Uses monoammonium phosphate - a dry chemical that is able to quickly put out the fire. It is a pale yellow powder that is able to put out all three classes of fire; Class A for trash, wood and paper, Class B for liquids and gases, and Class C for energized electrical sources.
Specifically for restaurant kitchen hazards. They contain a special potassium acetate based agent.
A supersonic nozzle disperses microscopic 'dry' water mist particles to suppress fires and extinguish burning materials. The particles are attracted by the fire they cool the fire and reduce oxygen content
A specialty type of fire extinguisher that contains a gas that interrupts the chemical reaction that takes place when fuels burn. Often used to protect valuable electrical equipment since they leave no residue.
Every stored, rechargeable, portable fire extinguisher requires a 6 year maintenance check. During this check a technician will perform a detailed inspection of the inside of the extinguisher and check the outside for cracks, leaks, or abnormalities, as well as cleaning the extinguisher and refilling it
Hydrostatic testing involves subjecting the fire extinguisher cylinder to pressure that is greater than its rating. This is done to ensure that the extinguisher is capable of maintaining the pressure that is needed to discharge properly in the event of a fire.
Fire extinguishers need to be recharged periodically through out their life cycle even if they haven't been used. If a fire extinguisher is used, but the extinguishing agent was not completely expelled it will need a recharge. They may also need a recharge due to environmental factors or damage that can cause the extinguisher to become depressurized.