Oil-containing standard for outlet oil injection screw air compressor

The oil content of the oil injected screw air compressor outlet usually requires no more than 3 ppm (i.e. the oil content in compressed air per cubic meter is not more than 3 mg).

The following is a detailed explanation of the oil-containing standard for the outlet of the oil injection screw air compressor:

1. Overview of the standard

• Standard value: During the operation of the oil injection screw air compressor, due to the presence of lubricating oil, the compressed air will contain a certain amount of oil. However, this oil content is clear, usually not exceeding 3ppm to ensure the purity of compressed air and safety of use.

2. Standard basis

• International and domestic standards: The export oil content standards of oil injection screw air compressors are usually stipulated by relevant international, national or industry standards. For example, ISO 8573-1 is one of the important international standards for testing oil content of air compressors, which stipulate different grades of oil content, but oil injection screw air compressors usually find it difficult to meet the standards of oil-free or extremely low oil conditions. In China, according to the “Air Compressor Pollutant Emission Standard” (GB/T 3785-2006), although it is stipulated that the oil content in the air emissions of screw air compressors should not exceed 5mg/m³, oil injection screw air compressors generally follow the stricter 3ppm standard.

3. Impact of exceeding the standard

• Equipment failure: When the oil content in compressed air exceeds 3ppm, failures such as “high fuel consumption” or “flying oil” may occur. This will not only increase the operating cost of the air compressor, but may also cause pollution and damage to post-treatment equipment (such as dryers, precision filters, etc.).
• Product quality: Excessive oil content may also have adverse effects on the quality of products using compressed air, especially in industries such as medicine, food, beverages, and electronics that require extremely high purity of compressed air.

4. Countermeasures

• Regular maintenance: Check and replace oil and water separators, filter elements and other components regularly to ensure the quality of compressed air and the normal operation of the equipment.
• Adjustment parameters: According to the actual operating conditions of the air compressor and the gas needs, appropriately adjust the operating parameters of the air compressor, such as pressure, temperature, etc. to reduce fuel consumption.
• Use high-quality lubricant: Selecting high-quality lubricant suitable for air compressor models and usage environments can reduce oil production and emissions.

5. Precautions

• Differences in equipment models: Different oil injection screw air compressor models and application scenarios may have different requirements for the oil content of the outlet. Therefore, in specific applications, reference should be made to the technical specifications of the equipment and the manufacturer’s recommendations.
• Changes in industry standards: With the continuous advancement of technology and the improvement of environmental protection requirements, the standards for oil content in air compressors may change. Therefore, it is recommended to pay attention to relevant industry standards and technical trends regularly.

To sum up, the standard for oil content at the outlet of the oil injection screw air compressor usually requires no more than 3ppm. In actual use, this standard should be strictly followed and effective measures should be taken to ensure the purity and safety of compressed air.