Polymers for water systems
PVDF
Pure-water, chlorine/ozone resistant
PP
Broad chemical, low cost
PTFE
Strong acid/alkali, pure duty
UHMW-PE
Wear rails, low friction
Typical parts
| System | Polymer / part |
|---|---|
| Ultrapure water | PVDF headers, fittings, valve parts |
| Membrane | PVDF/PP housings, UHMW guides |
| Wastewater | PP/PTFE linings, seals |
| Desalination | PVDF, PTFE corrosion parts |
Why PVDF for pure water
PVDF resists oxidizers (chlorine, ozone) and keeps extractables low, making it a default for ultrapure-water loop components.
Frequently asked questions
Best plastic for pure water?
PVDF — resists oxidizers and keeps extractables low.
PP vs PVDF?
PP is cheaper for general duty; PVDF for oxidizer/ultrapure service.
Can you machine custom fittings?
Yes, to drawing in PVDF/PP/PTFE/UHMW.