Txawm hais tias nws yuav zoo li me me, cov khoom siv O-ring valve tseem ceeb heev. Cov khoom siv tuaj yeem txiav txim siab qhov kub thiab txias ntawm lub foob. Nws kuj tseem muab lub foob qee yam tshuaj tiv thaiv, thiab qee hom roj hmab sib xws nrog cov kua dej sib txawv. Ob yam khoom siv rau lub koomhaum tiag tiag pob li qub yog Viton thiab EPDM.

Viton (daim duab rau sab xis) yog cov roj hmab hluavtaws uas muaj tshuaj lom neeg thiab kub ua haujlwm. EPDM sawv cev rau Ethylene Propylene Diene Monomer thiab muaj nws tus kheej cov khoom uas ua rau nws nrov heev O-ring khoom. Thaum muab piv Viton rau EPDM, ntau yam yuav tsum tau txiav txim siab: qhov kub thiab txias, kev sib haum xeeb ntawm cov tshuaj, thiab tus nqi. Nyeem rau qhov kev sib piv tag nrho.

EPDM roj hmab foob
EPDM roj hmab (EPDM roj hmab) yog ib qho nyuaj thiab pheej yig roj hmab nrog ntau yam kev siv. Nws feem ntau yog siv rau ru tsev waterproofing vim EPDM seals zoo. Nws kuj yog ib qho khoom siv rau lub freezer seals vim nws yog ib qho insulator thiab muaj qhov kub thiab txias tsis kam. Tshwj xeeb, EPDM ua haujlwm zoo nyob rau 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 muaj qhov kub thiab txias, tsuas yog ob peb tus tuaj yeem ua rau qis qis dua li EPDM. Qhov no ua rau nws yog thawj qhov kev xaiv rau txhua tus neeg sim kaw hauv qhov chaw txias lossis nrog cov ntaub ntawv txias. Tseeb Union Pob Valves nrogEPDM kaw O-RingsCov ntawv thov rau EPDM muaj xws li hluav taws xob rwb thaiv tsev, pas dej ua ke, cov kav dej, cov khoom siv hnub ci, O-rings, thiab lwm yam.

Ntxiv nrog rau qhov kub siab dua, EPDM muaj cov tshuaj tiv thaiv dav dav. Cov no suav nrog cov dej kub, chav dej, tshuaj ntxuav tes, cov tshuaj caustic potash, sodium hydroxide tov, silicone roj / roj, thiab ntau lwm cov kua qaub thiab tshuaj lom neeg. Nws tsis haum rau kev siv nrog cov khoom siv roj ntxhia xws li lubricating roj, roj lossis roj. Rau cov tshuaj sib haum xeeb ntawm EPDM, nyem qhov no. Cov khoom zoo nkauj no, ua ke nrog nws tus nqi qis, ua rau EPDM yog cov khoom sib khi nrov heev.

Viton seals
Viton yog cov roj hmab hluavtaws thiab fluoropolymer elastomer. "Fluoropolymer" txhais tau hais tias cov khoom no muaj kev tiv thaiv siab rau cov kuab tshuaj, cov kua qaub thiab cov hauv paus. Lo lus "elastomer" yog qhov hloov pauv tau nrog "rubber". 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. Cov khoom siv feem ntau yog cov xim ntsuab lossis xim av, tab sis qhov twg ua rau nws sib nrug yog nws qhov ntom. Viton lub ntom ntom yog qhov siab dua ntau dua li ntau cov hom roj hmab, ua rau viton foob ib qho muaj zog tshaj.

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

Thaum nws los txog rau tshuaj tiv thaiv, Viton yog unmatched. Nws tiv thaiv corrosion los ntawm ntau yam kua thiab tshuaj ntau dua li cov uas tsis yog-fluorinated elastomer. Tsis zoo li EPDM, Viton yog sib xws nrog roj, fuels, lubricants thiab feem ntau inorganic acids. Nws kuj tseem tiv taus compression, atmospheric oxidation, tshav ntuj, huab cua, oxygenated motor fuels, aromatics, fungi, pwm, thiab lwm yam. Nws kuj yog inherently resistant rau hlawv ntau tshaj li lwm yam roj hmab. Nyeem ntxiv txog qhov ua thiab tsis txhob ntawm Viton tshuaj.

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

Viton thiab EPDM foob
Viton vs EPDM Sealing Rubber Daim ntawv qhia

Yog li cov khoom twg yog qhov zoo tshaj plaws? 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 txhua yam nyob ntawm txoj haujlwm lawv yuav ua. Peb CPVC Pob Check Valvesthiab CPVC Vijtsam Check Valves muaj nrog Viton cov ntsaws ruaj ruaj lossis EPDM cov ntsaws ruaj ruaj. Cov ntsaws ruaj ruaj no yog ua los ntawm O-rings ntsia hauv fittings. Cov li qub no yog txhua yam 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, tsis hais qhov kub thiab txias, lub valve nrog EPDM foob feem ntau yog qhov kev xaiv zoo tshaj. Ib cag ntawm qhov sib txawv me ntsis ntawm qhov kub thiab txias, qhov sib txawv tseem ceeb ntawm ob cov ntaub ntawv yog lawv cov tshuaj tiv thaiv. Viton yog qhov zoo rau kev siv roj thiab lwm yam khoom siv corrosive, tab sis thaum cuam tshuam nrog ib yam dab tsi tsis zoo li dej, qhov kev ua haujlwm hnyav no tsis tsim nyog.