DONGYI.DONGYI Company, established in Wenzhou, Zhejiang in December 2006, is a modern enterprise specializing in the R&D, production, and sales of compressor components. With a mature product portfolio, the company focuses on four core product categories: compressor valves, packing seals, piston components, and regulating valve series. It offers over a hundred types of domestic replacement parts for internationally renowned brands such as PPI and MAN. Leveraging extensive technical expertise, DONGYI has successfully developed innovative high-performance products such as tungsten oxide/ceramic piston rods and ultra-fine wear-resistant fiber-filled PTFE sealing rings, filling critical market gaps. Its comprehensive product line covers all core compressor components including valves, pistons, connecting rods, and crankshafts, committed to delivering systematic, high-quality compressor parts solutions to global customers.