... is made up of Suction nozzle, Hydraulic suction arm, Separation unloading device, Roots blower (Vacuum pump), Electric control system ... pressure pneumatic conveying equipment (suction nozzle, hydraulic suction arm, separation unloading device, roots blower or vacuum pump), Positive press ... conveyed into the separation unloading device by the conveying pipe on the suction arm. The materials fall down ...