1. Yongeza igrisi yokutywina

Kwiivalvu ezingasebenzisi igrisi yokutywina, cinga ngokongeza igrisi yokutywina ukuphucula ukusebenza kokutywina kwesiqu sevalvu.

2. Yongeza isizalisi

Ukuze kuphuculwe ukusebenza kokutywina kokupakisha kwisiqu sevalvu, indlela yokongeza ukupakisha ingasetyenziswa. Ngokwesiqhelo, kusetyenziswa izizalisi ezixutyiweyo ezinamalayelo amabini okanye ezinamalayelo amaninzi. Ukwandisa nje inani, njengokunyusa inani ukusuka kwiziqwenga ezi-3 ukuya kwiziqwenga ezi-5, akuyi kuba nefuthe elibonakalayo.

3. Buyisela i-graphite filler

Iphakheji ye-PTFE esetyenziswa kakhulu inobushushu obusebenzayo obuphakathi kwe--20 ukuya kwi-+200°C. Xa ubushushu butshintsha kakhulu phakathi kwemida ephezulu nesezantsi, ukusebenza kwayo kokutywina kuya kuncipha kakhulu, iya kuguga ngokukhawuleza kwaye ubomi bayo buya kuba bufutshane.

Izizalisi zegrafiti eziguquguqukayo ziyazoyisa ezi ntsilelo kwaye zinobomi obude benkonzo. Ngenxa yoko, ezinye iifektri zitshintshe yonke ipakeji yePTFE ukuya kwipakeji yegrafiti, kwaye neevalvu zolawulo ezisandula ukuthengwa zisetyenzisiwe emva kokutshintsha ipakeji yePTFE ngepakeji yegrafiti. Nangona kunjalo, i-hysteresis yokusebenzisa i-graphite filler inkulu, kwaye ngamanye amaxesha ukukhasa kwenzeka ekuqaleni, ngoko ke kufuneka kuqwalaselwe oku.

4. Tshintsha indlela yokuhamba kwamanzi uze ubeke i-P2 kwisiphelo sesiqu sevalvu.

Xa i-△P inkulu kwaye i-P1 inkulu, ukutywina i-P1 ngokucacileyo kunzima ngakumbi kunokutywina i-P2. Ke ngoko, indlela yokuhamba kwayo ingatshintshwa ukusuka kwi-P1 kwisiphelo sesiqu sevalvu ukuya kwi-P2 kwisiphelo sesiqu sevalvu, nto leyo esebenza ngakumbi kwiivalvu ezinoxinzelelo oluphezulu kunye nomahluko omkhulu woxinzelelo. Umzekelo, iivalvu ze-bellows zihlala zicinga ngokutywina i-P2.

5. Sebenzisa isitywino se-lens gasket

Ukuvala izigqubuthelo eziphezulu nezisezantsi, ukuvala isihlalo sevalvu kunye nemizimba yevalvu ephezulu nesezantsi. Ukuba sisitywino esithe tyaba, phantsi kobushushu obuphezulu kunye noxinzelelo oluphezulu, ukusebenza kwesitywino akulunganga, okubangela ukuvuza. Ungasebenzisa isitywino segasket yelensi endaweni yoko, esinokufikelela kwiziphumo ezanelisayo.

6. Buyisela i-gasket yokutywina

Okwangoku, uninzi lwee-gaskets zokutywina zisasebenzisa iibhodi ze-asbestos. Kumaqondo obushushu aphezulu, ukusebenza kokutywina kuphantsi kwaye ubomi benkonzo bufutshane, nto leyo ebangela ukuvuza. Kule meko, ungasebenzisa ii-gaskets ze-spiral wound, ii-"O" rings, njl.njl., ezisetyenziswe ziifektri ezininzi ngoku.

7. Qinisa iibholithi ngokulinganayo uze uzivale ngee-gaskets ezincinci

Kwisakhiwo sevalvu esilawulayo esine-"O" ring seal, xa kusetyenziswa ii-gaskets ezixineneyo ezine-deformation enkulu (ezifana nee-winding sheets), ukuba ucinezelo alulingani kwaye amandla akalingani, i-seal iya konakala ngokulula, ithambeke kwaye iguquguquke. Ichaphazela kakhulu ukusebenza kwe-seal.

Ngoko ke, xa kulungiswa kwaye kuhlanganiswa olu hlobo lwevalvu, iibholiti zokucinezela kufuneka ziqiniswe ngokulinganayo (qaphela ukuba azinakuqinisekiswa ngaxeshanye). Kungangcono ukuba i-gasket etyebileyo ingatshintshwa ibe yi-gasket encinci, enokunciphisa lula ukuthambekela kwaye iqinisekise ukutywinwa.

8. Yandisa ububanzi bomphezulu wokutywina

I-flat valve core (njenge-valve plug ye-valve eneendawo ezimbini kunye ne-sleeve valve) ayinayo i-guide and guide wallpaper egobileyo kwi-valve seat. Xa i-valve isebenza, i-valve core iphantsi kwamandla asecaleni kwaye iphuma kwicala lokungena. Isikwere, okukhona i-valve core ilingana kakhulu, kokukhona le meko i-sideale iya kuba nzima ngakumbi. Ukongeza, i-deformation, i-non-concentricity, okanye i-chamfering encinci yomphezulu we-valve core sealing (ngokubanzi i-30° chamfering njengesikhokelo) iya kubangela i-valve core sealing xa isondele ekuvaleni. Ubuso be-chamfered end bubekwa kumphezulu we-valve seal, nto leyo ebangela ukuba i-valve core itsibe xa ivala, okanye ingavali kwaphela, nto leyo enyusa kakhulu ukuvuza kwe-valve.

Isisombululo esilula nesisebenzayo kukwandisa ubungakanani bomphezulu wokutywina we-valve core, ukuze ububanzi obuncinci bobuso be-valve core bube mncinci nge-1 ukuya kwi-5 mm kunobubanzi besihlalo se-valve, kwaye bube nesikhokelo esaneleyo sokuqinisekisa ukuba i-valve core ikhokelwa kwisihlalo se-valve kwaye igcina unxibelelwano oluhle lomphezulu wokutywina.