Explosion-Proof Marking Interpretation

The explosion-proof marking "Ex d IIC T4 Gb" indicates the safety level of electrical equipment in explosive gas environments.

The following is a detailed interpretation of the meaning of each part:
Ex: Explosion-proof certification mark.
d: Explosion-proof type, indicating the use of a "flameproof enclosure" capable of withstanding internal explosions and preventing the spread of flames.
IIC: Gas group, indicating that the equipment is suitable for the most explosive IIC class gases (such as hydrogen and acetylene).
T4: Temperature group, the maximum surface temperature of the equipment is ≤135°C, eliminating ignition sources.
Gb: The equipment protection level is "high," suitable for hazardous locations with explosive gases (Zone 1 and Zone 2).

This marking is a core basis for equipment selection in high-risk industries such as chemical and petroleum. If you have any questions about the selection or certification of explosion-proof fans, please feel free to contact our safety expert team for free technical support.