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.
| Область применения | Классификация газов | Типовой газ | Минимальная энергия зажигательной искры |
|---|---|---|---|
| Под шахтой | I | Метан | 0,280 мДж |
| Заводы за пределами шахты | IIA | Пропан | 0,180 мДж |
| IIB | Этилен | 0,060 мДж | |
| IIC | Водород | 0,019 мДж |
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.
