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MAN ES Turbocharging

NA-L NA48/L

Turbocharger · Turbochargers

Technical data from manufacturer or class sources · not yet verified by a person​‍​‍⁠⁠​‌⁠‍⁠‌⁠‌⁠‍​⁠‌​

MAN ES Turbocharging NA-L NA48/L — NA-L, 5000 kW max.

Specifications

Technical data.reference — unverified

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Frame SizeNA48/L
Power max (kW)5000
Inspection

Inspector Detail ✓ verified

Common issues

  • Compressor wheel fouling due to poor air filtration
  • Turbine blade erosion from high-temperature exhaust gases
  • Bearing wear and vibration caused by improper lubrication or misalignment
  • Overspeed protection system malfunction
  • Inlet and outlet casing damage from thermal stress
  • Seal failure leading to oil leakage and contamination
  • Control system calibration issues affecting turbocharger performance

Inspection checklist

  • Visual inspection of compressor and turbine blades for damage or fouling
  • Check bearing condition and vibration levels
  • Verify proper lubrication system function and oil quality
  • Inspect inlet and outlet casing for signs of thermal stress or damage
  • Check control system calibration and sensor functionality
  • Verify overspeed protection system operation
  • Inspect seal condition and check for oil leakage
  • Check turbocharger mounting and alignment
  • Verify proper function of inlet and outlet valves

Service intervals

routine_maintenanceevery 2000-4000 operating hours
major_overhaulevery 20000-40000 operating hours or as recommended by manufacturer

Typical wear limits

compressor_wheel10-20% of original blade height
turbine_blades5-10% of original blade height
bearings0.1-0.5 mm of radial clearance

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

  • Compressor wheel
  • Turbine blade set
  • Bearing set
  • Seal kit
  • Control system sensors and actuators
  • Lubrication system components
  • Inlet and outlet valve components

Safety

  • Risk of injury from rotating components or hot surfaces
  • Potential for oil leakage and fire hazard
  • Risk of turbocharger overspeed and catastrophic failure

Class survey

Class surveyor will typically check turbocharger condition, performance, and maintenance records to ensure compliance with classification society rules and regulations

Estimated lifetime: 40000-60000 hours

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