SUFA TECHNOLOGY INDUSTRY CO., LTD. CNNC , founded in 1952, is one of leading industrial valve manufacturers and first listed valve company in china. The company specialized in R&D, design, manufacturing, marketing and service of gate valves, globe valve, check valve, ball valve, butterfly valve, control valve, nuclear valve and etc that meet API 6A/6D/600, CE, DNV, BV, ABS and various special requirements.