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DustExplosion-ProofElectricHoistExplosion-ProofLevel|TechnicalSpecifications

Technical Specifications

Dust Explosion-Proof Electric Hoist Explosion-Proof Level

Dust explosion-proof electric hoists are classified into three explosion-proof grades: IIA, IIB, and IIC. They are suitable for environments where combustible gases or vapors mix with air, categorized into temperature groups T1 to T4.

Condition CategoryGas ClassificationRepresentative gasesMinimum Ignition Spark Energy
Under The MineIMethane0.280mJ
Factories Outside The MineIIAPropane0.180mJ
IIBEthylene0.060mJ
IICHydrogen0.019mJ

These electric hoists are further divided into Class B and Class C types, typically utilized in Zones 1 and 2. The applicable temperature range for these hoists spans from T1 to T6, with T6 being the safest in terms of explosion-proof safety.

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