حلقات O من HNBR 0.139 بوصة CS × 5.484 بوصة ID | AS568-254 | داش 254 | صلابة 80 (12 / عبوة)

I was a bit skeptical about the high-temperature rating, but these HNBR o-rings held up perfectly in my hot oil system. The 0.139" cross-section seated easily in the groove without any twisting.

Popped one of these into a high-temp pneumatic actuator on Friday and it’s holding pressure perfectly after a week of cycling at 250°F. The 80 durometer feels noticeably firmer than the standard Buna-Ns I’ve been using, which is exactly what I needed for this application.

Finally found HNBR o-rings that fit my high-temp valve application, and these AS568-254s seat perfectly. The 80 durometer feels solid, and they handled the 250°F steam without any swelling.