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 …
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.
Pressure of a Fire Extinguisher – The Physics Factbook
There is not one set pressure for all fire extinguishers, they vary by class. The ones they use in firehouses are 690 kPa but the pressure in carbon dioxide extinguishers can go up to 5861 kPa. Victoria Poon — 2005
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.
People Also Ask how much pressure in a co2 fire extinguisher
What size CO2 fire extinguisher do I Need?
This process is so fast, it can cause ice to form on the horn, so never hold a CO2 fire extinguisher by the horn to avoid freezing your skin. To be most effective, a carbon dioxide fire extinguisher should be used no closer than 3 feet and no further than 8 feet from the fire itself. For the UK, they are commonly made in two sizes, 2kg and 5kg.
What happens if the pressure in a CO2 fire extinguisher drops?
The gas held under pressure in a CO2 fire extinguisher is in a stable state so long as the pressure is maintained. Should that pressure drop, due to a leaky or damaged valve, all that will happen is that the CO2 will simply turn to a gas and ‘hiss’ away harmlessly.
What is the pressure of a fire extinguisher?
There is not one set pressure for all fire extinguishers, they vary by class. The ones they use in firehouses are 690 kPa but the pressure in carbon dioxide extinguishers can go up to 5861 kPa.
What is the pressure gauge on a c02 fire extinguisher?
C02 fire extinguishers don’t have a pressure gauge because they use liquefied C02 (commonly known as dry ice) which as a chemical characteristic, always has a pressure of 830. Therefore a pressure gauge would always read 830 – making a gauge pointless. If there is no gauge, how do I check my fire extinguisher?
People Also Searches how much pressure in a co2 fire extinguisher
| carbon dioxide in fire extinguishers |
| fire extinguisher pressure gauge |
| portable co2 extinguisher |
| co2 fire extinguisher dangers |
| fire extinguisher pressure |
| automatic co2 fire extinguisher |
| amerex co2 fire extinguisher |
| co2 pressure gauge |
CO2 fire extinguisher hydralic pressure test Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher