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Separate fire and smoke components consume too much duct length.
The linked-blade configuration combines the two closure functions in one location.
STJH-COMBINATION-FIRE-SMOKE-DAMPER-305X305-CLASS1
Combination Fire and Smoke Damper 305 x 305 mm Class I
Combined thermal and smoke closure in a compact square duct opening.
- A single assembly addresses both smoke leakage control and thermal closure.
- External actuation keeps the drive accessible outside the air passage.
Product Introduction
The small multi-blade assembly combines sealed blade edges with an external drive mechanism. Unlike a stored curtain, the pivoting blades remain within the frame and close together across the passage.
Key Features
- A single assembly addresses both smoke leakage control and thermal closure.
- External actuation keeps the drive accessible outside the air passage.
Technical Parameters
| Nominal Opening | 305 x 305 mm |
|---|---|
| Blade Arrangement | Linked multi-blade |
| Frame Material | Galvanized steel |
| Blade Profile | Formed 3V steel |
| Leakage Configuration | Class I |
| Fire Resistance Configuration | 1.5 hours |
| Maximum Velocity | 2000 fpm |
| Maximum Pressure | 4 in. w.g. |
| Elevated Temperature Configuration | 350 °F (177 °C) |
| Customization | Available for the intended partition, duct size and control arrangement. |
Applications
- Small combined fire-and-smoke barriers
- Laboratory branch penetrations
Solutions for Your Application
The actuator may be inaccessible after installation.
An external drive arrangement permits its service side to face a planned access opening.
Available Options
- Actuator supply selection
- Blade position indication
- Sleeve length
Planning a Combination Fire and Smoke Damper 305 x 305 mm Class I specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
