ShuangDa Valve Co.,LTD. specializes in research, development and manufacturing of all kinds of valves, It owns land of 27000 and over 300 hundred employees, SDV has taken the newly valve manufacturing technology for standards API, DIN, BS, JIS, GB valves. Products include gate / globe /check /butterfly / ball valve and three-way and four-way quadruple sealing ball valves around 2000 kinds valves with different specifications. The company owns three workshops such as hot forging, welding, hot treatment, machining and assembly; one production and research centers for hydraulic control valves, globe valves, butterfly valves, electric power station valves, API valves and special valves; machines and equipments such as CNC, numerical control lathe, plasma welding, automatic shield welding, ultra-high frequent vacuum heat treatment, NC lathe for ball processing, special machining devices for valves, automatic painting line and so on. valve performance test center, chemical analysis room, hardness &strength tester, imported spectrum analyzer, thickness and so on. valve performance test center, chemical analysis room, hardness &strength tester, imported spectrum analyzer, thickness measurer, carbon &sulfur meter, colorimeter, X & x-ray detector, etc.