The oil content of the compressed air of the oil-injected screw air compressor is usually controlled within 3ppm(3 mg/m & sup3;), but the specific standards vary depending on the application scenario, the following is a detailed description:
1. General Industrial Standards
- standard provisions for example, the emission standard of pollutants for air compressor (GB/T 3785-2006) stipulates that the oil content is ≤ 5 mg/m & sup3;. This standard is applicable to most general industrial scenarios and ensures that the quality of the compressed air meets the basic requirements.
2. Precision Manufacturing and Medical Field
- high precision requirements: Some precision manufacturing and medical scenarios have higher requirements for the oil content of compressed air, usually requiring oil content <0.01 mg/m & sup3;(ISO 8573-1 CLASS 0 level). This standard ensures that compressed air does not introduce impurities in highly sensitive manufacturing or medical processes that could affect product quality or patient safety.
3. special industry requirements
- food, medicine and other fields: These industries require extremely high cleanliness of compressed air and may require oil-free compressed air. In this case, an oil-free air compressor is required to ensure that the compressed air is completely oil-free and meets industry-specific health and safety standards.
4. the difference between the actual oil content and the nominal value
- actual oil content may be higher: Due to working conditions, maintenance and other factors, the actual compressed air oil content of the oil-injected screw air compressor may far exceed its nominal value. For example, the oil content of some compressed air is two to three orders of magnitude higher than the nominal value.
- Consequences of excessive oil content when the oil content of the compressed air is greater than 10ppm, it is commonly known as the air compressor flying oil. Air compressor flying oil will seriously affect the safe and stable operation of the air compressor system and post-processing system, resulting in frequent oil addition to the air compressor and failure of the post-processing system.
