ONE SEVEN – TECHNOLOGY

MODE OF OPERATION

One Seven extinguishing foam has several effects, which lead to very effective and secure results in their interaction:

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• COOLING: The water contained in the extinguishing foam evaporates and thus withdraws heat energy from the fire.

• SEPARATION: The blanket of foam separates the burning material from the oxygen in the air and thus smothers the fire.

• ISOLATION: The foam blanket prevents the evaporation of flammable gases from the hot material. This is especially relevant for liquid fires.

• INSULATING: Extinguishing foam is a bad heat conductor. A foam layer adhering to hot surfaces therefore shields the environment from heat. Likewise inflammable surfaces can be protected from ignition by heat radiation.                                                                                                                                                                                                                                     

In the One Seven® technology one part of water produces seven parts of foam. As a result the effective surface of the extinguishing agent increases significantly which contributes to particularly fast and efficient firefighting.

The production of One Seven® compressed air foam consumes considerably less water than other extinguishing methods. Thus the water storage can be made smaller or the operating times with conventional tanks extend. Due to the low water consumption damages caused by extinguishing water are reduced and less contaminated extinguishing water has to be disposed.                                                                                                        

ADVANTAGES OF ONE SEVEN COMPRESSED AIR FOAM

LARGE SURFACE DUE TO FINE FOAM STRUCTURE   |   High cooling effect                                                            

OPTIMAL ADHESION   |   Cools long-term, separates burning material from oxygen                                  

HIGH KINETIC ENERGY CONTENT   |   Large throwing distance, high spatial coverage, safety for firefighters                        

DISSOLVES SURFACE STRUCTURE OF WATER   |  High penetration, extinguishes even deep-seated pockets of embers

LOW WATER CONSUMPTION   |   Small tanks, long operation time, little damages by extinguishing water

LOW CONSUMPTION OF FOAMING AGENT   |  Small tanks, long operating time, less contaminated extinguishing water

BIODEGRADABLE   |   Environmentally friendly, no risk to health

SYSTEM TECHNOLOGY

In the patented One Seven® process the One Seven® foaming agent is added to water depending on the volume flow. This mixture is foamed with compressed air in One Seven® compact foam generators. The foam is always produced under the same conditions as the flow rate, the foam concentrate quantity and the volume of compressed air are automatically controlled by the One Seven® system. The result is One Seven® compressed air foam which is characterized by its homogeneous consistency and constant, reproducible quality.

In the One Seven® process seven parts of foam are produced from one part of water. This increases the effective surface of the extinguishing agent significantly. Due to the honeycomb structure of the One Seven® foam there are no gaps with unbound water between the foam bubbles. These two special features are clear advantages for particularly fast and efficient fire fighting.

The production of One Seven® compressed air foam consumes considerably less water than other extinguishing processes. This means that the water supply can be made smaller or the operating times with conventional tanks can be extended. Due to the low water consumption damages caused by extinguishing water are reduced and less contaminated extinguishing water has to be disposed.

HISTORY OF CAF

The first foam extinguishers were developed at the end of the 19th century. By adding organic substances to the extinguishing water a floatable extinguishing agent was created that did not roll off smooth surfaces so quickly. These precursors of modern extinguishing foam already separated the burning material from the oxygen and cooled the material surface at the same time.

From the 1920s compressed air was used to achieve the necessary foaming in the mixture of water and foaming agent. Over the next few decade, compressed air foam became the preferred method for firefighting, especially in the USA. The spectrum of applications ranged from liquid fires and forest fires to building fires.

In Europe compressed air foam took a little longer to establish itself as an extinguishing agent. It was not until the mid-1990s that compressed air foam systems became rapidly popular in mobile and stationary firefighting for all kinds of fires.

Since 1995 One Seven has specialize din the development and production of compressed air foam systems and the special One Seven® extinguishing foam – making One Seven one of the companies with the longest experience in this segment of fire fighting in Germany.

Portabel firefighting syringe 1938