GB 03367 - Edition 03 - Jan. 12
5/5
B 300
Pump connections to an installation
*
Type, Number, Grade and Torque are mandatory
The resulting maximum loads from a crash have to be taken into
account by the pump assembly bolts.
Design and secure the pump frame so that it can withstand the
loads.
Inlet flange installation
conditions (item 2)
Mounting holes at inlet flanges
ATH 500 M-MT
Inlet flange (with centering ring)
DN160 ISO-F
ou ISO-K
DN100 ISO-K
DN160 CFF
DN100 CFF
Type of bolts *
M 10
M 8
M 8
M 8
Number of bolts *
8
8
20
16
Length of bolts (mm)
≥
35
−
≥
40
≥
35
Bolt metric grade *
12-9
12-9
12-9
12-9
Installation torque per bolt (N.m)*
30
20
20
20
Total clamping force (N)
108000
88500
222000
177000
For safety reasons, it is important to tighten the bolts with a torque wrench
according to the specified values :
- lower torque: risk of loosened bolts
- higher torque: risk of damaging the bolts.
We strongly recommend the use of ISO-F or CF-F flanges. ISO-K type flanges
are not recommended to fasten turbomolecular because:
The ISO-K flanges do not prevent accidental rotation of the pump on the
equipment flange in case of pump rotor crash. This rotation could damage
the foreline and the purge gas line which would generate hazards for the
user.
- For ISO-K flanges, we recommend to use a rotatable flange. In case of use
of claw clamps, mount the same number of claw clamps (in stainless steel),
as the number of screws recommended for the ISO-F flange.
Equipment installation
conditions
If the equipment cannot withstand the maximum loads in case of rotor
crash, please contact the manufacturer for further consultations.
adixen Vacuum Products - Operating instructions - ATH 500 M-MT
adixen Vacuum Products - Operating instructions - ATH 500 M-MT
