Shanghai TangCheng Petrochemical Technology Co. Ltd is a comprehensive company engaged in the design,Website:http://www.valves-manufacturers.com, research, production and marketing of valves.We specialize in manufacturing various valves, including ball valves, check valves, gate valves and globe valves, which are widely used in petroleum, chemical industry, metallurgy, energy and other related fields. Our factory is located in Oubei Wenzhou, the hometown of pump and valve in China, taking a land area of 30,000 square meters and a construction area of 38,000 square meters.And we have a professional ball machining workshop,where can make all kinds of precision balls,including top entry,metal seat and V type balls. Ball valves,Gate Valve,Global Valves,Check Valves,Butterfly Valves Oil&gas,chemical industry,power station,water treatment,mining industry,shipbuilding industry,general industry system and etc. ISO 9001,CE,API 6D,API 607,DNV and etc. CNC equipment,CNC vertical lathe,testing equipment,welding equipment and etc.