O-Ring compatibility for fuel?

[jhilb]

Need to replace the o-rings on my inline fuel pump case. I know Viton is compatible with direct contact to fuel, is Nitrile?

20160724_101432.jpg

[Boydster]

Nitrile, also known as BNR and Buna-N, is good for petroleum fuels.

[PeteH]

Nitrile in today's fuels will swell considerably in a short time. This comes from years of experience in oil and gas pipeline work. Viton is the best choice.

[jhilb]

thanks!

[CraigS]

Here is a source for this type of info
http://www.mcmaster.com/#orifices/=13fmx2m
Note the column on the left "For use with". These guys are great for info on nearly any material.

[Boydster]

This is the ref I've used for a while on everything to do with oring seals.

http://www.sealdynamics.com/o-ring-reference.pdf