What is the difference between explosion-proof fan and non-explosion-proof fan

What is the difference between explosion-proof fan and non-explosion-proof fan? If you want to know, take a look at what the people involved have to say.

1, the motor is different, explosion-proof fan must use explosion-proof motor.

2, explosion-proof fan on the impeller material and impeller corresponding to the inner wall position of the shell material requirements, requirements that they will not produce sparks in case of collision, such as the use of aluminum blade and iron inner wall, or iron blade and aluminum ring in the inner wall.

3. Explosion-proof blower has lower limit requirements for clearance between impeller and housing. In order to pursue efficiency, fans often have upper limit requirements on clearance, which are contradictory to each other.

4. Explosion-proof fan has stricter safety protection requirements for the import and export end.