How to classify the protection level of explosion-proof electric hoists? More and more coal mining enterprises or petroleum exploration projects are choosing explosion-proof electric hoists in engineering projects. Before use, you should first have an understanding of the explosion-proof level in order to select the product that suits you during the procurement process, while also ensuring operation during use.
The explosion-proof electric hoist is made of DIIBT4, DIICT4, and DIPA20TAT4 explosion-proof steel wire rope electric hoist according to the national standards GB10222-2001 explosion-proof steel wire rope electric hoist, GB12476, 1-2000 explosion-proof electrical equipment for explosive dust environments, and GB3836, 1-2000 explosion-proof electrical equipment for explosive atmospheres - explosion-proof electrical equipment "d", Suitable for hazardous locations with explosive gas mixtures in factories and hazardous locations with explosive dust mixtures in factories. Its main body can be suspended on the I-beam track for straight or curved operation.
Explosion proof electric hoists are mainly divided into three protection levels: IIA, IIB, and IIC. The temperature group is T1-T4 for flammable gases or explosive gas mixtures composed of steam and air.
The explosion-proof electric hoist can be divided into Class B and Class C. Explosion proof electric hoists are generally suitable for Zone 1 and Zone 2. The applicable temperature range for explosion-proof electric hoists is mainly from T1-T6, and reaching the T6 level is a high temperature limit. For example, DIICT4 represents: d represents flameproof type. II represents Class II explosion-proof, i.e. factory explosion-proof. C represents that it can be used in Class C explosion-proof areas, which means it can be used in hazardous areas. T4 represents the temperature group. Currently, there are many DIICT4 grade explosion-proof electric hoists used.
Please refer to the following commonly used explosion-proof classification and common hazardous gas classification.
Dangerous gas types EX IIBT4 include ethane, propane, butane, heptane, ethylene, carbon monoxide, gasoline, acetone, styrene, toluene, benzene, methanol, ethanol, vinyl chloride, acetaldehyde, etc. EX IICT4 hydrogen, water gas, and gases other than EX IIBT4.
