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Parts: "Inner &Out Rings: PTFE/PVDF
Feature: PTFE & PVDF have excellent performance of acid & alkali resistance. Special the PTFE which has the best performance of anti-acid and anti corrosion compare to all other plastic material. It peroformance excellent in very strong acid & very strong alkali (including HF and smoke formation H2SO4 HNO3 or HCL 98% up). It is also applicable at high temperature (PTFE 180℃ & PVDF150℃).