EN
10
Shielding gas
In TIG welding, shielding gas is used to prevent atmospheric contamination
of the molten weld pool and cooling weld. Normally, the shielding gas
is argon (Ar). Normally the gas ow rate is approximately 8–15 litres per
minute, but this can vary according to the welding current used and the size
of gas nozzle.
The machine is delivered with a 4.5 m shielding gas hose. Connect the gas
hose snap connector to the male connector on the machine. The other end
of the gas supply hose should be connected to the outlet of the regulator.
NOTE! Under no circumstances should you connect the hose directly to
the cylinder valve. Always use a regulator and ow meter for safe and
accurate operation.
1. Connect the hose to the reduced pressure side of the cylinder
regulator, or ow meter and tighten the connector.
2. Adjust the shielding gas ow rate with the ow regulation adjustment
screw. A suitable gas ow rate is 8–15 l/min
3. Close the cylinder valve after use.
10 MinarcTig 180, 180MLP, 250, 250 MLP
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