Correct, This is the info I will be testing for. I will cut an extra filter open and run a bubble point/integrity/largest pore size as well. The largest pore size calculation will mainly be academic, and will not be a realistic number do to the nonwoven media geometry. Going to practice filming on a simpler test (bubble point). Thank you for showing interest!
I have finished the 1st Bubble point Video and just about done editing it. I will post a link for a Youtube channel very soon.
Looking forward to it
Great video Andrew.
The bubble point test is interesting and as you say meant to basically show that the design and manufacturing of the filter results in a "pass/fail" of integrity (ie, no big holes/leaks anywhere). It's still possible that a badly (bad QA) manufactured filter (regardless of how well designed on paper) could pop-up once and awhile - like maybe the leaky seam on the AC-Delco, which might be part design (no crimp, just glued) and partly manufacturing induced (not enough glue).I used to wear gloves years ago, I am impervious to all fluids now.Great video Andrew.
The leaky bypass valve was interesting to see. I always wonder how much some of these bypass valves leak, especially when there is lbs of delta-p arcoss them in real use (instead of mere few inches of water). The ISO 4548-12 efficiency test and delta-p vs flow info of course is the real meat and potatoes of performance.
PS - should wear a long glove in that tank of IPA.
We will be testing a second set of new filters for the next tests. I do not have a housing for those elements to run further tests on.
The bubble test is more for testing the integrity of the design, assuming the manufacturing QA is done correctly. Obviously, a badly manufactured filter specimen (for whatever reasons) will show up in the bubble test, regardless of how well the design on paper is. Just gotta assume the virgin filter specimen used in the efficiency test is made per the drawing, and meets the design and manufacturing QA requirements.
