5.4.7 Fastening CF flange to CF-F
The connection types for CF installation with CF flange are:
● "Hexagon head screw and through hole"
● "Stud screw with tapped hole"
● "Stud screw with through hole"
NOTICE
Leaks may occur due to the incorrect installation of CF flanges
Inadequate cleanliness when handling CF flanges and copper gaskets results in leaks and may
cause process damage.
► Always wear suitable gloves before touching or fitting any components.
► Fit seals only if dry and free of grease.
► Take care of damaged surfaces and cut edges.
► Replace the damaged components.
Required tools
● Hexagonal wrench (13 WAF)
● Calibrated torque wrench (tightening factor ≤ 1.6)
Fig. 9:
Flange connection CF-F, hexagon head screw and through hole
Connection of the hexagon head screw and through holes
1. For the connection of the turbopump, use only the approved mounting kits from Pfeiffer Vacuum.
2. If used: Insert the protective screen or splinter shield with clamping lugs downwards in the turbo-
pump high vacuum flange.
3. Place the seal exactly in the hollow.
4. Connect the flange with the components of the mounting kit according to the figure.
5. Tighten the screw couplings all the way around.
– Tightening torque:
22 ± 2 Nm
6. Then check the torque, since flowing of the sealing material may make it necessary to re-tighten
the screws.
Fig. 10:
Flange connection CF-F, stud screw and tapped hole
Connection of the stud screw and tapped hole
1. For the connection of the turbopump, use only the approved mounting kits from Pfeiffer Vacuum.
2. Screw in the required number of stud screws with the shorter end in the holes on the counter
flange.
3. If used: Insert the protective screen or splinter shield with clamping lugs downwards in the turbo-
pump high vacuum flange.
4. Place the seal exactly in the hollow.
5. Connect the flange with the components of the mounting kit according to the figure.
6. Tighten the screw couplings all the way around.
Installation
26/60
