Rotary Pump

Definition - What does Rotary Pump mean?

A Rotary Pump is a type of pump that is capable of pumping more liquid than reciprocating pumps with the same weight. The pump requires a relief valve for protecting the piping system and the pump because of its positive displacement. The relief valves help the pump to lift the pressure and return the system fluid either back to the supply tank or to the suction side of the pump. These pumps work within certain limits with the pump situated above the source of supply.

Petropedia explains Rotary Pump

Rotary Pumps have working members which move in rotary or both reciprocating and rotary motions to displace a liquid. This displacement is because of the periodic changes in the volume of cylinders and chambers filled by the liquid. The pumps are used for pumping oils and various other heavy viscous liquids. They are preferred for large torque values and low rational speeds. The classification of these types of pumps depends on the types of rotating elements and they include:

  • Lobar pumps
  • Screw pumps
  • Gear pumps
  • Labyrinth pumps
  • Vane pumps and swash-plate
  • Radial-plunger pumps.

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