Fig. 5: Example: Secure against displacement and tipping caused by external vibrations
1
Safety connections, customer-side
5.2.3 Using a splinter shield or protective screen
Pfeiffer Vacuum centering rings with splinter shield or protective screen in the high vacuum flange pro-
tect the Turbopump against foreign matter from the vacuum chamber. The puming speed of the pump is
reduced according to the passage guide values and the size of the high vacuum flange.
Flange size Reduced pumping speed in % by gas type
H
2
He N
2
Ar
Splinter shield DN 200 10 13 26 28
Protective screen DN 200 3 3 8 9
Tbl. 8: Behavior of pumping speed when using a splinter shield or protective screen
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Use centering rings with protective screen or splinter shield for ISO flanges.
►
Use additional protective screen or splinter shield for CF flanges.
5.2.4 Using the vibration compensator
Pfeiffer Vacuum vibration compensators are suitable for use on vibration-sensitive systems.
WARNING
Risk of injury caused by the turbopump breaking away with the vibration compensator in the
event of a malfunction
Sudden jamming of the rotor generates high destructive torques in accordance with ISO 27892.
When using a vibration compensator, this will probably lead to the turbopump being sheared off in
use. The energy that this would release could throw the entire turbopump or shattered pieces from its
interior through the surrounding space. Potentially dangerous gases can escape. There is a risk of
very serious injuries, including death, and extensive property damage.
►
Take suitable safety precautions on-site for the compensation of the occurring torques.
►
Before installing a vibration compensator, you must first of all contact Pfeiffer Vacuum.
Installing the vibration compensator
1. Install the vibration compensator only with vertical passage.
2. Consider the flow resistance.
3. Secure the turbopump additionally to the high vacuum flange.
4. Observe the fastening of the ISO flanges.
Installation
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