GB/T 38175-2019Hydraulic fluid power - Filter elements - Determination of resistance to flow fatigue using high viscosity fluid (English PDF)

1 Scope

This standard specifies a test method for determining the fatigue resistance of hydraulic filter elements using high viscosity liquids. Make the pressure difference generated by the filter element

The control waveform reaches a predetermined maximum differential pressure and the filter element is tested for flow fatigue tolerance under consistent periodic flow changes.

The method established by this standard is used to test the ability of the filter element to withstand the damage caused by the alternating pressure difference caused by the periodic flow changes in the system.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

ISO 1219-1 Fluid transmission systems and components - Graphical symbols and circuit diagrams - Part 1. General use and data processing

Graphical symbols (Fluidpowersystemsandcomponents-Graphicsymbolsandcircuitdiagrams-Part 1.

Graphicsymbolsforconventionaluseanddata-processingapplications)

ISO 1219-2 Fluid transmission systems and components - Graphical symbols and diagrams - Part 2. Circuit diagrams (Fluid powersystems andcomponents-Graphicsymbolsandcircuitdiagrams-Part 2.Circuitdiagrams)

ISO 2941 Hydraulic Transmission Filters for Resistance to Cracking (Fracture) Characteristics (Hydraulicfluidpower-Filterele- ments-Verificationofcolapse/burstpressurerating)

ISO 2942 Hydraulic Drive Filter Structural Integrity Verification and Initial Bubbling Point Determination (Hydraulicfluidpower-

Filterelements-Verificationoffabricationintegrityanddeterminationofthefirstbubblepoint)

ISO 2943 Hydraulic fluid filter material and liquid compatibility test method (Hydraulicfluidpower-Filterele- ments-Verificationofmaterialcompatibilitywithfluids)

ISO 3448 Industrial Liquid Lubricants ISO Viscosity Classification (Industrialliquidlubricants-ISO viscosityclassifica-

Tion)

ISO 4406 Hydraulic Transmission Fluid Solid Particle Pollution Rating Code Method (Hydraulicfluidpower-Fluids-Method

Forcodingthelevelofcontaminationbysolidparticles)

ISO 5598 Fluid Power System and Component Vocabulary (Fluidpowersystemsandcomponents-Vocabulary)

3 Terms and definitions

The following terms and definitions defined by ISO 5598 apply to this document.