Shanghai Lianggong Valve Factory Co., Ltd. was founded in 1946 and is located in Yanghang Industrial Park, Baoshan District, Shanghai. With over 80 years of history and rich experience in the design and manufacture of various valves and valve actuators, Lianggong possesses strong professional technical strength in valve design and production. The company enjoys a good reputation and high recognition in both domestic and international markets.

Lianggong's main products include globe valves, gate valves, check valves, cryogenic valves, power station valves, flat valves, discharge valves, slurry valves, butterfly valves, ball valves, non-standard valves, nuclear safety-grade valves, military valves, electric actuators, and other series of products. These products are widely used in industries such as petroleum, petrochemical, thermal power, nuclear power, metallurgy, chemicals, new energy, and water systems. All Lianggong products strictly comply with international and national standards, including GB, JB, HG, SH, GJB, ISO, API, ASME, RCCM, ASTM, MSS, ANSI, NACE, JIS, and others.

Shanghai Lianggong is one of the earliest Chinese enterprises engaged in the R&D and manufacturing of nuclear power valves. The company has obtained the "Civil Nuclear Safety Equipment Design License" and "Civil Nuclear Safety Equipment Manufacturing License" issued by the National Nuclear Safety Administration of China, covering nuclear safety levels 1, 2, and 3 valves.

Since 1974, Lianggong has been involved in the development of nuclear power valve prototypes and has continuously participated in the development of China's nuclear power industry. The company has supplied high-quality nuclear-grade and non-nuclear-grade valves to numerous domestic and international nuclear power projects, including Qinshan, Pakistan, Daya Bay, Tianwan, Ling Ao Phase II, Yangjiang Nuclear Power Plant, Taishan Nuclear Power Plant, Fujian Fuqing Nuclear Power Plant, Fangjiashan Nuclear Power Plant, and others. These products have received high praise from the nuclear power industry.