Shielding Gas; Filler Materials And Equipment - Kemppi HiArc S 140 Operating Manual

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 flow rate is approximately 8–15 litres per
minute, but this can vary according to the welding current used and the size
of gas nozzle.
Connect the TTM 15V TIG torch gas hose to the outlet of the regulator.
NOTE!
the cylinder valve. Always use a regulator and flow meter for safe and
accurate operation.
EN
1.
2.
3.
2.4

filler materials and equipment

See also 2.1 Main components. You can use all electrodes intended for
welding with DC. Suitable electrode sizes for the unit are listed in the end of
these instructions in Technical data.
1.
2.
3.
4.
8 8
Hiarc S 140
Under no circumstances should you connect the hose directly to
Connect the hose to the reduced pressure side of the cylinder
regulator, or flow meter and tighten the connector.
Adjust the shielding gas flow rate with the flow regulation adjustment
screw. A suitable gas flow rate is 8–15 l/min
Close the cylinder valve after use.
Use welding specifications given on electrode package.
Check that you have selected the correct welding process before
starting to weld.
Check that welding cable and earth return cable connections are tight.
If a connection is slack, it will result in voltage drop that will cause the
connection to heat.
Mount the electrode firmly in holder.