What is ISO 16889?

ISO 16889 is an international standard that specifies the performance requirements and test methods for evaluating the filtration efficiency of hydraulic filters. The standard is used to evaluate the ability of a hydraulic filter to remove contaminants from the hydraulic fluid and to ensure that the filter meets a minimum level of performance.

The standard is one of a number of different test methods that can be used to evaluate the performance of hydraulic filters, including:

  1. Multi-pass test: This test involves passing a defined volume of fluid through the filter multiple times, and measuring the amount of contaminants that are removed.
  2. Single-pass test: This test involves passing a defined volume of fluid through the filter once, and measuring the amount of contaminants that are removed.
  3. Bubble point test: This test involves measuring the pressure required to cause air bubbles to pass through the filter media.
  4. Beta ratio test: This test involves measuring the ratio of the size of the contaminants removed by the filter to the size of the filter’s pores.

Overall, ISO 16889 provides a consistent and reliable way to evaluate the performance of hydraulic filters, and helps ensure that filters meet the necessary performance requirements.

Beta Ratio Test result example
Typical Beta Ratio Test report sample