For a variety of tasks we use our efficient hot air dryers. The air is brought to the desired temperature via radiators and blown onto the goods to be dried. We use two variants for this:
Recirculating air dryer
Sucked air is blown over the heating elements and through the air outlet grids, into the container and onto the products to be dried. Part of the air enriched with water is dried by the heating elements and returned to the products. Another part of the air is discharged to the environment and compensated by sucked dry air.
Exhaust air dryer
A fan blows the intake air through a filter and over a heater onto the products in the dryer. The heat causes the water on the products to evaporate. The vapour is dissipated in the air flow to the environment.
Our repertoire of drying systems includes vacuum dryers. These are used especially for products with complex geometry. By lowering the pressure, the boiling point of the water decreases and thus evaporates more quickly. In addition, cavities that are difficult to reach can also be dried efficiently.
The parts to be dried are subject to particularly high requirements in some industries. Water spots or minute particles must be avoided during the drying process. The use of infrared dryers, together with a laminar flow box to remove evaporation, is an efficient drying method.
At RATIONAL we use infrared dryers combined with our vacuum dryers. This is necessary if the parts to be dried have a low heat capacity and therefore have to be kept at temperature with increased effort.
