Full definition
Seal engineered for extremely low temperatures down to -200 °C. Materials: PTFE (retains flexibility to -200 °C), PCTFE (Kel-F), cryogenic-grade FKM. Applications: liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, liquid hydrogen. Core challenge: conventional elastomers become rigid and brittle below -50 °C, requiring special polymer selection and face design.