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Old 03-14-2016, 10:41 AM   #21
City: Westport
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Three filters...two fleet guard before engine and one on engine...20,10,2

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Old 03-14-2016, 10:48 AM   #22
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If it's a primary as in the first filter in a filtration series then start with 30. If it's an on engine racor, perhaps used as a secondary, then it's going to be to the manufacturers spec and probably 10 or less.

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Old 03-14-2016, 10:51 AM   #23
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Originally Posted by O C Diver View Post
So, even though your element is rated at 30 microns, the filter pics up the majority of contaminants between 2 and 30 microns. Parker (Racor) has an excellent PDF on this explaining how it works. Ted
Precisely Ted. Filtering 101 at work.

Parker, Cat and others have done studies where the P80 can become less than 20% or the original rated filter size before rated capacity/flowrate is affected. Unless an over sized filter body, the filter blinds off or is severely restricted by this point - one of the advantages of very big filters for a given flow rate.

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