16
Installation
5.4
Connecting the high vacuum side
If the rotor is suddenly blocked, the torques arising from the system and the high vacuum
flange must be absorbed. Only the components listed in the following can be used to fas-
ten the turbopumps to the high vacuum flange. The installation elements for turbopumps
are special designs by Pfeiffer Vacuum. In all operating conditions, the tensile strength
of the flange material must be at least 170 N/mm
2
.
Secure the vacuum chamber against shifting and tipping on customers side.
5.4.1
Installation of ISO-K flange with ISO-K flange
For the installation the following components are exclusively authorized:
●
the valid mounting kit of the Pfeiffer Vacuum accessories programme
●
mounting materials including protection screen or splinter shield are optionally avail-
able
Mind that the sealing surfaces are not damaged.
1) Connect the flanges according to the drawing and with the component parts of the
mounting kit.
2) Use the required number of
16
claw clamps.
3) Tighten the claw clamps crosswise in three steps.
4) Tightening torque: 5, 15, 25 ±2 Nm
DANGER
Danger to life - impermissible fastening
Twisting or tearing-off is possible in case the rotor is suddenly blocked due to the fas-
tening of pumps on a vacuum chamber with different flange variants.
Use only the correct mounting kit from Pfeiffer Vacuum.
Pfeiffer Vacuum will not accept any liability for all damages resulting from impermis-
sible fastening.
NOTICE
Observe shape tolerances for the counter flange
Unevennesses of the customer supplied counter flange can lead to warping of the pump
casing despite proper fastening. Leakiness and negative running characteristics can be
the result.
Do not exceed an evenness of max. 0.05 mm for the whole surface.
Mounting of ISO flanges
If the rotor suddenly blocks the connection of high vacuum flanges of types ISO-KF or
ISO-K can lead to twisting despite proper installation.
●
The tightness of the high vacuum flange is not at risk thereby.
