American Aldes Cape Backdraft Dampers are designed to overcome the inefficiencies and limitations of traditional gravity or butterfly dampers. It incorporates a special fabric sleeve attached to the interior of a metal sleeve. The fabric sleeve will allow air to pass through in the desired direction of flow with minimal reduction in airflow. The fabric collapses in the presence of back pressure, preventing unwanted reverse airflow. Cape Backdraft Dampers are ideal in dryer ducts.
Minimal pressure loss in airflow direction. (Standard spring or gravity dampers offer more resistance to airflow and require higher opening pressures. At maximum opening, standard dampers have a smaller free area and create more turbulence, resulting in more static pressure loss and noise.)
May be used in any orientation except downward airflow.
Resists clogging by airborne lint, making it an ideal damper for use with clothes dryer exhaust.