ABB Power2 800-M, Assembly Instructions Manual, Page: 13 / 24

Assembly Instructions / Power2 850-M
4 Installing the low-pressure stage / ​
© Copyright 2019 ABB. All rights reserved. HZTL455311P0010_EN Revision A March 2019
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 Requirements
Fixing elements Plug bolt or screw with washer
Washers under the screw head
or nut Use hardened washers,
thickness
≥ 15% of the nominal thread diameter
Table 7: Fixing elements
The required installation pre-tensioning force for the fixing elements of the low-pressure
stage are defined in table
(see Table 8: Fixing element requirements
→
11) . An appropriate
tightening method must be chosen for assembly.
Subject Power2
850 LP
Thread size M20
Quantity 8
Low-pressure stage foot – clamping length a 70 mm
Clearance in bracket – diameter G n/a
Clearance in bracket – depth I 0 mm
Minimum screw-in depth b 30 mm
Installation pre-tensioning force F
M
190 kN
Tightening torque M
A
(in accordance with VDI 2230, M20, 10.9, μ
G
=0.12)
600 Nm
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) in accordance with
VDI2230.
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