Originally Posted By: ThirdeYe
Oh alright, that makes sense. I was figuring that since it was a 40% filter that it would be significantly less at 20 microns (i.e. span>
Oops, I meant 40 micron filter.
http://www.bobistheoilguy.com/forums/ubb...045#Post1698045
From the post above - note efficiency % vs micron rating for the Stratapore. I would assume the same type of correlation for most medias. So, looks like there is ~4% efficiency drop from 30 to 5 microns. Based on this, I'd estimate the PureONEs that are rated at 99.9% @ 40 microns are around 96 ~ 97% @ 20 microns.
For Fleetguard filers:
Stratapore media: 99% 30 micron, 85% 10 micron
Stacked disc media: 99% 30 micron, 98% 10 micron, 95% 5 micron
Maybe I'll email Purolator and ask them specifically what the % efficiceny is at 20 microns for the ones they rate at 99.9% @ 40 microns.
Oh alright, that makes sense. I was figuring that since it was a 40% filter that it would be significantly less at 20 microns (i.e. span>
Oops, I meant 40 micron filter.
http://www.bobistheoilguy.com/forums/ubb...045#Post1698045
From the post above - note efficiency % vs micron rating for the Stratapore. I would assume the same type of correlation for most medias. So, looks like there is ~4% efficiency drop from 30 to 5 microns. Based on this, I'd estimate the PureONEs that are rated at 99.9% @ 40 microns are around 96 ~ 97% @ 20 microns.
For Fleetguard filers:
Stratapore media: 99% 30 micron, 85% 10 micron
Stacked disc media: 99% 30 micron, 98% 10 micron, 95% 5 micron
Maybe I'll email Purolator and ask them specifically what the % efficiceny is at 20 microns for the ones they rate at 99.9% @ 40 microns.