18
Operation
Fig. 11: Standard version 42 of gas ballast valve
Gas ballast valve with
flushing gas connec-
tion (option)
If the pumping process requires the use of flushing gas, a supply hose can be connected
at the gas ballast valve.
Fig. 12: Gas ballast valve with flushing gas connection
Connect flushing gas at the flushing gas connection.
Set flushing gas pressure; maximum pressure 1.5 bar (absolute).
– Select the type and amount of flushing gas depending on the process; consult Pfei-
ffer Vacuum if necessary.
0
0
1
1
0
1
0
1
NOTICE
Flushing gas pressure higher than allowed endangers the operational reliability
of the pump.
The power input of the pump, the temperature and the ejection of operating fluid will in-
crease.
Observe the maximum permissible flushing gas pressure.
Set the amount of flushing gas on site.
