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News: 11/26/2018

261118_LTIT_Leister grows with Krelus

MFM for the calibration of respiratory modules

The Swiss multinational Leister, a leading manufacturer of plastic welding solutions and hot air systems for the process industry, is expanding its range of products by acquiring Krelus, a manufacturer of the most advanced infrared heating systems.

LEISTER AND THE PROCESS HEAT INDUSTRY

In the process industry, there are many cases where it is necessary to heat certain elements at specific points. Leister, a leading Swiss multinational in this sector, has always been committed to ensuring that heat is delivered where and when it is needed, without waste. Clean, efficient and precise, Leister heaters and blowers have earned an excellent reputation for their functionality and versatility. They are used successfully in many industries, from packaging to the plastics industry, from the food industry to woodworking, and in special segments such as the repair of car bodywork elements and other plastic products.

Convection heating requires an intermediate fluid between the heat source and the object to be heated: in the case of Leister heaters and blowers, this is air, a clean medium, which does not require complex disposal, does not deposit dust (which tends to remove) and generally does not alter the characteristics of the treated product. Hot air heating is an efficient and cost-effective solution for most applications in the process industry. There are also situations in which convective motions can interfere with the proper course of the process: for example, if the material to be heated looks just like dust, plates or sheets or other materials whose surface could be altered by the motion of the hot air, or in the case of composites, where the temperature to be reached is different depending on the material under consideration.

In these cases heating by radiation can be useful: the heat coming from the source is transmitted directly to the object to be heated without any intermediation. Radiation can be reflected, pass through the object or be absorbed, depending on the wavelength; by calibrating the wavelength, it is possible to obtain optimal absorption of the thermal energy by the object being processed, by heating it efficiently and rapidly. It is also possible to heat the individual components of a composite element with different intensities, thanks to the different absorption characteristics of the radiation by the different materials.

Krelus

THE ACQUISITION OF KRELUS

The range of solutions offered by Leister is now extended to include infrared heating thanks to the acquisition of Krelus, a Swiss specialist in this particular technology. For more than 40 years, Krelus has been offering high-performance infrared heaters based on innovative technology. The radiant energy passes directly from the heating element, consisting of a thin sheet of metal material, to the product, without the use of glass, quartz or ceramics as a means of heat transmission. Efficiency is guaranteed by special insulation systems that drastically reduce heat loss from the back to the heating systems.

The radiations emitted by Krelus heaters is in the medium wave range (± 3.0 µm), which is very well absorbed by elements such as paper, fabrics and thermoplastics. This allows considerable heating efficiency and precision. In addition, Krelus systems have a very short warm-up time, which allows them to be frequently switched off and on again, by following the needs of the process, thus allowing intelligent use of energy. The other important benefit of the system's very low thermal inertia is safety: in the event of process interruptions, the heating elements are immediately switched off and, as a result, the risks of overheating are eliminated.

FIELDS OF APPLICATION

Krelus IR heaters can be used in many different applications:

- In installations for the coating of textiles, films, paper and films;

- In pre-drying or heating systems for materials;

- In plants for general processing of plastic materials, such as printing, laminating;

- In offset printers;

- In short, in all cases where high intensity exposure is required, simple adjustment options, reduced on/off times and tailor-made solutions in combination with economic optimisation.

 

prodotti Krelus

The needs of the industry are not all the same: for this reason Krelus solutions are available in a wide range of sizes and can be built to measure, with individual elements up to 8 meters in length. The modularity of these solutions allows you to precisely control the area to be heated or to obtain the best possible results.

For further info and enquires about Leister solutions do not hesitate to contact us per e-mail

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