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.
| Naudojimo sritis | Dujų klasifikacija | Tipinis dujų mišinys | Mažiausia uždegimo kibirkšties energija |
|---|---|---|---|
| Po kasykla | I | Metanas | 0,280 mJ |
| Gamyklos už kasyklos ribų | IIA | Propanas | 0,180 mJ |
| IIB | Etilenas | 0,060 mJ | |
| IIC | Vandenilis | 0,019 mJ |
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.
