Design and function
Shielding gas supply (shielding gas cylinder for welding machine)
28
099-005313-EW501
02.09.2015
5.6.2
Gas test, rinse hose package
• Slowly open the gas cylinder valve.
• Open the pressure reducer.
• Switch on the power source at the main switch.
• Trigger gas test function on the machine control by pressing the button briefly.
• Set the relevant gas quantity for the application on the pressure reducer.
Operating
element
Action
Result
Select gas test, rinse hose package.
Shielding gas flows for around 25 seconds or until the button is pressed
again. Repeat rinsing process several times.
5.6.2.1 Setting the shielding gas quantity
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)
TIG
Gas nozzle diameter in mm corresponds to l/min gas throughput
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
Incorrect shielding gas setting!
• 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!
