Txawm hais tias nws zoo li yog ib qho me me xwb los, cov khoom siv O-ring ntawm lub valve tseem ceeb heev. Cov khoom siv no tuaj yeem txiav txim siab qhov kub thiab txias ntawm lub foob. Nws kuj tseem ua rau lub foob tiv taus tshuaj lom neeg, thiab qee hom roj hmab sib xws nrog cov kua dej sib txawv. Ob qho khoom siv rau lub pob valve sib koom ua ke yog Viton thiab EPDM.

Viton (daim duab sab xis) yog cov roj hmab ua los ntawm cov khoom siv uas tiv taus tshuaj lom neeg thiab kub. EPDM sawv cev rau Ethylene Propylene Diene Monomer thiab muaj nws cov yam ntxwv uas ua rau nws yog cov khoom siv O-ring nrov heev. Thaum piv Viton rau EPDM, ntau yam yuav tsum tau xav txog: kev kam rau kub, kev sib raug zoo ntawm tshuaj lom neeg, thiab tus nqi. Nyeem ntxiv rau qhov kev sib piv tag nrho.

Cov roj hmab EPDM foob
Roj hmab EPDM (EPDM roj hmab) yog ib hom roj hmab nyuaj thiab pheej yig uas muaj ntau yam kev siv. Feem ntau nws siv rau kev tiv thaiv dej ntawm lub ru tsev vim EPDM kaw zoo. Nws kuj yog ib yam khoom siv rau cov foob khov vim nws yog ib yam khoom rwb thaiv tsev thiab muaj kev tiv taus kub tsawg heev. Tshwj xeeb, EPDM ua haujlwm tau zoo hauv qhov kub ntawm -49F txog 293F (-45C txog 145C), ua rau nws zoo tagnrho rau kev siv ntawm txhua qhov kub.

Txawm hais tias ntau cov roj hmab tiv taus qhov kub siab, tsuas yog ob peb tug tuaj yeem tswj tau qhov kub qis dua xws li EPDM. Qhov no ua rau nws yog thawj qhov kev xaiv rau txhua tus neeg uas sim kaw hauv qhov chaw txias lossis nrog cov ntaub ntawv txias. True Union Ball Valves nrog EPDM Sealed O-Rings Cov ntawv thov ib txwm muaj rau EPDM suav nrog kev rwb thaiv hluav taws xob, pas dej ua ke, plumbing, solar panel collectors, O-rings, thiab ntau dua.

Ntxiv rau qhov ua tau zoo dua qhov kub thiab txias, EPDM muaj kev tiv taus tshuaj lom neeg dav dav. Cov no suav nrog dej kub, pa dej, tshuaj ntxuav, cov kua caustic potash, cov kua sodium hydroxide, roj silicone / roj, thiab ntau lwm yam kua qaub thiab tshuaj lom neeg diluted. Nws tsis haum rau siv nrog cov khoom siv roj av xws li cov roj lubricating, roj lossis roj. Yog xav paub txog kev sib raug zoo ntawm EPDM, nyem qhov no. Cov yam ntxwv zoo kawg no, ua ke nrog nws tus nqi qis, ua rau EPDM yog cov khoom siv sealing nrov heev.

Cov roj hmab Viton
Viton yog ib hom roj hmab ua los ntawm cov khoom siv hluavtaws thiab fluoropolymer elastomer. "Fluoropolymer" txhais tau hais tias cov khoom no muaj kev tiv taus cov kuab tshuaj, cov kua qaub thiab cov hauv paus. Lo lus "elastomer" yeej hloov tau nrog "roj hmab". Peb yuav tsis tham txog qhov txawv ntawm elastomer thiab roj hmab ntawm no, tab sis peb yuav tham txog dab tsi ua rau Viton tshwj xeeb heev. Cov khoom siv feem ntau muaj xim ntsuab lossis xim av, tab sis qhov ua rau nws txawv yog nws qhov ceev. Qhov ceev ntawm Viton siab dua li feem ntau hom roj hmab, ua rau Viton foob yog ib qho muaj zog tshaj plaws.

