CAIN SAFETY FIRE PROTECTION, INC.
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DIFFERENT TYPES OF FIRE EXTINGUISHERS


The Fire Extinguisher must be appropriate for the type of fire being fought. Multipurpose fire extinguishers, labeled ABC, may be used on all three classes of fire. If you use the wrong type of extinguisher, you can endanger yourself and make the fire worse. It is also very dangerous to use water or an extinguisher labeled only for Class A fires on a cooking-grease or electrical fire.

Depending on their intended use, portable extinguishers store specific "extinguishing agents," which are expelled onto the fire. ​
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The Types of Fire Extinguishers include:
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  • PRESSURIZED WATER MODELS - are appropriate for use on Class A fires only. These must never be used on electrical or flammable-liquid fires. 
  • CARBON DIOXIDE - extinguishers contain pressurized liquid carbon dioxide, which turns to a gas when expelled. These models are rated for use on Class B and C fires, but can be used on a Class A fire. Carbon dioxide does not leave a residue.
  • DRY CHEMICAL ​- extinguishers are either stored-pressure models or cartridge-operated models. The stored-pressure models have a lever above the handle for operation. The cartridge-operated models require two steps: Depress the cartridge lever, and then squeeze the nozzle at the end of the hose. The dry chemicals leave a residue that must be cleaned up after use.
  • AMMONIUM PHOSPHATE - dry chemical can be used on Class A, B, and C fires, but should never be used on a fire in a commercial grease fryer because of the possibility of reflash and because it will render the fryer's automatic fire-protection system less effective.
  • SODIUM BICARBONATE - dry chemical, suitable for fighting Class B and C fires, is preferred over other dry-chemical extinguishers for fighting grease fires. Where provided, always use the extinguishing system first. This also shuts off the heat to the appliance.
  • POTASSIUM BICARBONATE, UREA-BASE POTASSIUM BICARBONATE, &  POTASSIUM CHLORIDE - dry chemical are more effective and use less agent than sodium bicarbonate on the same fire.
  • FOAM (or AFFF & FFFP) EXTINGUISHERS - coat the surface of a burning flammable liquid with a chemical foam. When using a foam extinguisher, blanket the entire surface of the liquid to exclude the air.
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CAIN SAFETY FIRE PROTECTION INC.  |  244 COLUMBUS AVENUE  |  P.O. BOX 385  |  TIMMINS, ONTARIO P4N 7E3
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