Zhengzhou U DA trade Co., LTD is specialized in development and production of various kind of rubber, metal, nonmetal, steam, water, air, piping valve, compensator, etc, is an outstanding production units welcomed by the water system.My company has decades of production history, strong technical force, advanced equipment, excellent staff, well-trained professional duties, and design institute, institute for scientific research, technical development, continuous agencies product unique design, novel structure is reasonable.The main business scope includes: rubber joint , expansion joint and rubber blowdown check valve etc series products.