Selection of Valve lining Elastomer!!

[Sandeep1970]

I am wondering what will be the best suitable elastomer (Buna-N, EPDM, PVC or something else) for rubber seat/ lining. The fluid being either Acid (0.2% wt HCL) or 1% wt. NaOH. Temperature may vary between 5 -40 C. A quick reply is highly appericiated. Thanx

 

[rnd2]

natural soft or hard rubber or polyurethane appear suitable materials up to 65 deg. C
You will need to run the question opast the actual supplier so that they can offer their best grade.

 

[EdStainless]

The problem that you have is with the pH range some fillers may not be stable.
I would be more worried about hte fillers than the elastomer.
Ask the supplier lots of questions.

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