Close-up of the Wärtsilä 20DF engine
Wärtsilä Lube oil bypass filter unit

Superior filtration for 4-Stroke engines

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Maximize engine performance with advanced oil filtration technology

The Wärtsilä Lube oil bypass filter unit delivers exceptional particle removal efficiency for marine and energy applications, extending engine life while reducing operational costs and environmental impact.

High-performance filtration for today's engine requirements

As the maritime industry transitions away from residual fuels in response to stricter emission regulations, cost-effective solutions are essential for maintaining operational excellence. The Wärtsilä Lube oil bypass filter unit represents a significant advancement in lubrication management technology, offering superior filtration performance without the high operational costs of traditional separators.

With an impressive 99.5% separation rate for particles ≥10 µm, this OEM-validated solution ensures optimal oil cleanliness levels for your critical engine systems, protecting your valuable assets and enhancing reliability across your fleet.

Key benefits that impact your bottom line

Exceptional Performance

  • 99.5% separation efficiency for particles ≥10 µm
  • Maintains superior oil cleanliness levels
  • Ensures safe and reliable engine operation

Significant cost savings

  • 100% electricity savings with no power supply required
  • ROI in less than a year
  • Substantial reduction in maintenance costs

Environmental impact

  • Reduce CO2 emissions by up to 20 tons annually
  • Support sustainability initiatives
  • Minimize environmental footprint

Simplified maintenance

  • Minimal spare parts required
  • Easy filter element replacement
  • Reduced technical expertise needed for maintenance

Space optimization

  • Compact design requires less engine room space
  • Simplified installation
  • Ideal for both retrofits and new builds

Compatible with multiple engine types

The Wärtsilä Lube oil bypass filter unit is specifically designed and field-tested for all dual-fuel (DF) engines and diesel-operated engines:
W20, W25, W26, W31, W32, WV32, W34, W38, W46, W46F, W46TS, W50, W64, Sulzer 40.

Ideal for both marine vessels and power plants seeking to optimize performance while reducing operational expenses.

Technical excellence by design

The bypass filtration system draws oil at a flow rate of 1.0-6 m³/h from the engine-driven main lubrication oil pump. The oil is taken from the pump outlet and returned to the engine oil sump via a separator connection, creating an efficient cleaning loop that continuously improves oil quality.

We offer three different sizes of filter units, suitable for various engine capacities based on the lube oil volume requirements:
Filter Unit Sizes:

  • Size 1: Contains 1 element, supports up to 20 m³ of oil volume.
  • Size 2: Contains 3 elements, supports up to 30 m³ of oil volume.
  • Size 3: Contains 6 elements, supports up to 60 m³ of oil volume.

Filtration Specification:

  • The filtration rate is 9 µm (β9=75 standard).
  • The filter element lifetime is up to 1500 hours.
 
Wärtsilä Lube oil bypass filter unit
Wärtsilä Lube oil bypass filter unit

Advanced monitoring features

  • Differential pressure indicator
  • Possible integration with engine automation systems (WDCU / Expert Insight)
  • Alarm notification at 3 bar differential pressure
  • Sampling valves for oil quality verification
  • Strategic valve placement for maintenance access

Complete installation kits can include the following components

  • Seamless steel pipes
  • Fittings and flexible hoses

Comprehensive delivery scope

Standard package includes:

  • Filter unit with high-efficiency filter media
  • Engine connection pipes and/or flexible hoses
  • Inlet and outlet closing valves
  • Flow restrictor
  • Filter connections with G1 thread counter flanges

    Optional enhancements:

    • Water content sensor for enhanced oil quality monitoring
    • Integrated trip tray for environmental protection 
    • Professional installation and commissioning services
    • Customized maintenance packages

      Recommendations:

      • Safety parts such as filter elements depending on the unit/installation

      Act Now to optimize your engine performance

      Ready to reduce costs and improve engine reliability? Contact our technical specialists today for a personalized assessment of how the Wärtsilä Lube Oil Bypass Filter Unit can benefit your specific operation.

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