Dampers
Non Return / Backdraft Damper
Gravity-operated non-return damper that prevents reverse airflow in exhaust and ventilation ducts. Lightweight blades open with airflow and close when the fan stops.
| Construction | GI or aluminium casing |
| Blade type | Gravity balanced aluminium blades |
| Control | Self-acting by airflow |
| Mounting | Horizontal or vertical duct installation |
| Finish | Mill finish / galvanized / powder coated |
| Size basis | Duct / neck W x H in mm |
Performance Data
Technical Specifications
| Model | Size (mm) | Material Type | Paint Type |
|---|---|---|---|
| AW-NRD-200x200 | 200 x 200 | Frame depth 120 | 250-800 |
| AW-NRD-300x300 | 300 x 300 | Frame depth 120 | 600-1800 |
| AW-NRD-450x300 | 450 x 300 | Frame depth 120 | 1000-3200 |
| AW-NRD-600x400 | 600 x 400 | Frame depth 120 | 2200-6500 |
| AW-NRD-900x600 | 900 x 600 | Frame depth 150 | 5000-15000 |
* Values are nominal and subject to manufacturing tolerances. Consult Air-Way technical support for project-specific sizing, finishes or performance data.
Where It’s Used
Key Applications
Backdraft dampers protect systems from reverse air movement and unwanted drafts. They are commonly installed downstream of exhaust fans or on fresh-air openings.
Exhaust fans
Fresh air branches
Generator rooms
Toilet exhaust
Kitchen ventilation
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