Gerotor Pumps

High-Speed Operation, Constant & Even Discharge Regardless of Pressure.

A Gerotor is a positive displacement pump consisting of an inner and outer rotor. The outer rotor has one more tooth than the inner rotor and has its centerline positioned at a fixed eccentricity from the centerline of the inner rotor and shaft. Gerotor pumps are internal gear pumps without the crescent. The rotor is the internal (drive) gear, and the idler is the external (driven) gear.

As the rotors rotate about their respective axes, fluid is drawn into the enlarged chamber to a maximum volume. As the rotation continues, the chamber volume decreases, forcing fluid out of the chamber. This process occurs constantly in each chamber, providing a smooth pumping action.

This type of pump is primarily used in clean, low-pressure applications such as lubrication systems or hot oil filtration systems. They can also be found in a low to moderate pressure hydraulic application.

GSGR offers a wide variety of pumps from well-known brands all with unique performance characteristics which are designed for superior, efficient system performance. Browse below to find an extensive range to choose from. Can’t find what you are looking for, the GSGR design team provides application assistance to determine your pump needs, contact us today to discuss your application needs.