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How to design a reasonable hydraulic system filtration solution?

2025-04-28

A reasonable filtering scheme should consider the following factors: A coarse filter (100-180μm) is set at the suction port of the axial piston pump to protect the pump without increasing the oil suction resistance. A fine filter (β₃≥200, corresponding to a filtration accuracy of about 10μm) is set on the high-pressure pipeline to protect precision valves. A medium-precision filter (25-40μm) is set on the return oil pipeline to capture pollutants generated by the system. For servo systems, an offline circulation filtration system can be added to keep the oil cleanliness below NAS level 6. The filter element selection should consider the pressure difference characteristics, dirt holding capacity and material compatibility, and should be replaced regularly (usually when the pressure difference exceeds 0.3bar). A temporary high-precision filter device (3-5μm) should be used when flushing the system, and the normal operating filter element should be replaced after the target cleanliness is reached. Note that the pressure rating of the filter housing should be higher than the maximum pressure of the system to avoid rupture.

Rexroth Piston Pump

Rexroth Piston Motor

Rexroth Axial Piston Pump

Rexroth Axial Piston Motor

Hydraulic Axial Piston Pump

Construction Machinery Piston Pump

Construction Machinery Piston Motor

Industrial Machinery Piston Pump

Agricultural Axial Piston Motor

Harvesting Machinery Piston Pump

Harvester Axial Piston Motor

Bent Axis Piston Motor

Variable Axial Piston Pump

Fixed Displacement Piston Motor

Hydropower Plant Hydraulic Cylinder

Water Conservancy Hydraulic Cylinder

Rexroth Piston Pump

Rexroth Piston Motor

Rexroth Axial Piston Pump

Rexroth Axial Piston Motor

Hydraulic Axial Piston Pump

Construction Machinery Piston Pump

Construction Machinery Piston Motor

Industrial Machinery Piston Pump

Agricultural Axial Piston Motor

Harvesting Machinery Piston Pump

Harvester Axial Piston Motor

Bent Axis Piston Motor

Variable Axial Piston Pump

Fixed Displacement Piston Motor

Hydropower Plant Hydraulic Cylinder

Water Conservancy Hydraulic Cylinder

How to design a reasonable hydraulic system filtration solution?

How to design a reasonable hydraulic system filtration solution?