Backdraft Dampers - Round - WDR-54

The WDR-53 round backdraft damper is designed to mount horizontally for airflow down or up; or vertical for horizontal airflow. This damper is opened by air pressure differential and closed by springs. Galvanized steel frame Aluminum blade Pressure: Up to 3 in. wg (0.7 kPa) Velocity: Up to 2000 fpm (10.2 m/s) Temperature: Up to 180°F (82°C)