0.139" CS × 4.109" ID PTFE O型環 | AS568-243 | Dash 243 | 硬度24 (125 / 包)

I needed a high-temp seal for a valve stem, and these PTFE rings handled the 400°F steam without any deformation. The 24 durometer is soft enough to seat perfectly but firm enough to hold pressure tight.

These o-rings have been working perfectly in our high-temp steam lines, the -350°F to +500°F range is exactly what we needed. They sealed tight on the first try and show no signs of wear after two weeks.

Finally, an o-ring that handles my cryo line without getting brittle—the -350°F rating matched exactly what I needed. The 24 durometer is noticeably softer than standard PTFE, which made seating it in the groove a breeze.