WD-420 : Non-Motorized Backdraft Damper
WD-420 : Non-Motorized Backdraft Damper
The WD-420 is a non-motorized backdraft damper designed for flexible installation, mounting vertically for intake air applications while preventing reverse flow. Featuring a discharge flange for secure duct connection, it integrates easily into a range of system configurations. The damper opens in response to differential air pressure and closes with spring assistance to ensure reliable sealing when airflow stops. The WD-420 delivers dependable, low-maintenance backdraft protection for intake and vertical airflow applications.
Product Highlights
| Airflow Direction |
Horizontal
|
|---|---|
| Blade Material |
Aluminum
|
| Frame Material |
Galvanized Steel
|
| Maximum Pressure Rating (in. wg.) |
2
|
| Maximum Velocity (fpm) |
2,500
|
| Mounting Orientation |
Vertical
|
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