Update: CHANGING A FIREDOS PROPORTIONER OVER TO FLUORINE-FREE FOAM AGENTS

We are still receiving a large number of enquiries about how to proceed with regard to FireDos proportioners in case of changing over from a foam agent containing fluorine to a fluorine-free foam agent. Due to recent developments we have amended our set of guidelines.

Is it sufficient to clean the proportioner, or do any components have to be replaced? We have interviewed several experts in the field of chemistry/foam agents regarding this matter resulting in differing opinions. As a result, we have erred on the following approach.

Any parts in the proportioner, including suction line and return line, can be considered to be fluorine-free only after the following work steps have been carried out as a minimum. Fluorine-free means that the remaining contamination falls below certain thresholds.

Some fluorine-free foam agents are far more viscous than the previously used AFFF or AFFF-AR foam agents. When changing over, it is therefore a must to review the calculation/dimensioning of foam agent tank and suction line in order to further guarantee precise and reliable proportioning. We will be happy to assist you in this issue, too.