How to select a suitable HYDAC high-pressure filter?

Complete Selection Guide for HYDAC High-pressure Filters

Select HYDAC high-pressure filters accurately in five steps: system pressure, flow rate, filtration accuracy, structural type, and material configuration, fully applicable to DF, DFM, DFDK and other series, suitable for industrial high-pressure working conditions.

1. Confirm System Working Pressure

The rated pressure of the filter must be no less than the maximum instantaneous system pressure; overpressure operation is strictly prohibited.

Common pressure grades:

210 bar: Machine tools and light-duty hydraulic stations

315 bar: Construction machinery and general heavy-duty equipment

420 bar: Shield machines, mining equipment and servo systems

For working conditions with pressure impact, prioritize thickened high-pressure DFON series.

2. Match System Flow Rate

Select according to the peak flow rate with a margin of 1.2~1.5 times.

Insufficient flow will cause high pressure difference and rapid filter blockage.

Excessive flow leads to cost and space waste.

DFDK double-barrel type is recommended for non-stop continuous production.

3. Determine Filtration Accuracy

Servo valves & proportional valves: 1~5 μm glass fiber filter element

Ordinary solenoid valves & piston pumps: 10 μm standard accuracy

Gear pumps & general oil circuits: 25~50 μm coarse filtration

Add pre-filtering for harsh environments to extend service life.