A uvemvane valveiwuhlobo lwevalvu engavulwa noma ivalwe ngokujikela emuva naphambili cishe ngamadigri angama-90. Iuvemvane valveisebenza kahle ngokomthetho wokugeleza ngaphezu kokuba namandla okuhle okuvala nokuvala, ukuklama okulula, usayizi omncane, isisindo esincane, ukusetshenziswa kwezinto eziphansi, ukufakwa okulula, i-torque yokushayela ephansi, nokusebenza okusheshayo. enye yezinhlobo zama-valve ezisheshayo.Ama-valve ovemvane asetshenziswa kaningi. Izinhlobonhlobo nobubanzi bokusetshenziswa kwazo ziyakhula, futhi ziya ngokuya zisetshenziselwa izinga lokushisa eliphezulu, ukucindezela okuphezulu, ububanzi obukhulu, ukubekwa uphawu okuphezulu, impilo ende, izici zokulungisa ezingavamile, nama-valve anemisebenzi eminingi. Manje inezinga eliphezulu lokwethembeka nezinye izici zokusebenza.

Ukusebenza kwamavalvu ovemvane kube ngcono ngenxa yokusetshenziswa kwerabha yokwenziwa engazweli ngamakhemikhali. Njengoba irabha yokwenziwa inezimfanelo zokumelana nokugqwala, ukumelana nokuguguleka, ubukhulu obuzinzile, ukuqina okuhle, ukubunjwa kalula, nezindleko eziphansi, irabha yokwenziwa enezakhiwo ezihlukahlukene ingakhethwa ngokuhambisana nezidingo ezihlukahlukene zohlelo lokusebenza ukuze kwanelise izimo zokusebenza zama-valve ovemvane.

Njengoba i-polytetrafluoroethylene (PTFE) inokumelana okuqinile nokugqwala, ukusebenza okuzinzile, ukumelana nokuguga, i-coefficient ephansi yokungqubuzana, ukubunjwa kalula, nokuzinza kobukhulu, ukusebenza kwayo jikelele kungathuthukiswa ngokugcwalisa nokwengeza izinto ezifanele ukuze kuzuzwe amandla angcono futhi ukungqubuzana. Irabha yokwenziwa inezihibe ezithile, kodwa izinto zokuvala izivalo zovemvane ezine-coefficient ephansi ziyazizungezile. Ukuze kuthuthukiswe ukusebenza kwama-valve e-butterfly, izinto eziphezulu ze-polymer yamangqamuzana, njenge-polytetrafluoroethylene, kanye nezinto zabo eziguquliwe zokugcwalisa zisetshenziswe kabanzi. Manje isithuthukisiwe, futhi i-valve yovemvane iye yakhiqizwa enezinga lokushisa elikhudlwana nokucindezela, ukusebenza okuthembekile kokuvala, nempilo ende ewusizo.

Amavalvu ovemvane avalelwe ngensimbi athuthuke kakhulu ukuze afeze izimfuno zezinhlelo zokusebenza zezimboni ezifana nezinga lokushisa eliphezulu neliphansi, ukuguguleka okunamandla, nokuphila okwandisiwe. Ama-valve ovemvane afakwe uphawu lwensimbi asetshenziswe kakhulu emikhakheni yezimboni njengamazinga okushisa aphezulu naphansi, ukuguguleka okuqinile, nokuphila isikhathi eside ngenxa yokusetshenziswa kokumelana nokushisa okuphezulu, ukumelana nokushisa okuphansi, ukumelana nokugqwala okuqinile, ukumelana nokuguguleka okuqinile, namandla aphezulu. izinto ze-alloy. Ukuze kuthuthukiswe ubuchwepheshe be-valve ye-butterfly, ububanzi obukhulu (9-750mm), umfutho ophezulu (42.0MPa), kanye nezinga lokushisa elibanzi (-196-606°C) amavavu ovemvane aqale avele.

I-valve yevemvane inokumelana nokugeleza okuncane lapho ivulwa ngokugcwele. Amavalvu ovemvane asetshenziswa kaningi emkhakheni wokulawulwa kobubanzi obukhulu ngoba ayakwazi ukulawula ukugeleza okuntekenteke ezindaweni ezivuleka phakathi kuka-15° no-70°.

Iningi lamavalvu ovemvane lingasetshenziswa nemidiya equkethe izinhlayiya eziqinile ezimisiwe njengoba ipuleti lovemvane lihamba ngokusula. Ingase futhi isetshenziselwe imidiya ye-granular kanye nempushana, kuye ngamandla ophawu.

Ama-valve ovemvane awusizo ekulawuleni ukugeleza. Lapho ukhetha i-valve uvemvane, kubalulekile ukucabangela ngokugcwele umthelela wokulahlekelwa kwengcindezi ohlelweni lwephayiphi kanye namandla epuleti uvemvane ukuze limelane nokucindezela kwepayipi lephayiphi lapho livaliwe ngenxa yokulahlekelwa umfutho wovemvane. i-valve epayipini inkulu, cishe iphindwe kathathu kune-valve yesango. Izinga lokushisa elisebenzayo lempahla yesihlalo esinwebekayo emazingeni okushisa aphezulu kufanele futhi licatshangelwe.

I-valve yevemvane inesakhiwo esifushane kanye nobude obuphansi obuphelele. Ivula futhi ivaleke ngokushesha futhi inezici ezinhle zokulawula uketshezi. Ukwenza ama-valve anobubanzi obukhulu kufanelana kangcono nesakhiwo se-valve uvemvane. Isinyathelo esibaluleke kakhulu ekukhetheni i-valve uvemvane ezosebenza kahle nangempumelelo uma isetshenziselwa ukulawula ukugeleza ukukhetha uhlobo olufanele kanye nokucaciswa kwayo.

Amavalvu ovemvane ngokuvamile ayelulekwa ukuthi asetshenziswe ekushayeni, ukulawula okulawulayo, kanye nemidiya yodaka lapho ubude besakhiwo obufushane, ukuvuleka okusheshayo nokuvala isivinini, kanye nokunqanyulwa kwengcindezi ephansi (umehluko omncane wengcindezi). Ama-valve e-butterfly angasetshenziswa nemidiya ehlukumezayo, iziteshi ezinobubanzi obuncishisiwe, umsindo ophansi, i-cavitation kanye ne-vaporization, inani elincane lokuvuza komkhathi, nokulungiswa kwezindawo ezimbili. Ukulungiswa kwe-throttle lapho usebenza ngaphansi kwezimo ezingajwayelekile, njengalapho uvala ngokuqinile, ukuguga ngokweqile, amazinga okushisa aphansi kakhulu, nokunye.