Purpose: Used for cleaning of cereals and cereal crops from impurities different aerodynamic properties. Working principle: The product to be treated is fed to the receiving chamber, then to vibrokatok, which not only aligns the grain layer along the entire length of the tray, but also contributes to the stratification of the cereal mixture so that light impurities are moved to the top layer. Then the product gets into pneumocephalus channel, where it is blown upward flow of air aspiration network. Aerodynamically light particles are captured by air and arrive in sedimentary camera