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Steam Flow Meter - Vortex Meter

Vortex flow sensing technology relies on measuring the number of vortex pulses generated by a bluff body immersed in the flow stream. A piezo-electric sensor mounted outside of the fluid flow serves as a transducer to convert the vortex pules into electrical pulses which are then counted and converted into useful engineering units by the microprocessor in the meter's display module. By utilizing a design that is free of moving parts and having a transducer that is isolated from the process fluid, the vortex meter offers a number of advantages including low pressure drop, long service life, good particle tolerance, and compatibility with a wide array of fluids. Vortex technology is one of the few flow measurement techniques that is capable of measuring liquids, compressed gases, and steam. SMC's ALVT Series meters are available for line sizes ranging from ½" through 20" and are offered with in-line flanged or wafer style mounting as well as insertion-type with an optional hot-tap ball valve. The ALVT may be calibrated for liquid, gas, or steam service and is available with integrated temperature and pressure measurement for performing compensated mass-flow calculations.

Process Connections wafer(standard),Flanged; insertion
Process temperature 23~482 °F (-5~+250 °C) (with LCD display)
Operating pressure 232 psi (1.6MPa) std; up to 928 (6.4 Mpa) optional
Velocity Range Depends on fluid, pressure and temperature: Liquids: ≤ 0.6~6 m/s Gas & Steam: ≤ 7~45 m/s Steam: ≤ 230 fps (70 m/s)
Accuracy 1.0% for liquid, 1.5% for gas and steam
Repeatability 0.33% for liquid, 0.5% for gas and steam
Turn down ratio 10:1 (liquids)
Material SS #304 (housing), Carbon Steel (standard flange)
Signal output Pluse output, 2-wire 4~20mADC, RS485, Hart, ModBus
Housing Protection IP65; IP67
RAM Back-up Lithium Battery, 3.6VDC
Cable 30' (10 m) included for remote version
Weight Wafer: 22~29 lbs (10 ~ 13kg) to 12" (DN300) Insertion: 12 lbs (5.5 Kg) to 20" (*DN500)
Ex-protection II B T4; Exib II C T 4
Signal Interface RS485, HART
Display Units m³/h, kg/hr.
Power Supply 110/220 VAC or isolated 14~36 VDC
NIST traceable Liquids and gasses only
Data storage EPROM storage up to 5 years
Related Files:
  • Suitable for a wide variety of applications with steam, gas, and liquid medias
  • No moving parts, high reliability and durability
  • Piezo-electric sensor isolated from the process fluid
  • Error messages displayed for or erratic flows and flows outside of calibrated ranges
  • Field calibration possible with integral or remote electronics and keypad
  • True 2-wire 4-20 mA interface
  • Wide measuring range, turn-down ratio of 10:1
  • Insertion meters can be installed vertically, horizontally or in angled pipelines
  • Available and an integrated mass flow vortex
  • ALVTIS (insertion) can be hot-tapped with ball valve and retractable assembly

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