Can a fire extinguisher freeze

Why foam extinguishers?

Foam extinguishers have two important advantages over the widely used powder extinguishers:

1. You work with a lower operating pressure and apply the extinguishing agent with a soft spray jet. This means that every layperson who can handle a garden hose is able to spray the extinguishing agent with such a foam extinguisher without any problems.
Powder extinguishers, on the other hand, work with 15 bar operating pressure so that the solid powder can be ejected. The principle is more reminiscent of a rocket drive than a garden hose.
And with that, the layman who is not prepared for it is usually completely overwhelmed.
In addition, foam extinguishers take longer to spray, simply because not so much extinguishing agent escapes at once.

2. The extinguishing agent damage becomes enormous with powder, as the huge dust cloud from extinguishing salts spreads far beyond the source of the fire. The extinguishing agent powder has a highly corrosive effect in connection with the air humidity. With foam extinguishers, on the other hand, the extinguishing agent damage is very little, depending on the foam agent, even negligible. It is only wet where it is sprayed.

Which foam extinguishers?

Since there are different foam extinguishers, you have to know which differences are important:

1. Durability of the foam concentrate, which causes follow-up costs.

Devices with six or nine liters of finished mixture (premix) last between 2 and 6 years.
The exchange of extinguishing agent costs e.g. with a GLORIA SI 9 NI + almost 70 EUR every 6 years!

Devices with foam concentrate in a separate cartridge usually last 8-10 years.
The exchange of extinguishing agent costs e.g. with a GLORIA SK 9 PRO every 8-10 years under 20 EUR! A cheap foam extinguisher can quickly become a little cheaper. Do the math yourself!

Our tip: ask when purchasing a new one always according to the shelf life of the extinguishing agent and the resulting costs!

2. Extinguishing agent damage from different foaming agents

Foam concentrates are now available in two versions:

1. Foam concentrate as ammonium phosphate solution. These solutions are practically nothing more than liquid extinguishing powder. The corrosive effect of the extinguishing powder is increased because the "moisture" is supplied with it.

2. Foam concentrate as so-called light water (AFFF) based on fluorinated surfactants, i.e. in principle soaping agents. These can be removed quickly and cleanly with a damp cloth.

The devices with GLORIA SKK technology combine both advantages in one device:

Foam concentrate Light-Water as a concentrate in a separate piston cartridge, which guarantees a long shelf life and 100% mixing.

Limits of foam extinguishers?

The extinguishing agent can freeze in areas at risk of frost (below 0 ° C). Either frost-proof foam extinguishers, which are quite expensive, or powder extinguishers can be used there.

Fire class C, i.e. gas fires, cannot be extinguished. That is only possible with powder. In the event of a gas fire, however, it is advisable to simply turn off the gas anyway. If the flame is extinguished, but the gas continues to flow out, there is an immediate risk of explosion!