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Henndorf Tunnel, Austria

The project:


Construction of a road tunnel for by-passing Henndorf.


Executing companies:

Wayss&Freytag Ing. Bau AG

Held&Francke Baugesellschaft mbH&Co.KG

Habau Hoch- u. Tiefbaugesellschaft mbH

Sonnek Engineering GmbH (Tsurumi partner)


The problem:


Drainage via open dewatering during tunnelling operations.


The solution:


Implementation of multiple KTZ and KTV series submersible pumps which can be operated in 24-hour snore mode due to their construction type.

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.