Draft-Air India Pvt. Ltd. Manufactures Cyclone Compactors with Continuous Discharge of Micro Dust. Draft-Air India Pvt. Ltd. Is an ISO 9001:2000 certified company. The Cyclone Compactors with Continuous Discharge of Micro Dust collects micro dust from the secondary filter. The value proposition of providing bag filters ensures the arrest of any trace micro dust prior to rotary filter. Dust is being separated in the cyclone and is continuously discharged through small pipe compactor installed below the cyclone separator.