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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.