16
Installation
5.3 Connections
Connecting the vac-
uum side
The connection between the pump and the vacuum chamber should be kept as short
as possible and should have at least the nominal diameter of the pump flange. Use a
greater nominal diameter on line lengths > 5 m.
Lay the pipes in such a way that the Roots or backing pump will not be subjected to
any mechanical tension.
– Suspension components should be integrated into the piping.
– Ensure that mating flanges are in a parallel position.
Clear welded lines of any welding scales, loose parts etc. before installation.
If dust appears in the intake medium, a dust filter must be installed in addition. When ex-
tracting vapors we recommend using condensate separators on the intake side and on
the exhaust side. Please enquire for details.
Connecting the ex-
haust side
Choose the cross-section of the exhaust line to be at least the size of the nominal
connection diameter of the vacuum pump's exhaust connection.
NOTICE
Electrostatic unloading procedures
Damage of safety-relevant parts or releasing unintentional machine movements.
Carry out installation works at the pumping station only by EMC trained specialists
according to the instructions of the parts manufacturers.
WARNING
Exposed, rotating rolling pistons!
Fingers and hands can become crushed when the intake flange is open.
Keep all body parts out of operating range of the rolling pistons.
Use a wooden handle to rotate the rolling pistons during cleaning.
NOTICE
Danger of intake of solid particles!
Even in clean processes, fouling from the system must be anticipated during initial com-
missioning.
Use a suitable start-up strainer at the intake connection (see accessories).
Ensure that this strainer is only removed when the risk of solid particles entering the
pump can be excluded.
Note loss of pumping speed if necessary.
CAUTION
High pressure in the exhaust line!
Danger of damage to the seals and danger of the pump bursting.
Install the line without shut-off valves on the exhaust side.
If there is danger of a build-up of excess pressure (> 1500 hPa abs.) in the lines, ob-
serve all official accident prevention safety regulations.
If the exhaust gases are being extracted, the exhaust pressure must be at least
250 hPa greater than the pressure at the intake side.
