What valve seat material for U-PVC compact ball valves?

[abasi777]

Hi
I am trying to find alternative seat material instead of PTFE for use in U-PVC compact ball valve.
I am working on Thermoplastic Elastomer (TPE & TPV), but its not so good because have large compression
set and deflection.
Any suggestion for other seat material, preferably injectable and as cost effective as PTFE?
Thanks.

 

[Danlap]

Hi

Not really sure your application, R&D and or marketing strategy.
Try

https://www.jameswalker.biz/en/pdf_docs/3-o-ring-guide-issue-7

page 10 as a good start for selecting Seat material alternative vs application.

If this is for low end application (water, non-toxic/flammable, etc.), PTFE is still the most cost effective solution.

I don't quite understand three combination: U-PVC (Plastic); (I assume) Floating Ball valve and Large compression. Its not add up.
Large compression while the seat being Seated (pushed by the Ball) or during the PTFE being molded as a Seat on the manufacturing line?
Good-luck with the research

Regards,
MR

All valves will last for years, except the ones that were poorly manufactured; are still wrongly operated and or were wrongly selected