Izingxenye zokuvula nokuvala ze-valve yokumisa ziyi-disc emise okwepulaki, indawo yokuvala iphansi noma i-conical, futhi i-disc ihamba ngomugqa oqondile phakathi komugqa ophakathi noketshezi. Ifomu lokunyakaza lenduku ye-valve lihlanganisa uhlobo lwenduku yokuphakamisa (induku ye-valve iyaphakanyiswa futhi isondo lesandla aliphakanyiswa) kanye nohlobo lwenduku ejikelezayo ephakamisayo (isondo lesandla liyazungezwa futhi liphakanyiswe kanye nenduku ye-valve, futhi nati ivuliwe. umzimba we-valve). Umsebenzi we-valve yokumisa usebenza kuphela ekuvuleni okugcwele nokuvala okugcwele, futhi akuvunyelwe ukulawula nokudonsa. Lokhu ikakhulukazi kunqunywa izici ze-valve yokumisa, kanje: