A recap of bypass filters I see that are suitable as a final fuel filter between the waste oil tank and the IP... Also would be suitable for use as a crankcase filter (Listeroids should have one in both locations for trouble free service I think).
http://www.parker.com/racor/lfs_bypss.html^^^ Racor bypass filter with multi-layer string element... This would work well as an in-line fuel filter prior to the IP.
http://www.wefilterit.com/^^^ Franz (cost effective TP filter element, burnable element = no waste)
http://www.oilguard.com/Pricing.php^^^ Quality bypass filter, replaceable elements are $13 a pop
http://www.gulfcoastfilters.com/^^^ Quality bypass filter... No pricing, web page refers you to a local dealer... I called & replacement filters are about $17 each available in cases of 6... Case of 18 = $250.20
http://www.motorguard.com/air_2_2.html^^^ Some people have reported using these air filters (
http://listerengine.com/smf/index.php?topic=861.0 ) - The replacement filter _looks_ like a roll of toilet paper. Air tests show it will not pass tobacco smoke.
http://www.amsoil.com/StoreFront/bf.aspx (see BMK-11)
http://www.amsoil.com/bypassfilters/instructions/BP082.pdfhttps://www.amsoil.com/StoreFront/SearchResult.aspx?CategoryID=78^^^ Amsol spin on bypass filter, replacement cartridges in three sizes fit the spin on mount, price ranges from $36 to $44 for a replacement element depending on size... Throw away metal case spin on filter. Amsol claims longer cartridge life, and the larger capacity canister may well deliver that.
http://fleetowner.com/mag/fleet_whats_new_oil_3/index.html^^^ Bottom of the page has an index of oil filter companies... Google search for "bypass filters"
I looked at the bigger well known ones... I have qualms about puchasing a canister filter and being at the mercy of a single supplier for filter elements. All these filters claim below 5 micron filtration, and these are pretty basic technology and will run $150 - $200 for the filter unit, plus the on-going cost of replacing elements. In Lister stationary engines, elements should last a good long time, even as a WVO filter off the day tank, as long as the oil is hot passing thru the filter!!!
http://www.premolube.com/about.htm^^^ Something like this would work, but it is going to cost thru the nose... It uses an electrical heater.
http://www.plantdrive.com/newcatalog2/page15/page4/page4.html^^^Â "VORMAX Fuel Processor - Vormax coolant-heated two-stage water separator/filter with filter restriction gauge, comes complete with filter element" - Come on... Only $369 smackaroos with all the bells and whistles. It is ideal for this process tho: engine heated, gauged, water separator... But expensive enough I could eat like a king for a month.
I plan on burning any kind of waste oils I can get my hands on... I don't really care about animal fat, hydrogenated oil, etc... In automotive applications the type and quality of the source oil is more important, especially in cold weather. I plan on running hot engine coolant into the day tank to pre-heat the oil which will liquify all the fats and hydrogenated fractions. I will use a fuel pump, and it looks like I will need to plumb engine heat to the fuel pump and the filter canister as well to keep the oil warm and flowing cleanly up to the injector pump. The oil may require additional heat input prior to the injector to get the actual injector temp up to around 200 degrees. The danger on a system like this is without some form of active heating, on a cold day the high filtration bypass filter will clog with fat and wax that gell out at lower temperatures. My goal is to design a system and pre-filter the oil for gross particulates at a fairly high temperature prior to storage. Oil would be tapped off the storage tank as required into the day tank where it is preheated prior to pumping, final filtration to 5 microns or below, and sent hot to the IP.
As long as the day tank, pump, and filter in the WVO fuel feed is warm... And particulates are removed, it should burn fine in the indirect injected engine. The only problem I really see is possible issues with bleeding the lines, especially bleeding out a cartridge filter.... I think hot oil and insulated wrapped lines between sections should keep the viscosity low enough to bleed things properly.
On the diesel side of the dual-fuel system I don't think I am going to bother with a pump or filter. I will simply try to use a clean gravity tank and buy clean fuel. I don't expect to burn significant amounts of pump diesel. Once the engine thermostats are up to temp and 195* F water is available to heat the WVO side of the system I will just turn the valves and throw hot oil at the engine to turn my loads. Â With the proper pre-filtering, just about any oil or blend of fuels and oils should operate fine from the day tank. Final filtering, because of the time and/or pressure required to get a decent flow rate should be done at the engine rather than in the pre-filter process. The oil is going to have to be pre-heated to burn properly anyways, and it is going to take time to burn it... So: heat the day tank, small assist pump to deliver pressure, final filter -> IP.
I need to look at fuel pump and plumbing options for both parts of the WVO fuel processing. On the filter process/transfer side I need a high pump capacity and flow rates. On the engine house day tank side I don't need anything that will deliver high flow, high pressure, or requires a great deal of energy to drive... Just something small to push hot oil thru the filter and provide a few pounds of pressure to the IP... Nice to have in order to bleed final filter (almost a necessity as I look at things) and injector lines if needed. A waste oil water heater optionally plumped into the day use fuel system should provide the ability to make cold starts on WVO... A nice option to have for backup starting, even tho it will rarely get freezing where I will be setting this up.
http://www.donaldson.com/en/index.htmlDonaldson... I don't know how my searching missed them.