Zoomlion Delivery /Material Cylinder Cylinder DN200 DN230 DN260

1.Durable cylinder is made of high quality carbon steel  Hardness >HRC64

2.Use advanced chromium plating process for inner wall, 0.26-0.33 mm super-thick chromium plating layer

3.Unique structure design on both ends of the flange, sharply increased the assembly precision  and strength of the concrete cylinder key stress cross section structure