High Speed Pumps

The process industry uses pumps that run at speeds as high as 30,000 to 40,000 rpm. There are several reasons you might want to run at these elevated speeds:

  • You need a high head pump, but you have need for a capacity greater than can be supplied by a rotary design. Instead of throttling a centrifugal pump, the high speed design may allow you run close to the pump’s best efficiency point (BEP)
  • Too save cost. Large impellers and multistage pumps can be very expensive.

These higher speed can be obtained by:

  • An electric motor running through a gear box.
  • A diesel or gasoline engine
  • A turbine of some type.

There is a down side to high speed operation.

  • Erosion and abrasive wear can be a problem.
  • The pump is more likely to cavitate. These pumps are almost always equipped with an inducer.
  • Sealing becomes a more severe problem for both the product and the bearing oil seals.
  • Bearings are subject to more heat related problems.
  • Operating off the BEP. (best efficiency point) causes more severe shaft deflection problems



  • On February 15, 2018