Liugong SP227518C1 Oil-Water Separation Filter Element: The "Pure Guardian" for Construction Machinery Engines

1. Three-layer composite filter material achieves micron-level precision filtration

Tiny impurities in diesel fuel—such as rust, dust, and carbon particles—are the culprits behind engine fuel injection system issues. “ The Invisible Killer ” , LiuGong SP227518C1 The oil-water separation filter element utilizes “ Pre-filter pre-stage +  High-precision filtration layer +  Supporting Protective Layer ”  A three-layer composite filter structure thoroughly addresses the challenge of impurity filtration: The pre-filter layer, made from high-density polyester fibers, can initially trap particles as small as ≥10μm Large-particle impurities are removed to reduce the load on subsequent filter layers; the intermediate high-precision filter layer is made of imported glass fibers, achieving a filtration accuracy of 3μm , the filtration efficiency for minute impurities in diesel ≥99.8% , it can precisely capture the minute particles that precision components like fuel injectors and fuel pumps fear most, preventing reduced injection accuracy or component jamming caused by impurity-induced wear; the outer support protective layer is made from high-strength nylon mesh, which not only enhances the filter material's overall compression resistance (withstanding pressures up to 1.2MPa ), it can also prevent the filter material from deforming under diesel pressure, ensuring long-term stability of filtration performance. Tests have shown that after using this filter element, the residual impurities in the engine's fuel system are significantly lower compared to those found in conventional industry filters. 60% Above, the lifespan of the fuel injectors is extended. 50%。

II. Efficient demulsification and separation, swiftly removing water from diesel

Construction machinery often operates outdoors, where diesel fuel can easily absorb moisture due to condensation or improper storage. This moisture can lead to diesel oxidation and degradation, corrosion of engine components, and even cause ice blockages in the fuel system. Liugong SP227518C1 Innovatively equipped with an oil-water separation filter element “ Hydrophilic Demulsification Coating +  Flow-guiding separation chamber ”  Design significantly enhances oil-water separation efficiency: The filter material surface is coated with a specialized hydrophilic demulsification layer, which rapidly breaks down the oil-in-water emulsion in diesel, causing tiny water droplets to coalesce into larger ones. Meanwhile, the filter element features a spiral-shaped flow-guiding separation chamber; as diesel flows through, it creates a swirling motion that leverages centrifugal force to fling the aggregated water droplets toward the chamber walls, where they are then discharged via the bottom drain valve, achieving seamless separation. “ Filtering is separation. ”  The synchronization effect. Data shows that this filter cartridge achieves high efficiency in separating water from diesel fuel. ≥95% , even if the diesel fuel contains up to 0.5% , and can also in 10  Reduce the moisture content to within minutes 0.01% The following are significantly below the national standard requirements. 0.03% , effectively preventing moisture from eroding the engine.

3. High-strength structural design to withstand harsh operating environments

Construction machinery operation scenarios are complex, requiring filter elements to withstand multiple challenges such as vibration, high temperatures, and oil contamination. LiuGong SP227518C1 The oil-water separation filter cartridge features a structurally designed, durable build: the cartridge housing is made from enhanced polypropylene material and is formed via integrated injection molding, delivering impact resistance that reaches 15 kJ/m² , it can withstand collision impacts during equipment jolts, preventing the casing from cracking and oil leakage; the bonding area between the filter material and the casing is sealed with high-temperature hot-melt adhesive, achieving a sealing strength that reaches 500N , and can - 30℃ To 120℃ It maintains sealing performance even in extreme temperature conditions, preventing unfiltered diesel from bypassing the system. Additionally, the top of the filter element features a non-slip knob-style end cap, with a textured surface that has undergone anti-slip treatment. This ensures easy assembly and disassembly by maintenance personnel—even in oily or wet environments—eliminating the need for specialized tools and significantly enhancing the convenience of replacement.

4. Long-lasting durability reduces users' maintenance costs.

Frequently replacing filter cartridges not only increases maintenance time but also drives up equipment operating costs. LiuGong SP227518C1 The oil-water separation filter cartridge significantly extends its service life by optimizing the dust-holding capacity of the filter material and enhancing its anti-clogging performance: the three-layer composite filter material boasts an impressive dust-holding capacity. 15g , is a standard filter cartridge 1.8  Double the capacity—able to accommodate more impurities without compromising flow; meanwhile, the filter material features an anti-clogging treatment process, ensuring that diesel flow resistance remains consistently low. 0.02 MPa Below, avoid fuel supply shortages or engine power loss caused by filter clogging. Depending on the operating environment, this filter element can maintain its normal service life up to 200–300 Hours, extended compared to standard industry filters 30% Above, this reduces the frequency of replacements. Additionally, a transparent water-accumulation window is installed at the bottom of the filter cartridge, allowing users to visually monitor the water level and drain it as needed—eliminating the need for frequent disassembly and inspection, thereby further minimizing maintenance effort and time costs.

5. Compatible with All Models, Safeguarding Diverse Power Systems

Leveraging LiuGong's deep understanding of construction machinery fuel systems, SP227518C1 The oil-water separation filter element features a standardized interface design, seamlessly fitting the fuel filtration systems of LiuGong's entire range of loaders, excavators, road rollers, and other equipment. It is also compatible with the fuel line specifications of mainstream engine brands such as Yuchai, Weichai, and Cummins. The filter element’s installation dimensions strictly adhere to industry standards, with interface thread precision reaching 6H The unit features an NBR rubber sealing ring that perfectly matches the sealing surface of the fuel filter housing, ensuring no leakage concerns after installation. Additionally, the filter element’s surface clearly displays information such as compatible机型 (machine models) and recommended replacement intervals, making it easy for users to quickly identify and select the right product. Whether installing on a new machine or replacing in an existing one, this solution ensures seamless compatibility, providing a standardized fuel purification solution for construction machinery across various brands and models.

6. Rigorous quality control verification ensures stable filtration performance.

Liugong vs. SP227518C1 The oil-water separation filter cartridge implements full-process quality control: During the raw materials stage, components such as filter media and housings undergo compositional analysis, filtration efficiency testing, and temperature resistance testing to ensure the quality of the base material. In the production process, each filter cartridge must pass an air-tightness test (leakage rate < ≤0.1 L/min )、Flow testing (pressure loss at rated flow rate ≤0.05 MPa ), ensuring that the filtration performance meets the standards; before products leave the factory, filter cartridges are randomly selected for life simulation tests and extreme environmental adaptability tests, guaranteeing that every cartridge shipped complies with “ Zero defects ”  Standards. Meanwhile, LiuGong has established a comprehensive quality traceability system, enabling users to check production batches and inspection data via the filter cartridge code, thereby fully safeguarding their rights and benefits.

Liugong SP227518C1 The oil-water separation filter element, centered on high-precision filtration, efficient dehydration, and long-lasting durability, has become essential for construction machinery engines. “ Pure Guardian ” Choosing it means not only selecting a high-quality filter element, but also opting for long-lasting engine protection and ensuring stable equipment operation—helping your construction machinery stay free from fuel impurities and moisture in various environments such as mines, infrastructure projects, and agricultural fields, thereby maintaining robust power at all times and unlocking greater engineering value.