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Fire suppression using inert gases

Fire extinguishing systems using inert gases are particularly useful in areas with challenging protection requirements. These may include areas containing irreplaceable cultural assets or sensitive technology, situations that require maximum extinguishing system availability, or protected areas at especially great risk due to high fire loads, electrical energy or hazardous materials. Inert gases extinguish fires without leaving residues, thus eliminating the possibility of consequential damage of the type caused by using water, foam, powder or chemical extinguishing gases. Moreover, in typical fire scenarios, inert gases do not react chemically in any way. They are non-toxic and non-conductive, making them ideal for use in electrical and electronic systems.

  • Nitrogen is a natural extinguishing gas.
  • It is a very effective extinguisher. 
  • WAGNER was the first provider to use nitrogen in its extinguishing technology. 
  • Nitrogen has a similar density to air and spreads homogeneously throughout the room, so its extinguishing effects are correspondingly uniform. 
  • It is readily available and easy to obtain – 78.09 % vol. of the atmosphere is made up of nitrogen. 
  • Very low refilling costs. 
  • Nitrogen is universally available and highly versatile. 
  • Argon is a non-toxic noble gas comprising around 0.93 % vol of the atmosphere. 
  • Argon is one inert gas that does not form any chemical compounds, even under extreme conditions. 
  • Due to its inert nature, argon can also be used to fight very high-temperature fires. 
  • Argon’s high specific weight (38% heavier than air) makes it ideal for extinguishing in areas with fire loads near the floor, such as in raised floors. 
  • Low refilling costs. 
  • IG-541 is a mixture made of natural inert gases that makes use of their individual benefits. 
  • It is made of 52 % vol. nitrogen, 40 % vol. argon and 8 % vol. carbon dioxide. 
  • IG-541’s composition makes refilling costs somewhat higher than with nitrogen or argon systems. 

1. Air sampling smoke detector system: Continuously analyses the room air actively by taking air samples and detects even minimal smoke production as early as possible 
2. Pressure relief: Prevents an impermissible rise in pressure when the extinguishing zone is being flooded 
3. Smoke detectors: Monitor the extinguishing zone and send an alarm to the extinguishing control panel if smoke is detected 
4. Gas extinguishing nozzles: Distribute extinguishing gas uniformly throughout the entire extinguishing area
5. Acoustic and optical alarm devices: Ensure that everyone is able to evacuate the protected area during the preliminary warning period
6. Manual release Makes it possible to activate the extinguishing system manually if a fire is discovered 
7. Fire detection / extinguishing control panel: Processes fire detection signals, triggers alarm and floods the extinguishing zone after the specified preliminary warning period 
8. Extinguishing cylinders: Hold 80 or 140 litres of non-liquefied extinguishing gas under 300 bar pressure, supplied individually or in space-saving cylinder batteries