RPTFE vs PEEK ball valve seal

[unkwon221988]

Hi guys which one is better for use, RPTFE or PEEK, operating pressure is 60 bar temp is around 70 C, what are the pressure/temperature rating of each seats?

 

[GBTorpenhow]

RPTFE should be fine. For more complete opinion provide some fluid service information.

See reference P-T charts in the below:

https://a-tcontrols.com/Uploads/Applications/12/SoftSeatWHITEPAPER.pdf

 

[unkwon221988]

Thanks GBTorpenhow.

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[EngrPaper]

As long as both are okay for pressure and service, I would go with RPTFE. PEEK is great at high pressure, but can be a bear to turn (really stiff seat).