A recirculation system will be best able to recover a "particle storm" or slug of sludge/bioburden/polymerized fuel
when it breaks loose due to its ability to rapidly ''turn-over'' a tank and return the resident particle load to a reasonable level. A recirc system will also greatly attenuate such deposits from forming ..... but you really have to start with a fairly clean tank. You really have to look at the (non-published) dirt capacity of the filter used in such applications. My ballpark estimate is: 10" polypropylene spun bonded @ 50 grams, 10" pleated paper @ 100-150 grams, typical Racor @ 25-50 grams .... once you reach the load limit, the filter cannot flow. So to anwer your question .... tell me how much crap you already have in your tank and I''ll tell you how many filters you''ll need; if its a clean tank we already know the answer and with a recirc. system will know that it will stay that way.
If you take on a contaminated load of fuel
, the recirc system is also the best at fast particle reduction.
Without a recirc. system if a particle storm does happen youll need a truck-load of filters to keep up the replacment needs.
I have quite a sophisticated system: pumped recirc loop, tank vent filter, a to-the-engine line
of - single stage Racor 2µM to a 3 gallon ''day'' tank which delivers to the lift pump
, system is a pressure system that works on an automotive 12v fuel pump
at the tank for NO air leaks, etc. The system is spphisticated but quite cheap to build.
Filters last much much longer if they are pressurized rather than the antiquated typical ''boat system'' model that works on vacuum from the lift pump
eMail me direct and I will send you a line
sketch of my system if you''re interested.