... 0,1.6,2.5,4.0 Material:stainless steel Connection:flange,thread etc. Electric Cremic ball valve1.DN:40-400MM ... of metal materials and scarce mineral resources. Wear-resistant ceramic valves are mainly used in electric power, petroleum, chemical, metallurgy, ... its cost performance is far better than other comparable metal valves. With the continuous development of science and technology and progress of ...