Welding Equipment UVU CRT 2009 Welder The welder used in the Spanish Fork High Collision Repair Shop is a 135 amp wire feed Metal Inert Gas (MIG) welder. UVU CRT 2009 Shielding Gas A 75% Argon 25% Carbon Dioxide (C25) gas is used to protect the weld puddle from contaminates. This mix gives a quality flat weld that is beneficial for collision work. UVU CRT 2009 Gas Regulator This is the pressurized gas regulator. The optimum flow setting is 17 cubic