Subject: Fuel transfer/polishing pump
From: "Doug Dotson"

See below.

"LaBomba182" wrote in message
...
Subject: Fuel transfer/polishing pump
From: "Doug Dotson"

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)?

Why not just ask Racor?
http://www.parker.com/ead/cm1.asp?cmid=392

It's not a filter question.


Sure it is. It's all interrelated.


And I believe Racors are designed to be drawn through not pushed into.
Again, ask Racor.

From experts I know, pushing fuel through a filter is more efficient.

Yes, but with what type of filter system?
If the filter system is not designed to be "pushed through" you may have a
problem. It may effect the coalescing action.
That's why I said "ask Racor".
Or are they to "experts" you are speaking of?

And fuel "polishing" is a joke IMHO.

And you would be wrong.

Not based on the fact that most people seem to only run their system (if they
have one) or have a company "polish" their fuel at the dock.


Unless the fuel in the tank/s is well stirred up all you are doing is
filtering
what is already clean, settled out fuel.

Well, in an ideal world. Perhaps drawing the fuel into to polishing system
lower
in the tank than that feeding the engine.

You're still just drawing fuel out of one baffeled area of the tank. Unless you
can get all the fuel in the tank stired up really well you are not doing a very
good job of "polishing" it.

Capt. Bill

This is so true it isn't funny - but these marina sailors don't know
that - so they invent these stupid designs - like the guy with 6 or 8
or 12 fuel tanks in a 50' boat - what total stupidity. Get a life - go
cruising - instead of being "wanna-be" naval architects.

LISTEN UP - all the **** sits on the bottom till the 1st rolly bouncy
storm - then it gets stirred into suspension - and sucked into the
filters and clogs them quickly.

BTW, throw away your epirbs and radios so you can't call someone out
into danger to rescue your stupid ass.




And fuel "polishing" is a joke IMHO.
Unless the fuel in the tank/s is well stirred up all you are doing is filtering
what is already clean, settled out fuel.

Capt. Bill

See below.

"LaBomba182" wrote in message
...
Subject: Fuel transfer/polishing pump
From: "Doug Dotson"

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)?

Why not just ask Racor?
http://www.parker.com/ead/cm1.asp?cmid=392

It's not a filter question.

And I believe Racors are designed to be drawn through not pushed into.
Again, ask Racor.

From experts I know, pushing fuel through a filter is more efficient.

And fuel "polishing" is a joke IMHO.

And you would be wrong.

Unless the fuel in the tank/s is well stirred up all you are doing is
filtering
what is already clean, settled out fuel.

Well, in an ideal world. Perhaps drawing the fuel into to polishing system
lower
in the tank than that feeding the engine.

Capt. Bill

Why not use the engine to do it - most diesels pump 3-4 times what
they use and return it. I have a selector valve on the return to
select which tank I want it back in.


On Tue, 25 Nov 2003 17:49:20 -0500, "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

On Tue, 25 Nov 2003 17:49:20 -0500, "Doug Dotson"
wrote:
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... What happens when a 5.5 GPM pump
(Jabsco) is pushing fuel through a filter rated at 60 GPH (RACOR 500)?

It won't pump at its rated flow. The simplest thing to do is to put
in the three valves that are necessary to bypass the pump. You can
then bypass the pump for transfer purposes and put it back when you
are running your engine.

While you are at it, it would be good to put in an extra Racor and the
necessary plumbing to switch between two while you are underway.

Steve


----------------------------------------------------------------
Steven Dubnoff
Circle Systems We make your data instantly usable.
Download Stat/Transfer from http://www.stattransfer.com
1001 Fourth Avenue, #3200 (206) 682-3783
Seattle, WA 98154 Fax (206) 328-4788

"Steven Dubnoff" wrote in message
...
On Tue, 25 Nov 2003 17:49:20 -0500, "Doug Dotson"
wrote:
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... What happens when a 5.5 GPM pump
(Jabsco) is pushing fuel through a filter rated at 60 GPH (RACOR 500)?

It won't pump at its rated flow. The simplest thing to do is to put
in the three valves that are necessary to bypass the pump. You can
then bypass the pump for transfer purposes and put it back when you
are running your engine.

My polishing system is totally separate from the engine system.

While you are at it, it would be good to put in an extra Racor and the
necessary plumbing to switch between two while you are underway.

