Operation
20901552_EN-US_PC301x NT V.sel (Ser.Atb_Ha)_V1.1_160822
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5.2.3 Operation with gas ballast
Meaning
The supply from the gas ballast (= gas addition) ensures that vapors
are not condensed in the vacuum pump; instead, they are emitted
out of the pump. This allows greater amounts of condensable va-
pors to be pumped, which extends the service life. The end vacuum
with gas ballast is slightly higher.
Opening/closing the gas ballast valve
Operating
the gas ballast valve
ð
Turn the black gas ballast cap in any direction to open or close
the gas ballast valve.
ð
If possible, only evacuate the condensable vapors, e.g. water
vapor, solvents, etc., when the vacuum pump is at operating
temperature and the gas ballast valve is open.
ð
Connect inert gas as the gas ballast to prevent and exclude the
formation of potentially explosive mixtures during operation.
ð
Comply with the max. permitted pressure of 1.2 bar/900 Torr
abs. at the gas ballast connection.
If the gas volume in the vacuum pump is low, a gas ballast can be
eliminated in these cases to increase the solvent recovery rate.
