Compressed air quality grade standard

Compressed air quality rating standards vary by industry and application. Generally speaking, compressed air quality grade standards mainly involve solid particles, water vapor (or water content), oil and other key indicators. The following is an overview of compressed air quality rating standards based on multiple authoritative sources:

1. ISO 8573 standard

ISO 8573 is a compressed air quality standard formulated by the International Organization for Standardization (ISO). It specifies the requirements for the content of solid particles, water vapor and oil in compressed air.

1. solid particle:
   • the ISO 8573 standard classifies solid particles by diameter and is usually divided into multiple grades, such as grade 0 to grade X, with grade 0 being the most stringent. Precision manufacturing areas such as electronics and semiconductor industries often use Class 0 standards.
2. water vapor:
   • the water vapor content is expressed as dew point temperature or mass concentration (g/m & sup3;). For example, the level 1 dew point temperature is -70 ℃, which is suitable for the electronics industry; the level 2 dew point temperature is -40 ℃, which is suitable for relatively dry occasions such as the sterile pharmaceutical industry; the level 3 dew point temperature is -20 ℃, which can meet the requirements of ordinary food and drug production.
3. Oil:
   • the oil content is also divided into multiple grades, such as grade 0 to grade X, of which grade 0 is the highest requirement. Grade 1 standard oil content shall not exceed 0.01 mg/m & sup3;, Grade 2 is suitable for general occasions, and the oil content shall not exceed 0.1 mg/m & sup3;.

2. of relevant domestic standards

although there is no uniform pharmaceutical-grade compressed air quality standard in China, there are relevant general provisions in the Drug Administration Law and its implementing regulations. In addition, "GB/T 13277.1-2023 compressed air part 1: pollutant purification level" and other standards also put forward the requirements of compressed air quality.

1. Cleanliness: Compressed air can not have impurities, moisture, grease and other substances.
2. dryness: The moisture content in the compressed air should be less than or equal to the pressure dew point.
3. Other indicators: Also includes pressure, temperature, stability, etc.

3. application standards in different industries

1. industrial Grade: Usually used in various applications in factories and manufacturing, such as power tools, pneumatic machinery and production line equipment. Industrial-grade compressed air may contain certain oil, moisture and solid particles, but it is required to meet certain purity and dryness standards.

2. Commercial Grade: Mainly used in commercial buildings and office applications, such as air conditioning systems, pneumatic doors and spraying equipment. Commercial grade compressed air requires higher purity and dryness than industrial grade.

3. Food medical grade:

   • medical Grade: Used in various applications in medical institutions, such as ventilators, operating room equipment and dental equipment. Medical-grade compressed air requires greater purity and sterility to ensure patient safety and hygiene.
   • Food Grade: Used in food and beverage processing industries, such as food packaging, bottled beverages and food drying. Food-grade compressed air needs to meet specific hygiene standards to ensure product safety and quality.

4. Electronic industrial grade the quality of compressed air is very strict, such as the semiconductor industry often uses ISO 8573 level 0 standards.

5. High purity grade and ultra high purity grade for applications that require high purity, such as laboratories, precision instruments and semiconductor manufacturing. These grades of compressed air require extremely low levels of oil, moisture and solids.

Representation method of 4. quality grade

compressed air quality grade is usually represented by three Arabic numerals, corresponding to the grade of solid particles, water vapor and oil. For example, "4, 5, 6" means that the solid particle size in compressed air is grade 4, the water vapor content is grade 6, and the oil content is grade 5.

In summary, the compressed air quality level standard is a complex and detailed system, involving multiple key indicators and different application areas. When selecting and using compressed air, the appropriate quality level should be determined according to specific needs and industry standards.