... nitro hydrocarbons, esters, chloroform, and ketones. General use temperature range is -55 °C ~ 120 °C.IIR (butyl rubber) sealsExcellent ... nearly a hundred times higher price than ordinary rubber material is very expensive, of course, good sealing effect, and can be ... used in a very strict environment, irreplaceable.PTFE (polytetrafluoroethylene) sealsPTFE PTFE (ju4 ...