The air separator with a closed air cycle is designed for the separation of solids by using air flow based on differences in the aerodynamic properties of the particles of the partial components of the mixture. Air separators can be used as separate pieces of equipment, for example, to separate the husks and husking bran in the mills, cereal plants, oil extraction and oil press plants, and in combination with separators grain cleaning at grain elevators serebryannyj and other grain processing enterprises.