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MAN ES Turbocharging

NA-LV NA48-LV

Turbocharger · Turbochargers

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

MAN ES Turbocharging NA-LV NA48-LV — NA-LV, 5500 kW max.

Specifications

Technical data.reference — unverified

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Frame SizeNA48-LV
Power max (kW)5500
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 misalignment or imbalance
  • Overspeed protection system malfunction
  • Lubrication oil contamination or leakage
  • Cooling system blockages or leaks
  • Vibration damper failure

Inspection checklist

  • Compressor and turbine blade condition
  • Bearing housing and lubrication system
  • Overspeed protection system function
  • Cooling system performance and leaks
  • Vibration damper and mounting condition
  • Lubrication oil quality and level
  • Air filter condition and cleanliness
  • Exhaust gas temperature and pressure
  • Turbocharger shaft and seal condition

Service intervals

compressor blade cleaningevery 2000-4000 hours
turbine blade inspectionevery 4000-6000 hours
bearing replacementevery 12000-18000 hours
vibration damper replacementevery 8000-12000 hours

Typical wear limits

compressor blade tip clearance1.5-2.5 mm
turbine blade tip clearance2.0-3.5 mm
bearing vibrationless than 5 mm/s
shaft seal leakageless than 10 liters per hour

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

Critical spares

  • Compressor and turbine blades
  • Bearing sets
  • Vibration damper
  • Overspeed protection system components
  • Lubrication oil pumps and filters
  • Cooling system hoses and seals
  • Turbocharger shaft seals

Safety

  • High-temperature exhaust gases and surfaces
  • Rotating machinery and entanglement hazards
  • Electrical and control system safety
  • Compressed air and gas leaks

Class survey

Verify turbocharger performance, vibration, and temperature levels, and inspect for signs of wear, leakage, or damage. Check compliance with manufacturer's maintenance and inspection recommendations.

Estimated lifetime: 30000-40000 hours before major overhaul

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