94
6 Maintenance
W1 Filling flange
1 Gas cylinder
2 Pressure reducer regulating valve
3 Precision pressure gauge (-1.0 bar up to 9.0 bar)
4 Safety valve
Fig. 65 Gas filling device connected
To fill, couple the service connection of the filling device with the filling connection W1 (Fig. 63). Slowly open the
regulating valve (Fig. 65) at the pressure reducer with the vent valve closed, to avoid any ice formation at the
fitting. Monitor the filling process at the precision pressure gauge 3.
Care must be taken that the filling pressure, which depends on the ambient temperature, is correct. For nominal
filling pressure see diagram in section 3.1 Technical Data.
At an ambient temperature other than +20°C, the SF
6
filling pressure must be taken from the diagram (Fig.1).
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