GA 02.200/8.02 - 10/02
Operation
10
2.3 Connection to Vacuum
System
(see Fig. 7)
If you have not already done so, remove the temporary
covers from the inlet and exhaust ports.
Use flexible metal bellows to connect the intake and
exhaust lines without straining them.
The lines and the sealing surfaces of the flange connec-
tions must be clean.
When pumping vapours, it is advisable to insert conden-
sate traps on the intake and exhaust sides (see Section
1.3).
2.3.1 Intake Side
The cross-section of the intake line should be at least the
same as that of the inlet port. If the intake line is too nar-
row, it reduces the pumping speed.
If the medium pumped contains dust, a dust filter should
be installed upstream of the pump in addition to the dirt
trap supplied.
We strongly recommend installing a SECUVAC valve
between the vacuum system and the inlet port. This
valve closes automatically when the pump is not running
and thus protects the vacuum system against the entry
of air and oil from the pump. The valve simultaneously
vents the pump when it is not running.
2.3.2 Exhaust Side
The exhaust gases must be lead away safe-
ly and - if required - subjected to suitable
post-processing.
To prevent the room in which the pump is located from
being contaminated by oil mist or the medium pumped,
we strongly advise you to connect an exhaust line. This
is always needed if the exhaust gas is noxious.
Depending on the application of the pump
and the medium pumped, please observe
the relevant safety rules and specifications.
To remove oil mist from the pump's exhaust gas, it is
recommended to install an exhaust filter or to replace the
exhaust box by an exhaust filter box (AFK 1 / AFK 2, see
Accessories).
The cross-section of the exhaust line should be at least
the same as that of the pump's exhaust port. If the
exhaust line is too narrow, excessive pressures may
build up in the pump.
Install the exhaust line with a downward slope so as to
prevent condensate flowing back into the pump. If this is
not possible, insertion of a condensate trap is strongly
recommended (see Section 1.3).
If several pumps are connected to a common exhaust
line, ensure an adequate cross-section and a non-return
valve at the exhaust of each pump.
In order to avoid an inadmissible excess
pressure in the exhaust line we generally
recommend installing an overpressure pro-
tection facility when starting up the pump for
the first time.
You can install either an excess pressure valve or a bur-
sting disk (response pressure p < 1500 mbar, abs.). The
corresponding safety device must be installed in a such
a way to prevent any damages to property or persons.
On no account may the pump be operated with a blocked
or restricted exhaust line. Make sure before start-up that
any blinds or similar shut-off devices in the exhaust line
on the pressure side are opened and that the exhaust
lines are not obstructed by deposits.
Warning
Warning
Warning
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