KFDJ was founded in 1970’s and built into a group company, For about 40 years, KFDJ has management experience and rich reference of plant operation as well as ever-advancing technology for designing and manufacturing different size air separation plants with capacities from 50Nm3/h up to 80000Nm3/h, including their associated equipment such as centrifugal air compressors, oxygen and nitrogen reciprocation compressors, turbo-expanders, coolers, etc.