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Inert gases

PROINERT® Inert Gas Fire Protection System

Cost-Effective Inert Gas Fire Protection

Fike’s PROINERT2 is the safest, most economical natural fire protection solution available in inert gases IG-55, IG-541, IG-100 or IG-01.


Inert gas fire suppression systems are a safe, natural way to extinguish a fire. They are flexible with a choice of agents, offering low cost of ownership due to the economic refill cost after discharge.

Due to inert gases exceptionally low reactivity, they are non-toxic and non-combustible, which makes them preferable to use in situations to where other gases would be unsafe. Also, they can be used to prevent or suppress unsafe reactions imposing any risks. For example, inert gas fire suppression systems work by displacing the oxygen needed to sustain a fire, which can limit the spread of a fire or even extinguish it entirely. They are common in workplaces where electrical fires pose a significant elevated risk.

Pure Inert gases and the constituents of the mixed versions are found in the atmosphere naturally. These gases are environmentally responsible, having zero ozone depletion potential and a zero global warming potential.

IG-55 (50% ARGON 50% NITROGEN)


IG-55 is an inert gas blend consisting of 50% argon and 50% nitrogen. This type of extinguishant can be used as complete flooding fire suppression systems protecting hazards against many flammable substances. IG-55 suppression systems are useful where an environmentally acceptable fire extinguishing system is required.

IG-541 (Nitrogen, Argon & CO2)


Extinguishant IG-541 is an odourless, colourless, electrically non-conductive gas with the same density as air. It is an inert gas blend consisting nominally of 52% nitrogen, 40% argon and 8% carbon dioxide, with the following blend specification (based on 8% carbon dioxide with a tolerance of + 5%).

IG-100 (Pure nitrogen)


Nitrogen is an inert gas naturally present in the atmosphere; therefore, it has zero greenhouse effects and zero ozone layer depletion potential. It is chemically inert, colourless, non-conductive and odourless.

Key points


Cylinders available in 200 bar & 300 bar pressure options

300 bar option reduces the cylinder quantity compared to 200 bar

Cylinders available in 80 litre & 140 litre capacity options

Nozzles available with 180- and 360-degree discharge patterns

Cylinders are suitable to store at temperatures from -4°to 130°F (-20° to 54°C)

Selector valve sizes range from 1” to 4” (25 to 100 mm nominal)

Environmentally friendly (zero ozone depletion)

Suitable for electronic equipment protection as non-conductive

No clean-up required after discharge as the agent is clean

Environment to use inert gas system


With very low reactivity, inert gases are non-combustible and nontoxic, which makes them preferable in applications where other gases may not be safe as it eliminates any danger that the gas will react if it’s around potentially hazardous settings.