Izikulufu zokuzivala ze-O-ring ezingangeni manzi ziyizibophelelo ezintsha eziklanyelwe ukuhlinzeka ngokusebenza okukhethekile kokuvala ezinhlelweni ezidinga izakhiwo ezingangeni manzi, ezingangeni emoyeni, nezimelana nowoyela. Lezi zikulufu zifaka i-O-ring eyakhelwe ngaphakathi edala isivalo esithembekile, esivimbela ukungena kwamanzi, umoya, namafutha. Njengomkhiqizi ohamba phambili wezinsimbi zekhwalithi ephezulu, sinikeza izinhlobonhlobo zezikulufu zokuzivala ze-O-ring ezingenamanzi ezihlangabezana nezidingo eziqinile zezimboni ezihlukahlukene.