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Inert Gas

inert-gasMost Inert gas systems are a mixture of Argon, Nitrogen and in some cases a small amount of Co² all are colourless, odourless gases with a density slightly higher than air. Used for areas such as Electrical, EDP, flammable liquids, archive, gallery and artwork protection.

Inert gas is not a fire-extinguishing agent in the strict sense, but works like carbon dioxide by displacing atmospheric oxygen. The extinguishing mechanism is purely physical in nature, reducing the oxygen concentration to below the specific threshold level required by the combustible material for combustion to be maintained. With this mechanism, the fire assists in its own extinction, consuming oxygen in the flames, and the larger the flames at the start of discharge, the more rapid the reduction in oxygen level.

Unlike the chemical agents, Inert gas does not break down in the flames to form hydrogen fluoride or other toxic/corrosive gases, so does not contribute to corrosive damage to equipment. The burning material itself may produce toxic/corrosive gases as a product of combustion, and to limit damage from these, detection and extinction should be as rapid as possible.

  • No hazard to personnel at normal concentrations, even if trapped in room during discharge.
  • Density slightly higher than air, giving excellent mixing upon discharge and increased retention times.
  • Available worldwide.
  • Low container refill cost.
  • Genuine ‘clean agent’, with no agent breakdown adding to toxic or corrosive products of combustion from the fire.
  • Absolutely no environmental disadvantages, short or long term – a genuine green alternative.
  • Argon and Nitrogen are noble gases and are chemically inert. They are present in the earth’s atmosphere. Additionally, for fire protection, Inert gas has the benefits of no fogging of room atmosphere upon discharge, minimal short term room cooling so avoiding condensation on equipment, and straightforward system engineering, allowing long pipe runs from cylinders to nozzle.