Zhengzhou City ZhengDie Valve Co., Ltd (ZD) is a science and technology innovation
enterprise, hi-tech enterprise in Henan Province, and a specialized manufacturer that researches
and manufactures middle and low pressure butterfl y valve and special valves. ZD is member of
China Water Association, China Valve Association and China Quality Association. And is also
National Patent Demonstration Enterprise. ZD has been approved by ISO 9001 Quality System
Authentication in 1997, and passed national ����grade security registration. Now we have DNVISO
9001 Certificate, CE Certificate and API Certificate. The ��D��Brand products have been
awarded many national patents, in which the metal seated butterfl y valve is awarded the Henan
famous brand products and recommended as ��ine Goods��by China Water Association and
China National Petrochemical Corporation.
With the rich technical and engineering team, fi ne machining tools, and testing equipments,
large input in technology innovation prompts ZD��products improved constantly. Strict quality
control system ensures the high quality products that make ZD keep leading in the Valve industry
of China.