CO2 gas is held in the fire extinguisher under pressure, normally around 55 bars at room temperature. By comparison, pressure cookers operate at 1 bar of pressure, modern car tyres are usually inflated to a maximum of 2.5 bars, whilst airliner tyres are inflated at up to 14 bars. At a pressure of 55bars, around two-thirds of a carbon dioxide fire extinguisher’s contents are in a …
How Carbon Dioxide Fire Extinguishers Work. CO2 extinguishers stores carbon dioxide gas under great pressure (55 bar or 825psi), where the gas becomes a liquid. When you operate the fire extinguisher levers, the pressure is released, the CO2 pressure is reduced by the diffuser (horn) and expands back into a gas, rapidly cooling the surrounding air.
Why Don’t C02 Fire Extinguishers Have a Pressure Gauge?
How does a CO2 fire extinguisher work? Although CO2 is stored in its solid form, once the pressure is released from the fire extinguisher and the CO2 is released into room temperature (or anything warmer than -110 degrees Fahrenheit) it immediately changes into a gas.
To my knowledge the CO2 extinguisher pressure at room temperature is about 55 bar, which is not enough to liquify the CO2. But the gas has clearly got enough compression to do all the things Tom is describing with regards to cooling during expansion. Harry
People Also Ask how much pressure is in a co2 fire extinguisher
What is the pressure of a CO2 extinguisher?
To my knowledge the CO2 extinguisher pressure at room temperature is about 55 bar, which is not enough to liquify the CO2. But the gas has clearly got enough compression to do all the things Tom is describing with regards to cooling during expansion
How does CO2 extinguish a fire?
One of the obvious reasons CO2 works to extinguish the fire is the low temperature of the dry ice combating the high temperatures of the fire resulting in an intense cooling effect. CO2 is also heavier than oxygen so when the co2 is shot at the base of the fire it will displace the necessary oxygen to keep the fire burning.
How does a fire extinguisher compare to a pressure cooker?
By comparison, pressure cookers operate at 1 bar of pressure, modern car tyres are usually inflated to a maximum of 2.5 bars, whilst airliner tyres are inflated at up to 14 bars. At a pressure of 55bars, around two-thirds of a carbon dioxide fire extinguisher’s contents are in a liquid state, with a gaseous top layer.
Are CO2 fire extinguishers safe to use?
Although in its normal concentration CO2 is very safe, when it is pressurized and in its liquid form, it can burn your skin. The long plastic horn or dispenser on these fire extinguishers are to prevent skin contact.
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CO2 fire extinguisher hydralic pressure test Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher