Ngawo-1930, i-uvemvane valveyadalwa e-United States, futhi ngawo-1950, yethulwa eJapane.Nakuba ingazange ijwayele ukusetshenziswa eJapane kwaze kwaba ngawo-1960, ayizange yaziwa kakhulu lapha kwaze kwaba ngawo-1970.

Izici eziyinhloko zevalve uvemvane isisindo salo esilula, ukugxilwa kwezinyawo ezihlangene, kanye netorque ephansi yokusebenza.I-valve uvemvane inesisindo esicishe sibe ngu-2T, kanti i-valve yesango inesisindo esingu-3.5T, isebenzisa i-DN1000 njengesibonelo.I-valve uvemvane inezinga eliqinile lokuqina nokuthembeka futhi kulula ukuhlanganisa nezindlela zokushayela ezihlukene.I-drawback ye-valve ye-butterfly evalwe nge-rubber yukuthi, uma isetshenziswe ngendlela engafanele njenge-valve ye-throttling, i-cavitation izokwenzeka, okubangela ukuthi isihlalo senjoloba sihlakaze futhi sonakaliswe.Ngakho-ke, ukukhetha okufanele, kuncike ezidingweni zezimo zokusebenza.Izinga lokugeleza lishintsha ngokuyisisekelo njengomsebenzi wokuvuleka kwevalve uvemvane.

Uma isetshenziselwa ukulawula ukugeleza, izici zayo zokugeleza zihlotshaniswa eduze nokumelana nokugeleza kwepayipi.Izinga lokugeleza kwama-valve, isibonelo, lizohluka kakhulu uma amapayipi amabili efakwe ububanzi obufanayo be-valve kanye nefomu, kodwa ama-coefficients ahlukene okulahlekelwa kwamapayipi.I-Cavitation kungenzeka yenzeke ngemuva kwe-valve plate ngenkathi i-valve isesimweni esindayo, esingalimaza i-valve.kuvame ukusetshenziswa ngaphandle ku-15°.

Iuvemvane valveyakha isimo esihlukile uma imaphakathi nokuvuleka kwayo, lapho isiphetho sangaphambili sepuleti levemvane kanye nomzimba wevalvu ugxile ku-valve shaft.Ingaphambili lepuleti lovemvane lihamba libheke ohlangothini olufanayo.

Ngenxa yalokho, umzimba we-valve ohlangothini olulodwa kanye ne-i-valveipuleti lihlanganisa ukwenza indawo yokuvula i-nozzle, kuyilapho olunye uhlangothi lufana ne-throttle.I-gasket yerabha ihlukanisiwe.I-torque yokusebenza yevalve uvemvane iyahlukahluka kuye ngokuvula nokuvala kwevalvu.Ngenxa yokujula kwamanzi, i-torque ekhiqizwa umehluko phakathi kwamakhanda amanzi aphezulu naphansi we-valve shaft ayikwazi ukunganakwa ngama-valve ovemvane avundlile, ikakhulukazi ama-valve anobubanzi obukhulu.

Ukwengeza, ukugeleza kokuchema kuzokwakheka futhi i-torque izokhuphuka lapho indololwane ifakwa ohlangothini lokungena lwe-valve.Ngenxa yomphumela we-torque yokugeleza kwamanzi lapho i-valve iphakathi nokuvula, indlela yokusebenza kufanele ibe i-self-locking.