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Assembly Instructions / Power2 850-M
4 Installing the low-pressure stage /
4
Installing the low-pressure stage
Fixing elements and installation forces
The fixing screws for fastening the low-pressure stage are not included in the ABB Turbo
Systems scope of delivery and must be designed by the enginebuilder in accordance with
the following details.
Fig. 4: Fixing elements
Subject
Fixing elements
Washers under the screw head
or nut
Table 7: Fixing elements
The required installation pre-tensioning force for the fixing elements of the low-pressure
stage are defined in table
tightening method must be chosen for assembly.
Subject
Thread size
Quantity
Low-pressure stage foot – clamping length a
Clearance in bracket – diameter G
Clearance in bracket – depth I
Minimum screw-in depth b
Installation pre-tensioning force F
Tightening torque M
A
(in accordance with VDI 2230, M20, 10.9, μ
Table 8: Fixing element requirements
For the case of the torque-controlled tightening method, an appropriate tightening torque
is defined in table
(see Table 8: Fixing element requirements →11)
VDI2230.
© Copyright 2019 ABB. All rights reserved.
Requirements
Plug bolt or screw with washer
Use hardened washers,
thickness ≥ 15% of the nominal thread diameter
(see Table 8: Fixing element requirements
M
=0.12)
G
HZTL455311P0010_EN
→11). An appropriate
Power2
850 LP
M20
8
70 mm
n/a
0 mm
30 mm
190 kN
600 Nm
in accordance with
Revision A
March 2019
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