This Plastic Pump(KEXON) are high-molecular weight material is impermeable to water and generally resistant to organic solvents, acids and alkalies. It is among the lightest of the thermoplastics, and retains good physical properties even at low temperature. Polyethylene is attacked by strong oxidizing acids and chlorinated or aromatic solvents. Maximum recommended service temperature is 200°F.

The three major fluoroplastics widely used in pumps for structural parts are: polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), and ethylene chlorotrifluoroethylene (ECTFE). Each offers particular attractions. PTFE is perhaps the most inert compound known, so it can be exposed to a extremely broad range of fluids. Its maximum service temperature, 500°F, is significantly higher than that of the other two.

PVDF is stronger, stiffer and less subject to creep than PTFE. It retains strength well throughout its service temperature range. Its maximum recommended service temperature is 300°F. It is chemically resistant to most acids, alkalies (except sodium hydroxide) and organic solvents, and is equally suited for handling wet or dry chlorine, bromine and the other halogens. ECTFE has high tensile strength and impact resistance. It is inert to a broad range of acids, including the oxidizing types. It also can handle alkalies, organic solvents (and combinations of them), most other corrosive liquids, and abrasive mixtures, even when used as a coating over metals. Maximum service temperature is 300°F. All three of these fluoropolymers are suitable for applications requiring extreme purity and freedom from contamination. Examples include electronics manufacture and the handling of ultrapure water.

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