ZHONGZI VALVE.Founded in 1935 and headquartered in Shanghai, ZHONGZI VALVE is a seasoned valve manufacturer with over 80 years of history. The company currently employs 378 staff members, including 82 technical personnel, and is equipped with a valve design center, a machining center, and comprehensive testing facilities. Its extensive product portfolio encompasses two main categories: standard industrial valves and high-precision vacuum valves. Conventional valves are available with manual, electric, or pneumatic actuation, with nominal diameters ranging from 6 mm to 4,000 mm and operating pressures from 0.1 to 32 MPa. Materials include copper, cast iron, carbon steel, and stainless steel, and these valves are widely used in the petrochemical, power generation, urban gas, and construction industries. The company’s vacuum valves feature leading-edge technology with leak rates as low as 1.3×10⁻⁷ Pa·L/s, serving high-precision fields such as aerospace, electronics, pharmaceuticals, and scientific research. The company has obtained multiple authoritative certifications, including ISO 9001, National Pressure Vessel (AZ), and Special Equipment (TS), and possesses a deep foundation of technical expertise.