Pfeiffer Vacuum BA 251, Operating Instructions Manual

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36
Decommissioning
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.
 Change the operating fluid
(see p. 29, chap. 7.2)
.
 Switch pump on and bring to operating temperature.

Turn off the vacuum pump, vent to atmospheric pressure and allow to cool.
 Close the flange openings by using the original protective covers.
 Stop cooling water feed and remove cooling water intake and output lines.
 Unscrew cooling water drain screw 62 and empty cooling water chambers to avoid
rust and frost damage.
 Fill in additional operating fluid in accordance with table below:
– BA 251: 5 l
– BA 501: 10 l
 Store the pump only dry and dust-free indoors within the specified environmental con-
ditions.
– 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 operating fluid 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 dome before taking it into operation. If there is ev-
idence 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 radial shaft sealing rings. With reference to DIN 7716 and the manufacturer's
specifications we recommend replacing the installed elastomer parts after 2 years. After
this time the bearings should also be replaced; contact Pfeiffer Vacuum Service.
 If drying pearls were inserted then they should be removed now. Improper handling
can cause failure of the pump.
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.
Emission of operating fluid!
Danger of the operating fluid being emitted at the exhaust flange if overfilled.
 Drain the operating fluid to the normal level before restarting the pump.