Ivalvu yokuphepha iyisici esibalulekile kunoma yiluphi uhlelo olucindezelwe, ikakhulukazi ezinhlelweni zomusi, lapho ukugcina amazinga okucindezela aphephile kubaluleke kakhulu. Ivalvu Yokuphepha ye-DIN yezinhlelo zomusi inamathela ezindinganisweni ezibekwe yi-Deutsches Institut für Normung (DIN), inhlangano yaseJalimane ephethe ukuthuthukisa amazinga obuchwepheshe. Lawa mavalvu aklanyelwe ngqo ukuvikela imikhumbi yokucindezela kanye nama-boiler omusi ekudluleni ukucindezela okuphezulu okuvunyelwe, okungaholela ekwehlulekeni noma ezingozini ezinkulu. Izindinganiso ze-DIN zinikeza iziqondiso ezibalulekile zokuklama, ukusebenza, kanye nokuhlolwa kwamavalvu okuphepha, ukuqinisekisa ukuthembeka nokuphepha.