Isitulo sevalve yebhabhathaneyinxalenye esuswayo ngaphakathi kwevalve, indima ephambili kukuxhasa ipleyiti yevalve ivuleke ngokupheleleyo okanye ivalwe ngokupheleleyo, kwaye yenze i-vice yokutywina. Ngokuqhelekileyo, i-diameter yesitulo ilingana ne-valve caliber. Imathiriyeli yesihlalo sevalve yebhabhathane ibanzi kakhulu, imathiriyeli esetyenziswa ngokuqhelekileyo kukutywina okuthambileyo kwe-EPDM, NBR, PTFE, kunye nentsimbi eqinileyo yokutywina imathiriyeli yecarbide. Okulandelayo siza kwazisa nganye nganye.
I-1.EPDM-Xa kuthelekiswa nezinye irabha yenjongo jikelele, irabha ye-EPDM ineenzuzo ezinkulu, ezibonakaliswa ikakhulu kwi:
A. Ixabiso elibi kakhulu, kwiibhanana ezisetyenziswa ngokuqhelekileyo, i-EPDM ye-rubber ye-rubber seal iyona nto ilula kakhulu, unokwenza ukugcwalisa okuninzi, ukunciphisa iindleko zerabha.
B. Izinto ze-EPDM zokuguga, ukumelana nelanga, ukumelana nobushushu, ukuxhathisa umphunga wamanzi, ukuxhathisa kwi-radiation, ilungele i-asidi ebuthakathaka kunye ne-alkali media, iipropati ezintle zokugquma.
C. Uluhlu lobushushu, elona lisezantsi linokuba -40 ° C - 60 ° C, linokuba yi-130 ° C iimeko zokushisa zokusetyenziswa kwexesha elide.
I-2.NBR-i-oil-resistant, i-heat resistant, i-resistant resistant, kwaye kwangaxeshanye inokumelana kakuhle namanzi, ukutywinwa komoya kunye neempawu ezigqwesileyo zokudibanisa. Ukusetyenziswa okungakumbi kumbhobho we-oyile, into engalunganga kukuba ayixhathisi kumaqondo obushushu aphantsi, ukuxhathisa kwe-ozone, iipropathi ezisezantsi zokugquma, ukuqina kwakhona kubanzi.
3. PTFE: iplastiki fluorine, lo mbandela unokumelana olomeleleyo acid kunye alkali, kang ezahlukeneyo izinyibilikisi organic ukusebenza, lo gama impahla ukumelana lobushushu eliphezulu, ingasetyenziswa ngokuqhubekayo kwi 260 ℃, ubushushu eliphezulu kakhulu inokufikelela 290-320 ℃, PTFE wabonakala, isonjululwe ngempumelelo kushishino lwemichiza, petroleum, ezinye iingxaki kwintsimi yamachiza kunye nezinye iingxaki zoshishino.
4. Isitywina esiqinileyo sentsimbi (i-carbide): isihlalo sentsimbi esiqinileyo sinokumelana kakuhle nobushushu obuphezulu kunye noxinzelelo oluphezulu, ukuxhathisa ukugqwala, ukunxitywa kweempawu zokumelana, kuhle kakhulu ukwenza iziphene zezinto zokutywina ezithambileyo azikwazi ukumelana nobushushu obuphezulu kunye noxinzelelo oluphezulu, kodwa izinto zokutywina eziqinileyo kwiimfuno zokusetyenzwa kwenkqubo ziphezulu kakhulu, ekuphela kwengxaki yokuvala i-valve enzima emva kwexesha elide lokutywinwa kuya kuba yi-valve yokuvala intsimbi. ukusebenza komsebenzi wokuvuza.