How to troubleshoot your Centrifugal pumps?

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Process Equipment troubleshooting serial

Tip summary

·      The objective of this serial is to provide engineers with easy to use root cause analysis maps that can help them to easily troubleshoot the plant equipment and restore the equipment quickly to the good operating condition to save energy & cost.

·      In this video we will talk about liquid moving devices especially centrifugal pumps troubleshooting.

·      Centrifugal pumps major problems root causes can be summarized in the following points

1. No liquid delivery possible causes:

  • Instrument error and it need to be checked.
  • The pump is not primed properly.
  • Could be due to cavitation and we need to check the operation parameters and pump internals.
  • Could be due supply tank is empty and we need to check the level before operating the pump.

2. Liquid low flow possible causes:

  • Instrument error and it need to be checked.
  • Could be due to cavitation and we need to check the operation parameters and pump internals.
  • Could be due to presence of non condesibles (air or other gases).
  • Could be due to blockage of suction strainer.

3      Intermittent operation Discharge pressure high possible causes:

  • Could be due to cavitation and we need to check the operation parameters and pump internals.
  • The pump is not primed properly.
  • Could be due to presence of non condesibles (air or other gases).

4      Discharge pressure low possible causes:

  • Instrument error
  • Could be due to presence of non condesibles (air or other gases).
  • The pump speed is low (check the variable speed drive control)
  • Wrong direction of the installed impeller.

5      Excessive power demand possible causes:

  • The pump speed is too high (check the variable speed drive control)
  • High liquid density due to change in temperature conditions or contamination.
  • Change in system head due to modifications.
  • High viscosity due to change in temperature.

Tip video

 

Link to download the troubleshooting map

Troubleshooting serial

Tip 2.1 Centrifugal pump troubleshooting map

Tip 2.1 Centrifugal pump troubleshooting map

My blog: www.360proactiveengineer.com

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Magdy Aly

Energy manager, Energy efficiency consultant Passionate to help others to save Energy and Environment.

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