Positive Displacement Pumps

Positive Displacement Pumps


This is the fifth lesson in the Industrial Hydraulic Power Course. This lesson describes various positive displacement pumps and their components. The lesson explains some of the causes of system inefficiencies associated with fixed volume pumps and describes applications in which variable volume pumps are used.

Module Objectives

  • Identify components of fixed and variable volume vane pumps, describe their functions.
  • Identify components of bent axis and axial piston pumps, and describe their functions.
  • Explain causes of system inefficiencies associated with fixed volume pumps.
  • Describe applications for variable volume pumps.


This course consists of thirteen lessons. These lessons were designed for beginning hydraulic technicians as well as mechanics, electricians, operators, and for those individuals who need to learn more about industrial hydraulic power. The lessons in this course train participants to identify system components, read schematics, and understand the conditions necessary for proper operation of a hydraulic system.


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