Fire extinguishers are extremely important as they are the most commonly used for of fire protection. In many cases they are a first line of defense and often contain or extinguish a fire, preventing costly damage. These often overlooked devices can be a key component towards keeping you safe during a fire emergency situation.
Almost all portable dry chemical fire extinguishers are pressurized to 195 psi, and the head is put together in such a way as there is a valve stem poking out of the top of the fire extinguisher. The pin is then slotted through the top piece of the handle so the handle sits just above the valve stem, and an EZ break tamper seal (15lb break pressure) tied around the handle and pin to hold the …
Fire extinguisher – Wikipedia
Fire extinguishers are designed to remove at least one of these elements so that a fire will die out. There are several different ways of doing this, as we’ll see in the next section. Advertisement
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How do fire extinguishers work?
Fire extinguishers are sturdy metal cylinders filled with water or a smothering material. When you depress a lever at the top of the cylinder, the material is expelled by high pressure, similar to the way material is forced out of an aerosol can. The diagram below shows a typical design. This content is not compatible on this device.
Why is fire extinguisher not effective on Class A fires?
This agent is not generally effective on class A fires because the agent is expended and the cloud of gas dissipates quickly, and if the fuel is still sufficiently hot, the fire starts up again. While liquid and gas fires do not usually store much heat in their fuel source, solid fires do.
Why do you need a fire extinguisher in your apartment building?
For apartment building and medical centers the presence of a fire extinguisher can provide incredible benefits. The mere presence of a fire extinguisher can have a significant impact towards diminishing the damage caused by a fire.
What type of fire extinguisher is used to extinguish a fire?
Unlike powder, foam can be used to progressively extinguish fires without flashback. Aqueous film-forming foam ( AFFF ), used on A and B fires and for vapor suppression. The most common type in portable foam extinguishers.
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How an Amerex Fire Extinguisher is made – BrandmadeTV Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher