Pump Performance

Predicting Your Pumps Performance

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Typically, centrifugal pumps are used for high volume, mostly industrial applications such as batch transfer or evacuating tanks. Users want efficiency in the form of a high flow rate without a hefty price tag. The high flow rate can be compromised by a setup that generates high pressure. When the maximum pressure is reached, the pump deadheads.

When pressure is introduced into the setup, one has to find ways to safely reach the maximum flow rate. The solutions are as follows:

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(Please refer to the graph)

  • For setups that pump fluid up vertically, the company’s technical support experts can calculate the pressure
  • For those adept at reading flow curves, these curves are available to show what the maximum flow rate should be, given the application-specific pressure
  • Use a pressure gauge at the end of the line to determine the pressure; if unsure of results, contact the company’s technical support experts. With the pressure gauge reading, they will ask the desired flow rate and make a recommendation
  • When using filters, the pressure may change as the filter fouls; another type of pump such as a peristaltic pump may be advised

When choosing a centrifugal pump, select the correct pump size to compensate for the pressure generated. Experts recommend a slightly oversized pump for this reason. A more powerful centrifugal pump can handle higher maximum head pressure. One can prevent future headaches by getting a little more power than required.

* First published in PROCESS Worldwide Subcontinent Edition 01/2016

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