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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.

U slučaju abrazivnih i korozivnih primjena, normalno je da će se u određenim komponentama dogoditi snažnije trošenje. S obzirom na gornju primjenu trošenje se može odvijati uglavnom u radnom kolu, miješalici, usisnoj ploči, rukavcu osovine, uljnom prstenu, mehaničkoj brtvi, kućištu pumpe, cjedilu, kućištu motora i ispusnoj spojki. Ovisno o radnim uvjetima vijek trajanja tih dijelova može značajno varirati i može biti kraći od pravnog zakonskog razdoblja.
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