What should the oil content of compressed air in contact with food be less

According to international standards and industry norms, the oil content of compressed air in contact with food shall be strictly controlled by grading. The specific standards are as follows:

1. direct contact with food scenes (e. g. ingredients, fermentation, stirring)

• international Standards:
  • ISO 8573-1:2010 Class 1: Oil content ≤ 0.01mg/m³(sum of liquid oil, oil aerosol, oil vapor).
  • 3-A Health Standard: Dairy products and beverage industry equipment requires Class 0 oil-free compressed air, which needs to be realized by oil-free compressor or deep purification.
• Regulatory requirements:
  • FDA 21 CFR Part 110: It is mandatory to use oil-free compressed air or high-efficiency filtration system to avoid oil pollution.
  • EHEDG Guide: It is recommended to configure the activated carbon oil mist filter combination to ensure that the oil residue meets the standard.
• Technical support:
  • adopt water-lubricated oil-free compressor to eliminate oil pollution from the source.
  • Equipped with a catalytic oxidation purifier, decomposes oil vapor into CO₂ and H₂ O, ensuring absolute oil-free.

2. indirect food contact scenarios (e. g. packaging workshop, bottle blowing)

• international Standards:
  • ISO 8573-1:2010 Class 2: Oil content ≤ 0.1mg/m³.
  • Some companies adopt stricter internal standards (such as ≤ 0.05 mg/m & sup3;) to improve food safety.
• Risk control:
  • regularly detect oil, moisture and particulate matter, and verify at least once every quarter.
  • Use high-efficiency precision filters (filtration accuracy ≥ 0.01 μm) to ensure stable compressed air quality.

3. special application scenarios (e. g. food film blowing, aseptic packaging)

• custom Standard:
  • the total oil content should be controlled 0.01 mg/m & sup3; below it is necessary to combine multi-stage filtration (condensed activated carbon adsorption) and real-time monitoring system.
  • Simultaneous control of microbial indicators (such as the total number of colonies ≤ 10CFU/m & sup3;).

4. Detection and Compliance

• detection frequency:
  • direct contact link: weekly detection of oil, moisture, particulate matter; monthly microbial detection.
  • Indirect contact link: monthly detection of key indicators, quarterly comprehensive physical examination.
• Consequences of violations:
  • excessive oil content may lead to food odor, chemical pollution, enterprises face the risk of recall or legal penalties.
  • Enterprises that have not passed the ISO 8573 certification may lose their international market access.

5. Technology Solutions

by strictly enforcing these standards, food companies can ensure the safety and compliance of their compressed air systems and the quality of their end products. It is recommended that a third-party agency be commissioned quarterly for full-project testing and annual ISO system review.