5 OPERATION
0463 815 001
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© ESAB AB 2021
4. Be sure that the regulator has the correct pressure rating and gas service for the cylinder
used.
NOTE!
For MIG application, the gas mixture used is 80% argon and 20% carbon dioxide.
For MAG application, 100% carbon dioxide is used.
5. Carefully inspect the regulator for damaged threads, dirt, dust, grease, oil, or other flammable
substances. Remove dust and dirt with a clean cloth. Be sure the inlet swivel filter is clean and
in place. Attach the regulator to the cylinder valve. Tighten securely with a wrench.
WARNING!
Do not attach or use the regulator if oil, grease, flammable substances or damage is
present! Have a qualified repair technician clean the regulator or repair any damage.
Figure 17: Regulator to cylinder valve
6. Before opening the cylinder valve, turn the regulator adjusting screw counter-clockwise until
there is no pressure on the adjusting spring and the screw turns freely.
7. Relief valve (where provided): The relief valve is designed to protect the low pressure side of
the regulator from high pressures. Relief valves are not intended to protect downstream
equipment from high pressures.
WARNING!
Do not tamper with the relief valve or remove it from the regulator.
WARNING!
Stand to the side of the cylinder opposite the regulator when opening the cylinder valve.
Keep the cylinder valve between you and the regulator. For your safety, never stand in
front of or behind a regulator when opening the cylinder valve!
