I am reviewing ball valve specs from supplier in China and they are using seals made of polyphenyl PPL. I can find little or no information on this material to judge is suitability for use on boiler and pressure vessel piping. The valve supplier sent me a spec sheet that is little or no use. Anyone have any info on this stuff?
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polyphenyl (PPL)
- Thread starter pmolvie
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btrueblood
Mechanical
Very hard to say, as polyphenyl(ene) is a precursor chemical, not a polymer in and of itself. They could actually be using one of a number of polymers using that backbone, among them polyphenylene oxide (PPO), --- sulfide (PPS), polyphenyl sulfone (PPSU), and probably others I've never heard of.
The only hit I find for "polyphenyl PPL" is this one. Shows that it's modified PTFE and gives the properties.
Chris DeArmitt - PhD FRSC
Plastics & Materials Consulting
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Chris DeArmitt - PhD FRSC
Plastics & Materials Consulting
Plastic Training Seminars
Paulkuklych
Mechanical
This material might be suitable (attached)
Paul Kuklych
Paul Kuklych
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