Ivalve ye-welded diaphragm yebakala lokutya ilawulwa ukude ngesixhobo sokuqhuba okanye iqhutywe ngesandla ngesiphatho.Isixhobo sokuqhuba sinemigangatho emithathu: uhlobo oluqhelekileyo oluvaliweyo, uhlobo oluqhelekileyo oluvulekileyo kunye nohlobo lwegesi.Ineenzuzo zesakhiwo esilula, inkangeleko enhle, ukuchithwa ngokukhawuleza kunye nokuhlanganisana, ukusebenza okuguquguqukayo, ukuxhathisa ulwelo oluncinci, ukusetyenziswa okukhuselekileyo nokuthembekileyo, njl njl. Kufanelekile ukulawula amanzi, igesi, ioli kunye neendaba ezitshabalalisayo kwishishini lemichiza, i-petroleum. , isinyithi, ukufudumeza kwamanzi, ukutya, amayeza kunye namanye amashishini.