BS ISO 2941:2009 Hydraulic fluid power. Filter elements. Verification of collapse/burst pressure rating
In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit.
Filters maintain the cleanliness of fluid in a fluid power system by removing insoluble contaminants. A filter element is the porous device that performs the actual process of filtration. The capability of the filter element to maintain a specified fluid cleanliness level depends on its performance and structural integrity and its ability to withstand non-steady-state conditions (e.g. cold starts and decompression surges). The filter element’s resistance to collapse or burst is a measure of its ability to withstand such effects.
BS ISO 2941 specifies a method for verifying the collapse/burst pressure rating of a hydraulic fluid power filter element, i.e. the capability of a filter element to withstand a designated differential pressure at the normal (i.e., intended direction of) flow, by means of pumping contaminated fluid through the filter element until either collapse/burst occurs or the maximum expected differential pressure is reached without element failure.
Contents of BS ISO 2941:
- Foreword
- Introduction
- Scope
- Normative references
- Terms and definitions
- Graphic symbols
- Test circuit and equipment
- Test procedure
- Acceptance criteria
- Reporting
- Identification statement (reference to this International Standard)
- Recommendations for electronic strip chart-recording device used in the
- ISO 2941 collapse/burst test procedure and typical curves generated by these devices
- Test data report form
- Examples of abrupt decrease in the slope of the differential pressure versus contaminant mass added curve