A magnetic inductive water flow meter measures the quantity of water discharged. The proportioning rate is set by the operator. This can be done in steps or steples.
A magnetic inductive foam compound flow meter measures the amount of foam discharged; the electronics then calculate the amount of foam compound which needs to be added. Afterwards, proportioning ball valves in the connecting line from discharge side and suction side are controlled accordingly. The electronics constantly control the ball valve, to ensure the correct proportioning rate.
The drive water that flows from the normal pressure side to the suction side produces the vacuum for foam compound suction. The foam compound is mixed on the suction side of the water pump.
Both the water flow as well as the foam compound flow can be displayed on request.