Class D Stored Pressure Dry Powder ExtinguisherThe Amerex “soft flow” extension applicator is particularly suited for fighting Class D fires. It keeps the operator’s hands away from the extreme heat and prevents inhalation of toxic fumes caused by burning material.  Metal fires involving magnesium, sodium, potassium and sodium-potassium alloys can be successfully extinguished with this extinguisher.MODEL B570 contains a special blended Sodium Chloride based dry powder extinguishing agent. Heat from the fire causes it to cake and form a crust excluding air and dissipating heat from burning metal. Metal fires involving magnesium, sodium, potassium and sodium-potassium alloys can be successfully extinguished with this extinguisher. There is data showing that zirconium, uranium, titanium, and powdered aluminum fires can be controlled and extinguished with this unique extinguisher.