Powder extinguishing system

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A powder extinguishing system (PLA) is a fixed (stationary) or vehicle-mounted fire extinguishing system with the extinguishing agent powder . Fixed powder extinguishing systems are used in industry and research to protect endangered production and storage areas. Vehicles with built-in powder extinguishing systems are mainly used by airport , plant and company fire departments .

Stationary powder extinguishing systems

Structure of the
stationary PLA

A powder extinguishing system works on the same principle as a rechargeable fire extinguisher . The system can optionally be triggered by a manual trigger device (e.g. by push button) or by an automatic flame or smoke detector . After triggering the extinguishing control center opens the pressure valves of the propellant bottles, whereby the extinguishing powder container is put under pressure. The extinguishing powder is now pressed through pipes to the extinguishing nozzles. Here the extinguishing powder escapes over the endangered area.
If the area to be protected is a closed room in which people are also present, it must be evacuated before the fire is extinguished, as there is a risk of suffocation. As a rule, a warning tone sounds here some time before the deletion begins.

Mobile powder extinguishing systems

A powder extinguishing system installed in a vehicle basically works like a stationary one. However, it is triggered or operated from a control station in the equipment room or the driver's cab. The extinguishing powder can be applied via high-pressure hoses and powder guns and via powder monitors ( turrets ) .

Fire fighting vehicles with powder extinguishing systems: PLF , ULF , SLF , TroTLF

Fire truck trailer with 250 kg extinguishing powder (P 250)

Mobile powder extinguishing systems can also be set up on trailers .

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  1. ↑ cf. Ortel, Erhard in Prendke, Wolf-Dieter: Lexikon der Feuerwehr, 2005, Kohlhammer Verlag, ISBN 3-17-018610-8
  2. ↑ Powder trailer PG 250. Beselich-Obertiefenbach volunteer fire brigade , accessed on December 4, 2018 (technical data and illustration).