An explosion-proof centrifugal fan is a type of fan designed for use in flammable and explosive facilities, operating without generating sparks. It is primarily used in industries with explosion-proof requirements, such as petrochemicals. Explosion-proof centrifugal ventilators are generally used in applications involving the transport of flammable and explosive gases, dust, or liquids in the workplace. In such environments, sparks generated by the fan operation can be catastrophic. Therefore, all components in the centrifugal ventilator that could potentially cause sparks must undergo explosion-proof treatment.