Duct smoke and fire damper is a fire protection component, usually installed on the pipes of a mechanical smoke extraction system, remaining in an open position under normal conditions, and opens to exhaust smoke in the event of a fire.

Tobacco smoke, shuts off when the flue gas temperature inside the exhaust pipe reaches 280 degrees, and maintains smoke leakage and fire resistance integrity requirements within a specified time, serving as a smoke barrier.

Fire-retardant function. Main materials: carbon steel, galvanized plate, stainless steel. In the event of a fire, ensure reliable closure; use an alcohol lamp or other fire source to activate the fire prevention

Fire valve temperature sensor fuse; after the temperature sensor activates, the fire damper should automatically close reliably, including the automatic closure of the smoke exhaust fire damper.

Closed; the gap between the blades or between the blades and shims should not exceed 2mm. Measure the gap between the blades or between the blades and shims with a feeler gauge.

After 10 opening tests for reliability, both electric and manual operation smoke exhaust valves open immediately.