Zhengyuan Valve Group Co., Ltd. applies lapping and polishing to refine valve sealing surfaces. The lapping process follows a coarse-to-fine sequence: rough lapping removes defects, medium lapping improves finish, and fine lapping achieves smooth sealing faces. Different abrasives are selected based on surface finish requirements. Hard alloy balls undergo polishing to remove scratches and achieve high surface quality.

  The company operates machining centers, CNC equipment, and testing facilities to support precision finishing. Through systematic control of lapping and polishing, Zhengyuan provides reliable sealing performance for valves used in petrochemical and power applications.