Oil filter micron rating

[Gary Allan]

What? That Beta 75 is considered "absolute"? Sure is ..as the day is long. Now some INDIVIDUALS don't recognize it as being so, but they've got an entire industry that uses this as common nomenclature. Traditionally Beta 75 was not a common automotive filter spec. It was usually reserved for hydraulic. Or perhaps better stated, the rating had more importance in some hydraulic applications.

George of CLS kept citing that filters with a 5 or whatever absolute rating were actually much lower. No fooling. The rating itself under the multipass protocol WILL be lower until the end of its lifespan (holding capacity).

It still comes down to lower is better and if holding capacities are comparable, the lowest rating under any beta (for lack of a better term) "wins".


..but for one such major player that considers Beta 75 ..Donaldson would surely trump any of our opinions or objections. I'd say that all of us would agree that they know what they're talking about.

HYD SPIN ON ASSY
Element assy, 10 micron absolute, 7.13" long, , temperature range -4F to +248F (-20C to +120C)


Hydraulic Filters Product Attributes
A - OD (Inches): 4.98
A - OD (mm): 126
B - Thread Size (Inches): 1-1/4 BPS
C - Length (Inches): 7.13
C - Length (mm): 181
Media Type: Synteq
Efficiency Beta 75 (Micron): 10
Element Collapse Rating (PSID): 145

 

[mechanicx]

Well I guess that answer what mean micron rating and absolute micron is. That Donaldson filter looks pretty good. The P1 is Beta 75 at 11 microns so it's not bad for the price.

 

[Gary Allan]

Good bang for the buck, no doubt. Just figure if you're in the range to make it pay. Figure that the rating is valid at the saturation point. If you're not going to reach it, is it really doing anything for you over a $3 Classic or MC?


I gained a little insight with rereading the protocol and watching the M1 vs. EaO showdown.

 

[Izb]

Originally Posted By: SuperBusa
See this thread.


https://bobistheoilguy.com/forums/posts/1631963/

From Purolator Engineering Dept:

Here are the Beta Ratios for the PureOne that was requested.
Below I put the standard beta ratio chart for comparison.

Micron 5 = B4.8
Micron 10 = B50
Micron 15 = B1000
Micron 20 = B1000
---------------------------------------------------------
Standard
You would typically see
Beta Ratio Efficiency
2....................50%
10....................90%
20....................95%
75....................98.7%
100....................99%
200....................99.5%
1000....................99.9%
----------------------------------------------------------
Using the standard ratio numbers here is our PureONE.
(> = greater than; µm = microns)

B2 = below 5 µm
B10 = 6.69 µm
B20 = >8 µm
B75 = >11 µm
B100 = 11.42 µm
B200 = >13 µm
B1000 = >15 µm


Thank you