Main Technical Parameters：
Fusible link operating temperature: 70°C
Air leakage rate (at a differential pressure of 300 Pa): ≤ 700 m³/(m²·h)
Fire resistance rating of the damper: 1.5 h
Resistance coefficient at fully open position: ＜ 0.5 

Structure：
Main components: damper body, blade shaft, shaft bushing, fusible link, actuator
All flanges are formed by integrated common plate flanges with a flange width of 30 mm
Thickness of rectangular damper body: L = 250 mm