Hi Guys
My business (www.petrospection.com.au) is involved in the handling of bulk fuels and we have done this sort of thing commercially for years. I have looked at fuel polishing for boats, ships and underground tanks as a new business opportunity, because commercially it is becoming problematic to enter tanks to clean them or dispose of any fuel that does not come with a manufacturers quality certificate. We don’t need any more work, so we are not looking very hard at the moment.
The common philosophy on fuel polishing is that you have to induce enough flow into the tanks and lines to lift any settled detritus in the tank. There is no point in pumping at normal fuel flow rates whilst at dock because the crap in the tank just sits there until you are out being thrown around by 10 foot high waves when it all comes loose and blocks your filter sup. It happens all the time.
There is also no need to filter the fuel to the degree it gets filtered at the secondary fuel filter either. The aim is to get the big stuff out so the secondary filter can do its job without getting blocked. I am assuming that you have a primary filter on the engine and a secondary Racor type filter before that already. You all should have.
The industry standard for fuel polishing is the Gulf Coast Filters line of products that use a large filter element that looks something like a roll of paper towels. I think that GCF have some information on-line.
To do the job properly, you should have at least half inch transfer lines and high volume transfer pump.
Cheers
Al
Brite Star
CR 38 #82
Kettering Tasmania
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So;I'm about to buy a slightly used Racor filter. MY intention it to attach it to a fuel pump and several wires and hoses to make a home-made fuel polishing system. Short-term, I can manually clean fuel in my "neglected" tank (and my "less neglected" tank). Medium-term, I want to be able to mount it somehow and flip a switch to move fuel from the lower tank to the higher tank, filtering it in the process, and using the higher tank exclusively for my daily diesel needs.
First question: how stupid am I?Second question, assuming the answer to the first one is less than "totally": Any recommendations on fuel filter? I'm eyeing one of these:
Cheersmickey--
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I,don't think you are studid,but why?If you have the ability to use
either tank independently of the other and switch back and forth why
transfer fuel?Is it just to polish the fuel what am I,missing
Dave 52
On May 8, 9:09 pm, Mickey Panayiotakis <svba...@gmail.com> wrote:
> So;
> I'm about to buy a slightly used Racor filter. MY intention it to attach
> it to a fuel pump and several wires and hoses to make a home-made fuel
> polishing system. Short-term, I can manually clean fuel in my "neglected"
> tank (and my "less neglected" tank). Medium-term, I want to be able to
> mount it somehow and flip a switch to move fuel from the lower tank to the
> higher tank, filtering it in the process, and using the higher tank
> exclusively for my daily diesel needs.
>
> First question: how stupid am I?
> Second question, assuming the answer to the first one is less than
> "totally": Any recommendations on fuel filter? I'm eyeing one of these:http://www.go2marine.com/item/160837/walbro-marine-electric-fuel-pump...
Hi Mickey
I agree about the issues of size but you need to address the problem of getting any rubbish in the tank into suspension somehow. High flows are the obvious and conventional answer. In commercial applications, where fuel is being polished using external pumping and filtration equipment, the trick is to use some form of high velocity jet or spray to break up any sludge so the suction pump can pick it up.
For the pump and filtration, you don’t need high pressure. Filters are low pressure devices. Our setup used a positive displacement diaphragm pump to suck the fuel out and a high pressure (100 psi) gear pump to jet it back in.
A word of caution: Spraying diesel fuel and water emulsions generates static electricity. Diesel fuel is a high flash point product but when in vapor form it is quite volatile. Static sparks and volatile fuel equals big bang. If you find yourself spraying fuel into a tank where there is any oxygen, make sure you fit the end of the sprayer with an earth strap to discharge any static build up. If you have a problem it will far too late to do anything about it. It is not far fetched – I lost a friend 20 years ago when a tank blew its end out.
With the filter, you will be expecting to strain out large volumes of crap, so a conventional diesel filter is not the answer. There are 10 inch cartridge filters available at any water supply centre that take big elements. These are cheap.
Cheers
Al
Brite Star
CR 38 #82
Kettering Tasmania
Hi Mickey
I agree about the issues of size but you need to address the problem of getting any rubbish in the tank into suspension somehow. High flows are the obvious and conventional answer. In commercial applications, where fuel is being polished using external pumping and filtration equipment, the trick is to use some form of high velocity jet or spray to break up any sludge so the suction pump can pick it up.
For the pump and filtration, you don’t need high pressure. Filters are low pressure devices. Our setup used a positive displacement diaphragm pump to suck the fuel out and a high pressure (100 psi) gear pump to jet it back in.
A word of caution: Spraying diesel fuel and water emulsions generates static electricity. Diesel fuel is a high flash point product but when in vapor form it is quite volatile. Static sparks and volatile fuel equals big bang. If you find yourself spraying fuel into a tank where there is any oxygen, make sure you fit the end of the sprayer with an earth strap to discharge any static build up. If you have a problem it will far too late to do anything about it. It is not far fetched – I lost a friend 20 years ago when a tank blew its end out.
With the filter, you will be expecting to strain out large volumes of crap, so a conventional diesel filter is not the answer. There are 10 inch cartridge filters available at any water supply centre that take big elements. These are cheap.
Cheers
Al
Brite Star
CR 38 #82
Kettering Tasmania
Y
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Hi Mickey
I agree about the issues of size but you need to address the problem of getting any rubbish in the tank into suspension somehow. High flows are the obvious and conventional answer. In commercial applications, where fuel is being polished using external pumping and filtration equipment, the trick is to use some form of high velocity jet or spray to break up any sludge so the suction pump can pick it up.
For the pump and filtration, you don’t need high pressure. Filters are low pressure devices. Our setup used a positive displacement diaphragm pump to suck the fuel out and a high pressure (100 psi) gear pump to jet it back in.
A word of caution: Spraying diesel fuel and water emulsions generates static electricity. Diesel fuel is a high flash point product but when in vapor form it is quite volatile. Static sparks and volatile fuel equals big bang. If you find yourself spraying fuel into a tank where there is any oxygen, make sure you fit the end of the sprayer with an earth strap to discharge any static build up. If you have a problem it will far too late to do anything about it. It is not far fetched – I lost a friend 20 years ago when a tank blew its end out.
With the filter, you will be expecting to strain out large volumes of crap, so a conventional diesel filter is not the answer. There are 10 inch cartridge filters available at any water supply centre that take big elements. These are cheap.
Cheers
Al
Brite Star
CR 38 #82
Kettering Tasmania
Y
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