Industrial Centrifugal Pumps from Kelair Pumps Australia

Case Study
Sales Engineer Chandan Patwardhan (VIC)

Goulds pumps prove very cool

A dairy plant in Victoria required two centrifugal pumps for its new cooling tower.

The customer had existing DIN-standard centrifugals and wanted to salvage same.

Application: Water at 28°C for twelve different cooling tower duties:

• 423 m3/hr at 520 kPa max duty point
• 276 m3/hr at 242 kPa normal duty point
• 30 m3/hr at 216 kPa min duty point

Kelair was given the task of evaluating and submitting a technical solution for the application. The scope of the project was to propose installation / duty and confirm suitability of existing pumps.

It was found the existing pumps were not economically viable considering the cost to refurbish them, so two new Goulds ISO centrifugal pumps were offered.

The customer wanted to run both pumps in parallel. From various concepts that were considered, one was for the maximum duty point of 520kPa at 423 m3/hr for the two pumps.

An impeller was selected that would run the first pump up to 55 Hz and to a duty point of around 375 m3/hr at 500 kPa.

The second pump would kick in and the first pump would back off to around 51 Hz and 100 m3/hr.

Both pumps will then run up to a maximum of 55 Hz on pump one and 50 Hz on pump two, making a total system capacity of around 650 m3/hr at 500 kPa if required.

The first pump would not run faster than 55 Hz, so 75kW motors were proposed. Thus a technical solution to the customer's problem was achieved.