There are indeed two types of explosion-proof fans: gas explosion-proof and dust explosion-proof. There are essential differences between the two in terms of explosion-proof principles and applicable scenarios:

Differences in explosion-proof types

Gas explosion-proof blowers are mainly designed for combustible gas or steam environments, and use explosion-proof and safety enhancement technologies to prevent the danger caused by explosive gases. Dust explosion-proof fans are suitable for combustible dust environments, and can block dust explosion conditions through shell protection, surface temperature control, and other methods. ‌

Core design differences

Gas Explosion proof: Typically designed with explosion-proof or increased safety features, the enclosure has a lower level of protection and may allow gas infiltration. ‌

Dust Explosion proof: The enclosure has a higher protection level (such as IP66) and is equipped with positive pressure, spark free and other technologies to prevent dust from entering or accumulating. ‌