The difference between explosion-proof fans and non explosion-proof fans:1. Different motors are used, and explosion-proof fans must be usedExplosion-proof motor2. There are requirements for the material of the impeller and the corresponding position of the inner wall of the casing. It is required that they will not produce sparks in case of collision, such as using aluminum fan blades and iron inner walls, or adding aluminum rings to the inner wall of iron fan blades. 3. Explosion proof fans have lower requirements for the clearance between the impeller and the casing. However, fans often have upper limit requirements for clearance in order to pursue efficiency, which is contradictory to each other. 4. Explosion proof fan for inlet and outlet endssafety protectionMore stringent requirements.