Compressed Air Quality Grade Comparison Table (Class 0 vs Class 1)
comparison of 1. core indicators
| indicator category | Class 0 (very high cleanliness) | Class 1 (high cleanliness) |
|---|---|---|
| oil content | <0.01mg/ m³ (Almost no oil) | ≤0.1mg/ m³ (trace oil) |
| particulate matter concentration | < 0.1μm (no visible particles) | ≤0.1μm (Very few particles) |
| moisture content | pressure dew point ≤ -70℃ (Absolutely Dry) | pressure dew point ≤ -40℃ (deep dry) |
analysis of 2. Technical Differences
- filtration accuracy
- Class 0: three-stage filtration system (primary filtration precision filtration activated carbon adsorption) is required, and the precision of the last stage filter element reaches 0. 01μm, can intercept virus-grade particles.
- Class 1: two-stage filtration (primary precision filtration) is usually used, and the filter element accuracy is 0. 1μm to meet the protection needs of conventional pneumatic components.
- drying technology
- Class 0: Adsorption dryers (such as molecular sieve dryers) must be used to reduce the dew point temperature below -70°C through physical adsorption.
- Class 1: A refrigerated dryer can be used to cool the compressed air through a refrigerant to condense and discharge moisture, and the dew point temperature can reach- 40℃.
3. typical application scenarios
| industry field | Class 0 applicable scenario | Class 1 applicable scenario |
|---|---|---|
| pharmaceutical Manufacturing | sterile drug production, cell culture gas supply | general pharmaceutical filling, packaging equipment power |
| food Processing | infant Formula Spray Drying, Aseptic Packaging | beverage bottle blow molding, food conveying pneumatic control |
| electronic Manufacturing | chip etching, LCD panel cleaning | air supply for SMT mounter and wave soldering machine |
| automobile Manufacturing | engine block spraying, fuel cell assembly | tire inflation, welding robot action control |
4. inspection and maintenance requirements
- quality Inspection
- Class 0: monthly microbiological testing (total number of colonies ≤ 10CFU/ m³) and particle laser detection.
- Class 1: Quarterly oil content detection (using infrared spectroscopy) and dew point temperature verification.
- System Maintenance
- Class 0: filter element replacement period ≤ 2000 hours, desiccant regeneration period ≤ 4000 hours.
- Class 1: filter element replacement period ≤ 4000 hours, condenser cleaning period ≤ 8000 hours.
5. selection recommendations
- Class 0 Selection Principles
- direct contact with the product or process medium gas supply link (such as food packaging gas).
- High-precision manufacturing scenarios (e. g. fiber drawing, hard disk head assembly).
- Class 1 Scope
- general pneumatic control system (such as cylinder, solenoid valve drive).
- Auxiliary gas supply for products that are not in direct contact (e. g. equipment cleaning, material conveying).
Conclusion
the core difference between Class 0 and Class 1 compressed air is the cleanliness control accuracy. The former is suitable for process links with extremely high air quality requirements, and the latter can meet the needs of conventional industries. Enterprises in the selection should be based on specific application scenarios, process requirements and cost budget comprehensive assessment, while establishing a sound quality testing and maintenance system to ensure that the quality of compressed air continues to meet the standard requirements.
