Operation
16
GA 01.600/10.02 - 07/01
2.5.2 Pumping of Condensable Gases
and Vapours
With the gas ballast valve (option) open and when the
pump is running at its operating temperature, pure water
vapour can be pumped up to the extent stated in the
technical data for the pump (position 3 of the gas ballast
valve). When the vapour pressure increases above the
permissible level, the vapour will condense in the oil of
the pump.
When pumping vapours make sure that the gas ballast
valve is open and that the pump has been running for at
least 30 minutes with the intake line closed and with gas
ballast.
It will be possible to pump vapours up to the
permissible limit only after the pump has
reached its operating temperature.
During the pumping process vapours may
dissolve in the oil of the pump. This impairs
the properties of the oil and there is the risk
of corrosion within the pump. For this rea-
son the pump must not be switched off
immediately after termination of the pro-
cess. The pump must remain on with the
gas ballast valve open and the intake line
sealed until all vapours which were dissol-
ved in the oil have been removed.
We strongly recommend that the TRIVAC
D 5 E - D 16 E pumps be left running for
about 30 minutes after termination of the
process.
In the case of cyclic or repetitive processes the TRIVAC
D 5 E - D 16 E should not be switched off during the bre-
aks between the individual work phases (low energy
requirement when running at ultimate pressure).The gas
ballast valve should be opened and the intake line
should be sealed (through a valve, if possible).
When all vapours have been pumped from a process
(drying, for example) the gas ballast valve can be closed
to improve the attainable ultimate pressure.
2.5.3 Operating Temperature
Proper operation of the TRIVAC D 5 E - D 16 E is
ensured at ambient temperatures between 10 °C and
50 °C, with the exception of the pump models for the
USA and Japan where a range of 10 °C to 40 °C applies.
When using SHC 224 Arctic oil, the pump will reliably run
up even at a temperature of 5 °C.
When the pump is warm, the temperature at the surface
of the oil box may rise to between 40 °C and 80 °C,
depending on the load on the pump.
TRIVAC E pumps may attain surface tem-
peratures of over 80 °C.
There is the danger of receiving burns.
Caution
Warning
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