Positive Displacement Flowmeter


isolvPositive Displacement Flowmeter. The measuring chamber of the iSOLV Bi-Rotator positive displacement flowmeter consists of a body, a pair of rotor gear and a top cover. A cavity with a known volume is formed and functions as the measuring chamber of the flowmeter.

The bi-rotators rotate under the minimum change in pressure between the inlet and outlet. Rotations send the liquid from the inlet to the outlet. The rotation of the two rotators is directly proportional to the volume of liquid passing through.

The mechanical rotations of the bi-rotators are transmitted to a mechanical totalizer or electronic counter for flowrate and totalizer display.


  • High accuracy up to 0.1%
  • Low pressure loss
  • Wider viscosity range
  • Low noise and vibrations
  • Longer service intervals
  • Economical maintenance
  • Choice of cast steel or stainless steel construction
  • High temperature capability up to 250°C
  • Option for heat tracing of the meter body


Marine / Offshore - Heavy fuel oil, desel oil and Palm oil

Technical Details
Sizes DN15 to DN400
Connection Flanges according to DIN / ANSI/ JIS
Pressure Rating Up to PN64
Temperature Rating Standard: 80°C
Optional: 150 / 250°C
Material of Construction Standard: Cast Steel
Optional: SS304 or SS316L
Accuracy Class Standard: 0.5%
Optional: 0.2%
Maximum Fluid Viscosity 20,000 mPa.s
Measuring Range Please refer to the catalogue
Other Option Heating jacket for fluids with high viscosity
Note: Specifications are subject to change without notice.

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