Habonim”s HermetiX is a patented stem seal designed to maintain zero stem leak and provide maintenance-free service. Named after its X-shaped design, the HermetiX meets the latest ISO 15848-1 standard for fugitive emission, covering performance CO5 (5k cycles), and class BH for temperature ranging from -29 C to +200 C. The seal”s flexible X-shape design and dynamic action enables improved performance as pressure increases. This feature is particularly beneficial in situations of stem side load. The most significant advantage of HermetiX over standard rectangular-shape stem seals is that stem packing integrity is maintained even when stem spring preload has relaxed over time as a result of the erosion of soft parts. Hermetix is now being incorporated as Habonim’s new standard stem seal in most of its standard ball valve line.