GB 02923 - Edition 05 - 03/2013
5/5
B 300
Pump connections to an installation
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:
• There is no visual reminder (like threaded holes on ISO-F) to signal
how many clamps are needed to secure the pump,
• It is not as easy to fasten claw clamps on ISO-K flanges as to secure
bolts on ISO-F flanges,
• 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.
Inlet flange installation
conditions (cont.)
Equipment installation
conditions (item 3)
(Option)
Optionally, if the equipment flange cannot be designed to withstand
the maximum loads in case of rotor crash, an additional bracket can
be fixed to the bottom of the pump (6 x M10 threaded holes are
provided on this purpose). In this case, contact the manufacturer for
calculation support.
ATPM
3
ATPM
Chamber
Equipmen
t
Bracket
Frame
adixen Vacuum Products - Operating Instructions - ATP 2300 M