Class D Fires are combustible metal fires. Magnesium and Titanium are the most common types of metal fires. Dry powder agents work by smothering and heat absorption.
Dry Chemical Powder Cartridge Type
|Type||Gas Cartridge Type|
|Working Temperature||-30◦C to + 55◦ C|
|Cylinder Testing Pressure||@ 35 bar for 30 sec.|
|Service Pressure||19 bar max.|
|Min. Effective Discharges Time||8 sec. min.|
|Bulk Range||2 mtr. Min.|
|Propellant||CO2, Stored in Gas Cartridge (180gms)|
|Gross Weight||17 kg approx.|
|Charge||Dry Chemical Powder (TEC)|
Dry Powder extinguishers are similar to dry chemical except that they extinguish the fire by separating the fuel from the oxygen element or by removing the heat element of the fire triangle. However, dry powder extinguishers are for Class D or combustible metal fires, only.