I-Flangedama-valve esangoziwuhlobo lwevalvu yesango exhunywe ngama-flange. Ngokuyinhloko zivula futhi zivale ngokunyakaza okuqondile kwesango eduze komugqa omaphakathi wephaseji futhi zisetshenziswa kakhulu ekulawuleni ukuvala kwezinhlelo zamapayipi.

(Isithombe:I-Carbon steel flanged i-valve yesangoI-DN65)

Izinhlobo zayo zingahlukaniswa zibe izigaba ezimbili ngokusekelwe ezicini zesakhiwo: ngokusho kwefomu lokunyakaza kwesiqu sesango, kukhona i-stem eveziwe kanye nezinhlobo ze-stem ezifihliwe. Lapho i-valve yesango lensimbi yensimbi eveziwe ivuliwe noma ivaliwe, isiqu siphumela ngaphandle kwesembozo se-valve, okuvumela ukubhekwa okuqondile kwedigri yokuvula. Ilungele izimo ezidinga ukuqapha ngesikhathi sangempela, njengokuphakelwa kwamanzi kamasipala kanye neziteshi zokudonsa amanzi. Isiqu se-handwheel ye-valve yesango esisithekile asidluleli ngale kwesembozo sevalvu. Inesakhiwo esihlangene futhi ilungele izikhathi zokuvala isikhala njengamapayipi angaphansi komhlaba ama- Wells nezitshalo zamakhemikhali ezinemishini eminyene. Ngokusho kwesakhiwo sepuleti lesango, kukhona uhlobo lwe-wedge kanye nohlobo oluhambisanayo. Ipuleti lesango le-wedge limise okwe-wedge, linophawu oluqinile, futhi lifanele izimo zokusebenza ezimaphakathi neziphezulu (PN1.6~16MPa). Phakathi kwazo, ipuleti lesango elinwebekayo lingavala igebe lokushisa futhi livame ukusetshenziswa kumapayipi okuthutha uwoyela ashisayo. Amapuleti esango ahambisanayo anezinhlangothi ezimbili ezihambisanayo futhi afakwe uphawu ngokucindezela kwe-medium. Asetshenziswa kakhulu ezimeni ezinengcindezi ephansi kanye nezinkulu ezinobubanzi obungu-DN300 noma ngaphezulu, njengamapayipi amakhulu okuhambisa amanzi. Zinokumelana okuphansi kokuvula nokuvala futhi zifanele ukusebenza okuvamile.

Ekusetshenzisweni, ngenxa yokuzinza okuvelele nokusebenza kokunqanyulwa kokuxhumeka kwe-flange, asetshenziswa kabanzi ezimbonini eziningi: uhlobo lwenduku efihliwe noma uhlobo lwepuleti lesango elihambisanayo luvame ukusetshenziswa kumasipala nokwakhiwa kwamanzi kanye nokukhipha amanzi, kanye namapayipi okuvikela umlilo. Embonini ye-petrochemical, ama-valve esango le-wedge stem avame ukusetshenziswa kumapayipi okuthutha kawoyela ongahluziwe kanye nemikhiqizo kawoyela ocolisisiwe ngaphansi kwezimo ezinomfutho ophezulu. Emkhakheni wamandla namandla, ama-valve esango le-wedge elinwebekayo anokumelana okungcono namazinga okushisa avame ukukhethwa ukuze asetshenziswe esiteshini samandla okupholisa amanzi kanye namapayipi esitimu esibhayela. Ama-valve esango ahambisana nokucindezela okuphansi anokumelana ngokuqinile nokungcola afaneleka emanzini angcolile ezimbonini kanye nezinhlelo zamanzi ezijikelezayo ku-metallurgy kanye nokwelashwa kwamanzi. Lapho ukhetha, ingcindezi, indawo kanye nezici ezimaphakathi kufanele kucatshangelwe. Ukusebenza kwayo okuthembekile kuyenza ibe yingxenye yokulawula ewumgogodla yezinhlelo zamapayipi ezimbonini ezihlukahlukene.

Ukukhethwa kohlobo lwama-valve esango ane-flanged kudinga ukucabangela ukucindezela, isikhala kanye nezici eziphakathi. Ukusebenza kwayo okuthembekile kokuvala kuyenza ibe yingxenye yokulawula eyinhloko ezinhlelweni zamapayipi ezimboni ezihlukahlukene. Uma unezidingo ezihlobene, sicela usithinte ngezansi. Njengomkhiqizi wamavalvu esango Lemboni oneminyaka engu-20 ubudala, i-Jinbin Valve ikunikeza izixazululo ezichwepheshile.(Ivaluvu Yesango Enamanani)