What size is this fuel line?

[Light in the Dark]

I may look into using this the next time I need to replumb. I like the fact that its blue, makes it stand out as an upgrade to me, in the machine enclosure. Thanks for the info.

 

[2Pbfeet]

I may look into using this the next time I need to replumb. I like the fact that its blue, makes it stand out as an upgrade to me, in the machine enclosure. Thanks for the info.

You are welcome.

I have a CAT3126 that came with what looks like this material on the engine. I had wondered why blue until I found that material looking for FFKM for an '803. For what Caterpillar charges for the tubing it should be FFKM...

All the best, 2PbFeet

 

[87cr250r]

Silicones are highly permeable and will sweat if used for oil service. I don't know if fluorosilicone FVMQ is less permeable.

 

[2Pbfeet]

Silicones are highly permeable and will sweat if used for oil service. I don't know if fluorosilicone FVMQ is less permeable.

Thanks for catching that mistake of mine above.

This suggests FVMQ is almost as good as FKM, and a number tubing manufacturers list FVMQ as oil and diesel compatible.

Https://eurocorr.efcweb.org/2014/abstracts/16/7072.pdf

Do you know of a source for FFKM tubing?

All the best,

2PbFeet

 

[87cr250r]

FKM, Viton, is sufficient for all fuels you'll burn in a diesel engine, including biodiesel.
FFKM, Kalrez, would cost $100's per inch and has poor performance at low temperatures.