1. The positive pressure air supply outlet is also known as a multi-blade air supply outlet or a pressurized air supply outlet. It is generally installed in smoke-proof antechambers and at the outlet of stairwell air supply systems, with an aluminum alloy panel attached externally, and is normally wall-mounted. The valve is normally closed and can be opened manually or electrically, with manual reset. It outputs an opening signal (if two groups of output signals are required, please specify when placing an order).  
2. Microswitch Capacity: AC380V/3A.