Operation Manual / Power2 850-M / 4 Product description
6 Periodic maintenance / 6.3 Cleaning turbine and nozzle ring during
operation
© Copyright 2019 ABB. All rights reserved.
HZTL4061_EN
Rev.B
June 2019
2. Cleaning the high-pressure turbine stage (HP stage)
u
If present, open the drain pipe in the low-pressure stage during cleaning.
u
Switch the 3-way valve during cleaning from scavenging air to water supply.
u
Carry out the cleaning process with cleaning parameters according to the specifications
in the following table.
Power2
Water flow rate
[l/min]
Water pressure
(guideline value)
[bar]
Duration of water injection
[min]
850 HP
20.0 ±1.0
3.0
10
Table 11: Cleaning parameters HP
Water flow rate
For an optimum cleaning result, the water flow rate adopted when designing the cleaning
process should be set via the corresponding control valves and monitored by a flowmeter. If
this is not possible, the specified water pressure at the cleaning connection of the tur-
bocharger is to be set as a rough approximation.
3. Cleaning the low-pressure turbine stage (LP stage)
u
If present, open the drain pipe in the low-pressure stage during cleaning.
u
Switch the 3-way valve during cleaning from scavenging air to water supply.
u
Carry out the cleaning process with cleaning parameters according to the specifications
in the following table.
Power2
Water flow rate
[l/min]
Water pressure
(guideline value)
[bar]
Duration of water injection
[min]
850 LP
20.0 ±1.0
1.5
10
Table 12: Cleaning parameters LP
Water flow rate
For an optimum cleaning result, the water flow rate adopted when designing the cleaning
process should be set via the corresponding control valves and monitored by a flowmeter. If
this is not possible, the specified water pressure at the cleaning connection of the tur-
bocharger is to be set as a rough approximation.
4. Drying phase
u
Maintenance of the holding time according to the specifications in the following table
and subsequent adjustment of the desired engine operating point.
Power2
Holding time at reduced load
[min]
850
≥
10
Table 13: Holding time
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