The spring loaded dampers are available in 4″, 5″, 6″, & 8″ models with a center pin design and a 10″ & 12″ center post design. The gravity damper is available in 7″,14″ & 16″ and offers a galvanized steel housing and aluminum butterfly damper blades.
Spring Loaded Backdraft Dampers:
- Neoprene damper seal minimizes leakage
- 20 gauge steel housing, aluminum spring loaded butterfly damper blades
- Gasket designed to withstand temperatures from -22°F to 180°F
- Requires from 0.04 to 0.08 in. wg pressure to open
- Simple installation in any position – entire assembly inserts into duct
- Exterior foam gasket assures a tight seal against duct
- 6″ size include stamped metal sleeve with center pin design