Just a qualifier,
My name is Eric Rasmussen. I was a Filtration / Decontamination Engineer
for The Oil
Polishing Company in National City, California
for 20 Years ... We not only coined the term " Polishing " we also designed and built all of the Equipment
that was sold and Franchised under the name of Fuel Oil
Polishing of North America.
Although we had designed & built equipment
for the DOD we ourselves had never considered Small Boat Diesel Restoration
to be a viable business avenue for our Services Department. It did work great for small Owner/ Operators though and at least one to this day still advertises in the LOG here in San Diego
Raycor, Velcon it really doesn't matter who's Coalescing (Hydrophobic) element you use, most are capable of removing emulsified water down to 50 ppm. The key is Velocity ... Coalescing elements are Velocity Sensitive ! The second Key is you must Draw through these elements to achieve the best one pass efficiency. If your fuel is going thru the pump before the filter you are only making matters worse by strengthening the emulsification.
The Aquabloc elements mentioned - if my memory serves me correctly are Hydrophilic.
They absorb water and most elements of this type are designed to also act as a fuse, shutting off flow when completely saturated with water. Most of these elements use the same adsorbents used in diapers or kotex.
We were considered Masters in the Black Arts of Fitration ... Lol
We built some of the smallest Vacuum Distillation Equipment ever operated ... Most of which for the DOD and our own Services Dept. ... I have often thought this would be the best method for dealing with Water in Diesel. Only problem is it's not a One Pass method. The Equipment we produced for Diesel Fuel Purification was designed to decontaminate fuel from a worst case condition to Ultra Pure in a single
pass for purposes of efficiency or operational demands.
In addition Vacuum Distallation is much more complex and expensive to build - when done correctly. An advantage to this process is No consumables... With the exception of power.
Typically when additive packages Have been used it makes the situation much more difficult. You would be forced to use a mix of methods including Clay or Floculants to get where you want to be.
Long story short, these are all expensive options that highly out weigh the cost of Thirty Gallons of Diesel.
I agree that a properly sized and installed Racor or Dahl ( which we almost purchased that company many moons back ) would serve your engine
I would suggest against using Silica Gel or Cat Litter for a number of reasons but most of all would be the submicronic particle loading that you will not be able to remove with inexpensive filters and the nature of which would be cosidered a Hard to Fairly Hard Contaminate.
Again if you were to head
in that direction Molecular Sieve would be the product of choice but still has the contaminate issue as well.
Again all of these options are not cheap