Scope 
 1 for 1 and Zone 2 dangerous places. 
 2 for IIA, IIB, type explosive atmosphere. 
 Explosion-proof mark: Exd II BT4 
 Features 
 1, by the explosion-proof explosion-proof axial fan motor, blades, hair dryer and other components. Low noise, low energy consumption, explosion-proof and reliable performance. 
 2, cable wiring. 
 3, the wall: one side is a fan shape at both ends of the bell type, one side is a 90 degree angle flange type. 
 4, the pipeline: the fan at right angles at both ends of the pipe flange can be installed in the middle. 
 5, post-style: In addition to features with a wall, the additional posts tripod attachment, beat the fan mounting holes in the waist 
 6, fixed: In addition to features with a wall, the bottom of the weld fixed mounting bracket (40x40 angle iron.) 
 7, the spindle speed (or motor power or wind) can be selected by user