16
Operation
Fig. 11: Standard version 74 of gas ballast valve
Gas ballast valve, cor-
rosive gas version
If the pumping process requires the connection of flushing gas, the C version of the
gas ballast with the flushing gas connection must be used.
Fig. 12: Gas ballast valve, corrosive gas version
Î
Connect flushing gas at the hose nozzle of the gas ballast valve.
Î
Set flushing gas pressure; maximum pressure 1.5 bar (absolute).
– Select the type and amount of flushing gas depending on the process; consult
Pfeiffer Vacuum if necessary.
C-Version
CAUTION
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
increase.
Î
Observe the maximum permissible flushing gas pressure.
Î
Set the maximum permissible flushing gas pressure via the spindle in the gas ballast
valve or on site!
