Foam Proportioner

"A foam generator greatly extends the capability of the slip-on unit. A blanket of foam can quickly smother a pile of smoldering snags that otherwise resists being extinguished. The foam proportioner introduces foam concentrate, which is stored in a built-in 12 gallon tank, into the water stream, downstream from the pump and re-circulation valve. This prevents foam concentrate from entering the water tank or the pump. This is an advantage in situations where the tank, pump, and valves are not cleaned in a timely manner after being used and corrosion by foam chemicals is a matter of concern.
A metering valve or proportioner adjusts the concentration of foam concentrate in the water stream from 0.01% to 1%, producing "wet" "foam or "dry" foam."

http://www.precision.rotor.com/trialpgs/module.shtml

"Međumješalica KOLIBRI JET je projektirana za rad sa svim vrstama pjenila i uređajima za stvaranje pjene. Ugrađeni regulator omogućava trenutnu promjenu odnosa mješanja pjenila i vode od 2, 3, 4, 5 i 6%."

http://www.bmd-optima.com/index2.php?akcija=oprema&broj=24