Ivalve yebhabhathane, eyaziwa ngokuba yi-valve ye-flap, i-valve elawulayo enesakhiwo esilula, esingasetyenziselwa ukulawula okuphakathi kwipayipi yoxinzelelo oluphantsi.Ivalve yebhabhathane ibhekisa kwivalve endawo yayo yokuvala (icwecwe levalve okanye ipleyiti yebhabhathane) iyidiski kwaye ijikeleza ivalufa ukuze ivuleke kwaye ivale.
Ivalve ingasetyenziselwa ukulawula ukuhamba kweentlobo ezahlukeneyo zolwelo olunjengomoya, amanzi, umphunga, imidiya eyahlukeneyo eyonakalisayo, udaka, iimveliso ze-oyile, isinyithi solwelo kunye nemidiya ye-radioactive.Isetyenziselwa ikakhulu ukusika kunye nokubetha kumbhobho.Inxalenye yokuvula kunye nokuvala i-valve ye-butterfly yi-disc-shaped butterfly plate, ejikeleza i-axis yayo kumzimba wevalve, ukuze kufezekiswe injongo yokuvula, ukuvala okanye ukulungiswa.
Ngeminyaka yee-1930, iUnited States yavelisa iivelufa butterfly, eyaziswa eJapan ngeminyaka yee-1950 kwaye ayizange isetyenziswe kakhulu eJapan de kwayi-1960.Yakhuthazwa eTshayina emva kweminyaka yoo-1970.
Iimpawu eziphambili zevalve yebhabhathane zezi: i-torque encinci yokusebenza, indawo encinci yokufaka kunye nobunzima obulula.Ukuthatha i-DN1000 njengomzekelo, i-valve ye-butterfly malunga neetoni ezi-2, ngelixa i-valve yesango malunga neetoni ezi-3.5, kwaye i-valve butterfly ilula ukudibanisa kunye nezixhobo ezahlukeneyo zokuqhuba, ngokuhlala kakuhle kunye nokuthembeka.Ukungalungi kweIvalve yebhabhathane yerabha etywiniweyokukuba xa isetyenziselwa i-throttling, i-cavitation iya kwenzeka ngenxa yokusetyenziswa okungafanelekanga, okubangelwa ukukhupha kunye nokulimala kwesihlalo se-rubber.Ngoko ke, indlela yokuyikhetha ngokuchanekileyo kufuneka isekelwe kwiimfuno zeemeko zokusebenza.
Ubudlelwane phakathi kokuvulwa kwevalve yebhabhathane kunye nokuhamba ngokusisiseko kuyatshintsha kubungakanani bomgca.Ukuba isetyenziselwa ukulawula ukuhamba, iimpawu zayo zokuhamba nazo zihambelana ngokusondeleyo nokumelana nokuhamba kombhobho.Ngokomzekelo, i-diameter kunye nefom ye-valve efakwe kwimibhobho emibini iyafana, kwaye ukuhamba kwee-valve kuya kuhluke kakhulu ukuba i-coefficient yokulahlekelwa kwepayipi iyahluka.Ukuba i-valve ikwimeko yoluhlu olukhulu lwe-throttling, i-cavitation kulula ukwenzeka ngasemva kweplate yevalve, enokonakalisa i-valve.Ngokuqhelekileyo, isetyenziswe ngaphandle kwe-15 °.Xa iivelufa butterflyikwindawo ephakathi yokuvula, imilo yokuvula eyenziwe ngumzimba wevalvu kunye nesiphelo sangaphambili sepleyiti yebhabhathane igxile kwi-valve shaft, kwaye imimandla eyahlukeneyo yenziwa macala omabini.Umphambili wepleyiti yebhabhathane kwelinye icala uhamba kwicala lokuhamba kwaye elinye icala lihamba ngokuchasene necala lokuhamba.Ke ngoko, umzimba wevalvu kunye nepleyiti yevalvu kwelinye icala yenza umbhobho njengokuvula, kwaye elinye icala lifana nomngxuma wokuvula.Umyinge wokuhamba kwicala lombhobho ukhawuleza kakhulu kunelo kwicala le-throttle, Uxinzelelo olungalunganga luya kwenziwa phantsi kwevalve yecala le-throttle, kwaye isitywina serabha siya kuwa rhoqo.
I-torque yokusebenza yevalve yebhabhathane inamaxabiso ahlukeneyo ngenxa yokuvula nokuvala ivalvu eyahlukileyo.I-torque eveliswa yivalve yebhabhathane ethe tyaba, ingakumbi ivalve yobubanzi obukhulu, ngenxa yobunzulu bamanzi kunye nomahluko phakathi kweentloko eziphezulu nezisezantsi zevalufa yevalufa ayinakungahoywa.Ukongezelela, xa i-elbow ifakwe kwicala lokungena kwi-valve, ukuhamba kwe-bias kwenziwa, kwaye i-torque iya kwanda.Xa ivalve ikwindawo ephakathi yokuvula, indlela yokusebenza ifuna ukuzitshixa ngenxa yesenzo sokuhamba kwamanzi mzuzu oguquguqukayo.
Ishishini leValve lidlala indima ebaluleke kakhulu kuphuhliso loqoqosho lwehlabathi njengekhonkco elibalulekileyo loshishino lokuvelisa izixhobo.Maninzi amakhonkco oshishino lwevalvu eTshayina.Ngokubanzi, i-China ingene kuluhlu lwamazwe awona mazwe makhulu emhlabeni.