OptiDry Turn air dryers are designed for drying the coated web and contactless turning at the same time. Aided by patented air dryer nozzles, the dryers achieve uniform evaporation with minimum energy consumption, high efficiency and excellent runnability. We can prove you get the best paper quality and lowest energy consumption with Valmet air dryers. OptiDry Turn dryers enable a shorter and compact layout with stable runnability and evaporation due to lack of free draws.
Coating drying is very energy demanding process and with air dryers it is possible to cut to half the energy costs of it. The energy efficiency of Valmet air dryers ranges from 70 to 90 % and respectively the energy efficiency of infrared dryers only from 30 to 40 %. So energy savings with air drying are 50 % or more compared to infrared drying. The OptiDry Turn air dryers are high efficiency coating dryers for all coated paper and board grades. They can be used for both, new machines and rebuilds.
There are basically two kind of OptiDry Turn air dryers with several applications:
OptiDry Turn air dryers have shown their excellence in numerous references.
In the figure above: energy consumption and specific evaporation of OptiDry Coat compared to infrared dryers