Founded in 2008 and located in Fuzhou, Fujian, DUER specializes in the R&D and manufacturing of precision valves. The company occupies 33,000 m² of facility space and employs over 230 staff, including 22 senior and intermediate engineers. It is equipped with five-axis simultaneous machining centers, GTAW welding, and surface treatment production lines, with full-chain R&D and manufacturing capabilities for valves and fittings used in ultra-high vacuum and clean systems. Its products are applied in strategic industries such as biopharmaceuticals, food and beverage, new energy, semiconductors, solar energy, military, and aerospace. Its main product lines include vacuum valves, vacuum fittings, sanitary valves and fittings, and flanges, providing high-cleanliness, ultra-high vacuum precision control solutions.