Compact design – high efficiency

U-tube bundle heat exchanger from Viesel

The U-tube heat exchanger is a version of the tube bundle heat exchanger. The advantages lie within its compact design and is therefore very efficient. Heat stress can be compensated for due to the U-shape.

The internal tube bundle has a U-shape for U-tube heat exchangers, hence its name. As for the straight tube heat exchangers, very thin single tubes are guided straight through a large pipe.

A U-tube heat exchanger is used mostly according to the counterflow principle. For heat transport according to the counterflow principle, hot and cold medium flow in opposing directions. As a result, heat recovery of almost 100% is achieved. Counterflow heat exchangers therefore have a very high efficiency level.

Due to the bent individual tubes, a heat exchanger with U-tube bundles require significantly less space than a straight tube heat exchanger with the same design. U-tube heat exchangers also only generate a low pressure loss during operation. Corrosion and deposits can be minimised by using stainless steel. The number of maintenance intervals is thus drastically reduced. In addition a replacement of a worn tube bundle is possible.

Good compensation of heat stress

If the input temperature of the two media differ extremely, the material and construction must absorb very large heat stresses. The metal expands simultaneously at different points and to different extents as a result of the temperature difference and cracks can arise for an incorrect design.
The heat exchanger can compensate such heat stresses extremely well due to the U-shape of the tube bundle and is therefore well suited for operation with two output media at very different temperatures.

Grooves or baffles (so-called baffle plates) are incorporated in the tube bundle heat exchangers to further optimise the heat exchange.

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Everything at a glance:

Overview of U-tube bundle heat exchanger

Examples of use:

  • Heating of liquids and gases in temperature control technology
  • Water heating in swimming pool technology
  • Steam generation and condensation in the food processing industry
  • Steam generation and condensation in the cleaning industry
  • More sectors and applications


  • Low pressure loss
  • Compact design, high efficiency
  • Compensation of heat stresses
  • Large differences of the input temperature of both media possible
  • Tube bundle replaceable
  • Media: Water, gases, oils, vapour, all common liquids and gases

U-tube bundle heat exchanger

Wide range of application options

SU-tube heat exchangers with counterflow technology are widely used in temperature control and swimming pool technology as well as the food processing and cleaning industry.

They are used in water heating, for vapour condensation and the heating of liquids and gases.

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The perfect U-tube bundle heat exchanger for your application

Customer-specific calculation, design and production

We calculate each heat exchanger individually for an optimum solution. Here all conditions on site (e.g. connections) and wishes of the customer are incorporated for the design. In this way, an exact profitability calculation is possible.

As a result of decades of experience in the construction of heat exchangers, we have the necessary expertise to optimally calculate and manufacture U-tube heat exchangers for every application purpose.

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Do you have any questions?

The stainless steel heat exchangers from Viesel offer you a resource-saving energy source in a wide range of application areas. Whether brewery, automotive industry or swimming pool technology. At Viesel, we develop company-specific heat exchangers made of
stainless steel for you.

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