Cov qhov chaw uas tshem tau hauv lub valve yog siv los txhawb txoj haujlwm kaw tag nrho ntawm lub valve tub ntxhais thiab tsim ib khub sib khi. Feem ntau, lub rooj zaum txoj kab uas hla yog qhov siab tshaj plaws khiav txoj kab uas hla ntawm lub valve. Piv txwv li, cov khoom siv lub rooj zaum ntawm npauj npaim valve yog dav heev, txhua yam khoom siv roj hmab, yas thiab hlau tuaj yeem siv los ua cov khoom siv zaum, xws li: EPDM, NBR, NR, PTFE, PEEK, PFA, SS315, STELLITE thiab lwm yam. . Siv cov khoom siv elastic sealing thiab me me actuator thrust kom tau cua npuas nruj foob, compress lub valve lub rooj sealing kev ntxhov siab kom elastically deform cov ntaub ntawv thiab nyem rau hauv qhov ntxhib nto ntawm qhov sib txuam hlau los thaiv txhua txoj hauv kev. Lub permeability ntawm cov khoom yog lub hauv paus rau me me to ntawm cov kua. Cov ntaub ntawv uas yog mos heev, los yog nthuav tawm qhov txias deformation (creep) nyob rau hauv kev thauj khoom, tuaj yeem ua kom nruj los ntawm kev ntxiv cov fillers xws li fiberglass. Yog tias nws yog siv los ua cov ntawv nyias, nws tseem tuaj yeem ua tau raws li qhov yuav tsum tau siv, thiab tuaj yeem tshem tawm qhov txias deformation lossis deformation mus tas li. Lub foob yuav tsum tau ua tib zoo xyuas kom tsis txhob muaj qhov sib tsoo thiab cov pa tawm vim qhov sib txawv ntawm qhov sib txawv. Kev sib khi cov rooj zaum rau cov hlau yog ib qho kev daws teeb meem, tab sis tsis yog kev daws teeb meem, vim tias daim ntawv cog lus tuaj yeem tawg thiab ua tsis tau thaum raug thermal shock. Ib tug loj txaus siab poob yuav rhuav tshem cov khoom sib txuas.
Ethylene-propylene roj hmab muaj dej vapor kuj zoo heev thiab kwv yees tias yuav zoo dua li nws cov cua sov. Lub siab kub resistant EPDM lub rooj zaum tsis muaj qhov hloov pauv hauv qhov tsos tom qab ze li 100h hauv chav superheated ntawm 230 degree . EPDM valve lub rooj zaum thiab fluorine roj hmab, silicone roj hmab, fluorosilicone roj hmab, butyl roj hmab, nitrile roj hmab, thiab cov roj hmab ntuj nyob rau hauv tib lub sijhawm, cov tsos ntawm lub valve yuav ua rau tsis zoo tom qab lub sijhawm luv luv. Ethylene-propylene roj hmab kuj muaj kev tiv thaiv zoo rau cov dej superheated, tab sis nws muaj feem xyuam nrog txhua lub tshuab vulcanization. Cov roj hmab ethylene-propylene nrog dimorpholine disulfide thiab TMTD raws li cov vulcanization system muaj kev hloov me ntsis ntawm cov khoom siv tom qab tau soaked hauv dej superheated ntawm 125 degree rau 15 lub hlis, thiab qhov ntim nthuav dav tsuas yog 0.3 feem pua. Ethylene-propylene roj hmab muaj cov khoom siv hluav taws xob zoo heev thiab tiv thaiv corona, thiab nws cov khoom siv hluav taws xob zoo dua los yog ze rau styrene-butadiene roj hmab, chlorosulfonated polyethylene, polyethylene thiab cross-linked polyethylene. Txij li thaum tsis muaj polar substituents nyob rau hauv cov qauv molecular ntawm ethylene-propylene roj hmab, lub zog molecular cohesion yog tsawg, thiab cov saw molecular muaj peev xwm tswj tau yooj yim nyob rau hauv ntau yam, thib ob tsuas yog cov roj hmab ntuj thiab butadiene roj hmab, thiab tseem tuaj yeem tswj tau ntawm qhov kub thiab txias. Vim tias tsis muaj cov pab pawg nquag hauv cov qauv molecular ntawm ethylene-propylene roj hmab, lub zog cohesive yog tsawg, thiab cov roj hmab sib xyaw yog yooj yim tawg, thiab nws tus kheej adhesion thiab kev sib nrig sib adhesion tsis zoo heev. Cov