I-valve yepulaki iyi-valve ejikelezayo esesimweni sokuvala noma i-plunger. Ngemva kokuzungezisa amadigri angu-90, ukuvuleka kwesiteshi kupulaki ye-valve kuyafana noma kuhlukaniswe nokuvulwa kwesiteshi emzimbeni wevalvu ukuze kuqedelwe ukuvula noma ukuvala. Isetshenziswa kabanzi ekumbiweni kwamafutha, ezokuthutha kanye nemishini yokucwenga, futhi ama-valve anjalo ayadingeka nasezitshalweni zokuxuba i-asphalt.

Ipulaki ye-valve ye-valve yepulaki esitshalweni sokuxuba i-asphalt ingaba yi-cylindrical noma i-conical. Kupulaki ye-valve eyi-cylindrical, isiteshi ngokuvamile singunxande; kupulaki ye-valve eyi-conical, isiteshi si-trapezoidal. Lezi zimo zenza ukwakheka kwe-valve yepulaki ibe lula futhi ifaneleke kakhulu ukuvimba nokuxhuma imidiya nokuphambukisa.
Njengoba ukunyakaza phakathi kwezindawo zokuvala ze-valve yepulaki kunomphumela wokukhuhla, futhi uma kuvuliwe ngokugcwele, kungagwema ngokuphelele ukuthintana nendawo ehambayo, ngakho-ke ingasetshenziselwa imidiya enezinhlayiya ezimisiwe. Ngaphezu kwalokho, esinye isici esibalulekile se-valve yepulaki ukuthi kulula ukuzivumelanisa nesakhiwo samashaneli amaningi, ukuze i-valve eyodwa ikwazi ukuthola amashaneli okugeleza amabili, amathathu, noma amane ahlukene, angenza kube lula ukumiswa kwesistimu yamapayipi. , nciphisa inani lama-valve nezinye izesekeli zokuxhuma ezidingekayo kumishini.
I-valve yepulaki yezitshalo zokuxuba i-asphalt ifaneleka ukusebenza njalo ngenxa yokuvula nokuvala kwayo okusheshayo nokulula. Iphinde ibe nezinzuzo zokumelana noketshezi oluncane, isakhiwo esilula, usayizi omncane uma kuqhathaniswa, isisindo esilula, ukugcinwa okulula, ukusebenza kahle kokuvala, akukho ukudlidliza, nomsindo ophansi.
Lapho i-valve yepulaki isetshenziswa ezitshalweni zokuxuba i-asphalt, ngeke ivinjelwe isiqondiso sedivayisi, futhi isiqondiso sokugeleza se-medium singaba yinoma yikuphi, okuqhubeka nokukhuthaza ukusetshenziswa kwayo kumishini. Eqinisweni, ngaphezu kohla olubalulwe ngenhla, i-valve yepulaki ingasetshenziswa kabanzi ku-petrochemical, amakhemikhali, igesi yamalahle, igesi yemvelo, igesi ye-petroleum ewuketshezi, imisebenzi ye-HVAC kanye nezimboni jikelele.