Fuel Polishing system

[Monique]

Hello fellow WAFIs,

I wish for such a system on the new boat. I looked at commercially available units but they all share one point: insane pricing.

How expensive can such a system be? Bits of piping, pump and 2 inline filters???

Has anyone designed and built such a system in this readership? Share the design?

I wish something tidy and not too folkloric ...

 

[geem]

On the ones we have specified for standby generator sets we usually circulate 2-5% of the fuel tank volume daily. The pump runs 24/7.
I would install a system that takes a pickup pipe from the lowest point of the tank and pumps though a catridge type filter unit with a pressure guage. I would wire the pump to come on with the engine ignition. Everytime you use the engine you would be polishing. You may want to fit a reasonable size pump on the basis that you don't have the engine on much so you need to maximum isle the flow during this period.

 

[Monique]

Thank you for the insight. I found a solution courtesy of TillerGirl of this parish... see the MOBO forum.

Cheers.

 

[Sybarite]

Hello fellow WAFIs,

I wish for such a system on the new boat. I looked at commercially available units but they all share one point: insane pricing.

How expensive can such a system be? Bits of piping, pump and 2 inline filters???

Has anyone designed and built such a system in this readership? Share the design?

I wish something tidy and not too folkloric ...

http://m.youtube.com/watch?v=pKVdS15Qkyc. @ 6:30.

He made his own polisher; you could perhaps email him.

 

[Jeva]

We have 'inherited' a system from 'Gulf Coast Filters' in the US. I have to say that it works extremely well. We have two large units, one on the fuel polishing and the other on the engine oil system and a small unit on the generator oil. The clever bit, is that they use a kitchen towel roll for the filter, in the case of the large system and a toilet roll for the filter in the small unit. The disadvantage is that they are US standard rolls, but that said they are very cheap to replace.
Gulf Coast filters are designed for trucks, but so far thats not been an issue. Google should find them for you, if not contact me and I'll pass on contact details.
Cheers

 

[Monique]

I've read about Gulf Coast filters. Seems to do what it says on the tin....

 

[GrahamM376]

Our new engine came with an electric pump which is constant speed and whenever the ignition is turned on the fuel's being polished through the filters and back to the tank via the return from the engine filter. I recently dropped a pipe down through the Eberspacher fuel pipe hole and pumped some fuel from the bottom of the tank, pleasantly surprised no water or crud appeared.

 

[nimbusgb]

Cost me about £150 for an electric pump, a couple of filter separators, clamps, hose and a board to mount it all on.

Just runs all the time the engine breaker is on. Sucks fuel from the low point of the tank and back in to the tank top.