... ball valve is simple structure, small volume, light weight, small flow resistance, good effect in energy saving. fluid into or out of ... resistant High temperature resistantApplications rang:it is widely used in petroleum,chemical,steek and iron,electrical power,shipbuilding,pharmacy ... , SO, SW, TH(STF), BL, PL, and LJ. In addition we can manufacturenonstandard flanges according to customers drawing and ...