Ngawo-1930, i-ivalvu yebhabhathaneYasungulwa e-United States, kwathi ngawo-1950, yethulwa eJapane. Nakuba yayingasetshenziswa kakhulu eJapane kwaze kwaba ngawo-1960, ayizange yaziwe lapha kwaze kwaba ngawo-1970.

Izici ezibalulekile zevalvu yebhabhathane isisindo sayo esilula, indawo yokufaka encane, kanye ne-torque ephansi yokusebenza. Ivalvu yebhabhathane inesisindo esingaba ngu-2T, kanti ivalvu yesango inesisindo esingaba ngu-3.5T, kusetshenziswa i-DN1000 njengesibonelo. Ivalvu yebhabhathane inezinga eliqinile lokuqina nokuthembeka futhi kulula ukuyihlanganisa nezindlela ezahlukene zokushayela. Inkinga yevalvu yebhabhathane evalwe ngerabha ukuthi, uma isetshenziswa ngendlela engafanele njengevalvu yokubhoboza, kuzokwenzeka ukugoba, okubangela ukuthi isihlalo serabha siqhekeke futhi sonakale. Ngakho-ke, ukukhetha okufanele kuncike ezidingweni zezimo zokusebenza. Izinga lokugeleza lishintsha ngokunembile njengomsebenzi wokuvulwa kwevalvu yebhabhathane.

Uma isetshenziswa ukulawula ukugeleza, izici zokugeleza kwayo zihlobene kakhulu nokumelana nokugeleza kwephayiphi. Izinga lokugeleza kwamavalvu, isibonelo, lizohluka kakhulu uma amapayipi amabili efakwe ububanzi bevalvu obufanayo kanye nesimo, kodwa ama-coefficients okulahlekelwa yiphayiphi ahlukene. Ukudonsa umoya kungenzeka kwenzeke ngemuva kwepuleti levalvu ngenkathi ivalvu isesimweni esinzima sokugoba, okungalimaza ivalvu. ivame ukusetshenziswa ngaphandle ku-15°.

Iivalvu yebhabhathaneyakha isimo esihlukile uma iphakathi nendawo evulekile, lapho ingxenye engaphambili yepuleti lovemvane kanye nomzimba wevalvu kuphakathi nendawo kushafti yevalvu. Ingxenye engaphambili yepuleti lovemvane eyodwa iya ohlangothini olufanayo.

Ngenxa yalokho, uhlangothi olulodwa lomzimba we-valve kanyeivalvuIpuleti lihlangana ukuze lenze imbobo efana nomlomo, kanti olunye uhlangothi lufana ne-throttle. I-gasket yerabha ihlukanisiwe. I-torque yokusebenza kwe-valve ye-butterfly iyahlukahluka ngokuya ngokuma kwe-valve yokuvula nokuvala. Ngenxa yokujula kwamanzi, i-torque ekhiqizwa umehluko phakathi kwamakhanda amanzi aphezulu nangaphansi e-valve shaft ayinakunakwa kuma-valve e-butterfly avundlile, ikakhulukazi ama-valve amakhulu.

Ngaphezu kwalokho, kuzokwakheka ukugeleza kwe-bias futhi i-torque izophakama lapho kufakwa indololwane ohlangothini lokungena lwe-valve. Ngenxa yomphumela we-torque yokugeleza kwamanzi lapho i-valve iphakathi nokuvulwa, indlela yokusebenza kumele izikhiyele.