Explosion-proof grade of air compressor

The explosion-proof level of the air compressor refers to its safety performance level in hazardous environments such as explosive gas, steam, liquid or dust. Explosion-proof grade is indicated by explosion-proof signs, which usually contains the following information:

1. Explosion-proof sign EX: indicates that the equipment is an explosion-proof electrical equipment.
2. Explosion-proof type: Indicates the explosion-proof measures adopted by the equipment, such as explosion-proof type (d), safety-increasing type (e), intrinsic safety type (ia or ib), etc.
3. Equipment Category: Class I and Class II. Class I equipment is used for underground coal mines, and Class II equipment is used for other explosive gas environments other than underground coal mines. Class II equipment is further subdivided into three levels: IIA, IIB and IIC, among which the IIC level has the strongest explosion-proof capability.
4. Temperature Group: It represents the maximum allowable surface temperature value of the equipment under specified conditions. It is divided into six groups: T1 to T6, with the highest T1 group and the lowest T6 group.

Give examples:

• Explosion-proof mark ExdIIBT4: indicates that the device is explosion-proof (d), suitable for Class II Class B explosive gas environment, with the maximum surface temperature not exceeding the temperature limit of the T4 group (i.e. the maximum surface temperature not exceeding 135℃).

Precautions for choosing an explosion-proof air compressor:

• Confirm the explosion-proof level: Select an explosion-proof level that meets the requirements according to the type and concentration of explosive gas or dust in the use place. For example, in high-risk industries such as petroleum and chemical industry, it is usually necessary to use IIC-level explosion-proof air compressors.
• Understanding explosion-proof types: Different explosion-proof types are suitable for different hazardous areas and levels of danger. For example, the intrinsic safe type (ia or ib) is suitable for zones 0, zone 1 and zone 2, while the explosion-proof type (d) is generally suitable for zones 1 and zone 2.
• Consider other performances of the equipment: In addition to explosion-proof grade, the air compressor’s performance indicators such as air exhaust volume, pressure, power, and energy efficiency need to be considered to meet actual production needs.

Application locations for explosion-proof air compressors:

Explosion-proof air compressors are widely used in petroleum, chemical industry, coal mines, medicine, textiles, food and other industries, as well as gas stations, gas stations and other environments with explosive dangers. In these places, the use of explosion-proof air compressors can ensure production safety and avoid explosion accidents.

Summary:

The explosion-proof level of the air compressor is an important indicator to ensure its safe operation in dangerous environments. When choosing an explosion-proof air compressor, it is necessary to select explosion-proof grades and explosion-proof types that meet the requirements based on the explosive hazard degree and the types of hazardous substances in the actual use place. At the same time, other performance indicators of the equipment need to be considered to meet actual production needs.