Trockenpulverlöschern

Trockenpulverlöschern, also known as dry powder extinguishers, are fire suppression devices that use a fine, dry chemical powder to interrupt the chemical reaction in a fire. The powder is typically a mixture of potassium bicarbonate, sodium bicarbonate or sodium bicarbonate with additives that improve its properties. When discharged, the powder forms a blanket over the flame, displacing oxygen and cooling the fuel, effectively putting out the fire.

These extinguishers are classified into three main classes according to the International Classification of Fire Extinguishers: class A (ordinary combustibles), class B (flammable liquids and gases), and class C (electrical equipment). Because of their versatility, Trockenpulverlöschern are often rated for multi‑class usage (e.g., ABC). They are preferred in environments where electrical or combustible liquids are present, such as workshops, warehouses, and on vehicles.

A key advantage of dry powder systems is their quick response and effectiveness even when the fire has fully engulfed the fuel source. They are relatively low maintenance and can be stored for long periods without degradation. However, the powder residue can be corrosive to sensitive equipment, especially electronics, and cleaning afterwards can be laborious. The powder can also create temporary visibility hazards in enclosed spaces.

Regulatory standards such as the IEC 60079 series for explosive atmospheres and national fire safety codes dictate the minimum requirements for capacity, placement, and maintenance of Trockenpulverlöschern. Operators are typically required to receive training on proper use and disposal of extinguishing agents. When selecting a dry powder extinguisher, factors such as fire class coverage, chamber capacity and the specific hazards present in the environment should be considered to ensure adequate protection.