Race for clean oil – filter efficiency tests

Why discuss this topic:

During operation, all machines will experience particles in the oil from ingression or generated when changes occur e.g. speed, load, torque or oil pressure changes. Already captured particles may be released from oil filters due to pressure pulses/surges. 
It is important to have clean oil and be able to keep up with particle amounts, which is why different filter technologies are combined. Filters should have a good efficiency - not just initially with new filters and new oil, but also at the end of the filter’s life. 
Oil filter selection often focuses on initial particle removal efficiency (according to the Multi-pass test or as stated by manufacturers) but never on the functionality after months in operation. Resent tests have documented, that most oil filters on the market will have reduced particle removal efficiency over their life – some critical low efficiency, which means your oil system will continue to get more contaminated and machine life will be harmed.

How will the presentation address the problem:

The presentation discusses standard oil filter tests and how most are developed for pleated filter media (inline pressure filters). Main focus is on Multi-pass test and its limitations e.g. coarse test dust and short time testing.

C.C.JENSEN has developed a test variant – especially made for offline depth filters. This test and real-life examples will be discussed.

Why is it important:

Most users of oil filters are not familiar with the test methods and the limitations, nor the importance of keeping up with contamination over the whole filter life, and not just during a short oil filter test.

If the system filters cannot keep up with ingression and generation of particles it will result in reduced in-service-life of oil and machine components. If the oil filters have limited dirt holding capacity it will result in high operation costs (frequent replacement).

What will the attendees learn:

• - The most common oil filter standard tests with focus on Multi-pass, ISO 16889
• - Variations made for offline depth filter test
• - Examples of test results
• - Real life example of the race for clean oil – removing particles as soon as they enter the oil