Patent ID: 8573317

Claim:
A method for continuously producing compressed-gas foam for fire-fighting or for decontamining by supplying both compressed gas and a mixture of liquid and at least a foam agent to a foaming chamber having an outlet for outputting foam, comprising the steps of: continuously supplying the mixture of foam agent and liquid to the foaming chamber at a first constant pressure and at a first constant volume flow rate; continuously supplying the compressed gas to the foaming chamber at a second constant pressure and at a second constant volume flow rate; and regulating, in an open-loop control, the foam pressure at the outlet of the foaming chamber for maintaining the foam mixing pressure in the foaming chamber constant by applying a target gas pressure to a self-operating valve connected to the outlet of the foaming chamber, wherein the self-operating valve is adapted to regulate the foam pressure at the outlet of the foaming chamber so as to equal the target gas pressure.