Ngeminyaka yoo-1930,ivalvu yebhabhathaneYadalwa eMelika, kwaye ngeminyaka yoo-1950, yaziswa eJapan. Nangona yayingasetyenziswa rhoqo eJapan de kwaba ngeminyaka yoo-1960, ayizange ifumaneke apha de kwaba ngeminyaka yoo-1970.

Iimpawu eziphambili zevalvu yebhabhathane bubunzima bayo obulula, indawo yokufaka encinci, kunye ne-torque ephantsi yokusebenza. Ivalvu yebhabhathane inobunzima obumalunga ne-2T, ngelixa ivalvu yesango inobunzima obumalunga ne-3.5T, kusetyenziswa i-DN1000 njengomzekelo. Ivalvu yebhabhathane inomgangatho oqinileyo wokuqina kunye nokuthembeka kwaye kulula ukuyidibanisa neendlela ezahlukeneyo zokuqhuba. Ingxaki yevalvu yebhabhathane etywinwe ngerabha kukuba, xa isetyenziswa ngendlela engafanelekanga njengevalvu yokuqhobosha, kuya kwenzeka ukuqhekeka, okubangela ukuba isihlalo serabha sixobuke kwaye sonakale. Ukhetho oluchanekileyo, ke ngoko, luxhomekeke kwiimfuno zeemeko zokusebenza. Izinga lokuhamba litshintsha ngokuthe ngqo njengomsebenzi wokuvulwa kwevalvu yebhabhathane.

Ukuba isetyenziselwa ukulawula ukuhamba kwamanzi, iimpawu zayo zokuhamba kwamanzi zihambelana kakhulu nokumelana nokuhamba kwamanzi kombhobho. Umzekelo, izinga lokuhamba kweevalvu liya kwahluka kakhulu ukuba imibhobho emibini ifakwe ububanzi bevalvu kunye nemo efanayo, kodwa ii-coefficients zokulahleka kwepayipi ezahlukeneyo. Ukukhupha amanzi emzimbeni kunokwenzeka ngasemva kwepleyiti yevalvu ngelixa ivalvu ikwindawo enzima yokuthontelana, enokuyonakalisa ivalvu. Idla ngokusetyenziswa ngaphandle kwi-15°.

Iivalvu yebhabhathaneYenza imeko eyahlukileyo xa iphakathi kwindawo evulekileyo, xa isiphelo sangaphambili seplate yebhabhathane kunye nomzimba wevalvu ziphakathi kwi-valve shaft. Isiphelo sangaphambili seplate yebhabhathane enye sihamba kwicala elifanayo.

Ngenxa yoko, icala elinye lomzimba wevalvu kunyeivalvuIpleyiti iyadibana ukuze yenze umngxuma ofana nomlomo, ngelixa elinye icala lifana ne-throttle. I-gasket yerabha ihlukanisiwe. I-torque yokusebenza kwe-butterfly valve iyahluka ngokwendlela yokuvula nokuvala kwe-valve. Ngenxa yobunzulu bamanzi, i-torque eveliswa ngumahluko phakathi kweentloko zamanzi eziphezulu nezisezantsi ze-valve shaft ayinakuthathelwa ingqalelo kwii-butterfly valves ezithe tye, ingakumbi ii-butterfly valves ezinkulu.

Ukongeza, kuya kubakho ukuhamba kwe-bias kwaye i-torque iya kunyuka xa kufakwa ingqiniba kwicala lokungena levalvu. Ngenxa yempembelelo ye-torque yokuhamba kwamanzi xa ivalvu iphakathi ekuvulekeni, indlela yokusebenza kufuneka izivale ngokwayo.