ISO 3724:2007 PDF

Name: ISO 3724:2007 — Hydraulic fluid power — Filter elements — Determination of resistance to flow fatigue using particulate contaminant
SKU: ISO 3724:2007
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Hydraulic fluid power — Filter elements — Determination of resistance to flow fatigue using particulate contaminant

Название (английский):

ISO 3724:2007

Hydraulic fluid power — Filter elements — Determination of resistance to flow fatigue using particulate contaminant

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 12
Дата публикации:: 6 августа 2007 г.
Издание:: ISO IS 3724 edition 2 version 1
ICS:: 23.100.60

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Описание (английский):

ISO 3724:2007 specifies a method for determining the resistance of a hydraulic filter element to flow fatigue after it has been loaded with particulate contaminant and subjected to a uniform varying flow rate and predetermined terminal differential pressure. It establishes a uniform method for verifying the ability of a filter element to withstand the flexing caused by cyclic differential pressures induced by a variable flow rate.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 3724:2007 - "Hydraulic fluid power - Filter elements - Determination of resistance to flow fatigue using particulate contaminant" - specifies a laboratory method to verify a hydraulic filter element’s ability to resist structural damage from cyclic flow-induced differential pressures. The standard defines how to load an element with particulate contaminant, apply a controlled varying flow-rate waveform, and confirm continued structural integrity by a collapse/burst test.

Key topics and technical requirements

Purpose: Determine filter element resistance to flow fatigue caused by cyclic differential pressures under variable flow rates.

Pre-tests: Elements must first pass fabrication integrity (bubble point) testing in accordance with ISO 2942.

Test fluid and contaminant: Compatible hydraulic fluid with viscosity between 14 mm²/s and 32 mm²/s at test temperature; inert particulate contaminant (ISO 12103-1 test dust is suitable).

Flow fatigue waveform: Cycle from 0 l/min to a flow between 25 % and 100 % of rated flow and back to 0, following the differential-pressure-versus-time waveform defined in the standard (timing fractions of the cycle are specified).

Cycle rate and tolerances: Cycle frequency selected from 0.2 Hz to 1 Hz, maintained within ±10%. Measurement accuracies and allowed variations (example): flow rate ±2% reading / ±10% condition; differential pressure ±2% / ±10%; temperature ±1 °C / ±3 °C.

Loading procedure: Add particulate contaminant until the maximum assembly differential pressure (housing + maximum element ∆pE as designated by manufacturer) is reached; contaminant may be added during cycling to maintain pressure.

End-of-test verification: After the required number of cycles, perform collapse/burst testing per ISO 2941 (bubble-point prior to collapse/burst is not required). Acceptance requires passing the collapse/burst criteria.

Reporting: Test data, plots (differential-pressure vs. time and housing ∆p vs. flow), cycle count, contaminant used, and collapse/burst results must be presented in the prescribed format.

Applications and users

Filter manufacturers - to validate design robustness and claim conformity.

Independent test laboratories - for standardized performance testing and certification.

Hydraulic system designers and OEMs - to specify reliable filtration components for mobile or industrial hydraulic systems.

Quality assurance / procurement teams - to verify supplier test claims and ensure filter durability under variable-flow conditions.

Practical benefits include improved reliability of hydraulic systems, reduced filter failure risk under fluctuating flow, and clear test evidence for product specifications.

Related standards

ISO 2941 - Collapse/burst verification of filter elements

ISO 2942 - Fabrication integrity and first bubble point

ISO 2943 - Material compatibility with fluids

ISO 1219‑1 / ISO 1219‑2 - Graphic symbols and circuit diagrams

ISO 5598 - Fluid power vocabulary

ISO 12103‑1 - Recommended test dust (particulate contaminant)

Use the identification statement in reports: “Method of determining filter element resistance to flow fatigue using particulate contaminant conforms to ISO 3724:2007.”

ISO 3724:2007 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

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