1 Langao Valve (founded in 1966, a national high-tech enterprise, a well-known trademark in China, a famous trademark in Gansu Province, a famous brand in Gansu Province, one of the top ten valve brands, Lanzhou High Pressure Valve Co., Ltd.)

2 Jiangyi (national high-tech enterprise, well-known trademark in China, famous trademark in Zhejiang Province, famous brand product in Zhejiang Province, one of the key enterprises in China's valve industry, Jiangnan Valve Co., Ltd.)

3 Angstrom Meike (China's well-known trademark, one of the largest copper valve production and export bases in China, famous trademark in Zhejiang Province, Zhejiang famous brand, Ningbo Aimeike Group Co., Ltd.)

4 Upper Valve SF (China General Machinery Vice Chairman Unit of the Valve Branch of the Association, one of the key enterprises in the national valve industry, one of the top ten valve brands in China, Shanghai Valve Factory Co., Ltd.)

5 Lipai (China Famous Trademark, Tianjin Famous Trademark, Export inspection-free, a group company integrating scientific research, production, sales, storage and transportation, import and export operations, Tianjin Dazhan Group Co., Ltd.)

6 Open valve (founded in 1959, a high-tech enterprise, famous in Henan Province Trademark, Vice Chairman Unit of China General Machinery Association, large backbone enterprise, Henan Kaifeng High Pressure Valve Co., Ltd.)

7 Gongpai (founded in 1946, Shanghai famous trademark, Shanghai famous brand, industry influential brand, Professional manufacturer of valves and valve electric devices, Shanghai Lianggong Valve Factory Co., Ltd.)

8 Jingpai (famous trademark in Beijing, a key state-owned enterprise manufacturing high and medium pressure valves and steam traps, China Top 500 machinery companies, Beijing Valve General Factory Group Co., Ltd.)

9 Dagao (founded in 1956, a well-known trademark in China, a national high-tech enterprise, and a supporting unit for the localization of key valves for national key equipment , Dalian Dagao Valve Co., Ltd.)

10 Feiqiu (founded in 1958, one of the largest valve manufacturing enterprises in China, a high-tech enterprise, a famous trademark in Sichuan Province, a famous Sichuan brand, Zigong high-pressure valve Co., Ltd.