SFJ600-VI preduster is specially designed for coating food processing, it coats the bottom of the products by the layer of the flour on the conveyor belt, it coats the surface of the products by the unique belt pouring the flour evenly to the passing products on the belt. This can ensure the coating evenly, equally, and the coating quantity is controlled. Using the airflow system which is easy to connect to the preduster, it can collect the flour generated from the falling of the flour inside and recycle it, separate the air and the flour, suck the clean air onto the products to blow off the extra flour.