nylon and veg

For discussing the modifications needed for diesel vehicles to run with 2 tank veggie oil conversions.

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nylon and veg

Postby flysurge » Tue Dec 09, 2008 7:43 am

will veg attack nylon hose and fittings??
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Postby SunWizard » Tue Dec 09, 2008 8:47 am

No. See this thread for all materials compatibility:
http://www.burnveg.com/forum/viewtopic. ... patibility
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
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Postby flysurge » Tue Dec 09, 2008 9:57 am

thanks sun
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Postby Burbarian » Tue Dec 09, 2008 10:16 am

I use nylon tubing and fittings everywhere. They're cheap and pretty tough. Nylon tubing is not as flexible as rubber, as it is rigid and vacuum rated. It provides a nearly constant volume with minimal swell or shrink due to pressure or vacuum applied unlike rubber hose. Can be solvent and adhesive bonded. For light applications, superglue is adequate.
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Postby hheynow » Tue Dec 09, 2008 12:15 pm

I though of using nylon fittings in my Mercedes conversion but found a better material called PVDF ( Polyvinylidene Fluoride) in the usplastics.com website HERE. It's a bit more money than nylon, but is as bullet proof as my car.


The nylon is rated from -40 to 200*F
The PVDF is rated from -80 to 275*F and described as "Offers the ultimate chemical and abrasive resistance and strength."
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Postby Burbarian » Tue Dec 09, 2008 2:45 pm

I'm pretty comfortable using nylon. Nylon 6 has a softening temperature of 170C and melting temp at 215C. Nylon 6/6 softens at 210C and melts at 255C. PVDF has a softening temperature of 140C and melts at 170C. For the chemicals and solvents we are dealing with (vo, diesel, kerosene, gasoline, turpentine) both are compatible. Nylon is also immune to acetone, which attacks PVDF. Perhaps US Plastics uses a different formulation for their nylon.
From Grainger: http://www.grainger.com/Grainger/items/1ZJU4
Operating temperature range of nylon fittings is -50F to 275F. Granted, I'm not familiar with PVDF in actual ussage, so it may indeed be far superior in practice than nylon. However, I have been using nylon fittings for a long time and quite familiar with it. As always, you go with your comfort level.
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1971 Waldon 4100 loader
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