Micropump Gear Pumps - Cavity Plate v Suction Shoe Style Selection Guide

PUMP ATTRIBUTE	CAVITY PLATE GD, GJ, GJR, GL, GM, GN	SUCTION SHOE GA, GAF, GB, GC	REMARKS
Flow v Differential Pressure			Pressure Loading in the suction shoe pump creates the ability to maintain more consistent flow at high differential pressures. Suction shoe offers best in class performance
Temperature Performance			Suction shoes provide thermal expansion space for gears and shoes, thus increasing temperature operational range. Gears/shoes of similar materials perform optimally over a large temperature range. Suction shoe offers best in class performance.
Flow Rate			Both pump styles are positive displacement pumps and generate similar flow rates for a given gear size and geometry.
Chemical Compatibility			Both pump syles are manufactured with materials that are chemically compatible with a wide range of fluids.
Reversibility			The suction shoe is not well suited for bi-directional flow.
Dry Lift			The suction shoe does not dry lift well due to lack of pressure loading.
Wet Lift			Both pump styles can generate lift in a primed system.
Torque Required			The high hydraulic efficiency of the suction shoe does require a small amount of additional torque over the cavity style.