Design and function
TIG welding
099-002061-EW501
05.05.2020
37
5.4.2 Connecting a TIG welding torch with rotating gas valve
Prepare welding torch according to the welding task in hand (see operating instructions for the torch).
Figure 5-31
Item Symbol Description
0
1
Workpiece
2
Connection socket, welding current (workpiece)
3
Output side of the pressure regulator
4
Welding torch
5
Connection socket, welding current (electrode holder)
Welding current lead connection for TIG welding torch
• Insert cable plug on the workpiece lead into the welding current socket “
” and lock by turning to
the right.
• Plug the welding current plug of the welding torch into the connection socket and lock by turning to
the right.
• Screw the shielding gas hose of the welding torch to the pressure regulator outlet.
• Slowly open the gas cylinder valve.
• Open the welding torch rotary valve.
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.
• Set the required shielding gas quantity at the pressure regulator.
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.
