First grade equipment means the possibility of First Level products, now OUYI have advanced moving and bench-top CMM(Three-coordinate measuring machine), as to producing equipment, OUYI VALVE customized a 64" ball machining & grinding integrative machine from Italy. Its machining range covered 16" ~ 64", ball roundness＜0.02mm, the coaxial =0.02mm, roughness = Ra0.4um. which is the biggest ball CNC in China, with dozens CNC, vertical, horizontal lathe & machining center, such strong hardware and strictly quality control system means OUYI can provide high precision & exchangeable products for all domestic & overseas customer, especially to meet the market request for big size balls over 48” size.