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which is the better beta ratio? #4576631
11/16/17 10:52 PM
11/16/17 10:52 PM
Joined: Nov 2017
Posts: 9
South GA
wuntun Offline OP
wuntun  Offline OP
Joined: Nov 2017
Posts: 9
South GA
Looking at two different filters from wix for hydro-static tractor, I find one that is cross referenced from Donaldson, and another from crossing the oem part number. They are both the same in fitment, however, the beta ratio and micron ratings are different. Which filter would be the best? .....,,,,,,,,,...,,,,,.wix 51455 http://www.wixfilters.com/Lookup/PartDetails.aspx?Part=61853 Part Number: 51455
UPC Number: 765809514553
Style: Spin-On Hydraulic Filter
Service: Hydraulic
Type: Full Flow
Media: Microglass
Height: 6.02 (153)*
Outer Diameter Top: 3.81 (97)*
Outer Diameter Bottom: Closed:
Thread Size: 1 3/8-12
By-Pass Valve Setting-PSI: None
Beta Ratio: 2/20=4/10
Burst Pressure-PSI: 1000
Max Flow Rate: 24-28 GPM
Nominal Micron Rating: 10 ................,,,,,,,,,,,,,,,,,,,,...................,,,,,,,,,,,..........................,,,,,,,,,,,..................,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,................,,,,,,,,,,,,,,,,,,,...................,,,,,,,,,,,,,,,,,................ wix 51456 http://www.wixfilters.com/Lookup/PartDetails.aspx?Part=61987 Part Number: 51456
UPC Number: 765809514560
Style: Spin-On Hydraulic Filter
Service: Hydraulic
Type: Full Flow
Media: Microglass
Height: 6.02 (153)*
Outer Diameter Top: 3.81 (97)*
Outer Diameter Bottom: Closed:
Thread Size: 1 3/8-12
By-Pass Valve Setting-PSI: None
Beta Ratio: 2/20/75=9/23/30
Burst Pressure-PSI: 1000
Max Flow Rate: 24-28 GPM
Nominal Micron Rating: 9


Wuntun
Re: which is the better beta ratio? [Re: wuntun] #4576669
11/17/17 01:45 AM
11/17/17 01:45 AM
Joined: Aug 2006
Posts: 9,887
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,887
Central Washington
Top one, 51455
Beta ratios work by dividing the minus one of itself with itself.
so a Beta 2 is
1/2=.5 or 50%
Beta 20 is
19/20=.95 or 95%

So knowing this we see that 51455 is 50% at 4 micron and 95% at 10 micron. Thats pretty good.
51456 is 50%@ 9 micron and 95%@ 23 micron. Additionally it shows 98.6%@ 30 micron.
Which is ok, but 51455 is clearly better at filtering.


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: which is the better beta ratio? [Re: wuntun] #4576897
11/17/17 09:34 AM
11/17/17 09:34 AM
Joined: May 2014
Posts: 3,835
Columbus,Nebraska
Yah-Tah-Hey Offline
Yah-Tah-Hey  Offline
Joined: May 2014
Posts: 3,835
Columbus,Nebraska
I wouldn't spend a lot of time over thinking this. No way you will ever be able to see benefits of picking one over the other. Make your choice and forget it.

Re: which is the better beta ratio? [Re: wuntun] #4576969
11/17/17 10:26 AM
11/17/17 10:26 AM
Joined: Nov 2017
Posts: 9
South GA
wuntun Offline OP
wuntun  Offline OP
Joined: Nov 2017
Posts: 9
South GA
Thanks for the informative replies. The 51455 is listed as my replacement on the wix website, but my supplier o'riellys shows the cross ref to a 51456, so ??? to the info. I now understand the beta you explained, thank you. And no, i really wasn't over thinking this, it's just the fact that they are a $60+ filter, and they are used for 400 hours. Want to go with the best one, and then stick with it.


Wuntun
Re: which is the better beta ratio? [Re: wuntun] #4576977
11/17/17 10:33 AM
11/17/17 10:33 AM
Joined: Sep 2015
Posts: 6,086
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 6,086
Kalifornia Kollective
Darn, I thought we were going to talk stocks ...


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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