CONTIENTAL FAN CFM BDD175 7" Gravity Operated Duct Backdraft Damper. Overview: BDD backdraft dampers are available in the spring-loaded and gravity style backdraft dampers. 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. Available backdraft damper models: Spring Loaded Dampers: BDD100 Backdraft damper 4″ BDD125 Backdraft damper 5″ BDD150 Backdraft damper 6″ BDD200 Backdraft damper 8″ BDD250 Backdraft damper 10″ BDD300 Backdraft damper 12″ Gravity Operated Dampers BDD175 Backdraft damper 7″ BDD355 Backdraft damper 14″ BDD400 Backdraft damper 16″ Technical Data: Technical Downloads: CFM BDD Backdraft Dampers: PDF Brochure CFM BDD Backdraft Dampers: PDF Dimensional Drawing
