Main Technical Parameters
Air leakage rate (at differential pressure 300 Pa): ≤700 m³/m²·h
Microswitch contact capacity: AC 380V ＜0.5A
Control voltage: DC 24V
Resistance coefficient at fully open state: ＜0.5

Structure
Main components: valve body, decorative air outlet, valve blade, shaft, shaft bush, actuator.
Thickness of multi-blade smoke exhaust outlet: L=250 mm (including outlet panel).

Performance
It is installed in the smoke exhaust system and remains normally closed under normal conditions.
After the smoke exhaust fan is started, the fire control center sends a signal to open the valve. The ventilation axial fan supplies fresh air to the fire area to ensure fresh air supply at the fire point.
Manual reset is required after the fire is eliminated.