Design and function
TIG welding
26
099-002128-EW501
26.01.2022
5.3.2.1 Pressure regulator connection
Figure 5-11
Item Symbol Description
0
1
Pressure regulator
2
Output side of the pressure regulator
3
Shielding gas cylinder
4
Cylinder valve
• Before connecting the pressure regulator to the gas cylinder, open the cylinder valve briefly to blow
out any dirt.
• Tighten the pressure regulator screw connection on the gas bottle valve to be gas-tight.
• Screw the gas hose connection to the outlet side of the pressure regulator gas-tight.
5.3.3 Welding task selection
Figure 5-12
5.3.3.1 Gas test – setting the shielding gas volume
If the rotary gas valve is open, the shielding gas flows permanently from the welding torch (no
adjustment with a separate gas valve). The rotary valve must be opened before each welding
procedure and closed after each welding procedure.
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!
Rule of thumb for the gas flow rate:
Diameter of gas nozzle in mm corresponds to gas flow in l/min.
Example: 7mm gas nozzle corresponds to 7l/min gas flow.
• Slowly open the gas cylinder valve.
• Set the relevant gas quantity for the application on the pressure regulator.
