Kemppi Evo 170 User Manual download pdf (Page 9)

Shielding gas

Shielding gas is used for replacing air around the welding arc. For steel wires, use CO₂ (carbon

dioxide) or a mixture of Ar (argon) and CO₂ for shielding gas. Welding performance will be

improved when using mixed gas products. For stainless steel wires, use mixture of Ar and

CO₂ (2 %), and for aluminium and CuSi wires, use pure argon. The required ow rate of the

shielding gas is determined by the thickness of the welded sheet and the used welding power.

The machine is delivered with a 4.5 m long gas hose. Connect the supplied female snap

connector of the gas hose to the machine’s male connector. Connect the other end of the gas

hose to the gas cylinder via a suitable and approved single stage regulator valve, where outlet

ow rates can be adjusted.

NOTE! Never attempt to connect directly to a compressed gas cylinder. Always use an approved

and tested regulator and ow meter.

l/min

Connecting the gas hose to a typical welding regulator control valve

1. Connect the hose to the welding machine snap connector

2. Open the regulator valve of the gas cylinder

3. Measure the gas ow

4. Adjust the ow with the adjustment knob (10–15 lpm)

NOTE! Use a suitable shielding gas for the welding application. Always secure the gas cylinder in an

upright position with either a specially made wall rack or cylinder trolley. Always close the cylinder

valve after welding.

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Kemppi Evo 170 User Manual Page 9