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Fuel transfer/polishing pump
Sounds like a good system. I've designed mine so that a reversing
pump is not necessary, and I can switch the filter in or out. The idea is that bypassing the filter I can transfer fuel faster if the fuel is already clean. One poster mentioned that Raycor type filters don;t make good polishing filters because they are surface filters and clog up quickly. The paper towel and toilet paper types are better for polishing. I was always thinking of using Raycors but now I have to do some more research. Doug "Glenn Ashmore" wrote in message news:nZ%wb.52966$xV6.15766@lakeread04... Doug, I have been through this myself. Actually you do have more of a filter problem than a pump problem. The 500 is just to small for a practical polishing system. You need a 1000 at a minimum. The smallest transfer pumps (Reverso) are rated at 180 GPH at zero head which is the max rating for the 1000. Racor says that when you get close to the max rating the turbine can scour water out of the bowl but you have head loss in the piping and the filter itself so the actual flow will be somewhat below the max rating. It would take four 1000's to keep up with a Jabsco VR050 and two to handle a Groco SP06. While the Reverso filters can handle up to 15 PSI, Reverso incourages upstream installation to avoid the possibilities of pressureized leakage and slightly better filtering performance. My system consist of 40 gal port and stbd mains and a 30 gal "day" tank. The mains have Racor 1000s on their pickup lines and there is no external fill for the day tank. Any fuel reaching it has to go through a filter first. I am using the Reverso GP301 3 GPM reversable with four check valves and two 3-way selector valves. By changing the direction of the pump rotation I can pull from either main tank and with one 3-way selector can route the output to any of the three tanks. The second 3-way allows me to bypass the day tank and pull from either of the mains should the Reverso crap out. With this arangement I can fill the day tank with freshly filtered fuel, polish a single tank or move fuel to the windward tank for trim. Whenever fuel moves it gets filtered. Doug Dotson wrote: I am designing a fuel polishing and transfer system. My thought is to use valves to route fuel from any tank to any tank. No problem with that part. I want to be able to just transfer fuel or switch in a filter to polish the fuel while transferring. Since I can select the same tank for source and destination, I can polish fuel in place as well. The problem comes with the selection of a pump. I was looking at a Groco or Jabsco pump which seems good for transfer purposes, but way exceeds the flowrate of the filter when polishing. A Walbro fuel pump (which I have as a priming pump now) seems like a good fit for polishing (33 GPH) but will be slow when just transferring fuel. What happens when a 5.5 GPM pump (Jabsco) is pushing fuel through a filter rated at 60 GPH (RACOR 500)? Thanks! Doug s/v Callista -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com |
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