Impurities such as CH4, CO2 or H2 are found in oxygen and all process gases (freon, chlorine, argon or helium) when manufacturing Optical Fiber preforms. Levels can reach values of up to 10 ppm. Qualiflow Automated Gas Purifiers purify process gases by reducing the amount of impurities down to 0.2 ppm. Qualiflow offers very high quality Automated Gas Purifiers designed to dry and purify O2, He, Cl2, N2, Ar and Freon. Qualiflow Automated Gas Purifiers, ancillary equipment to Qualiflow Gas Systems, will provide the best results regardless of the process used when manufacturing Optical Fiber Preform (MCVD, OVD, PCVD or VAD).