Industrial compressed air oil content is generally how much

The oil content standard of industrial compressed air varies according to the application field and industry requirements, and is usually divided into several grades, common standards range from Class 0 (≤ 0.01 mg/m & sup3;) to Class 5 (>5 mg/m & sup3;), as follows:

oil content classes 1. to international standards (ISO 8573-1)

1. Class 0
   • oil content: ≤ 0.01 mg/m & sup3;(as determined by the equipment user or manufacturer, usually equivalent to oil-free compressed air).
   • Applicable Scenarios: Industries that require extremely high oil content, such as pharmaceuticals, food processing, electronics manufacturing, breathing gas, etc.
   • Certification basis: ISO 8573-1 oil content level 0 oil-free certification, test conditions are 1 bar(a), 20 ℃, 0% humidity.
2. Class 1
   • oil content: ≤ 0.1 mg/m & sup3;.
   • Applicable Scenarios: Scenarios with strict requirements on oil content, such as instrument gas, food and beverage industry, and pharmaceutical industry.
   • Implementation mode: It needs to be purified by professional oil removal equipment (such as oil-free catalytic machine, activated carbon adsorption tank) for post-treatment.
3. Class 2
   • oil content: ≤ 1 mg/m & sup3;.
   • Applicable Scenarios: General industrial gas can meet the requirements through a coalescing filter.
4. Class 3
   • oil content: ≤ 5 mg/m & sup3;.
   • Applicable Scenarios: Industrial scenarios with low oil content requirements, such as sand blowing, general machining, etc.
5. Class 4-5
   • oil content:>5 mg/m & sup3;.
   • Applicable Scenarios: Extensive industrial scenarios with no strict requirements on oil content.

Oil content requirements 2. to domestic standards (GB/T 13277.1-2023)

• ordinary air compressor: Liquid oil content ≤ 5 mg/m & sup3;, oil vapor content ≤ 0.5 mg/m & sup3;.
• Chinese Pharmacopoeia and GMP Standards: According to the regulations of European Pharmacopoeia, the oil content of compressed air is required to be ≤ 0.1 mg/m & sup3;.
• Diving Breathing Compressed Air: China and the United States require oil content <5 mg/m & sup3;, the United Kingdom requires <1 mg/m & sup3;.

3. oil content requirements for different application scenarios

1. pharmaceutical & Food Processing:
   • Class 0 or Class 1 (≤ 0.01 mg/m & sup3; or ≤ 0.1 mg/m & sup3;) is required to ensure product safety and purity.
2. Electronic Manufacturing:
   • Class 1 (≤ 0.1 mg/m & sup3;) is usually required to avoid oil pollution of precision components.
3. Breathing gas:
   • strictly follow Class 0 (≤ 0.01 mg/m & sup3;) to protect human health.
4. General industrial gas:
   • Class 2-3 (≤ 1 mg/m & sup3; to ≤ 5 mg/m & sup3;) is acceptable, selected according to specific process requirements.

Influence and Solution of Excessive Oil Content in 4.

1. Excessive impact:
   • contaminated products (e. g. food, pharmaceuticals, electronic components).
   • Damage to equipment (e. g. corroded pipes, blocked valves).
   • Hazards to health (e. g., oil in respiratory gas).
2. Solution:
   • equipment selection: Select the appropriate level of air compressor (such as oil-free air compressor) according to the gas demand.
   • post-treatment purification installation of oil removal filter, activated carbon adsorption tank and other equipment.
   • Regular maintenance: Replace the oil core, air filter and lubricating oil, and clean the cooler.
   • intelligent monitoring: Install an oil mist sensor to monitor the oil content in real time and give an alarm.