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Rotary Abutment Flow Meters Working Principle

Rotary Abutment Flow Meter are another form of positive displacement flow meter. As there is no metal contact within the chamber they have a long service life, also maintaining accuracy too.

They have a wide viscosity range making them suitable with many types of fuels & lubrication fluids. The rotors are connected to timing gears, so each time a rotor turns, the displaced volume is transferred to the register and the controller calculates the flow.

Rotary Abutment Flow Meter

Rotary Abutment Flow Meters Working Animation

Credits : hytekflowmeters.com

There is no metal-to-metal contact between the rotors and housing walls, which prolongs the life of the flow meter.


  • Sweeping action of vanes prevents buildup of sediment and keeps compartment clean.
  • Wide choice of construction materials.
  • High accuracy and repeatability.
  • Low pressure drop over entire range of flow measuring capabilities.


  • Relatively complex design increases cost.

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Rotary Abutment Flow Meters Working Principle

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