How to Maintain EN 12021-Compliant Breathing-Air Systems
Simple Filter Maintenance for Spray Booths, Garages & Food Processing Plants
Published by Connexion Developments Ltd — Attention to Detail since 1998
Why Maintenance Matters
Clean, breathable compressed air isn’t just about filtration efficiency — it’s about staying compliant and preventing downtime. Connexion Developments’ UFR-UMF-UMFK 3-Stage Filter Regulator Sets make this easy, thanks to:
✅ Visual filter-status gauges that show exactly when to replace elements.
✅ Semi-automatic drains that clear water and oil automatically.
✅ Replacement filter elements always in stock — genuine spares for fast turnaround.
When to Replace Filter Elements
0.01 µm Red Coalescing Filter: Replace when the orange ball rises in the status indicator — it means airflow restriction or oil-loading.
5 µm Pre-Filter: Check weekly; replace if heavy water or dirt is found.
Activated Carbon Filter: Change at scheduled service intervals or if any odour appears downstream.
⚠️ Ignoring these signs risks reduced flow, oil carry-over, and loss of air quality compliance.
Replacement in Five Easy Steps
- Shut off air supply and isolate regulator.
- Remove the filter bowl (twist counter-clockwise).
- Unscrew the element holder and swap in the new element.
- Re-fit components, ensuring seals are clean and intact.
- Re-pressurise slowly and check for leaks before use.
Cleaning tip: wash bowls with water below +60 °C only.
Built for Real-World Reliability
Each unit is factory pressure-tested to 15 bar and silicone-free, making it ideal for paint-spray booths, breathing-air lines, and food-grade applications.
All models — ¼″ to 1″ BSP — deliver high flow and can maintain EN 12021-level purity when serviced correctly.
Stay Certified — Stay Ready
Logging your periodic air-quality checks is part of good workshop practice. Our own August 2025 independent test pass confirms that these filter sets meet EN 12021 targets for oxygen, dewpoint, CO, CO₂ and oil content when maintained according to the IOM instructions.
Order Genuine Spares Online
Replacement filter kits for ¼″–½″ models:
Replacement filter kits for ¾″ & 1″ models:
Full range of Breathing-Air Filter Sets:
Free next-day UK delivery on all stocked models and spares.