8 Decommissioning
8.1 Decommissioning the vacuum pump for longer periods
Before shutting down the vacuum pump, observe the following instructions to adequately protect the in-
terior of the vacuum pump (pumping system) against corrosion:
Prerequisites
● Vacuum pump is switched off.
● Vacuum pump is vented to atmospheric pressure on the suction side.
● Vacuum pump is cool.
Procedure
1. Remove the vacuum pump from the vacuum system if necessary.
2. Change the operating fluid.
3. Start the vacuum pump and take it up to operating temperature in order to wet the inside of the
pumping system with fresh operating fluid.
4. Switch off the vacuum pump.
5. Fill the vacuum pump to above the
“max.” mark
with operating fluid, up to the upper edge of the
sight glass.
6. Seal the vacuum and exhaust flanges with blank flanges and circlips.
7. Seal additional openings of the vacuum pump as required.
8. Close the gas ballast valve.
9. Store the vacuum pump in a dry, dust-free room outside of the potentially explosive area observ-
ing the ambient conditions stipulated.
10. In rooms with humid or aggressive atmospheres: Hermetically seal the vacuum pump together
with a drying agent in a plastic bag.
11. Please note, the vacuum pump may not be stored in the vicinity of machines, traffic routes, etc.,
as strong vibrations may damage the bearing.
12. For longer storage periods (> 2 years), Pfeiffer Vacuum recommends changing the operating fluid
again prior to recommissioning.
8.2 Recommissioning
DANGER
Risk of explosion from electrostatic charging during transport
There is a risk of fatalities when transporting packaging material (foil) and plastic containers in poten-
tially explosive areas. Ignition can cause very serious injuries, and even fatalities.
► Only unpack the vacuum pump outside of potentially explosive areas.
NOTICE
Risk of damage to vacuum pump as a result of operating fluid aging
The operating fluid usability is limited (max. 2 years). Prior to recommissioning, following a shutdown
of
2 years or more
, carry out the following work.
► Change the operating fluid.
► Replace all elastomer parts.
► Observe the maintenance instructions – consult Pfeiffer Vacuum if necessary.
Ejection of operating fluid
Operating fluid ejection at the exhaust connection after overfilling.
● Drain operating fluid to the normal level prior to recommissioning.
Decommissioning
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