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Carbon Dioxide Cartridges for portable fire extinguishers
The first type is found inside cartridge type fire extinguishers. These are usually used in marine environments where reliability is required. So how do we tell it is a cartridge type fire extinguisher? For cartridge type fire extinguishers, there are usually no pressure gauges to be found. These cartridges are usually red
Unlike stored pressured fire extinguishers which are always pressurized, cartridge type fire extinguishers are never pressurized until required. During operation, the lever is depressed and the co2 cartridge is punctured. Carbon dioxide is quickly released and pressurizes the fire extinguisher.
So why are they much more reliable than the usual fire extinguishers with a pressure gauge? The co2 cartridge has a solid seal which keeps all the carbon dioxide propellant in the tiny cartridge. If it is never punctured, leakage is impossible.
