I-valve yesango ibhekisela ku-valve lapho ilungu lokuvala (isango) lihamba khona ngendlela eqondile yomugqa ophakathi nendawo. I-valve yesango ingasetshenziswa kuphela ekuvalekeni okuvulekile nokuvalwe ngokuphelele epayipini, futhi ayikwazi ukusetshenziselwa ukulungisa nokubopha. I-valve yesango uhlobo lwe-valve olunezinhlobonhlobo zokusetshenziswa. Ngokuvamile, amadivayisi okusika e-DN50 akhethwa ukusetshenziswa, futhi ngezinye izikhathi ama-valve esango asetshenziselwa amadivayisi okusika anobubanzi obuncane. I-valve yesango isetshenziswa njengendlela yokusika, futhi ukugeleza konke kuqondile uma ivuliwe ngokugcwele. Ngalesi sikhathi, ukulahlekelwa kwengcindezi yendawo kuncane kakhulu. Ama-valve esango ngokuvamile afaneleka ezimweni zokusebenza ezingadingi ukuvulwa nokuvalwa njalo futhi agcine isango livulekile noma livaliwe ngokuphelele. Akufanele ukusetshenziswa njengomthetho noma ukugoqa. Ku-medium ehamba ngesivinini esikhulu, isango lingabangela ukuguguleka kwesango lapho livuliwe kancane, futhi ukuguguleka kungalimaza ubuso bokuvala besango kanye nesihlalo se-valve, futhi ukugoqa kuzobangela ukuthi isango liguguleke yi-medium.
Kusukela ekwakhekeni kwesakhiwo, umehluko omkhulu uhlobo lwento yokuvala esetshenziswayo. Ngokwesimo sezinto zokuvala, amavalvu esango avame ukuhlukaniswa ngezinhlobo eziningana ezahlukene, njenge: ivalvu yesango le-wedge, ivalvu yesango elihambisanayo, ivalvu yesango elihambisanayo eliphindwe kabili, ivalvu yesango elihambisanayo eliphindwe kabili, njll. Amafomu asetshenziswa kakhulu amavalvu esango le-wedge namavalvu esango elihambisanayo.
Isango linezindawo ezimbili zokuvala. Izindawo ezimbili zokuvala zevalvu yesango le-wedge esetshenziswa kakhulu zakha i-wedge. I-angle ye-wedge iyahlukahluka ngokwemingcele yevalvu, ngokuvamile ama-degree ama-5. Isango levalvu yesango le-wedge lingenziwa libe yi-whole, elibizwa ngokuthi isango eliqinile; lingenziwa futhi libe isango elingadala ukuguguleka okuncane ukuthuthukisa ukukhiqizwa kwalo futhi lilungise ukuphambuka kwe-angle yesango lokuvala ngesikhathi sokucubungula. Ipuleti libizwa ngokuthi isango elinwebekayo.
Uma ivalvu yesango ivaliwe, indawo yokuvala ingathembela kuphela ekucindezelweni okuphakathi ukuze ivalwe, okungukuthi, ithembele ekucindezelweni okuphakathi ukuze icindezele indawo yokuvala yesango esihlalweni sevalvu ngakolunye uhlangothi ukuqinisekisa ukuvalwa kwendawo yokuvala, okuzivala ngokwayo. Amavalvu amaningi esango asebenzisa ukuvalwa okuphoqelelwe, okungukuthi, lapho ivalvu ivaliwe, isango kumele liphoqelelwe esihlalweni ngamandla angaphandle ukuqinisekisa ukuqina kwendawo yokuvala.
I-valve yesango ye-valve yesango ihamba ngokuhambisana ne-valve stem, ebizwa ngokuthi i-lifting stem gate valve (ebizwa nangokuthi i-rising stem gate valve). Ngokuvamile kuba nentambo ye-trapezoidal entongeni yokuphakamisa, nge-nut ephezu kwe-valve kanye nomsele wokuqondisa emzimbeni we-valve, ukunyakaza okujikelezayo kuguqulwa kube ukunyakaza okuqondile, okungukuthi, i-torque yokusebenza iguqulwa ibe yi-operating thrust.
Uma ivalvu ivuliwe, lapho ukuphakama kwesango kulingana nobubanzi bevalvu obuphindwe ka-1:1, indlela yoketshezi ivulwa ngokuphelele, kodwa lesi simo asikwazi ukubhekwa ngesikhathi sokusebenza. Ekusetshenzisweni kwangempela, i-top of the valve stem isetshenziswa njengophawu, okungukuthi, indawo lapho ingenakuvulwa khona, njengendawo yayo evulekile ngokuphelele. Ukuze kucatshangelwe isenzakalo sokukhiya ngenxa yokushintsha kwezinga lokushisa, ivame ukuvulelwa endaweni ephezulu, bese ijika emuva ngo-1/2 ~ 1, njengendawo yevalvu evulekile ngokuphelele. Ngakho-ke, indawo evulekile ngokuphelele yevalvu inqunywa yindawo yesango (okungukuthi, i-stroke).
INortech ingenye yabakhiqizi bama-valve ezimboni abahamba phambili eShayina abanesitifiketi sekhwalithi se-ISO9001.
Isikhathi sokuthunyelwe: Agasti-16-2021