The Moatti 240 series filter elements are engineered for high-performance filtration in medium-speed trunk piston engines. These engines, often found in marine propulsion, power generation, and locomotive applications, face unique lubrication challenges due to the use of heavy fuel oils (HFO) and the constant presence of combustion byproducts.
The Role of Moatti 240 Elements in Trunk Piston Lubrication
In a trunk piston engine, the piston skirt acts as a crosshead, transferring side thrust directly to the cylinder wall. This design allows for a more compact engine but exposes the crankcase oil to contamination from blow-by gases and unburned fuel.
Moatti 240 filter elements provide the continuous, automatic cleaning necessary to maintain oil alkalinity (TBN) and viscosity.
- Removal of Carbonaceous Matter: They effectively capture soot and carbon particles generated during the combustion of heavy fuels.
- Protection of Bearings: By maintaining a high level of fluid cleanliness, these elements prevent abrasive wear on the main bearings, big-end bearings, and camshaft bush.
- Extended Oil Life: Constant back-flushing and high-efficiency filtration reduce the rate of oil degradation, significantly extending the intervals between full oil changes.
Key Applications & Engine Compatibility
Moatti 240 filter elements are the standard for several globally recognized engine series. Their robust stainless steel mesh construction makes them ideal for the following environments:
1. Marine Main Propulsion
Used extensively in coastal vessels, tugs, and medium-sized tankers where reliability is non-negotiable.
- Compatible Engines: Wärtsilä (L20, L26), MAN (L16/24, L21/31), and Yanmar (EY series).
2. Auxiliary Power Generation (Gensets)
On large vessels (VLCCs, Container Ships), trunk piston engines serve as auxiliary units to provide electrical power. Moatti filters ensure these units can run 24/7 on the same heavy fuel as the main engine.
3. Land-Based Power Plants
In remote areas or industrial sites using heavy oil or dual-fuel engines, Moatti 240 elements provide the primary defense against contaminants in stationary power blocks.
Technical Advantages of the 240 Series
- Back-Flushing Technology: The Moatti system utilizes the pressure of the oil itself to perform continuous back-flushing, ensuring the filter mesh never becomes fully blinded.
- High-Grade Stainless Steel Mesh: Unlike paper or fiberglass elements, the 240 series uses high-strength wire mesh (available in 10µm, 15µm, 20µm, and 34µm ratings) that withstands high differential pressures.
- Compact Footprint: Designed for “bolt-on” integration, these elements provide maximum filtration surface area within a minimal physical volume, essential for cramped engine rooms.
Maintenance and Replacement
While Moatti elements are designed for longevity, regular inspection is critical. Signs that an element requires replacement include:
- Increased Pressure Differential: If the pressure drop across the filter remains high even after back-flushing cycles.
- Mechanical Damage: Any deformation or tearing of the stainless steel mesh during ultrasonic cleaning.
- High Particle Count: If oil analysis reports consistently high levels of metallic wear particles despite functional back-flushing.
For optimal engine performance, it is recommended to use elements that meet or exceed the original equipment manufacturer (OEM) specifications for micron rating and flow capacity.
