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Dry Particulate
Limit solid particles by class to protect valves, actuators, and instrumentation.
Compressed Air Systems Engineered for Savings
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ติดต่อทีมวิศวกรRequired Compressed Air Quality
Air purity needs vary by process. From general manufacturing to strict ISO 8573-1 for food, pharma, and medical use, we design systems that deliver the right cleanliness and dryness.
Total Moisture
Specify pressure dewpoint for your process to prevent corrosion and product defects.
Oil Carryover
Control aerosol/liquid/vapor oil content to safeguard product quality and safety.
ISO 8573-1 Compressed Air Quality (Purity) Classes
Format: class [A],[B],[C]Specify purity by document and revision (ISO 8573-1:2010), then select a class for each contaminant. Example: 1:2:1 = Class 1 particulates, Class 2 moisture, Class 1 oil (at reference conditions).
| Class | Dry Particulate [A] (max count / size) | Moisture [B] (Pressure Dewpoint) | Oil [C] (Total mg/m³) |
|---|---|---|---|
| 0 | As specified by user/supplier (stricter than Class 1) | ||
| 1 | Very low particulate (e.g., ≤20,000 @ 0.1–0.5µm) | ≤ −70 °C PDP | 0.01 |
| 2 | Low particulate (e.g., ≤400,000 @ 0.1–0.5µm) | ≤ −40 °C PDP | 0.1 |
| 3 | Moderate particulate (≤90,000 @ 0.5–1µm) | ≤ −20 °C PDP | 1 |
| 4–6 | Progressively higher particle levels by class | ≤ +3 °C to ≤ +10 °C PDP | 5–10 |
| X | Above Class 6 particle limits | > +10 °C PDP | > 10 |
Notes: Class “0” must be defined in writing; Class “0” label alone does not mean oil-free. Always verify test method capability for the class claimed.
PURITY CLASSIFICATION — Typical Use by Industry Level
Level 1
ISO 8573-1 Classes 5–6- Tire filling & general shop air
- Air tools & sandblasting
- Grinding and basic utilities
Level 2
ISO 8573-1 Classes 3–4- Spray painting & powder coating
- Automotive assembly & packaging
- Textiles, plastics/blow molding
Level 3
ISO 8573-1 Classes 0–2- Laboratory & cleanroom
- Pharma, food & beverage
- Medical/breathing air, electronics
Guidance only—confirm exact purity class with your process, regulations, and QA standards.
Highlight Products
Compressed Air Drying and Filtration
Air purity starts with two essential elements in system design: drying and filtration. Our air dryers remove excess moisture, delivering reliable dry air for everyday or critical applications. Inline filters then capture oil, vapors, and particulates to ensure consistent purity. Together, they protect your equipment, reduce downtime, and keep your operations running at peak efficiency.
Design Smarter : 6 More Essentials in Compressed Air System Design
Save energy, lower costs, and ensure reliable clean air. Whether building new or upgrading, Domnick (Thailand) delivers expert compressed air system design tailored to your needs.
