It is used for cleaning and classifying semolina in flour and semolina factories. The product, whose flow rate can be adjusted, is evenly distributed over the entire screen surface by means of a curtain. Screening process is carried out with 2 or 3 layers of telero. With the aerodynamic air channel and adjustment valves, an equal vacuum is created on the whole screen surface, the products with extended adhesion surface such as bran and bran are separated from the product by vacuuming and pushed into the outlet channel.
The product (semolina) free from bran is classified according to its grain size by means of sieves.