polishing?

Collecting, filtering and dewatering of WVO SVO vegetable oil. For Biodiesel producers too.

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polishing?

Postby gary » Wed Jul 09, 2008 10:33 am

I noticed on a post here that someone sends theier oil to a cuno polishing filter after the cf...is this a common practice and or neccasary?
Do most people use the bypass to go right into the fuel tank?
gary
 
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Postby rkpatt » Thu Jul 17, 2008 6:57 am

For me, a final 2 micron polishing filter prior to filling the tank is must.
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Postby VegMeister » Thu Jul 17, 2008 10:24 am

As someone who is totally in love with their new CF, I don't see why this is necessary.


Can you please tell me?
centralvalleybiodiesel CF
1993 GMC Sierra K2500 6.5L + homebuilt veg kit, OEM glowplug failure (update: rebuilt with a 6.2 block, working fine)
1988 Ford 6.9L OEM dual tank, 90+% veg oil blend.
1989 Ford 7.3L, 80+% veg oil blend.
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Postby John Galt » Thu Jul 17, 2008 11:39 am

I've seen pics of a number of CF systems and it was by no means a closed system. The oil coming out the CF might be super clean but it could easily pick up crud from the environment it's in. A final filter on the pump between the storage barrel and the tank is cheap insurance, and if the upstream processing is good then the filter will last for a long time.
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final filter

Postby gary » Thu Jul 17, 2008 2:11 pm

What is a good choice for a final filter? (housing and cartridge) micron rating..nominal or absolute? Thanks
gary
 
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Re: final filter

Postby SunWizard » Thu Jul 17, 2008 2:27 pm

gary wrote:What is a good choice for a final filter? (housing and cartridge) micron rating..nominal or absolute? Thanks

I like the 2 micron cim-tek filter and head:
http://www.jmesales.com/item/36197/Cim-Tek-Fuel-Filter-Adapter.aspx
2 microns to fit that head for $7.63 here:
http://www.jmesales.com/item/36277/Cim-Tek-300-Series-Fuel-Filter.aspx

To decide Nominal or absolute (and almost any other question you ask), we would need to know your vehicle make model and year.

The usual definition of polishing filter is you circulate through it many times to get finer final filtration. This is not needed with a CF if you run it right, so 1 pass through a final filter on the way to the vehicle tank as insurance is a good idea.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
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Re: final filter

Postby John Galt » Thu Jul 17, 2008 7:04 pm

gary wrote:What is a good choice for a final filter? (housing and cartridge) micron rating..nominal or absolute? Thanks


I use a 5µ string wound whole house filter. It's no doubt nominal but my vehicle filter is 10µ so this seems adequate. As a final filter they last for many hundreds of gallons and I've never had a vehicle filter clog.
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car

Postby gary » Thu Jul 17, 2008 9:31 pm

I have a 02 vw golf. Since I cant get my car close to the cf rig I will have to transfer into a plastic tote for now.(no polisher yet)
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