ESAB CIGWELD WeldSkill 205AC/DC Operating Manual page 36

Installation
1. Remove cylinder valve plastic dust seal. Clean the cylinder valve outlet of impurities that may clog
orifices and damage seats before connecting the regulator.
Crack the valve (open then close) momentarily, pointing the outlet away from people and sources of
ignition. Wipe with a clean lintless cloth.
2. Match regulator to cylinder. Before connecting, check that the regulator label and cylinder marking
agree and that the regulator inlet and cylinder outlet match. NEVER CONNECT a regulator designed
for a particular gas or gases to a cylinder containing any other gas.
3. Connect the regulator inlet connection to cylinder or pipeline and tighten it firmly but not excessively,
with a suitable spanner.
4. Connect and tighten the outlet hose firmly and attach down-stream equipment. The flowmeter must
be in the vertical position to read accurately.
5. The regulator/flowmeter has a self-reseating relief valve – not designed to protect down stream
equipment. To protect sensitive down-stream equipment a separate safety device may be necessary.
Operation
With the regulator connected to cylinder or pipeline:
1. Stand to one side of regulator and slowly open the cylinder valve. If opened quickly, a sudden
pressure surge may damage internal regulator parts.
2. Since the regulator is a preset type, no adjustments to the regulator are necessary. Before
opening the cylinder valve, be sure that the flow adjusting valve is in a finger-tight "OFF" position
(clockwise).
3. Slowly and carefully, open the cylinder valve until the maximum pressure registers on the high
pressure gauge.
CAUTION
!
DO NOT purge oxidising or flammable gases in the presence of flame, lighted cigarettes, or other sources of ignition or in
a confined space. Open each downstream valve in turn, if more than one regulator is used. Close one valve before open-
ing the next one. This procedure will prevent explosive gas mixtures occurring in the welding hose between regulators
and equipment.
Close equipment valve(s) after purging, and test all connections for leaks with a suitable leak detection solution or
soapy water. Never use a flame when testing for leaks.
Adjusting Flow Rate
Flow Rate Adjusting Valve
With the regulator ready for operation, adjust working flow rate as follows:
1. Slowly turn adjusting valve in an anti-clockwise direction to open and increase until the bobbin in
the flow tube indicates the required flow rate.
NOTE!
It may be necessary to re-check the shielding gas regulator/flowmeter flow rate following the first weld sequence due to
back pressure present within shielding gas hose assembly.
TIG (GTAW) Welding
Preset Argon Regulator
Open / Increase
Desrease / Close
Gas Hose
A-13922_AB
Figure 5-2: Adjust Flow Rate
5-2
Cylinder
0-5555