Shanghai Valve Factory Co., Ltd.: This is an old valve manufacturer founded in 1921. It specializes in the production of various types of high and medium pressure valves. It has a complete product variety, guaranteed quality, and good reputation. It is widely used in petroleum, Chemical industry, boilers, power stations, metallurgy, clean energy, scientific research and other fields1. The company is the deputy director unit of the Valve Branch of the China General Machinery Industry Association, the deputy director unit of the Safety Pressure Relief Device Standardization Committee of the National Standardization Committee, and a member of the Valve and Pipeline Professional Committee of the Fluid Engineering Branch of the Chinese Mechanical Engineering Society1. The company has been rated as a national high-tech enterprise for many consecutive years, and its Shangva brand products have been recognized as "Shanghai Famous Trademarks" and rated as "Shanghai Enterprise Technology Center".

Shanghai Jingdie Valve Co., Ltd.: This is a valve manufacturer specializing in the production of butterfly valves. Its products include centerline butterfly valves, eccentric butterfly valves, triple eccentric butterfly valves, double eccentric butterfly valves, etc., suitable for water conservancy, electric power, petroleum, chemical industry , metallurgy and other industries 2. The company has advanced production equipment and testing equipment, and has passed ISO9001 quality management system certification and CE certification2. The company's products sell well at home and abroad and are well received by customers.

Shanghai Keke Valve Group Co., Ltd.: This is a comprehensive valve manufacturer integrating R&D, production, sales and service. Its main products include gate valves, globe valves, ball valves, butterfly valves, check valves, Regulating valves, etc., materials include cast steel, cast iron, stainless steel, etc. 3. The company has a number of national patented technologies and has passed ISO9001 quality management system certification and API certification3. The company's products are widely used in petrochemical, electric power, metallurgy, construction and other industries, and exported to Southeast Asia, the Middle East and other countries and regions.

The above are some of the more famous valve manufacturers in Shanghai that I recommend for you. I hope it will be helpful to you.