List damper as duct size – damper will be 1/4″ smaller
Frame: Sizes 6″ to 8″ 16ga galvanized x 2″- welded. Sizes 10″ to 20″ 10ga galvanized x 2″- welded.
Blades: 16ga galvanized formed steel
Bushings: 1/2″ round bronze oilite
Control rod/axle: 1/2″ round plated steel
Hardware: Plated and riveted
Sealed Damper Construction:
Seals – attached to frame: 1/8″ x 1/2″ neoprene gasket
Aluminum: Aluminum with stainless steel set screws/bronze bushings
Stainless steel: All stainless steel
• Galvanized or stainless steel (both with cast handles)
• Above quadrants with 2″ standoff in galvanized, aluminum or stainless steel.