Ivalve yesango lemela ilungele udaka kunye nombhobho ophakathi oqulethe ifayibha, kwaye ipleyiti yevalvu yayo inokusika imathiriyeli yefayibha phakathi; isetyenziswa kakhulu ekuhambiseni uludaka lwamalahle, i-mineral pulp kunye ne-papermaking slag slurry pipeline. Ivalve yesango lemela iphuma kwivalve yesango, kwaye ineengenelo zayo ezizodwa kunye nezibi.1, Yeyona mveliso yevalvu ekhethwayo yodaka, oludaka kunye nombhobho wepulp. 2. Isakhiwo esilula, umthamo omncinci, ubunzima obulula kunye nofakelo olufanelekileyo. Ukungalungi kwevalve yesango lomese: inokusetyenziswa kuphela kumbhobho woxinzelelo oluphantsi. Ivalve yesango lemela isetyenziswa kakhulu kumbhobho wodaka, onokuthiwa sisivalo esikhethekileyo sombhobho wodaka.