Pfeiffer Vacuum Duo 2.5, Operating Instructions Manual

Page: 19 / 32

Maintenance
19
 Drain off remaining operating fluid.
– In case of serious contamination, the operating fluid will have to be changed sev-
eral times (flushing):
Flushing
 Fill up with operating fluid to the middle of the sight glass.

Operate the pump with the gas ballast open until the pump has warmed up.
 Drain the operating fluid again and check for contamination, flush again if necessary.
 Screw the operating fluid drain screw back in.
 Fill up with operating fluid and check the filling level
(see p. 9, chap. 5.2)
.
Request safety data sheets for operating fluids and lubricants
from Pfeiffer Vacuum or download them from the Internet.
 Dispose of operating fluid according to the local regulations.