Difference between AFLAS O-RING and BUNA O-RING

[pooyishka]

Can we substitue AFLAS O-Ring with BUNA O-Ring?

 

[1gibson]

Probably not

 

[DRWeig]

I'll say "probably not, but maybe." Depends entirely on the fluid, pressure, and temperature.

Good on ya,

Goober Dave

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[pooyishka]

Ok, thank you very much for your help. What is the usage for BUNA O-Ring?

 

[btrueblood]

"What is the usage for BUNA O-Ring?"

Cheap stuff that you don't mind having leak past the o-ring.

More seriously, google "Parker O-ring Handbook", download it, read it, and become an o-ring expert very quickly.

 

[SNORGY]

The industry trend in my area of interest (upstream oil and gas) is to specify the Aflas in moderately sour service and / or in amine service. Buna does not last as long or perform as well in those services, apparently.

 

[unclesyd]

There is a world of difference in the materials, Aflas being a Fluoropolymer and Buna-N being a Nitrile Rubber. Though both have their limitations the Aflas covers more ground, though at a higher cost.
A key point is if you are able, is to check it out in the fluid you are going to exposed to. A simple immersion test will tell you a lot as most charts are for pure materials.

http://www.aflas.com/default.html

 

[SJones]

Check out ISO 23936-2

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04