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 inches wg pressure to open
• Simple installation in any position – entire assembly inserts into duct
• Exterior foam gasket assures a tight seal against duct
• 4″, 5″, 6″ & 8″ models include stamped metal sleeve with center pin design
• 10″ & 12″ models include rolled metal sleeve with center post design

Gravity Operated Backdraft Dampers

• Low air leakage design
• Galvanized steel housing, aluminum butterfly damper blades
• Gravity operated closure
• Install in horizontal or vertical (upblast only) position
• Ideal for supply or exhaust applications
• Available in three sizes: 7″, 14″ & 16″