5.2.7 Attaching ISO-K flange onto ISO-K
ISO flange connections
For the connection of flanges in ISO-KF or ISO-K design, twisting may occur in the event of
sudden blockage of the rotor, despite correct installation.
● Leak-tightness of the flange connection, however, is not jeopardized in this regard.
Required tools
● Wrench, WAF 15
● Calibrated torque wrench (Tightening factor ≤ 1.6)
Fig. 6:
Flange connection ISO-K to ISO-F, bracket screws
Connection with bracket screw
1. For the connection of the turbopump, use only the approved mounting kits from Pfeiffer Vacuum.
2. Connect the flange with the components of the mounting kit according to the figure.
3. Use for all prescribed components for the turbopump.
4. Tighten the bracket screws cross-wise in 3 steps.
– Tightening torque:
5, 15, 25 ± 2 Nm
5.2.8 Installation of ISO-K flange onto ISO-F
The connection types for the installation of ISO-K with ISO-F flange are:
● "Claw and tapped hole"
● "Hexagon head set screw and tapped hole"
● "Stud screw and tapped hole"
● "Stud screw and through-bore"
ISO flange connections
For the connection of flanges in ISO-KF or ISO-K design, twisting may occur in the event of
sudden blockage of the rotor, despite correct installation.
● Leak-tightness of the flange connection, however, is not jeopardized in this regard.
Connection of claw and tapped hole
1. Only use the approved mounting kits from Pfeiffer Vacuum for the connection.
2. Connect the flange according to the diagram using the components in the mounting kit.
3. Utilize all prescribed components for the turbopump.
4. Tighten the claws in 3 stages in opposite pairs.
– Tightening torque:
5, 10, 16 ± 1 Nm
Installation
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