Shang Valve Factory Co., Ltd. has nuclear grade products such as gate valves, globe valves, and check valves, and has established a systematic production and quality management system for nuclear valves. It is one of the main suppliers of nuclear valves in China. We have successfully developed the safety valves for the voltage regulator and main steam of a million kilowatt nuclear power unit, and delivered the safety valves for the K2/K3 voltage regulator and main steam.