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AGAS - Together we can

Oxygen-Free Nitrogen (OFN)

Oxygen Free Nitrogen (OFN) is used for leak detection, strength and pressure testing and reducing oxidation when brazing.

Product Information




  • Available from A‑Gas wholesale partners - find your local distributor for further details
  • Store cylinders in a cool, dry, well-ventilated area, out of direct sunlight
  • A‑Gas operates a returnable cylinder fleet - empty cylinders are to be returned to an A‑Gas wholesale partner
  • For alternative or larger package sizes please contact A‑Gas on 1800 002 427 or via the Contact Us form


Commercial Refrigeration and Air Conditioning

Industrial Refrigeration and Air Conditioning

Domestic Air Conditioning


*Leak testing of RAC systems, strength and pressure testing, cleaning condenser coils, for use alongside Braze-A‑Gas® to reduce oxidation and scale build-up when brazing thus preventing blockages in the system

Product Features and Benefits

  • Cylinder fitted with a non-return valve to ensure that the nitrogen supply is free of contaminants
  • A‑Gas OFN is 99.998% pure and has less than 10PPM oxygen and less than 2PPM moisture
  • A high-pressure gas, use a certified nitrogen regulator
  • High-impact guard made to EN1964 standard
  • Non-flammable and non-toxic compressed gas
  • Cylinder outlet connection is 5
  • 8” BSP Male Type 50, a standard fitting size for nitrogen regulators
  • It won’t contaminate a refrigeration system and prevents scale build-up

The information contained within this website is for guidance only - for further system-specific advice please contact us directly.

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