By the explosion-proof axial fan motor, fan, hair dryer and other components, welded steel duct with blades made of aluminum alloy die casting, surface electrostatic spray; divided into three types; 1 Wall : fan shape at both ends of the side is a bell-type, while a 90 ° angle flange type; 2 pipeline: Fans at right angles to both ends of the side flange can be installed in the middle of the pipe; 3 position type: In addition to having a wall style characteristics, the additional posts tripod attachment; 4 Fixed: In addition to features with the wall, the bottom of the mounting bracket welded type impeller diameter fixed amount of wind power speed BFS-300 300 1560 0.18 1450 BFS-400 400 2880 0.37 1450 BFS-500 500 5700 0.55 1450 BFS-600 600 9420 0.75 1450 BFS-700 700 11460 1.1 1450