The Imperial Systems, Inc. BackDraft damper prevents a backdraft of air coming from the baghouse and traveling into the factory. It features multi-inlet options for a zone system, gravity operated and balanced to minimize pressure loss. It is a heavy-duty, fully welded 7 and 10-gauge carbon steel construction. All units are factory tested prior to shipment and painted OSHA safety yellow. The dampers are available in standard 4” to 48” diameters. Larger sizes are available per request.