Increasing reliability and efficiency in the Netherlands

Overview_TEXT

Overview

Waternet Amsterdam, the service organisation for Amsterdam municipal water utility, and Grundfos Netherlands recently installed two 7.5 kW and two 22 kW SE wastewater pumps with S-tube® impellers at the Kasterleepark and Oslofjordweg pumping station. The initial plan was for a wet-pit pumping station at Oslofjordweg; however a dry-installed pumping station met Waternet’s requirements for an easy-to-service and reliable solution with cost savings for many years ahead .

The situation
The area where the pumping station is located is being developed by the municipality for recreational purposes. A permanent, year-round boat show has been
built, which is expected to attract 30,000 visitors per year. In addition, old factories have been turned into office buildings and further developments are planned, such as hotels, restaurants and entertainment.

The capacity of the old dry-installed Oslofjordweg pumping station was therefore too low. With this in mind, the
Amsterdam municipality first designed a wet pit, because this requires little space, and space was at a premium in this area. The municipal engineering department calculated the cost of a new wet pit at approximately EUR 300,000.

However, the serviceability of a dry pit is much easier than a wet pit, and Waternet
decided to engineer a dry pit design with new pumps and frequency converters which could handle the wastewater load now and in the future. Kasterleepark pumping station was running old, dry-installed pumps, which needed replacement. The focus here was on a future reduction of costs connected with operation,
inspection and service.

The Grundfos solution
Following a complete calculation for a dry pit installation with all the existing piping network and required flows, Waternet concluded that using SE wastewater pumps with Grundfos S-tube® impellers would guarantee the maximum capacity required and reduce costs for installation and service. Grundfos Netherlands then engineered the best possible wastewater pumping solution using 7.5 kW and 22 kW SE wastewater pumps with S-tube® impellers, which offer outstanding non-clogging capabilities. Grundfos SE wastewater pumps are designed for both submersible and dry installation, depending on the requirements of the customer.

The 22 kW dry-installed SE wastewater pumps were selected as replacement pumps together with frequency converters and new piping at the Oslofjordweg pumping station. The easy access offered by dry installed pumps and the quick-release bolts on the 22 kW SE wastewater pumps ensure cost savings on inspection and service for the pump lifetime. The final cost of the completed renovation was around EUR 40,000, substantially down on the initial
calculation of EUR 300,000 for a wet-pit installation only.

The 7.5 kW SE wastewater pumps were installed at the Kasterleepark pumping station, where they replaced existing dry installed pumps. Installed horizontally, the easy to open clamp construction used on the smaller SE wastewater pumps ensures extremely straightforward inspection and service, which can be done by just one person .

The outcome
The maintenance department at Waternet Amsterdam are very satisfied with the 7.5 kW and 22 kW SE wastewater pumps with S-tube® impellers. This was the first major order for wastewater pumps with S-tube® impellers received by Grundfos Netherlands, and the installation continues to work properly.

The pumps have now been running for more than one year without any clogging, jamming or other incidents, and Waternet is very satisfied with the performance of the SE wastewater pumps with S-tube® impeller.





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Topic:

Two 7.5 kW and two 22 kW SE wastewater pumps with S-tube® impellers installed in new pumping station with increased capacity

Location:

Amsterdam, Netherlands (Kasterleepark and Oslofjordweg pumping station)

Company:

Waternet (The service organisation for Amsterdam municipal water utility)

SE 7.5 kW
Installed horizontally, the easy to open clamp construction used on the smaller SE wastewater pumps ensures extremely straightforward inspection and service, which can be done by just one person.
S-tube®  impeller
The SE pumps with the S-tube® impeller give the highest efficiency over a wide range and the largest free passage providing reliable and trouble-free operation with lower energy consumption.
Mr Tander
Mr. Jan Tander was engineer at the Oslofjordweg pumping station
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Contact

If you need a similar solution, please contact us for further information.

Contact

If you need a similar solution, please contact us for further information.