I-Open-rod/dark-rod nodular cast iron flange gate valve iwuhlobo lwensimbi eyi-nodular cast iron eyenziwe nge-valve yesango le-flange, enamandla amakhulu, ukumelana nokugqoka nokusebenza okuhle kokuzamazama komhlaba. Lolu hlobo lwe-valve lusetshenziswa kabanzi emishinini ehlukahlukene yokwakha, i-petroleum, imboni yamakhemikhali, ukwelashwa kwamanzi kanye neminye imikhakha ukuze kuzuzwe ukunqunywa, ukujikeleza kanye nokulawulwa kwemidiya yamapayipi.
Induku evulekile/induku emnyama amavalvu esango lensimbi ye-ductile iron flange ahlanganisa i-DN250, i-DN300, i-DN400, i-DN500, i-DN600, i-DN700, i-DN800 ne-DN900 kanye nabanye osayizi ukuhlangabezana nezidingo zokuxhuma zamapayipi ahlukene. Imodi yokuxhuma ye-valve ukuxhumana kwe-flange, okulula ukuyifaka nokuyigcina.
Induku evulekile kanye nenduku emnyama yizindlela ezimbili zokusebenza ze-nodular cast iron flange gate valve. Ukusebenza kwenduku evulekile kusho ukuthi ukuvuleka nokuvalwa kwe-valve kusebenza ngokuqondile esiqwini se-valve ngesondo lesandla, futhi ukusebenza kunembile futhi kulula. Ukusebenza kwenduku efihliwe ukuguqula ukunyakaza okuzungezayo kwesondo lesandla ngenati le-valve stem libe ukunyakaza komugqa oqondile wesiqu se-valve, ukuze i-valve ivuleke noma ivalwe. Ukusebenza kwenduku emnyama kuzinzile kunokusebenza kwezinduku ezivulekile, ezifanele ukucindezela okuphezulu, ama-valve amakhulu obubanzi.
Ngokuvamile, i-valve yesango ye-ductile yensimbi evulekile ye-ductile iron flange enezimfanelo zayo ezinhle kakhulu kanye nokucaciswa kosayizi okuhlukahlukene, okusetshenziselwa kabanzi kuzo zonke izinhlobo zamaphrojekthi, ukuze kusebenze okuphephile nokuthembekile kwesistimu yepayipi inikeza isiqinisekiso esiqinile.
