Mounting and
commissioning
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2019-10-16
6
–3
6.3.3
Protective gas
The protective gas only nitrogen or argon may be used with a purity
status of at least 99.9 %. The supply is effected via a compressed air
hose having an inner diameter of 6 mm. The inlet pressure must not
exceed 8 bar. Gas consumption is about 1 - 3 l/min. Please use only
a constant pressure regulator.
Figure 32: constant pressure regulator
6.3.4
Vacuum
Here, a vacuum pump with a suction capacity of at least 8 m³/h and a
final pressure of 2 mbar should be connected via a tube of 8 mm in
outside diameter. Keep the tube short to avoid vacuum loss. The
pump should run 5 minutes
before and after
the casting to bring the
pump at working temperature and evaporate moisture in the end.
For detailed information, please also refer to the operating manual in
maintenance of the vacuum pump.
6.3.5
Gas out
Exit to the pressure reduction. This output must be kept clear at all
times. You can connect a hose to lead fumes to the outside.
Figure 33: Check of the backside connections
2x gauges in bar/PSI/kPa/MPa
Never in liter/minute (l/min)!!!!
