Zhejiang Dewei Valve Company is a commitment to develop high-precision, high-tech, multi-performance ball valve manufacturer. In order to improve the accuracy of product processing, the accuracy of the operation and the roundness of the sphere, we introduce the German Siemens CNC equipment - spherical grinding machines, machining centers, as well as spherical roundness measuring instrument to solve a large-scale pipeline ball valves, slow turn-on time torque, matching drives the high cost of the main problems.