Installed at the outlet of the fan coil at the end of the central air conditioner, used to control the switch or adjustment of the chilledwater of the central air conditioner. The straight-through structure has the advantages of low resistance and noslagging.

The electric three-way ball valve is used in heat pump air conditioners to switch between cold and hot water. One side is used for system refrigeration, and the other side is used for domestic hot water.