Reply
 
Thread Tools Display Modes
 
Old 04-07-2013, 10:02 AM   #21
Veteran Member
 
City: newport
Country: usa
Join Date: Jan 2013
Posts: 70
Quote:
Originally Posted by bobc View Post
If you're prone to making mistakes, this would be a good idea. In my system I have a return manifold and a supply manifold. The valves are for port and starboard. They're shown all open in this picture. I don't run that way, I keep either the left valves open or the right valves open. The only time I'll open a port tank return with a starboard tank supply (or visa versa) is when I'm transferring fuel with the fuel polishing system.

The one thing I have to be really careful about on this system is to keep a return line open. The mechanic who installed my engine, and this fuel system told me that with a high pressure injection system, you'll immediately destroy the injectors (and pump?) if the returns are both closed.

It's flexible, but not idiot proof.

In this picture you can also see the fuel pickup is at the bottom corner of the tank.



Nice clean set up, easy to understand and operate The fuel feed valve @ the lower corner of the fuel tank is installed very low in the tank < it looks like its lower than most > but I would guess its still 1 1/2 inches off the tank bottom, We just serviced a 300 gal tank with a very similar set up with a racor twin 900 polishing system, here is a picture of what came out of the tank,
Attached Thumbnails
Click image for larger version

Name:	0320131316a95263117.jpg
Views:	37
Size:	172.9 KB
ID:	17827  
__________________
Advertisement

Craig Schreck is offline   Reply With Quote
Old 04-07-2013, 11:52 AM   #22
Senior Member
 
bobc's Avatar
 
City: Everett
Country: US
Vessel Name: Note by Note
Vessel Model: 34 DeFever
Join Date: Apr 2011
Posts: 133
Thumbs down

Quote:
Originally Posted by Craig Schreck View Post
Nice clean set up, easy to understand and operate The fuel feed valve @ the lower corner of the fuel tank is installed very low in the tank < it looks like its lower than most > but I would guess its still 1 1/2 inches off the tank bottom, We just serviced a 300 gal tank with a very similar set up with a racor twin 900 polishing system, here is a picture of what came out of the tank,
I was concerned about that problem, but now believe that my tanks are reasonably clean. The return is at the top of the tank and on the other end. When the tanks were less than half full, I emptied one into the other and then added back in a very small amount of fuel, just enough to keep the polishing pump primed. The fuel would drop from the top of the tank to the bottom with some velocity, and then stream down to the other end. I figured that would knock something loose, but it didn't. Other than a couple of specs of gunk, the fuel came out clean.
__________________

bobc is offline   Reply With Quote
Old 04-07-2013, 12:55 PM   #23
Veteran Member
 
City: newport
Country: usa
Join Date: Jan 2013
Posts: 70
Quote:
Originally Posted by bobc View Post
I was concerned about that problem, but now believe that my tanks are reasonably clean. The return is at the top of the tank and on the other end. When the tanks were less than half full, I emptied one into the other and then added back in a very small amount of fuel, just enough to keep the polishing pump primed. The fuel would drop from the top of the tank to the bottom with some velocity, and then stream down to the other end. I figured that would knock something loose, but it didn't. Other than a couple of specs of gunk, the fuel came out clean.
The boat we serviced in the picture was in the process of a twin Diesel re power, The owner had run his fuel polisher often and his fuel was spotless when we pumped the 300 gals into our truck, The outfit doing the re power recommended to the owner to clean his tanks @ this point due to a high pressure common rail system with the new diesels, We had real poor tank access thru a fuel sender and we were not really expecting that much sludge do to the polisher and the above average polisher installation and the fact the owner said he never had any fuel problems in the past, We pulled fuel from his low point valve @ the polisher input and snaked a 1 inch wand thru the open fuel sender and pressure sprayed the best we could, The tank builder did not recommend we install a inspection plate due to to the wall thickness of the tank skin, the tank had 3 sections and we spent 1 hr in each section snaking past the baffles, This is not the best way to clean a fuel tank but some times that all you can do with out pulling the tank or cutting up the boat, The boat was on the hard & I really cranked up the fuel pressure for this tank, I took the picture because the owner was not there for the cleaning and was concerned about waisting money for the service, He has now scheduled another tank cleaning @ the next haul out. I find on most fuel related engine brake downs the owners felt the tanks were clean enough for normal operation and were surprised @ the volume of sludge we removed.
__________________

Craig Schreck is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 02:32 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012