Some provinces in China and some prefecture-level cities require underground garages, including charging piles, to use foam-to-water spray systems. At present, the market basically uses a burst-type pressure proportional mixing device, and also uses a balanced remote injection (including a burst-type and a pump type), but the overall system is more complex.

The F+W mechanical pump-in proportional mixer is used in the underground garage foam-water spray system by remote injection. The whole system is very simple and greatly reduces the overall cost of the foam-water spray system.

The flow range of F+W XD6-3 is 180-480OL/min, which can fully meet the requirements of the minimum flow of the system, even when there is a certain imbalance in the double-circuit water supply and the two circuits, it can also meet the minimum flow requirements.