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DRINKING WATER
efficiency. The most recent investment has been to refurbish and
expand the pumping facilities through the replacement of ageing
pumps with purpose-designed units manufactured by KSB,
which have brought output up to 700,000m³ per day of drinking
water for a large area of Montréal Island.
As part of the project involving the refurbishment of equipment at potable water production plants, pumping stations and
reservoirs (REQUP 1), the City of Montréal launched a public
tender for the pre-purchase of six new motor-pump sets (MPS)
and their components in 2018. This would include medium
voltage synchronous electrical motors with exciters, switchgear
cabinets, all to replace the ageing high-pressure pumps in the
Atwater potable water pumping station.
The very nature of the project, being a complete replacement
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WATER C AN ADA • NOV EMBER/ DECEMBER 2024
of the pumps in an existing pumping hall, presented a number of
challenges for KSB’s engineers to address, not least of these being
the design of the pump specified by the client. In the terms of the
contract, the pump manufacturer would be responsible for the
supply of the pumps and all related electrical components, as well
as assisting in the installation of the units, their commissioning,
testing and post-commission personnel training. The key to the
project was that the pumps had to be centrifugal single-stage
horizontal split-case, double-suction, double-volute pumps with
bottom entry suction and discharge on the horizontal side. The
requirement for bottom suction entry and side discharge was
dictated by the existing piping infrastructure within the pump
house. Being an existing pump station, it was critical to ensure
that the dimensions of the equipment to be supplied complied
WAT E R C A N A D A . N E T
