Content Container Nailor’s industrial backdraft dampers are designed to prevent the backflow of air while allowing for automatic air intake or exhaust in industrial HVAC or process air systems. Models 1900CB - Counterbalanced Backdraft • Steel • Vee Blade 1905CB - Counterbalanced Backdraft • Steel • Airfoil Blade Submittals All Submittals Combined Individual Submittals 1900CB • Steel • Vee-Blades • Counterbalanced 1905CB • Steel • Airfoil Blades • Counterbalanced Options and Accessories BH1 & BH2 • Bolt Hole Configurations for 1900 Series Industrial Dampers Control Sequence Performance Data Finish IOM Miami-Dade NOA Specifications Catalog Literature Videos