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NEAT Amsteg and Erstfeld construction sites, Switzerland

The project:

New Transalpine Railway (NEAT), Amsteg and Erstfeld construction sites

Executing company:

RL Pumpenanlagen GmbH, Wollerau

The problem:

Incoming contaminated drainage water from the tunnels are guided to the collection basin of the sand press. This was initially done with standard commercial construction pumps, but the impellers were worn out after a very short time.

Our solution:

Four GPN3-80 Tsurumi mud pumps with agitator were used. This 4-pole jacket-cooled pump is designed for use in the harshest of mud environments, so that the impeller, agitators, and suction plates are fabricated of custom-coated chromium cast iron with a Brinell hardness of 415 to 425. After 6 months of use, almost no wear could be detected.

In the event of abrasive and corrosive utilization, stronger wear and tear will take place naturally in certain components. With regards to the above application wear and tear can take place mainly in impeller, agitator, suction plate, shaft sleeve, oil ring, mechanical seal, pump casing, strainer, motor casing and discharge coupling. Depending on the working conditions the lifetime of those parts might vary significantly and can be shorter than the legal warranty period.
In this regard, please pay attention to our general terms and conditions that we also send to you by mail on request.