5 Installation
The installation of the turbopump and its fastening is of outstanding importance. The rotor of the turbo-
pump revolves at very high speed. In practice it is not possible to exclude the risk of the rotor touching
the stator (e.g. due to the penetration of foreign bodies into the high vacuum connection). The kinetic
energy released acts on the housing and on the anchoring of the turbopump within fractions of a sec-
ond.
Comprehensive tests and calculations conforming to ISO 27892 confirm the safety of the turbopump
both against crashes (destruction of the rotor blades) and against bursting (breakage of the rotor shaft).
The experimental and theoretical results are expressed in safety measures and recommendations for
the correct and safe fastening of the turbopump.
5.1 Equipment installation conditions
WARNING
Risk of serious injury caused by the separation of the pump when the rotor is blocked
If the pump is not secured properly
and the rotor suddenly becomes blocked, the turbomolecular
pump will detach from the equipment: the energy released could launch the entire pump or pieces of
the pump across the room. This could cause severe, possibly fatal, injuries as well as serious proper-
ty damage.
► Strictly comply with the installation instructions described in this manual. Pfeiffer Vacuum will be
released from any warranty and liability for non-compliance with installation instructions.
► Only use approved original parts from Pfeiffer Vacuum for connection to the equipment (see ac-
cessories).
The equipment frame on which the pump is installed must be sufficiently rigid to absorb the kinetic ener-
gy if the rotor blocks suddenly. For this, take into account:
● The maximum loads to calculate the attachment devices.
● The inlet flange dimensions.
● The quality and number of screws.
● The type of connection between the pump inlet and the chamber to be pumped.
When the pump is connected according to the manufacturer’s recommendations, in case of overpres-
sure resulting from an incident, the pump enclosure can withstand maximum static pressure of
11 · 10
3
hPa for 1 minute.
5.1.1 Installation specifications
Turbo
1
2
3
Fig. 4:
Mechanical connection of the pump to the equipment
1 Vacuum chamber
3
Frame
2 Equipment
Secure anchor point
Installation
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