Zhengzhou City ZhengDie Valve Co., Ltd (ZD) is a science and technology innovationenterprise, hi-tech enterprise in Henan Province, and a specialized manufacturer that researchesand manufactures middle and low pressure butterfl y valve and special valves. ZD is member ofChina Water Association, China Valve Association and China Quality Association. And is alsoNational Patent Demonstration Enterprise. ZD has been approved by ISO 9001 Quality SystemAuthentication in 1997, and passed national âAâ grade security registration. Now we have DNVISO9001 Certificate, CE Certificate and API Certificate. The âZDâ Brand products have beenawarded many national patents, in which the metal seated butterfl y valve is awarded the Henanfamous brand products and recommended as âFine Goodsâ by China Water Association andChina National Petrochemical Corporation.With the rich technical and engineering team, fi ne machining tools, and testing equipments,large input in technology innovation prompts ZDâ products improved constantly. Strict qualitycontrol system ensures the high quality products that make ZD keep leading in the Valve industryof China.
