We are Shanghai Sanwei Valve Manufacturing Co.Ltd, whose headquarter is located in Songjiang Industrial Park of Shanghai in China, covers 65,000 square meters. There is a controlling and studying center of fluid, an inspection center of product quality and a consulting center of techinical service, having strong designing, developing and producing ability. All products will be accomplished strictly conforming to the quality and management system ISO9001, either in the process from initial designing to output or producing process of complete products. The products are made ocnforming to GB, JB, ISO, API, ANSI, BS, DIN, NF, JIS, and JIP standard, covering over twenty kinds such as gate valve, parallel gate valves, butterfly valves, globe valve, ball valves, check valves, control valves, and power station valves with hi-pressure and hi-temperature. Nominal diameter: 1/4"~80"(DN6~2000MM), Pressure rating: 150lb~2500lb (0.1pa~42.0mpa), Working termperature: -196?~680?, Body material: carbon steel, alloy steel, stainless steel, stainless steel, Ti material with lowest carbon, Monel, No.20 alloy and smelting and producing if special requirements according to the customers. Our products are applicable to petroleum, natual gas chmical industry, power, metallurgy, pharmacy and so on. And we gain good comments and reliability from all fields for excellent quality.