Backdraft Dampers - Extruded Aluminum Frame - EM-10 Series

The EM-40 series are horizontally mounted backdraft dampers designed to allow vertical airflow down and prevent reverse airflow up. Model EM-40 has no flange, model EM-41 has a flange on the discharge side, and model EM-42 has a flange on the intake side. All dampers in this series open by air pressure differential and close by gravity. This series includes adjustable counterbalance weights to assist closing.

Aluminum construction

Pressure: Up to 10 in. wg (2.5 kPa)

Velocity: 2500 - 3500 fpm (13 - 18 m/s)

Temperature: Up to 180°F (82°C)