ES-40 Series

The ES-40 series are horizontally mounted backdraft dampers designed to allow vertical airflow down and prevent reverse airflow up. Model ES-40 has no flange, model ES-41 has a flange on the discharge side, and model ES-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 2½ in. wg
  • Velocity: Up to 2000 fpm
  • Temperature: 180°F