1.Engeza igrisi yokuvala

Kumavalvu angawasebenzisi amafutha okuvala, cabanga ukufaka igrisi yokuvala ukuze uthuthukise ukusebenza kokuvala isiqu se-valve.

2. Engeza isigcwalisi

Ukuze uthuthukise ukusebenza kokuvala ukupakisha esiqwini se-valve, indlela yokwengeza ukupakisha ingasetshenziswa.Imvamisa, kusetshenziswa izigcwalisi ezixubene ezinezingqimba ezimbili noma eziningi.Ukwandisa nje inani, njengokwandisa inombolo kusuka ezicucu ezi-3 kuye kwezingu-5, ngeke kube nomphumela osobala.

3. Faka esikhundleni se-graphite filler

I-PTFE yokupakisha esetshenziswa kabanzi inezinga lokushisa lokusebenza ebangeni lika -20 kuya +200°C.Lapho izinga lokushisa lishintsha kakhulu phakathi kwemikhawulo engaphezulu nephansi, ukusebenza kwayo kokuvala kuzokwehla kakhulu, izoguga ngokushesha futhi impilo yayo ibe mfushane.

Izigcwalisi ze-graphite eziguquguqukayo zinqoba lezi ziphutha futhi zibe nempilo ende yesevisi.Ngakho-ke, amanye amafektri ashintshe konke ukupakisha kwe-PTFE ekupakini kwe-graphite, futhi ngisho nama-valve okulawula asanda kuthengwa asetshenzisiwe ngemva kokufaka esikhundleni sokupakisha kwe-PTFE ngokupakisha kwe-graphite.Kodwa-ke, i-hysteresis yokusebenzisa i-graphite filler inkulu, futhi ngezinye izikhathi ukukhasa kwenzeka ekuqaleni, ngakho-ke kufanele kucatshangelwe lokhu.

4. Shintsha isiqondiso sokugeleza bese ubeka i-P2 ekugcineni kwesiqu se-valve.

Uma △P inkulu futhi i-P1 inkulu, ukuvala i-P1 ngokusobala kunzima kunokuvala i-P2.Ngakho-ke, isiqondiso sokugeleza singashintshwa kusuka ku-P1 ekugcineni kwe-valve stem kuya ku-P2 ekupheleni kwe-valve stem, esebenza kangcono kuma-valve anengcindezi ephezulu kanye nomehluko omkhulu wengcindezi.Isibonelo, ama-valve e-bellows ngokuvamile kufanele acabangele ukuvala i-P2.

5. Sebenzisa i-lens gasket sealing

Ukuze kuvalwe uphawu lwamakhava angaphezulu nangaphansi, ukuvalwa kwesihlalo se-valve kanye nemizimba yama-valve ephezulu naphansi.Uma kuwuphawu oluyisicaba, ngaphansi kwezinga lokushisa eliphezulu nokucindezela okukhulu, ukusebenza kokuvala akubi, okubangela ukuvuza.Ungasebenzisa i-lens gasket seal esikhundleni salokho, engafinyelela imiphumela egculisayo.

6. Faka esikhundleni i-gasket yokuvala

Kuze kube manje, ama-gasket amaningi okuvala uphawu asasebenzisa amabhodi e-asbestos.Emazingeni okushisa aphezulu, ukusebenza kokuvala kuba buthakathaka futhi impilo yesevisi ifushane, okubangela ukuvuza.Kulokhu, ungasebenzisa ama-spiral wound gaskets, ama-“O” rings, njll., amafekthri amaningi asewamukele manje.

7. Qinisa amabhawodi ngokulinganayo bese uwavala ngama-gaskets amancane

Esakhiweni se-valve esilawulayo esinophawu lwendandatho ethi "O", lapho kusetshenziswa ama-gaskets aminyene ane-deformation enkulu (njengamashidi asongayo), uma ukucindezelwa ku-asymmetrical futhi amandla e-asymmetrical, uphawu luzolimala kalula, lutsheke futhi lukhubazeke.Kuthinta kakhulu ukusebenza kokuvala.

Ngakho-ke, lapho ulungisa futhi uhlanganisa lolu hlobo lwe-valve, ama-bolts okucindezela kufanele aqiniswe ngokulinganayo (qaphela ukuthi awakwazi ukuqiniswa ngesikhathi esisodwa).Kungaba ngcono uma i-gasket ewugqinsi ingashintshwa ibe yi-gasket encane, enganciphisa kalula ukuthambekela nokuqinisekisa ukuvala.

8.Khulisa ububanzi bendawo yokuvala

I-valve core (njengepulaki ye-valve ye-valve enezindawo ezimbili kanye ne-sleeve valve) ayinawo umhlahlandlela nendawo egobile esihlalweni.Lapho i-valve isebenza, i-valve core ingaphansi kwamandla asemaceleni futhi igeleza isuka lapho kugeleza khona.Isikwele, lapho likhulu igebe elihambisanayo le-valve core, le nto izoba bucayi kakhulu.Ukwengeza, ukuguquguquka, ukungagxili, noma i-chamfering encane ye-valve core sealing surface (ngokuvamile i-30° chamfering ukuze iqondiswe) kuzoholela ekuvalweni kwe-valve core uma sekusondele ukuvala.Ubuso bokuphela kwe-chamfered bubekwe endaweni yokuvala yesihlalo se-valve, okubangela ukuthi umgogodla we-valve ugxume lapho uvala, noma ungavali nhlobo, okwandisa kakhulu ukuvuza kwe-valve.

Isixazululo esilula nesisebenza kahle kakhulu ukukhulisa usayizi wendawo yokuvala i-valve core, ukuze ububanzi obuncane be-valve core ekupheleni kobuso bube buncane ngo-1 kuya ku-5 mm kunobubanzi besihlalo se-valve, futhi ibe nesiqondiso esanele sokuqinisekisa ukuthi i-valve I-core iqondiswa esihlalweni se-valve futhi igcina ukuthintana kahle kwendawo yokuvala uphawu.