date
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17.09.2012

Product Portrait

Expansion tanks for trucks and buses

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The DT Spare Parts brand offers a complete range with more than 30 000 different spare parts for trucks, trailers and buses, including all standard expansion tanks. In addition, the DT brand offers all matching mounting parts, including, for instance, level sensors, sealing covers and safety valves.

The DT brand products, made of high quality materials, meet your highest quality requirements and guarantee a long period of use.

The expansion tank is situated in the upper part of the cooling system and is usually made from polypropylene plastic (PP). If the cooling fluid heats up, it expands. To prevent the hoses between the radiator and the engine from becoming overloaded or even bursting, the displaced cooling fluid is accommodated in the expansion tank to minimise the loss of coolant.

The excess pressure generated is reduced by means of a valve, which is built into the cap. When the temperature of the coolant returns to normal a negative pressure is generated in the cooling system. With the help of the equalisation valve in the cover, ambient air flows into the tank. This pressure equalisation function prevents consequential damage, for example, to the coolant hoses or seals.

DT-Technic Info

DT brand expansion tanks have optimally processed adhesive joints, which ensure a particularly high pressure resistance and durability.

The material and surface coating of the press-in bushings achieve a high level of corrosion resistance. The opening pressures of the valves correspond exactly to the original specifications of the vehicle manufacturers.

The standardised electrical connections of the sensors are optimally sealed and therefore extremely resistant to coolants. 

Due to the best possible construction and accuracy of fit, DT Spare Parts expansion tanks are easy to install.

360° Picture

Construction of expansion tanks

  1. Polypropylene container (PP)
  2. Adhesive joints
  3. Press-in bushings
  4. Cover with integrated valve
  5. Level sensor 
  6. DT marking

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