1971: Established as Hai’an County Dengzhuang Valve Factory
1996: Responding to the call of reform and opening up, renamed as Nantong Mingjiang Valve Factory after the reform of property rights
1998: the chlor-alkali products won the Jiangsu Golden Bull Award of excellent valve; through equity transfer, the company changed from the collective enterprises to a stock cooperative enterprises
1999: Through national implementation of quality consciousness, the company passed the quality system certification.
2000: fluorine plastic lined valves won the Chinese Patent New Technologies Award, new products Expo Golden Award and Special Golden Award.
2002: “Mingjiang” chlor-alkali special valves was awarded Nantong Famous Brand
2005: The company renamed as Jiangsu Mingjiang Valve Co. Ltd. and passed the environmental system certification and health&safety system certification
2006: The company inject foreign investment with foreign managers and technical staff, purchase advanced production and testing equipments and invest to build a new Mingjiang Industrial Park
2007: The company and Changzhou University (Jiangsu Polytechnic University) co-founded “Chlor-alkali Special Valves Engineering Technology Research Center ”
2008: The company was awarded the title of high-tech enterprises of Jiangsu Province and was named as “ Quality Trustworthy Enterprise of Jiangsu Province”
2009: “ Mingjiang” valves won the title of quality products of Jiangsu Province
2010: The company launched a listed company, began the assets reorganization, and purchased the Nantong Yonghong Casting Co. Ltd.; The company was awarded as China AAA grade quality&trustworthy enterprise, named China's top ten best-selling brand products of chemical valves; The joint three ministries granted the company as one of the Top Ten Jiangsu star enterprises; The company join in as a member of China General Machinery Association and China chlor-Alkali Industry Association;
2011: The company passed the reexamination of high-tech enterprises and the reexamination of ISO9001, ISO14001, OHSAD18001 system certification; The company won famous brand of Jiangsu Province; Chlorine bellows sealed globe valve won the National Torch Program project certificate.
2012: The company build strategic partnerships with Suzhou Peng Han Machinery Co. Ltd. and started strategic partnership with CITIC Bank ; joined the list of Nantong listed companies; joined as member unit of Hai’an Intellectual Property Protection Association; awarded the top hundred enterprises of Hai’an County