Iivalve zeBoiler zeBrass zifanelekile kwinkqubo yokufudumala.Zisetyenziselwa ukukhupha amanzi okanye ukukhulula intlenga kwibhoyila.IValve yeBoiler yeBrass inezibambo zentsimbi ukuze zisebenze lula, zivuleke zivuleke ngokuthe ngcembe kwaye zivale ngokujika okuphindaphindiweyo kwesiphatho sevili ukulungelelanisa nokulawula ukuhamba.Ezi zivalo zisebenza ngesandla zikhupha amanzi kunye nentlenga kwiibhoyila.Zonke zinesiqu esingavukiyo esihlala kwindawo enye nokuba ivalve ivuliwe okanye ivaliwe.Umbhobho ophantsi koxinzelelo kunye nezixhobo zixhathisa i-acids ezininzi, izisombululo ze-aliphatic, iziseko, i-halogens, i-oxidants, kunye neetyuwa.Ngaphandle koko, zikwasebenzisa iinjongo ezininzi njengendawo yoqhagamshelo lombhobho wenkonzo yamanzi yangaphandle.

Iivalvu zebhoyila zobhedu zibonelela ngolawulo oluthembekileyo lokuqukuqela kunye nokuhanjiswa kwamanzi kwiinkqubo zokuthengisa kunye neendawo zokuhlala kunye neenkqubo zokufudumeza , kubandakanywa iibhoyila kunye nezifudumezi zamanzi .Iivalvu zebhoyila yobhedu lolona khetho lufanelekileyo lokulawula ukuvala kwisistim yakho, eyenziwe ngeyona nto iphezulu yezixhobo kunye nomsebenzi, baya kukhonza imibhobho yakho yamanzi okanye inkqubo yokufudumeza ngokuthembekileyo.