how do u read wix beta ratio rating?

[1 FMF]

they list beta ratios for

FL1A -> wix #51515 as 2/20=19/41.

and for wix#51365 as 2/20=15/22

and for wix#51356 as 2/20=18/38.

how do i interpret this?

 

[bmwguy]

My guess is:

2 micron avg dia is caught 19% of the time 1st pass
20 micron avg dia is caught 41% of the time 1st pass

etc.

efficiency rating perhaps?


Pretty much worthless unless a confidence level is specified.

 

[1 FMF]

is it 2/20 is the micron size, the other side of '=' is the corresponding beta?

so 2 micron = (19-1)/19 = 94.7%
and 20 micron = 43/44 = 97.7% for the FL1A.

???

 

[tdi-rick]

OK, in the case of the 51515, Beta 2=19, Beta 20=41.
Beta 2 = 50% of all particles in the relevant SAE multipass test, therefore 50% of 19 micron particles are captured.

There is an explanation of Beta ratios here http://www.hastingsfilter.com/engineer/98_4.html

 

[Filter guy]

quote:

---

Originally posted by 1 FMF:
they list beta ratios for

FL1A -> wix #51515 as 2/20=19/41.

and for wix#51365 as 2/20=15/22

and for wix#51356 as 2/20=18/38.

how do i interpret this?

---

Beta 2 is 50% efficient.

So the 51515 is 50% efficient at 19 microns and larger.

Beta 20 is 95% efficient.

So the 51515 is 95% efficient at 41 microns and larger.

You can figure out the rest..

 

[Roger]

Where did you get this Beta information, 1 MFM?

 

[Bill Kapaun]

quote:

---

Originally posted by Roger:
Where did you get this Beta information, 1 MFM?

---

Maybe click the link TDI posted above?

 

[Roger]

I'm asking about the Wix beta data.

 

[John K]

The WIX website has it. If you click on the part no. it give specs on it. Nice site.
http://www.wixfilters.com/filterlookup/results.asp?PartNo=51365&imageField.x=0&imageField.y=0

 

[Roger]

Hey thanks! As often as I've looked at the Wix web site data, I've never noticed the beta data before.

Guess I need new glasses.

And they have nominal micron ratings too. Way to go Wix!

I've switched a lot of my air, oil and crankcase filters purchases over to Wix brand, and discoveries like this make me more satisfied that I did. Now, if only other filter manufacturers would be this forthright with product information.

 

[Bill Kapaun]

quote:

---

Originally posted by Roger:
Hey thanks! As often as I've looked at the Wix web site data, I've never noticed the beta data before.

Guess I need new glasses.

---

Don't feel bad. They didn't start doing it until recently.
I got new glasses and they still didn't help