Hydraulic Oil Precision Filter Tester

Meet the standard:

ISO 16889

ISO 4406

ISO 11170

Product Introduction:

Precision hydraulic filters are designed to capture particles typically smaller than 10 micrometers, often down to 1 micrometer or even sub-micrometer levels. Evaluating the performance of these filters requires a tester capable of generating controlled contamination with fine particles and, crucially, accurately counting these fine particles both before and after filtration. The standard method for this evaluation is the multi-pass test (ISO 16889).

In a Hydraulic Oil Precision Filter Tester configured for the multi-pass test, contaminated hydraulic oil containing a known concentration of fine test dust is continuously circulated through the filter element and returned to the reservoir. A high-resolution automatic particle counter, specifically calibrated for accurate counting at small particle sizes (e.g., 1. 2. 3. 4. 5 $\mu$m(c) and larger, as defined by calibration standards), is used to take simultaneous or near-simultaneous samples from the flow stream immediately upstream and downstream of the filter. By comparing the particle counts at various sizes, the tester calculates the filter's Beta ratio (βx​), which is the ratio of upstream particles to downstream particles greater than a given size 'x'. A high Beta ratio at a specific micron size indicates high efficiency at removing particles of that size and larger. The test also measures the filter's dirt holding capacity (DHC), which is the total mass of contaminant retained by the filter before a predetermined differential pressure limit is reached. Precision filter testers require exceptional cleanliness of the test fluid and system, along with highly sensitive and accurate particle counting capabilities.

The instrument is used for:

Determining the absolute or precision filtration rating (Beta ratio) of hydraulic filter elements at specified micron sizes.

Measuring the dirt holding capacity of precision filters.

Verifying that precision filters meet stringent efficiency requirements for critical hydraulic applications.

Benchmarking the performance of different precision filter media and designs.

Quality control during the manufacturing of high-performance hydraulic filters.

Research and development of new materials and structures for fine particle filtration.

Selecting filters to achieve and maintain target ISO 4406 cleanliness codes in demanding hydraulic systems.

Product Advantages:

Provides accurate and reliable Beta ratio and dirt holding capacity data specifically for precision filters at low micron ratings.

Essential for ensuring that filters meet the high cleanliness standards required by modern hydraulic systems.

Uses the internationally recognized multi-pass test method (ISO 16889) for evaluating filtration performance.

Allows for precise measurement of filter efficiency in removing very fine particles.

Helps in selecting filters that protect sensitive hydraulic components from fine contaminant wear.

Crucial for quality control and performance validation of high-efficiency filter elements.

Supports research and development of advanced filtration technologies.