I-valve yangaphandle enciphisa i-valve yebhola yethusi iwuhlobo lwevalvu evamile esetshenziswa kakhulu kuvalvu.
Ukwenza intambo yangaphandle enciphisa i-valve yebhola yethusi izinze ekusebenzeni futhi ende empilweni yesevisi, izici ezilandelayo kufanele zinakwe:
1. Ngaphambi kokusetshenziswa, sebenzisa amanzi ukuhlanza ipayipi kanye nengxenye yomzimba we-valve echichimayo ukuze uvimbele izinsalela zensimbi nezinye izinsalela ukuthi zingangeni emgodini womzimba we-valve.
2. Uma i-valve yangaphandle yokunciphisa i-valve yebhola yethusi ivaliwe, kusekhona enye indawo esele emzimbeni we-valve, futhi ithwala ingcindezi ethile.Ngaphambi kokulungisa i-valve yebhola, vala i-valve yokuvala phambi kwe-valve yebhola, vula i-valve yebhola edinga ukulungiswa, futhi ukhulule ngokuphelele ukucindezela kwangaphakathi komzimba we-valve.
3. Ngokuvamile, i-PTFE isetshenziswa njengento yokuvala yamavalvu ebhola avalwe ngokuthambile, futhi indawo yokuvala yamavalvu ebhola avalwe kanzima yenziwe ngokuvela kwensimbi.Uma i-valve yebhola yepayipi idinga ukuhlanzwa, kuyadingeka ukuqaphela ukuvimbela ukulimala kwendandatho yokuvala nokuvuza ngesikhathi sokuqaqa.
4. Lapho uhlakaza futhi uhlanganisa i-valve yebhola ye-flanged, ama-bolts namantongomane ku-flange kufanele alungiswe kuqala, khona-ke wonke amantongomane kufanele aqiniswe kancane, futhi ekugcineni aqiniswe ngokuqinile.Uma i-nati ngayinye ilungiswa ngenkani kuqala, bese kuthi amanye amantongomane alungiswe, indawo ye-gasket izolimala noma iqhume ngenxa yomugqa ofanayo phakathi kwezindawo ze-flange, okuholela ekuvuzeni kwe-medium kusuka ku-valve flange.
