ABB HT611036 - Cleaning Components Mechanically; Table 16: Wet Cleaning of Turbines, Parameters for 6-Nozzle Cleaning

Operation Manual / A150-M56/66/57/67 - A155-M..
7 Periodic maintenance work / 7.4 Cleaning components mechanically
© Copyright 2022 ABB. All rights reserved. HZTL4032_EN Rev.S February 2022
Parameter for 6-nozzle cleaning
Product Temperature be-
fore turbine before
cleaning [°C]
Maximum temperature
before turbine during
cleaning [°C]
Water volume flow
V
W
[dm
3
/min]
1)
Injection time
[min]
A150 350 ... 430 530 18.0 10
A155 350 ... 430 530 25.0 10
Table16: Wet cleaning of turbines, parameters for 6-nozzle cleaning
1)
Corresponds to a water pressure p
WT
of 2.5bar (overpressure compared to atmosphere) at
the connection point WA/WG
7.4 Cleaning components mechanically
7.4.1 Preparation
CAUTION
Component damage and corrosion
If mechanical cleaning is carried out incorrectly, this can lead to damage and
corrosion on the components.
u Pay attention to the specifications in this chapter pertaining to mechan-
ical cleaning.
CAUTION
Selection of cleaning tools
Turbocharger components are sensitive and easily sustain mechanical dam-
age. The use of needle descalers (for example) or other striking tools dam-
ages the components. Depending on the specification, nozzle rings or tur-
bine casings may have protective coatings which can also be damaged.
u Use only soft tools such as rags, brushes or wire brushes.
u In case of heavy contamination, the cleaning methods described in this
chapter (such as soaking, for example) can be repeated until a satisfact-
ory result is achieved.
The disassembly and assembly of the components is described in chapter Fitting and dis-
mantling.
u Contaminated water and cleaning agents must be disposed of in an environmentally
compatible, professional way and in compliance with locally applicable regulations.
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