Air leakage rate (at a pressure difference of 300 Pa): ≤ 700 m³/(m²·h)
Micro switch contact capacity: AC 380V, 0.5A
Control voltage: DC 24V
Resistance coefficient when fully open: ＜ 0.5
Structure：
Main components: valve body, valve blade, shaft, shaft bushing and actuator
Thickness of multi-louver smoke exhaust outlet: L=250 mm (including outlet face panel)
It is installed in the smoke extraction system and remains normally closed under normal conditions. After the smoke exhaust fan is started, the fire control center sends out a control signal to open the valve. The axial flow ventilation fan supplies fresh air to the fire-affected area to ensure a continuous fresh air supply at the fire site. Manual reset of the valve is required only after the fire is put out.