qhov chaw uas tshem tau hauv lub valve yog siv los txhawb txoj haujlwm kaw tag nrho ntawm lub valve tub ntxhais thiab tsim ib khub sib khi. Feem ntau, lub rooj zaum txoj kab uas hla yog qhov siab tshaj plaws khiav txoj kab uas hla ntawm lub valve. Piv txwv li, cov khoom siv lub rooj zaum ntawm npauj npaim valve yog dav heev, txhua yam khoom siv roj hmab, yas thiab hlau tuaj yeem siv los ua cov khoom siv zaum, xws li: EPDM, NBR, NR, PTFE, PEEK, PFA, SS315, STELLITE thiab lwm yam. . Siv cov khoom siv elastic sealing thiab me me actuator thrust kom tau cua npuas nruj foob, compress lub valve lub rooj sealing kev ntxhov siab kom elastically deform cov ntaub ntawv thiab nyem rau hauv qhov ntxhib nto ntawm qhov sib txuam hlau los thaiv txhua txoj hauv kev. Lub permeability ntawm cov khoom yog lub hauv paus rau me me to ntawm cov kua. Cov ntaub ntawv uas yog mos heev, los yog nthuav tawm qhov txias deformation (creep) nyob rau hauv kev thauj khoom, tuaj yeem ua kom nruj los ntawm kev ntxiv cov fillers xws li fiberglass. Yog tias nws yog siv los ua cov ntawv nyias, nws tseem tuaj yeem ua tau raws li qhov yuav tsum tau siv, thiab tuaj yeem tshem tawm qhov txias deformation lossis deformation mus tas li. Lub foob yuav tsum tau ua tib zoo xyuas kom tsis txhob muaj qhov sib tsoo thiab cov pa tawm vim qhov sib txawv ntawm qhov sib txawv. Kev sib khi cov rooj zaum rau cov hlau yog ib qho kev daws teeb meem, tab sis tsis yog kev daws teeb meem, vim tias daim ntawv cog lus tuaj yeem tawg thiab ua tsis tau thaum raug thermal shock. Ib tug loj txaus siab poob yuav rhuav tshem cov khoom sib txuas.
Ethylene-propylene roj hmab muaj dej vapor kuj zoo heev thiab kwv yees tias yuav zoo dua li nws cov cua sov. Lub siab kub resistant EPDM lub rooj zaum tsis muaj qhov hloov pauv hauv qhov tsos tom qab ze li 100h hauv chav superheated ntawm 230 degree . EPDM valve lub rooj zaum thiab fluorine roj hmab, silicone roj hmab, fluorosilicone roj hmab, butyl roj hmab, nitrile roj hmab, thiab cov roj hmab ntuj nyob rau hauv tib lub sijhawm, cov tsos ntawm lub valve yuav ua rau tsis zoo tom qab lub sijhawm luv luv. Ethylene-propylene roj hmab kuj muaj kev tiv thaiv zoo rau cov dej superheated, tab sis nws muaj feem xyuam nrog txhua lub tshuab vulcanization. Cov roj hmab ethylene-propylene nrog dimorpholine disulfide thiab TMTD raws li cov vulcanization system muaj kev hloov me ntsis ntawm cov khoom siv tom qab tau soaked hauv dej superheated ntawm 125 degree rau 15 lub hlis, thiab qhov ntim nthuav dav tsuas yog 0.3 feem pua. Ethylene-propylene roj hmab muaj cov khoom siv hluav taws xob zoo heev thiab tiv thaiv corona, thiab nws cov khoom siv hluav taws xob zoo dua los yog ze rau styrene-butadiene roj hmab, chlorosulfonated polyethylene, polyethylene thiab cross-linked polyethylene. Txij li thaum tsis muaj polar substituents nyob rau hauv cov qauv molecular ntawm ethylene-propylene roj hmab, lub zog molecular cohesion yog tsawg, thiab cov saw molecular muaj peev xwm tswj tau yooj yim nyob rau hauv ntau yam, thib ob tsuas yog cov roj hmab ntuj thiab butadiene roj hmab, thiab tseem tuaj yeem tswj tau ntawm qhov kub thiab txias. Vim tias tsis muaj cov pab pawg nquag hauv cov qauv molecular ntawm ethylene-propylene roj hmab, lub zog cohesive yog tsawg, thiab cov roj hmab sib xyaw yog yooj yim tawg, thiab nws tus kheej adhesion thiab kev sib nrig sib adhesion tsis zoo heev.