Established in 2003 in Wenzhou, Zhejiang, NSUN specializes in valve manufacturing, offering a comprehensive range of high-, medium-, and low-pressure valves. Its core product lineup includes gate valves, globe valves, check valves, ball valves, butterfly valves, threaded valves and fittings, as well as non-standard customized valves. Designed and manufactured in compliance with GB, API, ANSI, JIS, and BS standards, NSUN products utilize diverse materials such as carbon steel, stainless steel, low-temperature steel, alloy steel, and heat-resistant steel. Available actuation methods cover manual, worm gear, pneumatic, hydraulic, and electric operations. With the ISO9001 quality management system fully implemented, NSUN valves are widely applied across critical sectors including oil & gas, chemicals, power generation, metallurgy, pharmaceuticals, food processing, and water treatment.