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About the oil content of compressed air

2026-04-15Views:

The oil content of compressed air depends on industry demand and equipment configuration, usually through ISO 8573-1 grading, the following is the key information:

1. oil content grade standard

Grade oil content (mg/m & sup3;) applicable Scenarios
level 1≤ 0.01 medical, Pharmaceutical, Semiconductor
level 2≤ 0.1 food, precision instruments
level 3≤ 1.0 spraying, chemical
level 4≤ 5.0 general industry
level 5-9>> 5.0 scenarios with low air quality requirements

2. industry differences

  • medical/Pharmaceutical: Level 1 or oil-free air compressor is required to ensure the compressed air is sterile.
  • Food Processing2-3 levels are usually required to avoid oil pollution.
  • General manufacturing: 4-5 levels can meet the needs of pneumatic tools.

3. detection method

  1. online monitoring:
    • use oil sensor real-time detection, accuracy up to 0.01 mg/m & sup3;.
  2. Laboratory Analysis:
    • pass after sampling infrared spectroscopy or gravimetric method the test results are more accurate.

4. Measures to Control Oil Content

  • equipment selection: Oil-free air compressor is preferred for high-demand scenarios.
  • Maintenance Critical:
    • oil air compressor needs to be replaced regularly oil-water separator filter element(usually every 2000 hours).
    • Keep the air compressor environment clean and prevent dust from accelerating the blockage of the filter element.

Summary: The oil content of compressed air ranges from <0.01 mg/m & sup3;(medical grade) to> 5 mg/m & sup3;(general industrial). Users need to select equipment according to industry standards and maintain it regularly to control oil content and avoid production pollution or equipment failure.

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