The air separator allows the separation of the desired product from the by-product and or impurities depending on the different specific weights. construction- casing and structure of pressed and galvanized sheet metal - air flow dampers - product selection dampers - discharge hoppers operationthe product enters by way of gravity into a rotary distributor and is uniformly spread over the entire width. The product then encounters a cross air flow, and according to its specific weight falls farther or closer to the discharge hoppers. The machine is freeblowing.