Advantages

Delivery repeatability: Gear pumps need a lesser Npsh (showing a better negative suction head) and have better properties of delivery repeatability.

Best for metering: Gear pumps, being rotary volumetric pumps, are the best metering pumps, since their delivery depends directly on the revolutions rate. Also gear pumps will not generate flow pulsations, as standard metering pumps do, making the media flow constant.

Delivery unaffected by wear:  Gear pumps delivery and revolution ratio won’t be affected by use and work, if provided viscosity and differential pressure are kept constant. Any small delivery loss, due to normal wear and wear of the rotating parts, will be easily corrected and compensated for by an equally slight rise in revolution rate.