I-Flangedamavalvu esangoziwuhlobo lwevalvu yesango exhunywe ngama-flange. Zivuleka futhi zivalwe kakhulu ngokunyakaza okuqondile kwesango eceleni komugqa ophakathi nendawo futhi zisetshenziswa kabanzi ekulawuleni ukuvala kwezinhlelo zamapayipi.

(Isithombe:I-valve yesango le-flanged yensimbi yekhabhoniDN65)

Izinhlobo zayo zingahlukaniswa ngezigaba ezimbili ngokusekelwe ezicini zesakhiwo: ngokwesimo sokunyakaza kwesiqu sesango, kunezinhlobo zesiqu esiveziwe kanye nezinhlobo zesiqu esifihliwe. Lapho ivalvu yesango lensimbi eveziwe ivuliwe noma ivaliwe, isiqu sidlula esivalweni sevalvu, okuvumela ukubonwa okuqondile kwezinga lokuvula. Ifanele izimo ezidinga ukuqapha ngesikhathi sangempela, njengeziteshi zamanzi zikamasipala kanye neziteshi zokupompa amanzi. Isiqu sesondo lesandla sevalvu yesango lesiqu esifihliwe asidluli esivalweni sevalvu. Inesakhiwo esiqinile futhi ifaneleka ngezikhathi ezivinjiwe njengezindawo zombhobho ongaphansi komhlaba kanye nezitshalo zamakhemikhali ezinemishini exinene. Ngokwesakhiwo seplate yesango, kunezinhlobo ze-wedge kanye nohlobo oluhambisanayo. Iplate yesango le-wedge inomumo we-wedge, inokulingana okuqinile kokuvala, futhi ifanele izimo zokusebenza ezicindezelekile eziphakathi nendawo neziphezulu (PN1.6~16MPa). Phakathi kwazo, iplate yesango elastiki ingavala isikhala sokushisa futhi ivame ukusetshenziswa kumapayipi okuthutha umusi kanye namafutha ashisayo. Amaplate esango ahambisanayo anezinhlangothi ezimbili ezihambisanayo futhi avalwe yingcindezi ye-medium. Zisetshenziswa kakhulu ezimweni ezinomfutho ophansi kanye nobubanzi obukhulu obunobubanzi obuyi-DN300 noma ngaphezulu, njengemipayipi emikhulu yokuhambisa amanzi. Zinokumelana okuphansi kokuvula nokuvala futhi zilungele ukusebenza njalo.

Ekusetshenzisweni, ngenxa yokuzinza okuvelele kanye nokusebenza okunqunyiwe kokuxhumeka kwe-flange, zisetshenziswa kabanzi ezimbonini eziningi: uhlobo lwenduku efihliwe noma uhlobo lwepuleti lesango elihambisanayo luvame ukusetshenziswa ekuhlinzekweni kwamanzi nokukhipha amanzi kamasipala kanye nokwakha, kanye namapayipi okuvikela umlilo. Embonini yamakhemikhali, amavalvu esango le-wedge stem avame ukusetshenziswa emapayipini okuthutha uwoyela ongahluziwe kanye nemikhiqizo kawoyela ocwengekile ngaphansi kwezimo zokucindezela okuphezulu. Emkhakheni wamandla namandla, amavalvu esango le-wedge elinwebekayo anokumelana okungcono kokushisa avame ukukhethwa ukuze kusetshenziswe amanzi okupholisa esiteshini samandla kanye namapayipi omusi webhoyila. Amavalvu esango le-parallel elinokucindezela okuphansi anokumelana okunamandla nokungcola afanelekela amanzi angcolile ezimbonini kanye nezinhlelo zamanzi ajikelezayo ekusetshenzisweni kwensimbi nasekuphathweni kwamanzi. Lapho ukhetha, kufanele kucatshangelwe ukucindezela, isikhala kanye nezici eziphakathi nendawo. Ukusebenza kwayo okuthembekile kuyenza ibe yingxenye yokulawula eyinhloko yezinhlelo zamapayipi ezimbonini ezahlukahlukene.

Ukukhetha uhlobo lwamavalvu esango acwebezelayo kudinga ukucabangela ingcindezi, isikhala kanye nezici eziphakathi nendawo. Ukusebenza kwayo okuthembekile kokuvala kwenza kube yingxenye yokulawula eyinhloko ezinhlelweni zamapayipi ezimboni ezahlukahlukene. Uma unezidingo ezihlobene, sicela usithinte ngezansi. Njengomkhiqizi wamavalvu esango lezimboni oneminyaka engu-20 ubudala, i-Jinbin Valve ikunikeza izixazululo zobungcweti. (I-Gate Valve Enamanani)