List dampers duct size (WxH) width x height.
All dampers will be 1/4″ smaller both ways Frame: 16ga galvanized formed hat channel welded construction
Frame Dimensions: 3- 7/8″ Hat channel (11/16 x 5/8 x 2-1/2 x 5/8 x 11/16)
Blades: 16ga galvanized rib formed (3V), 8″ maximum blade width
Bushings: Bronze 1/2″ round oilite
Control rod: 1/2″ round CRS plated 9″ long
Axles: 1/2″ round x 2-1/2″ long CRS plated
Hardware: Plated steel – brass pivits – 1/4″ round linkage rods
Mfg. options: Stainless Steel – all stainless steel. Aluminum – aluminum with st. stl set screws, bronze bushings/pivits.
Options: Quadrants 1/2″ round – either galvanized or stainless steel (both with cast handle). Above quadrants with 2″ standoff in galvanized, stainless steel or aluminum. Plate on control rod side to install in existing duct. Nylon bushings installed upon request.