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.
How much force does a fire extinguisher produce?
Water fire extinguishers are pressurized with air to approximately 150 pounds per square inch (psi)—five times a car tire pressure—from a compressor. A squeeze-grip handle operates a spring-loaded valve threaded into the pressure cylinder.
How much pressure is in a fire extinguisher?
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.
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.
How do you check the pressure in 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 is the main cause of death in fire?
The characteristic biphasic distribution of carboxyhemoglobin in fire victims together with other observations suggest that the principal causes of death are carbon monoxide followed by carbon dioxide poisoning and/or oxygen deficiency, while the influence of heat is considered to be of minor importance.
Would a fire extinguisher explode in space?
Sure. A fire extinguisher makes a perfectly good, if low thrust, rocket. Indeed, when astronaut Ed White performed the first American spacewalk in 1965, on Gemini 4, he used a little oxygen gun in much this way.
Which part of fire extinguisher should pull first to unlock it?
For an easy-to-remember 4-step process to operating a fire extinguisher, learn the PASS system: Pull the pin while holding the extinguisher away from you to unlock the mechanism. Aim low toward the base of the fire. Squeeze the lever slowly.