Viton muaj qhov kub thiab txias ntau yam txij li -4F txog 410F (-20C txog 210C). Qhov kub siab uas Viton tuaj yeem tiv taus ua rau nws zoo tagnrho rau kev siv kub siab. Viton feem ntau siv rau hauv O-rings, hnab looj tes tiv taus tshuaj lom neeg thiab lwm yam khoom molded lossis extruded. O-rings ua los ntawm Viton zoo heev rau kev dhia dej scuba, cav tsheb thiab ntau yam valves.

Thaum nws los txog rau kev tiv thaiv tshuaj lom neeg, Viton tsis muaj qhov sib piv. Nws tiv taus kev xeb los ntawm ntau yam kua thiab tshuaj ntau dua li lwm cov elastomer uas tsis muaj fluorinated. Tsis zoo li EPDM, Viton sib xws nrog roj, roj, roj nplua nyeem thiab feem ntau cov inorganic acids. Nws kuj tseem tiv taus kev nias, atmospheric oxidation, tshav ntuj, huab cua, oxygenated roj cav, aromatics, fungi, pwm, thiab ntau ntxiv. Nws kuj tseem tiv taus kev kub hnyiab ntau dua li feem ntau lwm cov roj hmab. Nyeem ntxiv txog cov tshuaj Viton ua thiab tsis ua.

Qhov teeb meem tseem ceeb nrog Viton yog nws tus nqi. Hauv kev tsim khoom, nws raug nqi li 8 npaug ntau dua los tsim cov khoom siv zoo ib yam li EPDM. Thaum yuav cov khoom uas muaj tsuas yog me me ntawm cov khoom siv roj hmab no, tus nqi yuav tsis txawv ntau. Tab sis thaum xaj ntau ntau, koj tuaj yeem cia siab tias cov khoom Viton yuav kim dua EPDM.

Cov ntsaws ruaj ruaj Viton thiab EPDM
Daim Ntawv Qhia Txog Roj Hmab Viton vs EPDM Sealing

Yog li cov khoom siv twg zoo tshaj? Cov lus nug no tsis ncaj ncees kiag li. Ob qho khoom siv muaj cov ntawv thov tshwj xeeb uas lawv zoo rau, yog li nws txhua yam nyob ntawm txoj haujlwm uas lawv yuav ua. PebCPVC Pob Tshawb Xyuas Li QubthiabCPVC Viav Vias Kos Valvesmuaj cov foob Viton lossis EPDM. Cov foob no yog ua los ntawm O-rings ntsia rau hauv cov khoom siv. Cov li qub no yog tsim los kom yooj yim disassembled rau kev saib xyuas yooj yim, yog li lawv muaj lub cev tshem tau.

Yog tias koj xav tau lub valve rau lub tshuab dej, txawm tias qhov kub thiab txias li cas los xij, lub valve nrog lub foob EPDM feem ntau yog qhov kev xaiv zoo tshaj plaws. Sib nrug ntawm qhov sib txawv me ntsis ntawm qhov kub thiab txias, qhov sib txawv tseem ceeb ntawm ob yam khoom yog lawv cov tshuaj tiv thaiv. Viton zoo heev rau kev siv nrog roj thiab lwm yam khoom siv corrosive, tab sis thaum cuam tshuam nrog qee yam tsis muaj teeb meem zoo li dej, qhov kev ruaj khov heev no tsis tsim nyog.

Viton yog qhov zoo tagnrho yog tias koj xav tau qhov ruaj khov tshaj plaws hauv cov xwm txheej ntxhov siab. Raws li tau hais Ua ntej, Viton cov foob tau tuav hauv yuav luag txhua hom kev xeb thiab acidity. Txawm hais tias EPDM nws tus kheej yog qhov ruaj khov heev, nws tsis tuaj yeem sib piv Viton hauv kev tiv thaiv tshuaj lom neeg.

Hauv tsab xov xwm no, peb tau piv ob yam khoom siv: Viton vs EPDM, qhov twg zoo dua? Cov lus teb yog tias ob qho tsis zoo dua li lwm yam. Lawv txhua tus yog cov khoom siv zoo nrog kev siv tsis kawg. Thaum koj yuav tsum xaiv ntawm lawv, saib qhov kub uas koj yuav raug rau lawv, cov tshuaj uas koj yuav raug rau lawv, thiab qhov tseem ceeb tshaj plaws, koj cov peev nyiaj. Xyuas kom tseeb tias koj tau txais lub valve uas koj xav tau ntawm tus nqi tsis muaj kev sib tw!