Three Way Ball Valve (YD230T YD320L) YD230T/230L Three Way Ball Valve 1. This YD230T/230L Three Way Ball Valve is used to switch over mix and divide the flow of corrosive or noncorrosive liquid gas or powdery mediums. 2. Upon opening and closing the smooth flow channel effects less pressure loss making operation quite labor saving and maintenancefairly easy. 3. The five types of flow direction to meet different technological requirements.