Zhengzhou City Zhengdie Valve Co., Ltd. (ZD Valve) is a high-tech enterprise in Henan Province. Our company specializes in the research and manufacture of middle and low pressure butterfly valves and special valves. Our company is a member of China Water Association, China Valve Association, China Quality Association as well as National Patent Demonstration Enterprise. Our company attained ISO9001 Quality System Certification in 1997, and has attained DNV certification, CE certification and API certification. "ZD" brand products have attained many national patents. Our metal seated butterfly valve is awarded as "The Henan Famous Brand Product" and recommended as "Fine Goods" by China Water Association and China National Petrochemical Corporation.With a technical and engineering team, fine machining tools, and advanced testing equipment, our products are improved constantly. Strict quality control systems ensure the high quality products.Our main products are double eccentric metal/rubber seated butterfly valves, triple offset butterfly valves, tilting disc check valves, centerline butterfly valves, ebonite butterfly valves, eccentric plug/ball valves, gate valves, globes and power station valves, with sizes ranging from DN40mm (2") to DN4000mm (160") and PN ranging from 0.01MPa to 6.4MPa. Our valves are widely used in the fields of water supply, metallurgy, electric power, petrochemical and municipal construction.To make ZD famous is our pursuing aim and to make client satisfied is our eternal theme. Under the enterprise spirit of "practical, professional, honest, devoted", ZD people will keep up with the times and bring forth new ideas.We start the second undertaking by taking over Henan Kaifeng High Pressure Valve Co., Ltd. (the former is Henan Kaifeng High Pressure Valve Factory), and acquire the complementary advantages through strong-strong combination. Besides, ZD became a public company in 2007, which brought more opportunities and challenges to show ourselves to the world.