1. Engeza igrisi yokuvala

Kuma-valve angasebenzisi i-sealing grease, cabanga ngokufaka i-sealing grease ukuze uthuthukise ukusebenza kwe-valve stem sealing.

2. Engeza isigcwalisi

Ukuze kuthuthukiswe ukusebenza kokuvala kokupakisha esiqwini se-valve, indlela yokwengeza ukupakisha ingasetshenziswa. Ngokuvamile, kusetshenziswa ama-filler axubile anezingqimba ezimbili noma ezinezingqimba eziningi. Ukwandisa nje inani, njengokwandisa inani kusuka ezingcezu ezi-3 kuya ezingcezu ezi-5, ngeke kube nomphumela osobala.

3. Buyisela isigcwalisi se-graphite

Ukupakisha kwe-PTFE okusetshenziswe kabanzi kunokushisa okusebenzayo okuphakathi kuka--20 kuya ku-+200°C. Uma izinga lokushisa lishintsha kakhulu phakathi kwemikhawulo ephezulu nephansi, ukusebenza kwayo kokuvala kuzoncipha kakhulu, kuzoguga ngokushesha futhi isikhathi sayo sokuphila sizoba sifushane.

Ama-filler e-graphite aguquguqukayo anqoba la maphutha futhi anempilo ende yenkonzo. Ngakho-ke, amanye amafektri ashintshe konke ukupakisha kwe-PTFE kwaba ukupakisha kwe-graphite, futhi ngisho nama-valve okulawula asanda kuthengwa asetshenziswe ngemuva kokufaka esikhundleni se-PTFE packing nge-graphite packing. Kodwa-ke, i-hysteresis yokusebenzisa i-graphite filler inkulu, futhi ngezinye izikhathi ukukhasa kwenzeka ekuqaleni, ngakho-ke kufanele kucatshangelwe lokhu.

4. Shintsha indlela yokugeleza bese ubeka i-P2 ekugcineni kwesiqu sevalvu.

Uma i-△P inkulu futhi i-P1 inkulu, ukuvala i-P1 ngokusobala kunzima kakhulu kunokuvala i-P2. Ngakho-ke, indlela yokugeleza ingashintshwa kusuka ku-P1 ekugcineni kwesiqu se-valve kuya ku-P2 ekugcineni kwesiqu se-valve, okusebenza kangcono kuma-valve anomfutho ophezulu kanye nomehluko omkhulu wokucindezela. Isibonelo, ama-valve e-bellows ngokuvamile kufanele acabangele ukuvala i-P2.

5. Sebenzisa ukuvala i-lens gasket

Ukuze kufakwe izembozo ezingaphezulu nezingezansi, kufakwe isembozo sesihlalo se-valve kanye nemizimba ye-valve ephezulu nephansi. Uma kuyi-seal eyisicaba, ngaphansi kokushisa okuphezulu kanye nokucindezela okuphezulu, ukusebenza kokufaka akukuhle, okubangela ukuvuza. Ungasebenzisa i-lens gasket seal esikhundleni salokho, engafinyelela imiphumela eyanelisayo.

6. Buyisela i-gasket yokuvala

Kuze kube manje, ama-gasket amaningi okuvala asasebenzisa amabhodi e-asbestos. Emazingeni okushisa aphezulu, ukusebenza kokuvala kuphansi futhi isikhathi senkonzo sifushane, okubangela ukuvuza. Kulesi simo, ungasebenzisa ama-gasket e-spiral wound, ama-rings “O”, njll., asesetshenziswe yizimboni eziningi manje.

7. Qinisa amabhawodi ngokulinganayo bese uvala ngama-gasket amancane

Esimweni se-valve esilawulayo esine-“O” ring seal, lapho kusetshenziswa ama-gasket aminyene anokuguquguquka okukhulu (njengama-winding sheet), uma ukucindezela kungalingani futhi amandla engalingani, uphawu luzolimala kalula, luthambeke futhi lukhubazeke. Kuthinta kakhulu ukusebenza kokuvala.

Ngakho-ke, lapho kulungiswa futhi kuhlanganiswa lolu hlobo lwevalvu, amabhawodi okucindezela kumele aqiniswe ngokulinganayo (qaphela ukuthi awakwazi ukuqina ngesikhathi esisodwa). Kungaba ngcono uma i-gasket ejiyile ingashintshwa ibe yi-gasket encane, enganciphisa kalula ukuthambekela futhi iqinisekise ukuvalwa.

8. Khulisa ububanzi bomphezulu wokuvala

I-valve core eyisicaba (njenge-valve plug ye-valve enezindawo ezimbili kanye ne-sleeve valve) ayinawo umkhombandlela nomkhombandlela ogobile endaweni ye-valve. Lapho i-valve isebenza, i-valve core ingaphansi kwamandla aseceleni futhi igeleza isuka endaweni yokungena. Isikwele, lapho igebe elifanayo le-valve core likhulu, kulapho lesi simo se-sideline sizoba sibi kakhulu. Ngaphezu kwalokho, ukuguqulwa, ukungagxili, noma ukugoba okuncane kwendawo yokuvala i-valve core (ngokuvamile ukugoba okungu-30° ukuze kuqondiswe) kuzoholela ekugoba i-valve core lapho iseduze nokuvala. Ubuso bokuphela kwe-chamfered bubekwa endaweni yokuvala i-valve, okubangela ukuthi i-valve core igxume lapho ivala, noma ingavali nhlobo, okwandisa kakhulu ukuvuza kwe-valve.

Isixazululo esilula nesisebenza kahle kakhulu ukwandisa usayizi wobuso bokuvala i-valve core, ukuze ububanzi obuncane bobuso bokugcina be-valve core bube buncane ngo-1 kuya ku-5 mm kunobubanzi besihlalo se-valve, futhi bube nesiqondiso esanele sokuqinisekisa ukuthi i-valve core iqondiswa esihlalweni se-valve futhi igcina ukuxhumana okuhle kobuso bokuvala.