Ivalve yeplagi yivalve ejikelezayo ekwimo yokuvala okanye iplunger. Emva kokujikeleza iidigri ezingama-90, ukuvulwa kweshaneli kwiplagi yevalve kuyafana okanye ukwahlulwe ukusuka kwindawo yokuvula ijelo kumzimba wevalve ukugqiba ukuvula okanye ukuvala. Isetyenziswa ngokubanzi kwi-oilfield exmba, ukuthuthwa kunye nezixhobo zokucoca, kwaye iivalve ezinjalo nazo ziyafuneka kwizityalo zokuxuba i-asphalt.

Iplagi yevalve yeplagi yeplagi kwisityalo sokuxuba i-asphalt ingaba yi-cylindrical okanye i-conical. Kwiplagi yevalve ye-cylindrical, umjelo ngokuqhelekileyo unoxande; kwiplagi yevalve yeconical, umjelo ukwitrapezoidal. Ezi zimilo zenza ulwakhiwo lwevalve yeplagi lube lula kwaye lufaneleke kakhulu ukubhloka kunye nokudibanisa imidiya kunye nokuphazamiseka.
Ekubeni intshukumo phakathi kweendawo zokutywinwa kwe-valve yeplagi inefuthe lokukhuhla, kwaye xa ivulekile ngokupheleleyo, inokuphepha ngokupheleleyo ukudibanisa nomgangatho ohambayo, ngoko ingasetyenziselwa ngokubanzi kwimidiya kunye neengqungquthela ezimisiwe. Ukongeza, enye into ebalulekileyo yevalve yeplagi kukuba kulula ukuziqhelanisa nolwakhiwo lweetshaneli ezininzi, ukuze ivalve enye ikwazi ukufumana ezimbini, ezintathu, okanye ezine ezahlukeneyo zokuqukuqela iindlela, ezinokwenza lula ukusetwa kwenkqubo yemibhobho. , ukunciphisa inani leevalve kunye nezinye izixhobo zokudibanisa ezifunekayo kwisixhobo.
I-valve yeplagi yezityalo zokuxuba i-asphalt ifanelekile ukuba isebenze rhoqo ngenxa yokuvula nokuvala ngokukhawuleza kwaye kulula. Ikwanayo nezibonelelo zokuxhathisa ulwelo oluncinci, ulwakhiwo olulula, ubungakanani obuncinci ngokwentelekiso, ubunzima obulula, ukugcinwa lula, ukusebenza kakuhle kokutywina, akukho kungcangcazela, kunye nengxolo ephantsi.
Xa i-valve yeplagi isetyenziswe kwizityalo zokuxuba i-asphalt, ayiyi kunyanzeliswa ngumkhombandlela wesixhobo, kwaye ulwalathiso lokuhamba kwe-medium lunokuba nayiphi na, ekhuthaza ngakumbi ukusetyenziswa kwayo kwisixhobo. Ngapha koko, ukongeza kolu luhlu lukhankanywe ngasentla, i-valve yeplagi inokusetyenziswa ngokubanzi kwi-petrochemical, ikhemikhali, igesi yamalahle, igesi yendalo, igesi yepetroleum engamanzi, imisebenzi ye-HVAC kunye noshishino ngokubanzi.