What is the purpose of using PKP alongside AFFF?

The purpose of using PKP (Purple-K Powder) alongside AFFF (Aqueous Film Forming Foam) is primarily to suppress flammable liquids. PKP is a dry chemical agent that interrupts the combustion process of flammable liquids, making it particularly effective for fires involving hydrocarbons and other flammable liquids. When used in conjunction with AFFF, which is designed to create a foam blanket that prevents oxygen from reaching the fuel, PKP adds an additional layer of fire suppression by chemically interrupting the fire’s reaction.

This combination is advantageous because while AFFF provides cooling and prevents re-ignition through its foam blanket, PKP contributes its effectiveness in quickly suppressing flames from flammable liquid spills. By utilizing both agents, firefighting teams can significantly enhance the overall effectiveness of their response to such fires, ensuring a more comprehensive approach to fire suppression.