ShuangDa Valve manufacturing company (SDV) is located in Sanqiao ind. Zone, Wenzhou city, Zhejiang Province, China, which was established in 1992. Now it has developed into a stock sharing enterprise. It owns land of 27000ŠO, 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 a..