Impahla yepheya evalayo, ikhwalithi yepheya yokuvala, ingcindezi ethile yophawu, kanye nezici ezibonakalayo ze-medium ngezinye zezinto ezimbalwa kwezinye ezingase zibe nomthelela ekutheni i-cryogenicama-valve ebholauphawu.Ukusebenza kwe-valve kuzothinteka kakhulu yilokhu okuguquguqukayo.Ithonya.Ukuqinisekisa ukusebenza okujwayelekile kwe-valve, kufanele yakhelwe kucatshangelwa umthelela walezi zici ngangokunokwenzeka.

Izinto zokuvala

Amandla okusebenza okuvala okuhlanekezelwa emazingeni okushisa aphansi adinga ukucatshangelwa.Insimbi izoshwabana futhi iwohloke njengoba izinga lokushisa lehla, lidale igebe esigxivini kanye nokwehla kwengcindezi ethile yophawu, okuzothinta ukusebenza kokuvala.Ngakho-ke, kubalulekile ukukhetha into efanelekile yokuvala ngenkathi uthuthukisa isakhiwo sokuvala ukuze uvikele ukuvala.Ukuze kuncishiswe ukungqubuzana lapho i-valve ivulwa futhi ivaliwe futhi inwebe ukuphila kwe-valve, kanye nokunciphisa izindleko nokuthuthukisa ukusebenza kokuvala uphawu, indlela ethambile yokubeka uphawu, ehlanganisa izinto zensimbi nezingezona ezensimbi, ngokuvamile isetshenziswa ku-LNG. izimo zokusebenza.Njengoba i-polytetrafluoroethylene izokhiqiza ukugeleza okubandayo emazingeni okushisa aphansi, ayifanele ukusetshenziswa, kuyilapho i-polytrifluorochlorethylene inokusebenza okuqinile kokuvala kungakhathaliseki ukuthi hlobo luni loketshezi olusebenzayo eqashwe kulo.

Ikhwalithi yesibili yokubeka uphawu

Ikhwalithi yokucubungula indawo eyindilinga kanye nobuhwaqane bobuso obuvalayo yizinkomba eziyinhloko zekhwalithi yokuvala.I-torque edingekayo ukuze uvule futhi uvale i-valve ingancishiswa, impilo yesevisi ye-valve inganwetshwa, futhi ukusebenza kokuvala kwe-valve kungathuthukiswa ngokwenza i-sphere ibe yindilinga futhi ishelele ngaphandle kwendawo yayo.Ngakho-ke, kubalulekile ukuthuthukisa ikhwalithi yokucutshungulwa kwangaphezulu kokupheya kokuvala ngesikhathi sokuklama.

Ukucindezela okuqondile

Ingcindezi esetshenziswa endaweni yokuvala ngeyintshi yesikwele ngayinye yaziwa ngokuthi ingcindezi ethile yokuvala.Ukusebenza kahle kokuvala, ukwethembeka, nempilo ye-valve yebhola konke kuthintwa usayizi wengcindezi ethile yokuvala.Kodwa-ke, ukucindezela okuqondile kwebhola le-valve akuphakeme ngendlela engase ibe ngayo.Kwezinye izimo, ukucindezela okukhethekile okukhethekile kuyasiza ekuvaleni, kodwa njengoba ingcindezi ethile yokuvala ikhuphuka, i-torque edingekayo ukuze kusetshenziswe i-valve nayo izokhuphuka, engafanele ukuvala.I-valve isebenza ngokujwayelekile.Ngakho-ke, enye ingxenye ebalulekile yomklamo wokuvala izinga lokushisa eliphansi kakhuluama-valve ebholakuwukukhetha kokuvala ingcindezi ethile.

izakhiwo ezibonakalayo ze-medium

Uphawu luzothinteka ngezinga elithile yizici ezibonakalayo ze-medium, njenge-viscosity yayo kanye nezinga lokushisa.Okokuqala, ukungena kwe-medium kuncipha ngokukhula kwe-viscosity, okwenza kube nzima ukuvuza.Izimo zokushisa eziphansi yilapho izinga lokushisa le-medium linomthelela omkhulu ku-seal.Ukuvuza kubangelwa ukuguqulwa kwesakhiwo sokuvala okulethwa ukushintsha kosayizi kwezinye izingxenye zokuvala.Isigxivizo sizobhujiswa ngesikhathi esifanayo lapho ukucindezela kokuvala indawo kushintsha.Ngenxa yalokho, umphumela wokushisa kufanele ucatshangelwe lapho kwakhiwa isakhiwo sokubeka uphawu.