Oil content standard for oil-free air compressors

The oil content standards of oilless air compressors vary depending on different application scenarios. The following is a detailed explanation:

1. International standard: ISO 8573-1

This standard divides the oil content in compressed air into 0-5 level, among which:

• LV0: The strictest, oil content <0.01mg/m³(Need to be customized according to the equipment user or supplier).
• Grade 1: Oil content ≤0.01mg/m³。
• Grade 2: Oil content ≤0.1mg/m³。
• Grade 3: Oil content ≤1mg/m³。
• 4-5 level: Higher oil content and is usually used in general industrial scenarios.

This standard is widely used in Electronics, pharmaceuticals, food and other industries with strict air quality requirements.

2. Industry-specific standards

1. food industry

• Oil content requirements：
  • general requirements <0.1mg/m³, direct contact links (such as packaging sealing) need to be achieved ISO 8573 Class 0（<0.01mg/m³）。
  • International regulations such as FDA 21 CFR Part 110 and EHEDG Guidelines Oil-free air compressors or high-efficiency filtration systems are recommended.
• additional requirements：
  • Humidity needs to be controlled (such as <7ppm) to prevent oil-water emulsification and contamination of food.

2. pharmaceutical industry

• Oil content requirements：
  • China Pharmacopoeia and GMP provisions ≤0.1mg/m³, some pharmaceutical companies adopt stricter <0.01mg/m³。
  • Oil and gas need to be further purified through post-treatment equipment such as activated carbon or catalytic oxidation.
• additional requirements：
  • Humidity needs to be controlled at 40%-60%Avoid the combination of oil and water from affecting the quality of drugs.

3. electronics industry

• Oil content requirements：
  • needs to reach ISO 8573 Class 1（≤0.01mg/m³）, some high-end process requirements <0.0015ppm。
  • Pure nitrogen is often used instead of compressed air, or equipped with multi-stage filtration systems (such as activated carbon adsorption tanks).

3. Technical support for oil-free air compressors

1. lubrication method：
   Use water-lubricated, ceramic bearings or self-lubricating materials to avoid oil stains at the source.
2. multi-stage filtration：
   Equipped with activated carbon filter + oil mist separator to purify compressed air twice.
3. regular testing：
   use ISO 8573 tester Verify oil content compliance to ensure long-term stable operation.

summary

prompt: Specific standards need to be determined in conjunction with equipment manuals, industry regulations and on-site process requirements. It is recommended to consult the manufacturer or third-party testing agency regularly for verification.