In the smoke prevention system pressure pneumatic valve and pressure pneumatic valve is the same thing

in general is the same thing. Pressure pneumatic valve can be widely used in the purification workshop or clean room, used to maintain indoor and outdoor is differential pressure, make indoor air discharge excess, stop the outdoor air intrusion. In order to prevent pollution of clean room, indoor must maintain positive pressure, if clean indoor pressure is too high, cause the door leaf is not easy to switch, thus using pressure relief damper to clean indoor micro positive pressure. Through the pressure inlet air flow is in commonly - , maintain pressure difference between m/h - Between the Pa.