Class 0 Level 1 compressed air comparison table
Compressed air quality grade comparison table (Class 0 vs Class 1)
1. Comparison of core indicators
| index category | Class 0 (extremely high cleanliness) | Class 1 (high cleanliness) |
|---|---|---|
| oil content | <0.01mg/m³ (almost oil-free) | ≤0.1mg/m³ (trace oil) |
| particulate matter concentration | <0.1μm (no visible particulate matter) | ≤0.1μm (very few particles) |
| water content | Pressure dew point ≤-70℃ (absolute dry) | Pressure dew point ≤-40℃ (deep drying) |
2. Analysis of technical differences
- filtration precision
- Class 0: A three-stage filtration system (primary filtration + precision filtration + activated carbon adsorption) is required. The accuracy of the final filter element reaches 0.01μm and can intercept virus-grade particles.
- Class 1: Usually two-stage filtration (primary + precision filtration) is used, with a filter element accuracy of 0.1μm, which meets the protection needs of conventional pneumatic components.
- drying technology
- Class 0: An adsorption dryer (such as a molecular sieve dryer) must be used to reduce the dew point temperature below-70℃ through physical adsorption.
- Class 1: A freezing dryer can be used to cool the compressed air with refrigerant to condense and discharge water, and the dew point temperature can reach-40 ℃.
3. Typical application scenarios
| industry sectors | Class 0 application scenarios | Class 1 applicable scenarios |
|---|---|---|
| pharmaceutical manufacturing | Air supply for sterile drug production and cell culture | Power of general pharmaceutical filling and packaging equipment |
| food processing | Infant formula powder spray dried, sterile packaging | Pneumatic control for beverage bottle blow molding and food transportation |
| electronics manufacturing | Chip etching, LCD panel cleaning | Air supply for SMT mounter and wave soldering machine |
| automobile manufacturing | Engine block spraying and fuel cell assembly | Action control of tire inflation and welding robot |
4. Testing and maintenance requirements
- quality inspection
- Class 0: Microbial testing (total number of colonies ≤10CFU/m³) and particulate matter laser testing are required every month.
- Class 1: Oil content testing (using infrared spectroscopy) and dew point temperature verification are performed quarterly.
- system maintenance
- Class 0: Filter element replacement cycle ≤2000 hours, desiccant regeneration cycle ≤4000 hours.
- Class 1: Filter element replacement cycle ≤4000 hours, condenser cleaning cycle ≤8000 hours.
5. Selection suggestions
- Class 0 Selection Principles
- Gas supply links that directly contact the product or process medium (such as inflation in food packaging).
- High-precision manufacturing scenarios (such as optical fiber drawing, hard disk head assembly).
- Class 1 scope of application
- Universal pneumatic control system (such as cylinder, solenoid valve drive).
- Auxiliary gas supply that is not in direct contact with products (such as equipment cleaning, material transportation).
conclusion
The core difference between Class 0 and Class 1 compressed air lies in the accuracy of cleanliness control. The former is suitable for process links with extremely high air quality requirements, while the latter can meet general industrial needs. When selecting models, enterprises should comprehensively evaluate specific application scenarios, process requirements and cost budgets, and at the same time establish a sound quality inspection and maintenance system to ensure that the quality of compressed air continues to meet standard requirements.