REVIEW: The hydraulic oil filter products or accuracy of the certificate marked on the label is the name of accuracy, rather than absolute filtering accuracy, that only experimental tests of value to indicate the filter filtering capabilities. To verify that the import substitution filter performance is good or bad, can be drawn from the following indicators: 1, filtration precision: determined by stains cleanliness level required of the hydraulic system, in accordance with this clean ...

     Hydraulic oil filter products or accuracy of the certificate marked on the label is the name of accuracy, rather than absolute filtering accuracy, and only after the experiment to test the value of β indicates the filter filtering capabilities. To verify that the import substitution filter performance is good or bad, it can be drawn from the following indicators:

1. Filtration:

      Determined by stains cleanliness class in Schedule selection filter precision filter according to this cleanliness level required of the hydraulic system.

     Commonly used hydraulic oil filter nominal filter engineering machinery cleanliness 10μm

     Hydraulic Oil Cleanliness (ISO4406) nominal filter accuracy μm filter Applications

13/10 3 hydraulic servo valve

16/13 5 hydraulic proportional valve

18/15 10 General hydraulic components (> 10Mpa)

19/16 20 general hydraulic components (<10Mpa)

          The maximum diameter of hard spherical particles under the experimental conditions specified by the filter as its absolute filtration accuracy, the ability to directly reflect the newly installed filter cartridge early.

   According ISO4527-1981E (multiple experiments) β value measured, that allow standard test powder mixed with oil when assessing the most important standard hydraulic oil filter oil filter through multiple cycles, the oil inlet and outlet ports on both sides the ratio of the number of particles.

2. Flow characteristics:

        Filter through the oil flow and pressure drop flow characteristics is an important parameter, according ISO3968-91 standard test flow characteristics, to draw the flow - pressure drop characteristic curve at rated supply pressure, total pressure drop (filter housing and pressure drop of the filter) should normally be 0.2Mpa or less.

3. Filter strength:

     Shall be broken in accordance with standard ISO2941-83 - impact test, a sharp decline when the filter is damaged pressure difference should be greater than a predetermined value.

4. Flow fatigue characteristics:

     Fatigue test should be carried out in accordance with 100,000 cycles ISO3724-90 standards.

5. The hydraulic oil adaptive experiments:

Should pressure flow endurance test in accordance with ISO2943-83 standards.