Processing Machines Powder Stainless Steel Dust Controller One unit stainless steel dust controller with dust collection tray. Dusty air enters the unit via the inlet chute. Exhaust air escape from the collector via a complete concealed filter resulting only cleaned air is to be discharged into the environment. Airflow from 15m3 to 600 m3 per hour. All construction, except the drive mechanism are fabricated in sus #304 stainless steel.