Design and function
MIG/MAG welding
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099-002061-EW501
05.05.2020
5.3.2 Shielding gas supply (shielding gas cylinder for welding machine)
• Place the shielding gas cylinder into the relevant cylinder bracket.
• Secure the shielding gas cylinder using a securing chain.
Figure 5-23
Item Symbol Description
0
1
Pressure regulator
2
Shielding gas cylinder
3
Output side of the pressure regulator
4
Cylinder valve
• Tighten the pressure regulator screw connection on the gas bottle valve to be gas-tight.
• Screw the gas hose connection nipple (intermediate hose package) onto the output side of the pres-
sure regulator.
5.3.2.1 Gas test – setting the shielding gas volume
If the shielding gas setting is too low or too high, this can introduce air to the weld pool and may cause
pores to form. Adjust the shielding gas quantity to suit the welding task!
Welding process
Recommended shielding gas quantity
MAG welding
Wire diameter x 11.5 = l/min
MIG brazing
Wire diameter x 11.5 = l/min
MIG welding (aluminium)
Wire diameter x 13.5 = l/min (100 % argon)
Helium-rich gas mixtures require a higher gas volume!
The table below can be used to correct the gas volume calculated where necessary:
Shielding gas
Factor
75% Ar/25% He
1.14
50% Ar/50% He
1.35
25% Ar/75% He
1.75
100% He
3.16
