The machine is used to clean and classify semolina, in wheat or corn mills.The product is distributed evenly on the surface of the sievesWith special adjustment valves arranged along the entire length of the sieves, an excellent suction effect is obtained on the surface of the sieve.The cleaning of the semolina also takes place thanks to this suction that lifts the lightest impurities.The clean product (semolina) is classified according to the granulometry by crossing the veils of the sieves.Bran and light impurities are retained and come out in the final exit.