5.1.2 Securing the equipment and the frame
Fastening the pump to the equipment
The maximum load caused by a sudden blockage must be absorbed by the pump's fastening elements.
► Design and secure the frame of the pump so that it can withstand the maximum load.
► The screws
must be
tightened with a torque wrench in accordance with the tightening torques in
the following table:
– if the torque is low: risk of screws loosening.
– if the torque is high: risk of the screws deteriorating.
Type of inlet flange
DN160 ISO-F
or ISO-K
DN100 ISO-F
or ISO-K
DN160 CFF
DN100 CFF
Type of screw
1)
M 10
M 8
M 8
M 8
Number of screw
1)
8
8
20
16
Screw metric grade
1)
12-9
12-9
12-9
12-9
Tightening torque per screw
1)
N·m
30
20
20
20
Total clamping force
N
108000
88500
222000
177000
Length of screw
mm
≥ 35
-
≥ 40
≥ 35
1) The type, number, grade and tightening torque of the screw are
imposed
and
mandatory
.
Tbl. 2:
Securing the high vacuum flange (inlet flange)
The manufacturer recommends using set of screws designed for this purpose (accessories).
Specific use of ISO-K flanges
ISO-K flanges do not prevent the accidental rotation of the pump around the equipment
flange in the event of the rupture of a rotating part. This rotation can damage roughing and
purge lines and can pose a risk to the user.
●
Use only rotating flanges.
● If claw clamps are used,
install the same number of claw clamps (made of stain-
less steel) as the recommended number of screws for fastening the ISO-F flange
(accessories).
Frame fastening
If the frame is not designed to withstand the maximum loads in case of sudden blockage, contact our
service center who will help you design your installation.
5.2 Positioning the pump
NOTICE
Pump damage caused by external vibrations
External pump vibrations or shocks may cause magnet bearing overload and therefore landing bear-
ing stress.
► Avoid lateral and tilting pump movements.
► Configure the equipment appropriately to compensate for external vibration.
► Secure the vacuum chamber on the equipment side against moving and tilting.
CAUTION
Risk of falling due to poorly-secured cables or pipework
The space around the pump must be kept clear of obstacles to prevent falls from potentially occur-
ring.
► Route and secure electric cables and pipework in the appropriate pathways.
Installation
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