Air leakage rate (at differential pressure 300Pa): ≤700m³/m²·h
Fuse operating temperature: 280°C
Action time: 3 seconds
Reset time: 20 seconds
Valve fire resistance rating: 1.5h
Control voltage: DC24V
Resistance coefficient at fully open position: ＜0.5
Structure
Main components: Valve body, vane shaft, shaft bush, fusible link, actuator.
All valve flanges adopt TDF flange with flange width of 30mm.
Thickness of rectangular valve body: L=250mm.
Performance
The valve is normally open under normal conditions.
In case of fire, the smoke detector sends a DC24V electrical signal through the control center. The electromagnet inside the actuator is energized to operate, the valve closes automatically and outputs a closing electrical signal.
The valve can be manually closed or automatically closed by fusible action at 70°C.
It is equipped with a 6‑gear air volume adjustment switch.
The smoke and fire damper adopts manual reset; the fully automatic smoke and fire damper is reset by DC drive after actuation.