For reducing the drying time and achieving a very good finish, the pieces pass through a tunnel with forced and temperature-controlled air flow.
The distribution system is provided with adjustable air nozzles, appropriately placed, and it generates an air stream that covers the pieces uniformly over the whole surface.
The thermal regulation system is particularly accurate, in order to control the drying process. Air can be heated by means of hot water, steam or by gas or oil generators.
It is possible to fit a by-pass between air inlet and outlet. When the by-pass is open, 80% of the drying air recirculates. This enables about 50% heat energy saving during the cold season.