Factors Affecting Progressive Cavity Pump Efficiency

  • Progressive cavity pumps are widely used in various industries due to their high efficiency. However, there are several factors that can impact the efficiency of progressive cavity pumps. This article explores the key factors and how to optimize pump performance.

    Viscosity of Fluid

    The viscosity of the fluid being pumped is one of the most critical factors affecting progressive cavity pump efficiency. Higher viscosity fluids require more energy to pump, reducing efficiency. It’s essential to select the right pump size and configuration based on fluid viscosity to optimize performance.

    This image shows a diagram of a progressive cavity pump efficiency system, with components like the pump, motor, control valve and pressure sensor. The system helps convey viscous fluids effectively.

    Speed of the Pump

    Pump speed is another crucial factor, as higher speeds can increase efficiency but also wear and tear. It’s important to balance speed and efficiency for optimized performance. Operating at the optimum speed indicated by the pump’s progressive cavity pump performance curve maximizes progressive cavity pump efficiency.


    Regular maintenance like replacing worn parts is essential to maintain efficiency. Neglecting maintenance can allow parts like the rotor and stator to degrade, reducing progressive cavity pump efficiency. Proper lubrication and cooling also prevent overheating and damage.


    How the pump is installed can also impact its efficiency. Poor installation can introduce turbulence and resistance into the fluid flow, negatively influencing progressive cavity pump efficiency. It’s important to install the pump according to manufacturer guidelines.

    In summary, viscosity, speed, maintenance and installation are key factors that determine progressive cavity pump efficiency. Understanding their effects and optimizing them per the manufacturer’s recommendations helps ensure maximum pump performance over the long term.

    Performance Curves

    Pump performance curves provided by manufacturers graphically show how efficiency and other parameters change relative to variables like flow rate, pressure and speed. Referencing these curves helps specify and operate pumps for optimal progressive cavity pump efficiency.

    This table shows an example progressive cavity pump performance curve indicating flow rate, head pressure and efficiency at different operating points.

    For more information on factors affecting progressive cavity pump efficiency, see progressive cavity pump efficiency on