BCE Lebanon BDD170: The Backdraft Damper for Unidirectional Airflow

The BDD170 from BCE Lebanon is a robust backdraft damper engineered to provide reliable, unidirectional airflow. Designed to allow exhaust airflow while preventing any reverse flow, this damper is typically used with a fan to maintain air pressure and prevent backdrafts. Its heavy-duty construction and versatile mounting options make it an ideal solution for a wide range of commercial and industrial applications.


Key Features

  • Unidirectional Airflow Control: The BDD170 is designed to open with a positive air pressure, allowing exhaust, but to close and seal instantly when airflow ceases, effectively preventing backdrafts and reverse flow.
  • Versatile Mounting: With options for both vertical and horizontal mounting, the BDD170 can be easily integrated into various ductwork configurations.
  • Durable Construction: The damper is built with a 16-gauge galvanized steel interlocking frame and extruded aluminum blades, ensuring a rigid and long-lasting build.
  • Effective Sealing: Vinyl blade seals are mechanically locked into the blades, providing an excellent seal and consistent performance over time.

Construction & Materials

  • Frame: 16-gauge galvanized steel interlocking hat channel.
  • Blades: Extruded aluminum.
  • Seals: Vinyl blade seals.
  • Bearings: Bronze bearings.
  • Axles: Die cast aluminum.
  • Finish: Mill finish.

Sizing & Options

  • Single Section:
    • Min: 6” W x 6” H
    • Max: 44” W x 60” H
  • Multiple Sections: Unlimited width and height.

Options: Customize your damper with various materials (Aluminum or Stainless Steel), different seals (Rubber Foam or UL approved), and an adjustable counter balance weight.


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