Decommissioning
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8
Decommissioning
8.1
Shutting down for longer periods
Follow the following procedure before shutting down the pump for a longer period of time:
Switch off the pump.
Clean and slightly lubricant suction chamber and overflow valve.
Change lubricant.
Close off the vacuum and fore-vacuum flange.
Evacuate the suction chamber to p<1 hPa via the suction-side measuring connection
at room temperature and fill the chamber with nitrogen.
Store the pump only indoors, preferably at temperatures between -10 °C and +40 °C.
– In rooms with moist or aggressive atmospheres, the pump must be airproof shrink-
wrapped in a plastic bag together with a bag of desiccant.
– After storage periods longer than two years, it is recommended to carry out main-
tenance and change the lubricant before using the pump.
Do not store pump in the vicinity of machines, lanes, etc., because strong vibrations
can damage the rotor bearings.
8.2
Re-starting
Visually inspect the inner of the pump before taking it into operation. If there is evidence
of rust on the parts of the pump which form the housing then do not take it into operation
and contact Pfeiffer Vacuum Service.
Depending on how long the pump is taken out of operation, it may be necessary to re-
place the elastomer parts. In accordance with DIN 7716 and the manufacturer's specifi-
cations we recommend replacing the installed elastomer parts after 2 years.
Check pump for visible damage and only start up if it is in the correct condition.
If drying pearls were inserted then they should be removed now.
Subject pump to a leak test before restarting operation.
8.3
Disposal
Products or parts thereof (mechanical and electrical components, operating fluids, etc.)
may cause environmental burden.
Safely dispose of the materials according to the locally applicable regulations.
NOTICE
Re-starting
The serviceability of the lubricant without operation is a maximum of 2 years. Before re-
starting after a shut-down of
2 years or longer
, carry out the following work.
Replace the lubricant.
Replace bearings.
Follow the maintenance instructions and inform Pfeiffer Vacuum.