Explosion proof fan adopts explosion-proof shell and explosion-proof motor, strictly avoiding spark generation, suitable for flammable and explosive places such as chemical industry and gas stations; Ordinary fans only meet basic ventilation needs and are easy to maintain but lack explosion-proof capabilities.

1、 Core design differences

Explosion proof structure: The explosion-proof fan adopts an explosion-proof shell (such as explosion-proof type, increased safety type), and the gap between the impeller and the shell is strictly controlled (usually ≤ 0.2mm) to avoid sparks caused by friction; Ordinary fans do not have special explosion-proof designs, and the casing and components are made of conventional metal materials.

Motor protection: The explosion-proof fan motor is of explosion-proof type, with winding insulation level ≥ F level, and the junction box adopts explosion-proof sealing structure; Ordinary fan motors only meet basic insulation requirements and do not have explosion-proof seals.

Material selection: Explosion proof fan impellers and casings are commonly made of cast aluminum or stainless steel (to prevent collision sparks), while ordinary fans are mostly made of cold-rolled steel plates.

2、 Applicable scenarios vary

Explosion proof fan: Used in places with flammable and explosive gases (such as chemical workshops, gas stations) and dust (such as grain warehouses, flour mills), it can avoid igniting the medium with electric sparks generated during operation.

Ordinary fan: suitable for ventilation scenarios such as offices and shopping malls without flammable and explosive risks, only meeting the needs of air circulation.

3、 Safety Standards and Certification

Explosion proof fans must comply with the GB 3836 series explosion-proof standards and obtain an explosion-proof certificate (such as Ex d Ⅱ BT4);

Ordinary fans only need to meet the basic performance standards of ventilation equipment, without explosion-proof certification requirements.

4、 Differences in operation and maintenance

When repairing explosion-proof fans, it is necessary to turn off the power and open the cover. The replacement of components must use explosion-proof accessories of the same specifications;

Ordinary fans are easy to maintain, can be directly disassembled and repaired, and have strong universality of accessories.