Supplying friction points with contaminated lubricant results in shorter operating lives, premature failures and faster lubricant aging. Lubricants can be contaminated during the production process, or also later. Non-lubricants, oil-insoluble solid particles and the lubricant's own aging products are all sources of contamination. Sufficient filtering considerably prolongs the service life of the machine, its bearings and other friction points.

The main selection criteria:

  • nominal flow [l/min], pressure drop (dependent on volume and viscosity)
  • operating pressure [MPa]
  • filter mesh size, filtration ratio, ACFTD capacity
  • temperature range
  • supplementary equipment such as: visual dirt indicator, electronic dirt indicator, bypass valves
  • materials for housings, seals, filter material

Filters used in centralized lubrication systems:

  • standard filters (according DIN 24550)
  • suction filters / strainers
  • pressure filters (in the main and by-pass flows)
  • reverse-flow filters
  • breather filters are used for reservoirs
  • screen filters
  • disk filters 
When positioning filters on the reservoir or in the system, make sure that they are easily accessible and that filter elements can be easily exchanged. Tubing used in centralized lubrication systems should be cleaned (flushed) internally prior to assembly.

Technical features:

  • Compatibility with fluids: oil, greases up to NLGI grade 00
  • Ambient temperature: -30 to +100 °C
  • Pressure: up to 100 bar
  • Volumetric flow: 40 - 100 l

Special features:

  • Fiberglass fleece – inorganic fiber – absolute filtration
  • Wire fabric – stainless steel – nominal filtration

Related documents

SKF logo