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  #11   Report Post  
Old November 26th 03, 04:30 AM
jlp2550
 
Posts: n/a
Default Fuel transfer/polishing pump

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



  #12   Report Post  
Old November 26th 03, 04:48 AM
Steven Dubnoff
 
Posts: n/a
Default Fuel transfer/polishing pump

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

  #13   Report Post  
Old November 26th 03, 04:48 AM
Steven Dubnoff
 
Posts: n/a
Default Fuel transfer/polishing pump

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

  #14   Report Post  
Old November 26th 03, 04:51 AM
Doug Dotson
 
Posts: n/a
Default Fuel transfer/polishing pump

Unfortunately that fuel clogs up the filters. That is the entire problem.
Having clean fuel in the engine fuel system avoids the problem.

Doug

"jlp2550" wrote in message
...
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





  #15   Report Post  
Old November 26th 03, 04:51 AM
Doug Dotson
 
Posts: n/a
Default Fuel transfer/polishing pump

Unfortunately that fuel clogs up the filters. That is the entire problem.
Having clean fuel in the engine fuel system avoids the problem.

Doug

"jlp2550" wrote in message
...
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







  #16   Report Post  
Old November 26th 03, 04:52 AM
Doug Dotson
 
Posts: n/a
Default Fuel transfer/polishing pump

I don't have a filter problem, I have a pump question.

Doug

"Lew Hodgett" wrote in message
hlink.net...

"Doug Dotson" writes:
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)?


Have built the system above which BTW, uses a lot of 1/2" bronze ball
valves.

You solve the filter problem in a straight forward fashion.

Multiple filters (Larger than 500) in parallel to reach at least 60 GPH.

I'd built in a safety margin and shoot for at least 75 GPH.

HTH


--
Lew

S/A: Challenge, The Bullet Proof Boat, (Under Construction in the

Southland)
Visit: http://home.earthlink.net/~lewhodgett for Pictures




  #17   Report Post  
Old November 26th 03, 04:52 AM
Doug Dotson
 
Posts: n/a
Default Fuel transfer/polishing pump

I don't have a filter problem, I have a pump question.

Doug

"Lew Hodgett" wrote in message
hlink.net...

"Doug Dotson" writes:
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)?


Have built the system above which BTW, uses a lot of 1/2" bronze ball
valves.

You solve the filter problem in a straight forward fashion.

Multiple filters (Larger than 500) in parallel to reach at least 60 GPH.

I'd built in a safety margin and shoot for at least 75 GPH.

HTH


--
Lew

S/A: Challenge, The Bullet Proof Boat, (Under Construction in the

Southland)
Visit: http://home.earthlink.net/~lewhodgett for Pictures




  #18   Report Post  
Old November 26th 03, 04:58 AM
Doug Dotson
 
Posts: n/a
Default Fuel transfer/polishing pump

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



  #19   Report Post  
Old November 26th 03, 04:58 AM
Doug Dotson
 
Posts: n/a
Default Fuel transfer/polishing pump

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



  #20   Report Post  
Old November 26th 03, 05:15 AM
Doug Dotson
 
Posts: n/a
Default Fuel transfer/polishing pump

See below.

"jlp2550" wrote in message
...
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.


And it all gets sucked into the polishig system at the same time which has
a flow rate many times that of the engine. End result is that the crap load
into the engine system is much less. Also, after bouncing around long enough
to filter that tank, I switch to the other tank and filter that while still
bouncing
around so that next time the fuel is pretty very clean.

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


Go ahead.




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






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