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Volumetric Efficiency

The volumetric efficiency describes the ratio between the actual amount of liquid pumped and the theoretically possible output of a pump. It indicates how efficiently a pump transports the medium without leakage or backflow. A high volumetric efficiency is significant for processes that require precise and constant pumping.

Factors such as wear, clearances, viscosity of the medium and backflows within the pump can influence the volumetric efficiency. Particularly displacement-based pumps such as progressing cavity pumps, rotary lobe pumps, multi screw pumps or peristaltic pumps are characterised by high volumetric efficiency, as they transport the medium in clearly defined pumping chambers and minimise leakage losses.