Piping of highly pure, chemically resistant Teflon® PFA HP helps prevent contamination of ultrapure fluids. Piping can be joined by thermal welding or with flare-type connections. Dual containment constructions are available for added protection against leaks and contamination.
Tanks and Containers
Teflon® PFA HP and Teflon® PTFE are used to line or form tanks and containers for storing and dispensing ultra-pure and aggressive chemical fluids. Suppliers can deliver chemicals in returnable drums lined with Teflon®. For applications involving pressure, metal or reinforced-plastic tanks can be lined with Teflon® PFA HP. Teflon® resins are compatible with virtually all chemicals to help protect fluid purity.
BCD system piping is connected with fittings of Teflon® PFA HP. Typical systems use pumps, pressure regulators and valves, and automated systems require valves that can be remotely actuated. These components are available with all wetted surfaces made from Teflon® PFA HP or Teflon® PTFE to provide the required high level of protection against contamination.
For removing particulate from fluids, Teflon® PTFE is used as a filter medium where extremely high chemical resistance and purity required. Teflon® PFA HP is used for chemically resistant, high purity filter housings.
For BCD systems, capacitive-type sensors shielded in dip tubes of high-purity Teflon® PFA HP monitor fluid levels in tanks. Other designs can sense through walls of tanks or pipe made from Teflon® PFA HP. Connecting electrical cables are jacketed with Teflon® PFA for additional protection agains contamination.