DVZ - Vortex Flow Meter and Switch

Brand: KOBOLD Instruments, Inc.

KOBOLD DVZ inline vortex flow meters for low viscosity liquids feature a long service life and low maintenance as they do not utilize a mechanical means of measurement, where components can break or wear out, and are the perfect solution for applications requiring reliability and low cost.

The DUK is available with a PPS body and your choice of either nickel-plated brass or 316 stainless steel fittings.

The bluff body is available in either the standard PPS or optional ceramic material, which has excellent long-term wear characteristics even under harsh operating conditions.

Available outputs for the DVZ include pulse frequency, 4-20 mA, adjustable relay, and compact electronics with LED digital flow rate display, 4-20 mA output and adjustable transistor switch options.

The DVZ senses flow rate using the vortex-shedding principle. A small obstruction, known as a bluff body or shedder-bar, is placed within the flow path.

As flow occurs past the bluff body, small low-pressure vortices (swirls) are created just behind it. The vortices alternate to either side of the bluff body in a uniform pattern and the frequency of the vortex shift is directly proportional to flow rate.

A very sensitive pressure sensor is used to detect the shifts and a scaled flow rate signal is produced.
Features
  • Vortex Shedding Technology with No Moving Parts
  • PPS Body with Ni-Plated Brass or SS Fittings
  • Outputs: Analog, Frequency, Switching, Digital Flowrate Indication, Batching and Totalizing Electronics
  • Fixed or Rotatable Connections

Specifications

Range

  • 0.13-1.2 GPM to 2.7-26 GPM

Fittings

  • 1/4” to 1” NPT
  • G 1/4 to G 1 Threads

Fitting Material

  • Ni-Plated Brass
  • Stainless Steel

Maximum Pressure

  • 145 psig / 290 psig

Maximum Media Temperature

  • 176° F

Accuracy

  • ± 2.5 % of Full Scale

Media Category

  • Liquid

  • Ideal for Aggressive, High Purity, or Salty Solutions

Documentation

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