Argon purification system comprises of ambient temperature molecular sieve adsorption step, ambient temperature chemisorption step, and cryogenic temperature adsorption step, particularly useful with liquefaction of the purified argon. It utilizes a heated getter purifier bed that delivers the high-purity argon that is critical for the manufacture of high quality, oxidation-free welds. As a heated unit, the system allows for use of the entire volume of the getter material resulting in extremely high capacities to remove all impurities such as H2O, CO, CH4, N2 and CO2.