Maintenance
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GA01301_002_C1 - 07/2018 - © Leybold
5.3.2 PFPE
PFPE are practically inert against any kind of chemical and oxidative
influence. Against Lewis acids (like boron trifluoride BF3, aluminium trichloride
AlCL3, for example) they are not entirely inert. Here a reaction at tempera-
tures of approximately 100 °C or more can be expected.
PFPE are thermally highly stable. A thermal decomposition can occur only at
temperatures over 290 °C.
Perfluorinated polyethers will, when suffering thermal decomposition,
release toxic and corrosive gases.
In the case of PFPE at least a visual check is recommended.
Normally the oil will be light and transparent. In the case of an increasing
discoloration it is likely that the oil has taken up either liquid or solid process
media, and an oil change is recommended.
5.4 Oil Change
Pump and operating agents may be contaminated
Hazardous substances may escape from the pump and the oil. If there is
the danger that the operating agent may present a hazard in any way due
to decomposition of the oil, or because of the media which have been
pumped, you must determine the kind of hazard and ensure that all neces-
sary safety precautions are taken. Use gloves, face protection or a respira-
tor, for example.
Observe Safety Information 0.3 und 0.4.
Change the oil while the pump is cold so as to avoid releasing adsorbed
gases. If releasing adsorbed gases is no problem, change the oil after the
pump has been switched off and while the pump is still warm
Risk of suffering burns
With the pump warm from operation, both pump and oil can get so hot
that there is the risk of suffering burns. If required, wear gloves.
Check and top up oil only after having shut down the pump first.
When disposing of waste oil, observe the applicable environment protec-
tion regulations!
When changing the oil use the same type of oil which was previously in the
pump. If you want to change the type of oil entirely please consult us first.
CAUTION
WARNING
NOTICE
