It is used to separate foreign materials that are lighter than cereals with the help of air. It can be placed at the outlets of the garbage purifier and the peeler machines. While the goods pouring from the goods inlet flows smoothly and in the width of the channel, it is easily separated from the foreign materials with the help of the adjustable back curtain. With the upper curtain setting, it is ensured that the air is separated from foreign materials with high suction power. In addition, lighting and transparent curtain glass provide convenience for adjustment and surveillance..