Zhejiang Demelong Fluid Technology Co., Ltd. is a valve manufacturer based in Yongjia, Wenzhou, with over 18 years of experience in plug valve manufacturing and related fluid control products. Our manufacturing covers different valve structures, sealing arrangements and material combinations, including stainless steel grades such as 304, 316, 904 and duplex 2205 and 2507.
Our product range includes sleeve type, lubricated, metal seated, eccentric and double block and bleed plug valves, with product configurations developed for different pipeline specifications and operating conditions.
Production Facility & Equipment
Our factory covers the main production stages for plug valves, including component processing, machining, grinding, assembly, testing and finished-product preparation. The production facility is equipped with CNC machine tools, vertical lathes, grinding machines and machining centers to support different valve structures and specifications.
Certifications & Quality Management
Demelong holds API and CE certifications for applicable products and maintains an ISO 9001 quality management system.
Packaging and Transportation Materials
