City railway tunnel, Dortmund
		The project: Construction of the city railway station Ostentor Executing company: Wayss & Freytag Ingenieurbau AG Oevermann GmbH   The problem: Pumping off the water arising during mined underground heading.
Our solution: 10 Tsurumi submersible waste water pumps of series KTZ were used for drainage. In the illustration above one KTZ45.5 and one KTZ67.5 are shown on snore operation installed in the starting shaft. The tunnel is driven on two levels over a length of 1300m and a cross section from 36sqm up to 185sqm. Track 3 at level 21m under ground passes below the track 2 running at level 14m underground and surfaces between the tunnels for tracks 1 and 2.
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, 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 conditions of sales (www.tsurumi-europe.com/english/GCS.htm) that we also send to you by mail on request.