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Road tunnel Prague, Czech Republic

The Project:


Construction of a road tunnel for the Prague bypass, Czech Republic


Executing company:

Hochtief Construction AG


The problem:


Water removal via sump drainage during downward-moving tunnel mining.


The solution:


Multiple pumps from the KTZ series: 11 x KTZ611 and 6 x KTZ67.5. The special characteristics of Tsurumi pumps, such as an internal mechanical seal, upstream protection sleeve with gasket and a patented oil lifter allow them to be used in 24-hour on-snore- mode.

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.