14
Installation
Installing the high
vacuum flange
In the case the rotor suddenly blocks, 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 fasten the turbopumps to the high vacuum flange. The components for installing
the turbopumps are special designs of Pfeiffer Vacuum. Observe the minimum strength
of 170 N/mm
2
for the flange material.
Installation of ISO-K
flange with ISO-K
flange
For the installation of the flange connections the following components are available:
●
the valid mounting kit of the Pfeiffer Vacuum accessories programme
●
protection screen or splinter shield are optionally
Mind that the sealing surfaces are not damaged.
Connect the flanges according to the drawing and with the component parts of the
mounting kit.
Use the required number of
8
claw clamps.
Tighten the claw clamps crosswise in three steps.
Tightening torque: 5, 15, 25 ±2 Nm
Installation of ISO-F
with ISO-F flange
The connection types for installation of ISO-F to ISO-F flange are "hex screw and blind
hole", "stud screw and blind hole" as well as "stud screw and through hole". The following
elements are required:
●
the valid mounting kit of the Pfeiffer Vacuum accessories programme
●
protection screen or splinter shield are optionally
Hexagon screw and blind hole
Mind that the sealing surfaces are not damaged.
Connect the flanges according to the drawing and with the component parts of the
mounting kit.
Use the required number of
12
hex screws with washer.
For a flange material with a strength of > 270 N/mm
2
screw in the hex screw 1.5 d into
the blind hole.
Tighten the hex screws crosswise in three steps.
Tightening torque DN 200: 10, 20, 38 ± 3 Nm
DANGER
Danger to life - impermissible fastening
Twisting or tearing-off is possible in case the rotor is suddenly blocked due to the faste-
ning of pumps on a vacuum chamber with different flange variants.
The combination of different flange types is impermissible in any case.
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.
1.5d
