DIPPER VALVE.DIPPER VALVE is a specialty valve manufacturer founded in Zigong, Sichuan in 2001. It serves as a key contractor for the National Energy Administration’s “Localization of Key Equipment for Oil and Gas Pipelines” project and is a leading supplier of critical valves for national strategic oil and gas pipelines, major chemical plants, and world-class hydropower stations. The company specializes in the R&D and manufacturing of valves designed for extreme operating conditions and specialized functions, with a strong emphasis on independent innovation. It holds 43 national patents, including 16 invention patents. The company holds a comprehensive range of certifications, including TS, API 6D, API 6FA, ISO series, and SIL3, among other authoritative domestic and international certifications. Thanks to its technical strengths, its flagship products—such as axial check valves, rail-guided forced-seal valves, compressor anti-surge valves, pigging valves, and water hammer relief valves—lead the domestic industry in terms of technical sophistication, manufacturing capabilities, and application track record.