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Oxygen Free Nitrogen (OFN)

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

Product Information

  • Available from A‑Gas and wholesale partners.
  • Store cylinders in a cool, dry, well-ventilated area, out of direct sunlight
  • For available package sizes please contact A-Gas on 0800 992 427 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 call A‑Gas directly.