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Foam extinguishers cartridge operated BS-series PREMIUM LINE - Frost proof

Si6BF, Si9BF - Frost protected down to -30 °C

Brass valve and safety device for the highest demands on quality and safety

The DÖKA cartridge operated fire extinguishers of the BS series are equipped with a high-quality push button valve and cap nut made of nickel-plated brass. In addition to the standard, the BS series is also equipped with an additional pressure relief valve with a brass body, which protects the cylinder from excess pressure. The generous dimensioning of the safety device and strike button enables the fire extinguisher to be operated with gloves. The ergonomic handle with finger recesses and slip protection offers excellent carrying comfort. The rotating extinguishing pistol enables optimal control of the extinguishing agent jet and the operation of the fire extinguisher with just one hand.

The DÖKA BS series is the highest quality equipment variant of our rechargeable fire extinguishers. High-quality materials, the ergonomic design and the extensive selection of different types of fire extinguishers. We offer frost-proof wet and grease fire extinguishing agents as well as special extinguishing devices exclusively in the BS series. The PREMIUM LINE for the highest demands on quality, reliability and safety.

The DÖKA cartridge operated foam fire extinguishers of the BS-series with internal propellant cartridge. The fire extinguisher is only put under operating pressure after pulling the securing and depressing the push button when it is in use. This ensures a high level of operational reliability, saves material and minimizes maintenance costs.

Frost protected foam

The fire extinguishing agent foam is created from a water / foam agent mixture by adding air. In the case of fires involving solid substances (fire class A), the high network effect combined with the interruption of gas exchange and the cooling effect result in the excellent extinguishing properties.

Foam extinguishing agents work by covering the entire surface of flammable liquids with a vapor-tight foam blanket, which prevents the access of oxygen (sticking effect) and cools the surface (cooling effect).


Fire class A, combustible solid materials
such as wood, car tires, textiles

Fire class B, flammable liquids
such as alcohols, petrol, paint, oil

Electrical systems
Up to 1.000 V, minimum distance 1 meter

Areas of application
Indoor and outdoor areas with special requirements on the frost resistance of the foam compound, such as cold rooms, sensitive machines in the outdoor area, mobile homes

Technical data


Capacity: 6 ltr. foam
Rating: 34A / 144B
Dimensions H x W x D ca. mm: 560 x 235 x 170
Weight ca. kg: 10,7
Throw range ca. m: 4-6
Discharge time ca. Sek.: 49
Operating temp. °C: -30 to +60

Environmental info

Extinguishing agents contain perfluorinated and polyfluorinated substances (PFAS).

We have compiled further information on this topic on our info page:

Fluorine free fire extinguishers


DÖKA foam fire extinguisher Si6BF
  • High extinguishing performance
  • Push button valve with brass body and safety valve
  • Ergonomic handle
  • Frost-proof foam extinguishing agent
  • Cylinder with polyester resin coating
  • Turnable pistol
  • Foot ring with hose adapter to protect the bottom of the cylinder
  • Bilingual operating screen German / English

Quality features

Push button valve made of brass - only in the BS series

The body of the push button valve is made of nickel-plated brass. All other components such as hose, riser pipe, blow pipe and propellant gas cartridge are mounted on the base body. Nickel-plated brass is significantly more resistant to extinguishing media and environmental influences and therefore more durable than plastic fittings. For this reason we only offer certain device versions in the BS series, such as frost-proof water and foam extinguishers. We also offer fire extinguishers with MED approval, i.e. for use on ships, only in the BS series.