To confirm whether a fan is an explosion-proof fan, the following steps can be taken:

Check the explosion-proof signs. Explosion proof signs are usually located on the casing or electrical control box of the fan, containing information such as explosion-proof level, applicable gas or dust type, explosion-proof category, etc. In China, these standards are issued by the General Administration of Quality Supervision, Inspection and Quarantine.

Understand the explosion-proof level. The explosion-proof level is usually represented by two standards: IP ¦… and EX ¦…. The IP standard involves protection levels, while the EX standard is for explosion-proof equipment. The two digits following the EX standard represent the explosion-proof level, for example, "d" in EXdIICT6 represents the explosion-proof enclosure, "II" represents the applicable gas or dust type, and "CT6" represents the temperature rise limit.

Identify explosion-proof labels and certifications. The explosion-proof identification of explosion-proof fans is generally divided into Ex and D. The Ex marking is a universal explosion-proof marking in Europe and internationally, while the D marking is a unique explosion-proof marking in Germany. In addition, explosion-proof fans also need to pass corresponding explosion-proof certifications, such as ATEX certification from the European Union and CCC certification from China.

Understand the environment and application requirements. Explosion proof fans are mainly used in flammable and explosive environments, such as chemical plants, petrochemicals, coal mines, etc. When choosing an explosion-proof fan, it is necessary to understand the environmental conditions, including the level, temperature, humidity, etc. of gases, liquids, dust, etc.

Choose the appropriate explosion-proof level and protection level. Determine the appropriate explosion-proof level (such as Exd, Exe) and protection level (such as IP54, IP65) based on environmental conditions and work requirements. At the same time, consider the materials of the fan, such as aluminum alloy, stainless steel, etc., as well as the corrosion resistance and high temperature resistance of the materials.

In summary, by inspecting explosion-proof signs, understanding explosion-proof levels, identifying explosion-proof labels and certifications, understanding environmental and application requirements, and selecting appropriate explosion-proof and protection levels, it is possible to effectively confirm whether a fan is an explosion-proof fan.