8 Decommissioning
8.1 Shutting down for longer periods
Before shutting down the vacuum pump, observe the following instructions to adequately protect the in-
terior of the vacuum pump (suction chamber) from corrosion:
Shutting down the vacuum pump
1. Switch off the vacuum pump.
2. Vent the vacuum pump.
3. Allow the vacuum pump to cool down.
4. Clean suction chamber.
5. Change the lubricant.
6. Seal the vacuum flange and fore-vacuum flange and any other openings with closing caps.
7. Evacuate the pump interior via the measurement connection on the vacuum side, to p < 1 hPa.
8. Fill the suction chamber with nitrogen.
9. Store the vacuum pump in dry, dust-free rooms, within the specified ambient conditions.
10. In rooms with damp or aggressive atmospheres, you should package the vacuum pump in a plas-
tic bag together with a drying agent, and seal it so that it is airtight.
11. For storage durations longer than 2 years, we recommend you carry out maintenance and a lubri-
cant change prior to recommissioning.
12. Please note, the vacuum pump may not be stored in the vicinity of machines, traffic routes, etc.,
as strong vibrations may damage the bearing.
8.2 Recommissioning
DANGER
Risk of explosion from electrostatic charging during transport
There is a risk of sustaining injury from packaging material (foil) and plastic containers during trans-
port in potentially explosive atmospheres.
► The packaging should never be removed from the vacuum pump in potentially explosive atmos-
pheres.
NOTICE
Damage to the roots pump due to aging of the lubricant
The useful life of the lubricant is limited (max. 2 years). Prior to recommissioning, carry out the follow-
ing operations following inactivity of
2 years or more
:
► Observe the maintenance instructions – consult Pfeiffer Vacuum where necessary.
► Change the lubricant.
► Check the bearing and replace any worn elastomer parts.
Control work before re-commissioning
1. Check the roots pump for visible damage and operate the roots pump only in an appropriate oper-
ating status.
2. Check the interior of the pump for contaminants.
3. Remove any drying pearls from the suction chamber.
4. Do not operate the vacuum pump and notify
in the event of housing parts
exhibiting signs of rust.
5. Perform a leak test prior to recommissioning the vacuum pump as required.
Decommissioning
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