Turbocharger · Turbochargers
The Napier NA455 (frame 455S) is a high‑capacity turbocharger designed for two‑stroke slow‑speed marine diesel engines, delivering up to 30 MW of boost power.
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| routine_maintenance | every 2000-4000 hours |
|---|---|
| major_overhaul | every 20000-30000 hours or as recommended by manufacturer |
| bearing_replacement | every 10000-15000 hours or as needed |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| compressor_blades | 10-20% of original blade length |
|---|---|
| turbine_blades | 5-15% of original blade length |
| bearings | 0.1-0.5 mm of radial clearance |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyor will typically check turbocharger performance, vibration levels, and condition of compressor and turbine blades, as well as verify proper function of overspeed trip and governor systems
Estimated lifetime: 40000-60000 hours
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