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Tunnel Siegkreisel, Betzdorf

The Project:


Construction of a 360 m long tunnel with three lanes as component of a municipal bypass system; completion: Spring, 2006.


Executing company:

ARGE Tunnel Tunnel Siegkreisel, Betzdorf

Hochtief Construction AG

Kirchner Bau GmbH

Alpine Bau Deutschland GmbH


The Problem:


Pumping off of the water arising during the underground tunnel heading.


Our Solution:


Use of submersible pumps of type KTZ32.2, these being operated in permanent snore mode (dry running) during the complete construction period. This application is no problem for the pump thanks to the patented oil distributor in combination with the rotating mechanical seal, which is located completely internally.

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.