Extinguishing Agents 4
Extinguishing Agents 4 : Types of: Water: Cools burning material. APW (Air pressurized water) cools burning material by absorbing heat from burning material. Effective on Class A fires, it has the advantage of being inexpensive, harmless, and relatively easy to clean up. In the United States, APW units contain 2. 5 gallons (9 liters) of water in a tall, stainless steel cylinder. In Europe, they are typically mild steel lined with polyethylene, painted red, containing 6-9 liters (1. 75-2. 5 gallons) of water. Water Mist uses a fine misting nozzle to break up a stream of deionized water to the point of not conducting electricity back to the operator. Class A and C rated. It is used widely in hospitals for the reason that, unlike other clean-agent suppressants, it is harmless and non-contaminant. These extinguishers come in 1. 75 and 2. 5 gallon units, painted white in the United States and red in Europe
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