Operation Manual / Power2 850-M / 4.2 High-pressure stage
3 Expected replacement intervals /
© Copyright 2017 ABB. All rights reserved. HZTL4063_EN Revision A August 2017
3 Expected replacement intervals
Rotating components
The recommended replacement intervals for compressor and turbine wheels are specified
based on the safety concept for rotating parts (SIKO) and dependant on the operating con-
ditions. These intervals are shown on the rating plate of the low-pressure and high-pressure
stage.
Non-rotating components
Depending on the system-specific operating conditions, a differentiation must be made
between the intervals to be expected for:
¡ replacing the bearing parts and
¡ replacing the non-rotating components exposed to hot gas.
A decisive role is played by various influencing parameters which, in extreme cases, can
drastically reduce the replacement interval of these parts.
During the prescribed periodic service work, the individual parts are examined for wear and
replaced if necessary.
Expected replacement intervals [h]
GAS / MDO HFO
Gas inlet casing 50000 … 100000 25000 … 50000
Gas outlet casing 50000 … 100000 25000 … 100000
Nozzle ring 35000 … 50000 25000 … 50000
Turbine diffuser / cover ring 35000 … 50000 25000 … 50000
Other casings 100000 100000
Rotor components See rating plate information
Bearing parts See rating plate information
Turbine blades
(due to wear)
- - ≥ 12000
Table4: Expected replacement intervals [h]
GAS = Gas
MDO = Marine Diesel Oil
HFO = Heavy Fuel Oil
The specified values are guideline values and are not guaranteed, see influencing paramet-
ers.
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