compressed air dryness standard

The dryness standard of compressed air mainly depends on its dew point temperature, that is, the amount of water content. The dew point temperature is the temperature at which the water vapor in the compressed air condenses into liquid water, and it is an important parameter to measure the drying degree of the compressed air. The following are compressed air dryness standards summarized according to the national standard GB/T 13277.1-2023 and industry practice:

classification of 1. compressed air dryness

according to the dew point temperature, compressed air is divided into six grades, from the driest grade 1 to the relatively humid grade 6:

2. the dryness requirements of different application scenarios

1. precision instrument: Such as industrial robots, automatic assembly lines, automobile spraying and other industries, the pressure dew point of compressed air is higher, usually between -40 ℃ and -70 ℃, which corresponds to the above-mentioned level 1 or level 2 standards.
2. Instrument Application the pressure dew point of the compressed air used in the instrument is generally required to be below -40°C to ensure the accurate operation of the instrument and extend its service life.
3. General Purpose: For some simple purging or pump applications, the dryness requirements for compressed air may not be so strict, and may only need to reach level 4 or level 5 standards.

3. methods for achieving dryness standards

1. use dryer: According to different dew point temperature requirements, different types of dryers can be selected. For example, the pressure dew point above 0 DEG C can be used refrigeration dryer; and pressure dew point in -20 DEG C to -70 DEG C, the use of adsorption dryer is more appropriate.
2. Regular maintenance: No matter which type of dryer is used, it needs to be maintained and maintained regularly to ensure its normal operation and achieve the expected drying effect.

Importance of 4. dryness criteria

the dryness standard of compressed air is of great significance to industrial production. Compressed air that does not meet the dryness may cause equipment failure, product quality degradation and even production safety accidents. Therefore, enterprises should dry the compressed air in strict accordance with the relevant standards, and carry out regular inspection and maintenance.

In summary, the dryness standard of compressed air is divided according to the dew point temperature, and different application scenarios have different requirements for dryness. Enterprises should select suitable dryers according to actual needs and maintain them regularly to ensure that the dryness of compressed air meets the standard requirements.