline models reach ±1.0% or ±1.5% (options), you can use results for control and internal settlement.

  • Strong anti-interference design — Because the probe and DSP filtering resist vibration and noise, you get a clean, reliable signal in tough sites.

  • Broad turndown — Because the range ratio reaches up to 1:20 (and higher by model), one meter handles normal and low flows.

  • High-temperature service — Because specialized sensor sets cover up to ~350 °C (model-dependent), you can meter steam and hot utilities.

  • Multiple outputs — Because pulse, 4–20 mA, and RS-485/HART are available, you integrate easily with PLC, DCS, and SCADA.

  • Explosion-proof options — Because intrinsically safe or flameproof versions are available, you can install in hazardous areas with confidence.

  • Flexible power — Because you can choose 24 VDC or lithium-battery (local display), the meter fits both permanent and retrofit jobs.

  • Integrated flange vortex meter with local LCD + 4–20 mA

  • Split-type (converter remote from high-temp pipe)

  • Temperature/pressure compensation version for saturated steam and gas

  • RS-485/Modbus/HART communication module

  • High-temperature probe with radiator

  • Explosion-proof housing for Zone 1/2

  • Steam metering in boilers, heating systems, district energy, and food/pharma plants

  • Compressed air measurement in factories for energy management

  • General plant gases such as nitrogen, oxygen, CO₂, natural gas (clean, dry)

  • Industrial water and circulating cooling water in power and chemical plants

  • Petrochemical and chemical pipelines where no moving parts and high temperature are important

  • Utility metering inside industrial parks and workshops

  • HVAC / heat-supply networks measuring hot water or steam to user branches

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