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2.7. Shielding gas
Handle gas bottle with care. There is a risk of injury if gas bottle or bottle valve
gets damaged!
For welding stainless steels, mixed gases are normally used. Check that the gas bottle
valve is suitable for the gas. The fl ow rate is set according to the welding power used in
the job. A suitable fl ow rate is normally 8 - 10 l/min. If the gas fl ow is not suitable, the
welded joint will be sporous. Contact your local Kemppi-dealer for choosing gas and
equipment.
2.7.1. Installing gas bottle
Always fasten gas bottle properly in vertical position in a special holder on the
wall or on a carriage. Remember to close gas bottle valve after having fi nished
welding.
Parts of gas fl ow regulator
A
Gas bottle valve
B
Press regulation screw
C
Connecting nut
D
Hose spindle
E
Jacket nut
F
Gas bottle pressure meter
G
Gas hose pressure meter
The following installation instructions are valid for most of the gas fl ow regulator types:
1.
Step aside and open the bottle valve (A) for a while to blow out possible impu-
rities from the bottle valve.
2.
Turn the press regulation screw (B) of the regulator until no spring pressure can
be felt.
3.
Close needle valve, if there is one in the regulator.
4.
Install the regulator on bottle valve and tighten connecting nut (C) with a
wrench.
5.
Install hose spindle (D) and jacket nut (E) into gas hose and tighten with hose
clamp.
6.
Connect the hose with the regulator and the other end with the wire feed unit.
See 2.5.2. Main parts of wire feed mechanism. Tighten the jacket nut.
7.
Open bottle valve slowly. Gas bottle pressure meter (F) shows the bottle
pressure. Note! Do not use the whole contents of the bottle. The bottle should
be fi lled when the bottle pressure is 2 bar.
8.
Open needle valve if there is one in the regulator.
9.
Turn regulation screw (B) until hose pressure meter (G) shows the required
fl ow (or pressure). When regulating fl ow amount, the power source should be
in switched on and the gun switch pressed simultaniously.
Close bottle valve after having fi nished welding. If the machine will be out of use for a
long time, unscrew the pressure regulation screw.
PROMIG 200ML/0509 – 8
F
A
C
G
B
E
D
© KEMPPI OY
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