Bubble Test Bench ISO2942

The "bubble point test" is a common method used to evaluate the pore size and integrity of filter media in hydraulic fluid power filter elements. The test is performed in accordance with ISO 2942:2018, which provides guidelines for conducting this test. While ISO 2942:2018 specifies the test method and requirements, it does not prescribe a specific "test bench." The test bench or equipment used should conform to ISO 2942:2018 standards and requirements.

Here is an overview of the bubble point test method as it relates to ISO 2942:2018:

Test Procedure:

• Filter Element Preparation: The filter element to be tested is selected and conditioned according to ISO 2942:2018.
• Test Fluid: A suitable test fluid is chosen based on the application and requirements. This fluid is introduced into the filter element under controlled conditions.
• Pressurization: The filter element is pressurized with the test fluid. The pressure is gradually increased until the first steady stream of gas bubbles is observed coming out of the filter media.
• Measurement: The pressure at which the first steady stream of bubbles is observed is recorded as the "bubble point." This pressure corresponds to the pore size of the filter media, as smaller pores will hold back the gas while larger pores will allow the gas to pass through.
• Analysis and Reporting: The bubble point is used to assess the pore size and integrity of the filter media. In hydraulic systems, this parameter is crucial for determining the filter's ability to retain particles of a certain size.

Test Bench :

The specific test bench used to perform the bubble point test according to ISO 2942:2018 is capable of accurately controlling the test fluid and pressure. The test bench typically includes components such as a pressure source, filter holder, and a means for introducing the test fluid.

The design and operation of the test bench may vary, but it must adhere to the test procedure and requirements outlined in ISO 2942:2018. The equipment should be calibrated and validated to ensure accurate and repeatable results.

The bubble point test method, as outlined in ISO 2942:2018, is used to evaluate filter media pore size and integrity in hydraulic filter elements. The test bench or equipment used should meet the standard's requirements to ensure accurate and consistent test results.