Testing pumping station’s variable speed pumps

Using our patented system we solved a lasting problem at our client’s pumping station, which consists of three variable speed pumps supplying raw water from its reservoir

At the station, two pumps had different manufacturers to the third and as such could not be assumed to operate in the same way. The variable drives were also obsolete and, prior to our project, it had not been possible to obtain any information about the electro-mechanical efficiency of the motor and variable speed drive arrangement. We used our FREEFLOW portable to complete pump tests.


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Our fuller 4-page case study offers in-depth analysis of the above project. It details the assets we tested, the challenges we overcame, our approach and the results we achieved. Request a copy by completing the form below.

Our results in brief:

  • Data revealed best efficiency points for each pump and a design mismatch between these and the drives
  • Resulted in an annual saving of £56,070 (21.7%)
  • Pump 2 refurb would result in an estimated annual saving of £8,293 (10.7%)
  • Refurb costs estimated at £30,000, a pay back of 3.6years
  • Phased engineering work could deliver 49% savings

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