On-Line Catalog : Backdraft Dampers > Light Duty > Formed Blade > BD-53
Model BD-53 adjustable counterbalanced assist to open backdraft damper
formed style blade
BD-53 backdraft dampers employ counterbalanced gravity operated formed style blades to restrict reverse airflow and to permit the forward flow of air in the intended direction. Adjustable counterbalances attached to the blades permit field adjustment to regulate start-to-open and full open blade operation at very low pressure. The BD-53 is intended to be vertically mounted in either exhaust or intake installations for low velocity and pressure applications.