I have 2 Raycors (MAX System) switchable for the engine system. The
polishing system is
totally separate with its own filter and pump.

Steve


----------------------------------------------------------------
Steven Dubnoff
Circle Systems We make your data instantly usable.
Download Stat/Transfer from http://www.stattransfer.com
1001 Fourth Avenue, #3200 (206) 682-3783
Seattle, WA 98154 Fax (206) 328-4788

"Steven Dubnoff" wrote in message
...
On Tue, 25 Nov 2003 17:49:20 -0500, "Doug Dotson"
wrote:
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... What happens when a 5.5 GPM pump
(Jabsco) is pushing fuel through a filter rated at 60 GPH (RACOR 500)?

It won't pump at its rated flow. The simplest thing to do is to put
in the three valves that are necessary to bypass the pump. You can
then bypass the pump for transfer purposes and put it back when you
are running your engine.

My polishing system is totally separate from the engine system.

While you are at it, it would be good to put in an extra Racor and the
necessary plumbing to switch between two while you are underway.

I have 2 Raycors (MAX System) switchable for the engine system. The
polishing system is
totally separate with its own filter and pump.

Steve


----------------------------------------------------------------
Steven Dubnoff
Circle Systems We make your data instantly usable.
Download Stat/Transfer from http://www.stattransfer.com
1001 Fourth Avenue, #3200 (206) 682-3783
Seattle, WA 98154 Fax (206) 328-4788

I used a general purpose replacement truck fuel pump, that pumps at
around 60GPH according to the label, but probably really at around 30gph.
It is a free-flow pump, in that the engine can draw fuel through it while
it is sitting idle. The pump draws fuel through either a single Racor
10Micron filter, or the Racor and a Fram 1 Micron, and it can be setup to
return the fuel to the thank via the fuel return line, or to the engine,
priming it. This pump is available from Car Parts Stores for around $65.

Larry DeMers
s/v DeLaMer
Cape Dory 30 Lake Superior

Steven Dubnoff wrote:

On Tue, 25 Nov 2003 17:49:20 -0500, "Doug Dotson"
wrote:
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... What happens when a 5.5 GPM pump
(Jabsco) is pushing fuel through a filter rated at 60 GPH (RACOR 500)?

It won't pump at its rated flow. The simplest thing to do is to put
in the three valves that are necessary to bypass the pump. You can
then bypass the pump for transfer purposes and put it back when you
are running your engine.

While you are at it, it would be good to put in an extra Racor and the
necessary plumbing to switch between two while you are underway.

Steve

----------------------------------------------------------------
Steven Dubnoff
Circle Systems We make your data instantly usable.
Download Stat/Transfer from http://www.stattransfer.com
1001 Fourth Avenue, #3200 (206) 682-3783
Seattle, WA 98154 Fax (206) 328-4788

I used a general purpose replacement truck fuel pump, that pumps at
around 60GPH according to the label, but probably really at around 30gph.
It is a free-flow pump, in that the engine can draw fuel through it while
it is sitting idle. The pump draws fuel through either a single Racor
10Micron filter, or the Racor and a Fram 1 Micron, and it can be setup to
return the fuel to the thank via the fuel return line, or to the engine,
priming it. This pump is available from Car Parts Stores for around $65.

Larry DeMers
s/v DeLaMer
Cape Dory 30 Lake Superior

Steven Dubnoff wrote:

On Tue, 25 Nov 2003 17:49:20 -0500, "Doug Dotson"
wrote:
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... What happens when a 5.5 GPM pump
(Jabsco) is pushing fuel through a filter rated at 60 GPH (RACOR 500)?

It won't pump at its rated flow. The simplest thing to do is to put
in the three valves that are necessary to bypass the pump. You can
then bypass the pump for transfer purposes and put it back when you
are running your engine.

While you are at it, it would be good to put in an extra Racor and the
necessary plumbing to switch between two while you are underway.

Steve

----------------------------------------------------------------
Steven Dubnoff
Circle Systems We make your data instantly usable.
Download Stat/Transfer from http://www.stattransfer.com
1001 Fourth Avenue, #3200 (206) 682-3783
Seattle, WA 98154 Fax (206) 328-4788

goggle "fuel polishing lv-ab" for starters

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