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Foam Systems
This extinguishing system is very similar to a sprinkler system in its mode of operation. However, a foaming agent and ambient air are mixed into the extinguishing medium water. The result is an increased extinguishing capacity of the water.
- The extinguishing foam is a mixture of water, foaming agent and air.
- The mixing ratio of these three contents is adapted to the object to be protected.
- The choice of the right type of foam (low expansion foam, medium expansion foam, low expansion foam) is determined by the particular application.
- In the event of a fire, a closed, temperature-resistant foam blanket is laid over the source of the fire. The foam blanket prevents the fire from spreading and smothers the fire.
- This system is used when water or other extinguishing systems cannot achieve the desired effect.
Heavy foam
Low expansion foam is a wet foam with which good throwing distances are achieved. It is mainly used for fires involving solids or liquids (fire classes A and B). The most important effects contributing to firefighting here are the cooling effect and the separating effect, as low expansion foam adheres to surfaces.
Medium expansion foam
Medium expansion foam is already significantly lighter than low expansion foam and can be piled up to five meters high. Its adhesion to surfaces is reduced, so that medium expansion foam is used for flooding objects. Medium expansion foam achieves its extinguishing effect mainly through the separating effect and, to a lesser extent, through the cooling effect.
Light foam
Light foam is already distributed by light wind. Therefore, lightweight foam is not thrown, but only used in enclosed spaces. Under the influence of heat, the foam quickly decomposes into very fine water droplets. This results in an increased cooling effect as an extinguishing effect. In contrast to medium and low expansion foam, a special generator is required to produce low expansion foam.
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