Aerospace Engine Lube Systems

Research and field experience has established that fluid contamination degrades the performance and life of equipment.

To improve lube component and system reliability and performance, fine filtration is required. For details on filtration solutions for lube systems, contact your local Pall sales representative at

Problems Caused by Contamination

On any powerplant, the lubricant fluid is a repository for particulate contamination. This contamination originates from several sources:
  • Debris built-in during all the processes involved in the manufacture of the engine and its components
  • Wear debris generated during lube system operation
  • Environmental contamination ingressed during normal operation or added during routine servicing and maintenance
  • Products of fluid breakdown
If this contamination is not removed it will recirculate around the fluid system and cause the following problems.

  Aerospace, Defense, and Marine OverviewAerospace ProductsApplications
Air Systems
CBRN Protection
Cabin Air
Engine Protection - Helicopters
Engine Protection - Vehicles
Other Air Systems
Fluid Recycling
Fuel Systems
Hydraulic Systems
Lubrication Systems
Water Treatment/Desalination
Component wear, e.g. fatigue wear on bearings Significantly reduced bearing life
Water Contamination during engine storage Corrosion
High temperature and contaminant Fluid Oxidation and deposit formation, coke formation

Find more details on wear mechanisms.

Benefits of Fine Filtration

Fine filtration removes harmful contaminants from the lubrication system and this will:
  • Improve the operating reliability and performance of the lubrication system
  • Significantly reduce maintenance costs
  • Extend component service life

Typical Filter Locations – Lube System

An aerospace engine oil system (lubrication system) is typically made up of the following components as shown in the schematic below:

The oil pump takes oil from the oil reservoir (lube tank), delivers it under pressure to the oil filter assembly (HP, Pressure filter) and then feeds it to the main engine internal lubrication channels and spray jets. The oil then returns via the scavenge pumps and the oil filter assembly (LP, Scavenge filter), if a filter is fitted, to the main tank.

Filter Solutions

Filtration products include: To determine the best product for your application, contact your local Pall sales representative at

Technical Papers/Field Studies

Johnson,N. and Madhavan, P. (1994) "Fine Filtration for Turbofan Engine Lube Systems", GE Aircraft Engines and Pall Corporation, SAE E-34 Technical Symposium

Koon, K.F, (1984) "Lube System Field Experience on the T700 Engine" Pall Corporation Symposium on Contamination and Wear

Lynch, C. W. and Cooper, R. B.(1971) "The Development of a Three-micron Absolute main Oil Filter for the T53 Gas Turbine" Journal of Lubrication Technology

Madhavan, P. (September 2004) "Filtration Technology for Aircraft Gas Turbine Engine Fuel and Lubrication Systems", Aircraft Technology and Maintenance, 2005 Engine Year Book