Ivalve yebhabhathane ye-U-icandelo lokutywinwa kwe-Bidirectional, ukusebenza okugqwesileyo, ixabiso elincinci le-torque, linokusetyenziswa ekupheleni kombhobho wokukhupha ivalve, ukusebenza okuthembekileyo, umsesane wokutywina wesitulo kunye nomzimba wevalvu zidityaniswe ngokudibeneyo ube mnye, ukuze ivalve ibe nexesha elide. ubomi benkonzo