Core Features
High-precision impurity filtration: An integrated 10 μm glass fiber filter intercepts metal shavings, sealing debris, and other impurities in the return oil, protecting downstream hydraulic components.
High-efficiency oil-gas separation: A centrifugal + baffle composite structure separates air bubbles in the oil (separation efficiency ≥95%), preventing cavitation damage to the main pump/cylinder.
Moisture settling separation: A gravity settling chamber design separates condensate from the oil, which is periodically drained through the bottom drain plug to prevent oil emulsification.
One-way check valve for return oil: An integrated one-way valve prevents backflow of oil from the tank during shutdown, maintaining stable system back pressure.
Clogging alarm trigger: A differential pressure alarm interface is provided; when the filter element becomes clogged, an alarm is triggered in the cab, reminding the operator to replace the filter element.
Product Superiority
Original Factory Precision Match: The housing interface and flow parameters are fully compatible with the D355 return oil circuit, allowing for direct replacement without pipeline modifications; installation is seamless.
Highly Efficient Filtration and Separation: 10 μm glass fiber filter element + composite separation structure, filtration efficiency ≥98%, oil-gas separation efficiency ≥95%, reducing system failures.
Oil-Resistant and Anti-Aging: The housing is made of ADC12 die-cast aluminum alloy, the filter element frame is stainless steel, and the sealing ring is fluororubber, withstanding oil temperatures from -20℃ to 120℃.
Convenient Maintenance: Quick-release filter element holder; filter element replacement does not require pipeline disassembly; differential pressure alarm design reduces the frequency of manual inspections.
Comprehensive System Protection: Integrated filtration, oil-gas separation, moisture sedimentation, and one-way check valve, providing multi-dimensional protection for hydraulic oil cleanliness and system stability.
Installation and Maintenance Points
Before installation, clean the flange face and interface, checking for damage to the sealing ring, filter element, and housing.
Position the filter according to the original markings, and tighten the flange bolts evenly and crosswise (torque 45–50 N·m) to ensure a leak-free seal.
After installation, test the return oil back pressure (0.2–0.3 MPa), checking for leaks and ensuring the differential pressure alarm function is normal.
Replace the filter element every 2000 hours, simultaneously draining the water at the bottom and cleaning the settling chamber.
Regularly check the sealing ring for aging and replace it every 4000 hours to prevent return oil leakage.
Fit scenarios and value
Suitable for: High-contamination-risk hydraulic system operations such as mining stripping, large-scale earthmoving, and long-term continuous operation.
Core Value: Ensures hydraulic oil cleanliness and system stability, extends the lifespan of the main pump, main valve, and cylinders, and reduces hydraulic failure downtime.
