Wenzhou Dongyi Machinery Manufacturing Co. Ltd is one of the best High-Tech Industry factories in China. We have more than 30 years of experience in designing and manufacturing reciprocating compressor parts. Such as valve, packing assembly, connecting rod assembly, piston assembly, crankshaft, bearing, oil scraper ring assembly, chapter title assembly. We have been providing extensive services in the Metallurgical Industry, Gas & Chemical Industry, Electric Power Industry, Mining Industry, Petrochemical Industry, Machinery Industry, CNG Industry… With full control of the quality system, strict quality procedures, the level of facilities and technology quality we have achieved international standards. We have more than 100 sets of machines for production and quality testing CNC Machines, Laser Machines, Grinding Machines, Cylindrical Grinders, Internal Grinding Machines, Surface Grinding Machines, R-angle Grinding Machines, Lapping Machines, Lathes for production; Gas Seal Test-bed, Hardness Testing Instruments, Spectrophotometer, Ultrasonic Detection, Magnetic Particle Testing, CMM, Crank Detection Instruments, Vernier Calipers, Spring Fatigue Testing Instruments, Bridge Type Three Coordinate Detection Instruments for quality control system. My factory was established in 2006 in Wenzhou, As an industry leader designing and manufacturing parts for piston compressors and gas separation plants in China. Our products are widely used for metallurgy, mining, petrochemical industry, gas separation, chemical industry, textile industry, food industry, medical industry etc. Providing OEM services. Quality and Honor The company has passed ISO9001 certification. The valve design has been patented to improve and extend service life. Successfully invented tungsten oxide & ceramic piston rods. Creating prime abrasion resistant fiber filled PTFE to manufacture piston rings, support rings, packing seal rings, to fill gaps in the market. Main Compressor Brands PPI, MAN, SAID, GE, DRESSER-RAND, NUOVO PIGNONE etc. All Kinds of Chinese compressor brands