Frequently, somebody who needs a fire quencher will purchase an ABC fire douser without really thinking about to the genuine fire risks they need to safeguard against. While purchasing fire dousers, you really want to know a few things about quenchers to settle on an educated choice, explicitly, the fire class you want to safeguard against and unique circumstances you want to consider (PC gadgets, for instance).
Classes of fire quenchers
With regards to fire quenchers, there are five classes of flames: A, B, C, D, and K.
Class A – Fire quenchers fire extinguisher evaluated for Class A flames have a green triangle with an “A” in the middle as well as a pictogram of a trash bin and wood consuming. These quenchers are utilized to extinguish fires for normal combustibles like paper, fabric, elastic, and a few plastics (materials that leave debris when consumed, consequently, the “A”).
Class B – Fire quenchers evaluated for Class B fires have a red square with a “B” in the middle as well as a pictogram of a gas can with a consuming puddle. These quenchers are utilized to douse fires for combustible fluids like gas, greasing up oil, diesel fuel, and numerous natural solvents tracked down in research centers (things tracked down in barrels, consequently “B”).
Class C – Fire quenchers evaluated for Class C flames have a blue circle with a “C” in the middle as well as a pictogram of an electric fitting with a consuming outlet. These quenchers are utilized to douse electrical flames for empowered electrical hardware, electric engines, circuit boards, switches, and instruments (“C” for flow electrical).
Class D – Fire quenchers evaluated for Class D flames have a yellow pentagram (star) with a “D” in the middle as well as a pictogram of a consuming stuff and bearing. These quenchers are utilized to douse fires from metals and metal composites like titanium, sodium, and magnesium.
Class K – Class K fire dousers are utilized explicitly for cooking fires from oil, fat, and cooking oil (“K” for kitchen).
You can get fire dousers with a solitary class rating or various fire class evaluations (ABC or BC, for instance).
Fire dousing materials
Fire dousers utilize various materials for quenching fires. While picking your douser, you want to figure out what sort of fire you might be battling and afterward pick the best stifling material for your application.
Water: Water, or APW, dousers utilize compressed water to smother fires. APW quenchers must be utilized for Class A flames (combustibles like paper, fabric, and so on); they can’t be utilized for extinguishing different classes of flames.
Dry substance: Dry synthetics are utilized to quench A-, B-, C-, or D-type fires. They work by putting a fine layer of substance dust on the material that is consuming. Dry synthetic quenchers are extremely viable at extinguishing fires. Be that as it may, dry synthetic dousers can be rough and destructive to gadgets and certain different materials.
Carbon dioxide: Carbon dioxide works by eliminating oxygen from the prompt area of the fire. Carbon dioxide quenchers are just at any point utilized for B (combustible fluid) and C (electrical flames) dousers. For PC, clinical and logical hardware, and airplane gadgets, carbon dioxide would be a preferable decision over dry compound dousers on the grounds that a carbon dioxide quencher leaves no buildup.
Metal/sand: Some class D fire quenchers utilize metal or sand, like sodium chloride (NaCl) or powdered copper metal, to cover fires from metals and metal composites.
Some fire dangers require specific quenchers. The following are a couple of instances of those applications.
Metal or sand quenchers are utilized to put outflank D (metal and metal composite) fires:
Salt (sodium chloride- – NaCl) is the most ordinarily involved material in metal/sand dousers. NaCl dousers function admirably with flames including magnesium, sodium, potassium, amalgams of potassium and sodium, uranium, and powdered aluminum.
Sodium carbonate dousers are additionally utilized on flames including sodium, potassium, and composites of potassium and sodium. Where stress erosion of hardened steel is a thought, this sort of fire quencher would be a preferable decision over a NaCl douser.
Powdered copper (Cu) metal is utilized for flames including lithium and lithium compounds.
Graphite powder dousers are utilized on lithium fires as well as flames that include high-liquefying point metals like titanium and zirconium.
Sodium-bicarbonate-put together dousers are utilized with respect to flames including metal alkyls and pyrophoric fluids.
Halotron I is a spotless specialist trade for Halon 1211, which was prohibited from use because of its ozone exhausting properties. Halotron I quenchers are utilized for dousing fires in PC rooms, clean rooms, and where broadcast communications hardware or gadgets are available. Halotron leaves no buildup and is nonconducting except for is more costly than carbon dioxide. It ought to be noticed that Halotron I will never again be delivered after 2015.
FE-36 (CleanGuard) dousers are one more spotless specialist substitution for Halon 1211. FE-36 dousers are less harmful than Halon 1211 and Halotron I and purportedly have no ozone-draining potential. FE-36 is likewise utilized for flames in PC rooms, clean rooms, and where broadcast communications hardware or gadgets are available. Not at all like Halotron I, FE-36 isn’t anticipated stage out.
Nonmagnetic fire quenchers: Any place solid magnets are being used, for instance, close to attractive reverberation imaging (X-ray) or atomic attractive reverberation spectrometers (NMRSs), nonmagnetic fire dousers ought to be picked. The solid attractive fields produced by this kind of hardware can make steel chamber fire dousers fly across a room with lethal force.
It is critical to guarantee that you have the legitimate fire quenchers for your current circumstance or potential fire risks. It very well may be the contrast between whether your fire is killed or causes a catastrophy.