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Plastic Quick Disconnect fuel line adapters..

Started by ducatiz, June 08, 2015, 12:11:14 PM

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ducatiz

June 08, 2015, 12:11:14 PM
Caveat emptor:

There are some very inexpensive QD connectors being sold for gas lines, they are made of hypalon.  This is not compatible with gasoline use.  All the ones I've seen are BLACK in color. 

Hypalon gets an "unsatisfactory" rating for use with all gasolines

http://mykin.com/rubber-chemical-resistance-chart-3
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

MotoPsycho

#1
June 08, 2015, 01:04:40 PM
You'll pay for it but these are the mostest bad ass QD's I've seen yet.

http://www.racerpartswholesale.com/product/11344/Motorcycle_Jiffy_Tite_Fuel_Line_Disconnects#reviews
Edgar: '99 M750 - 2009 Indy Ducati Rat Bike Award Winner

jduke

#2
June 08, 2015, 02:14:10 PM
^^^^^ 100% correct!! Metal, don't use o-rings so you never have to worry about that.

battlecry

#3
June 08, 2015, 05:36:05 PM
Thanks, ducatiz.  Acetal QDs from Colder Industries have worked fine for years on my bike.  They are white in color.  DuPont's Delrin (Acetal) design information gives the material excellent fuel resistance rating, even alcohol blends.  Was concerned about high temperature under the tank but as long as there is fuel in the line or flowing through the fitting, temps should be acceptable.   Cheaper (and lighter, if that rocks your boat) than the metal.

ducatiz

#4
June 08, 2015, 07:40:31 PM
There are plenty of good plastics which are fuel resistant and also have no issues with ethanol. 

I think it's hard to argue against the metal ones, but the price point is huge versus the acetal type (like Motion Pro sells).

The point is that people are selling QDs made from Hypalon (and who knows what else) without any understanding how fuel will attack some plastics and it will cause a catastrophe.

One seller had a 5/16" QD that has a cutoff in both sides -- nice feature -- for only $12!  I got the item and was curious what plastic it was -- emailed them and they had no idea.  Dug around and found out who made them and that it was Hypalon.  No thank you, sir.

I informed him of the issue and his response was a curt "well, no one has mentioned a problem" -- sure, not in the 6 months you've been selling them. 
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

Howie

#5
June 08, 2015, 09:05:34 PM
Hypalon + gasoline should be good for lawyers :P

ducatiz

#6
June 09, 2015, 08:22:37 AM
Quote from: howie on June 08, 2015, 09:05:34 PM
Hypalon + gasoline should be good for lawyers :P

lol, not this one.

i'd rather not represent clients who are the family members of someone who burned to death on a bike.  i mean, i'd rather they not get to that point!!
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

oldndumb

#7
June 10, 2015, 05:51:08 AM
Good info not readily available elsewhere.  [thumbsup]

My initial thought upon reading this is that the QD material is another item to be inspected and verified when buying a used bike.

The only problem is that I am not certain how you can tell the difference between the Hypalon and Acetal ones? Color is not a good indicator because I have bought Acetal rounds in black and white.

???

ducatiz

#8
June 10, 2015, 02:40:43 PM
That's a real problem.  I know the Motion Pro have a CPC logo on the metal lock portion which is the manufacturer.

None of the black plastic ones I've seen are the correct material.

Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

MotoPsycho

#9
June 10, 2015, 09:39:10 PM
I worked at a plastic factory 20 years ago that made parts out of Acetal(Delrin). It's pretty hard and somewhat brittle under the wrong use. What makes it attractive ad QD's for fuel line is it has a high lubricity and wears very well. It's what they use for drawer rollers and roller wheels for sliding closet doors. I'd bet if you used the back of a pocket knife blade, it wouldn't sliver off like HDPE or Polyprolylene.

"Hypalon® is the registered trademark for a series of chlorosulfonated polyethylene synthetic rubbers manufactured by DuPont Dow Elastomers."

It's is commonly used in electrical wire sheathing it says later in that document.


Says good petroleum resistance. For me good is not adequate. I need excellent.
Edgar: '99 M750 - 2009 Indy Ducati Rat Bike Award Winner

ducatiz

#10
June 11, 2015, 07:53:24 PM
Quote from: MotoPsycho on June 10, 2015, 09:39:10 PM

Says good petroleum resistance. For me good is not adequate. I need excellent.

Check the link out I posted in the first message -- they rate Hypalon's gasoline performance as "unsatisfactory"..

I gues it depends, but I just don't see anyone championing using it for fuel fittings except cheap sellers on Ebay....
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

MotoPsycho

#11
June 12, 2015, 07:37:35 AM
I forgot I read that at the beginning and then looked up the other one. The one I posted though was from the manufacturer of hypalon.

Either way, polyethylene is not good for gas fittings. The delrin ones are pretty good IMO, but if I'm dumping that much money in a project, might as well spend the money on the metal ones. Just my opinion. And opinions are like buttholes...
Edgar: '99 M750 - 2009 Indy Ducati Rat Bike Award Winner

SpikeC

#12
June 12, 2015, 02:58:57 PM
 After I broke a plastic QD I spent the money and acquired metal dry-break QDs. They are a one time purchase, give a nice sence of security, and make pulling the tank sooooo easy!
Spike Cornelius
  PDX
   2009 M1100S Assorted blingy odds and ends(now gone)
2008 Bimota DB5R  woo-Hoo!
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