An extinguisher needs enough charge so that when it is discharged, there is an ample amount of dry chemical with a velocity sufficient enough to propel the chemical 10-20 feet. The range of a properly charged extinguisher is between 185-205 p.s.i. This value is displayed on the pressure gauge.
What is the pressure of fire extinguisher?
Compressed air foam system (CAFS): The CAFS extinguisher (example: TRI-MAX Mini-CAF) differs from a standard stored-pressure premix foam extinguisher in that it operates at a higher pressure of 140 psi, aerates the foam with an attached compressed gas cylinder instead of an air-aspirating nozzle, and uses a drier foam …
Is a fire extinguisher under pressure?
How Does A CO2 Fire Extinguisher Contain So Much Gas? CO2 gas is held in the fire extinguisher under pressure, normally around 55 bars at room temperature.
How do you release the pressure from a fire extinguisher?
To release pressure, squeeze the top to let out a bit of extinguishing agent. You should not release the entire contents of the bottle; rather, you simply want to start the pressure release process. Once you have done this, wait for the needle on the gauge to fall to zero—this could take a few hours up to a few days.
What is a class B type fire?
Class B: Flammable liquids such as alcohol, ether, oil, gasoline and grease, which are best extinguished by smothering.
Should employees use fire extinguisher?
Having fire extinguishers in a building will not improve its fire safety unless occupants are sufficiently trained to use them. Therefore, it is imperative that employees undergo appropriate fire extinguisher training specifically designed for the building they are in.
What is the best defense against fire?
As always, the best defense against a fire is to be prepared. Take a moment to look at your fire extinguisher.
How do you test the pressure gauge on a fire extinguisher?
Most fire extinguishers should have a pressure gauge with a red section and a green section. If the needle is in the green, you’re good. If your extinguishers don’t have a pressure gauge and you want to test them, press in the pin. If it pops back up, the extinguisher is pressurized.
What do you do with an empty fire extinguisher?
For fully or partially charged fire extinguishers, call your local fire department and ask if you can drop off expired fire extinguishers at the firehouse. If they don’t accept old canisters, take your extinguishers to a hazardous waste disposal facility.