@air
2025-04-01
What does the oil content of compressed gas mean by 5ppm?
“Oil content in compressed gas 5ppm” is an indicator describing the quality of compressed air, and the specific meaning is as follows:
1. Definition of ppm
- concentration units: ppm (parts per million) means “one part per million”, which is the mass of oil contained in each million parts of gas.
- conversion relationship: Under standard conditions (temperature 20 ° C, pressure 0.1MPa, humidity 65%), 1ppm = 1.2 mg of oil per cubic meter of air.
2. Industrial significance of 5ppm
- high quality standards: In industries such as food, medicine, and electronics that require extremely high gas purity, compressed gas oil content is usually required to be ≤5ppm. This standard means that the oil content in the air is extremely low, avoiding pollution to products and production processes.
- Equipment comparison：
- Oil injection screw air compressor: The oil content is generally 3-5ppm, and a high-efficiency oil and gas separator is required.
- oil free compressor: Oil content ≤0.01ppm, almost no oil pollution, suitable for scenarios with high cleaning needs.
3. actual application scenarios
| industry | application links | Oil content requirements | device selection |
|---|---|---|---|
| food/beverage | Filling, packaging, stirring | ≤1ppm | Oil-free air compressor or post-treatment purification |
| pharmaceutical | Pharmaceutical production, packaging, sterile environment | ≤0.01ppm | oil free compressor |
| electronic | Component manufacturing, cleaning and packaging | ≤1ppm | oil free compressor |
| precision instruments | Laboratory gas supply and instrument calibration | ≤0.01ppm | oil free compressor |
4. quality control measures
- regular testing: Use a compressed air quality detector to monitor whether the oil content meets the standard.
- equipment maintenance：
- Replace the oil and gas separation filter element (every 2000-4000 hours).
- Select high-quality lubricants to reduce oil volatilization.
- Add post-filter (such as activated carbon adsorption) to further reduce oil content.
5. future trends
- oil-free: With the advancement of material science, the cost of oilless air compressors has been reduced and traditional oil injectors have been gradually replaced.
- intelligent: Monitor oil content in real time through Internet of Things technology and automatically warn maintenance needs.
summary: 5ppm oil content represents the high cleanliness of compressed air and is suitable for most oil-sensitive industries. If you need to be completely oil-free, you need to choose an oil-free air compressor or add a multi-stage filtration device.
