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.