Ko da yake yana iya zama kamar ƙaramin daki-daki, kayan O-ring na bawul ɗin yana da mahimmanci. Kayan zai iya ƙayyade yawan haƙurin zafin jiki na hatimi. Hakanan yana ba da hatimi wasu juriya na sinadarai, kuma wasu nau'ikan roba sun dace da ruwa daban-daban. Abubuwan gama gari guda biyu don bawul ɗin ƙwallon ƙwallon ƙwallon ƙafa na gaske sune Viton da EPDM.

Viton (hoto a dama) roba ce ta roba tare da babban sinadari da juriya na zafin jiki. EPDM yana nufin Ethylene Propylene Diene Monomer kuma yana da nasa kaddarorin da suka sa ya zama sanannen kayan O-ring. Lokacin kwatanta Viton zuwa EPDM, dole ne a yi la'akari da abubuwa da yawa: haƙurin zafin jiki, dacewa da sinadarai, da farashi. Karanta don cikakken kwatance.

EPDM roba hatimi
EPDM roba (EPDM roba) roba ne mai rikitarwa kuma mara tsada tare da fa'idar amfani. Yawancin lokaci ana amfani da shi don hana ruwa na rufin saboda EPDM yana rufe da kyau. Hakanan abu ne na yau da kullun don hatimin injin daskarewa saboda insulator ne kuma yana da kyakkyawan juriya mara zafi. Musamman, EPDM yana aiki yadda ya kamata a cikin kewayon zafin jiki na -49F zuwa 293F (-45C zuwa 145C), yana mai da shi manufa don aikace-aikace a kowane zafin jiki.

Duk da yake yawancin roba suna jure yanayin zafi, kaɗan ne kawai ke iya ɗaukar ƙananan yanayin zafi kamar EPDM. Wannan ya sa ya zama zaɓi na farko ga duk wanda ke ƙoƙarin rufewa a cikin yanayin sanyi ko tare da kayan sanyi. True Union Ball Valves tare daEPDM Hatimin O-RingsAikace-aikace na yau da kullun don EPDM sun haɗa da rufin lantarki, rufin ruwa, famfo, masu tara hasken rana, O-rings, da ƙari.

Baya ga mafi girman jurewar zafin jiki, EPDM yana da faffadan juriyar sinadarai. Waɗannan sun haɗa da ruwan zafi, tururi, kayan wanke-wanke, maganin potassium caustic, mafitacin sodium hydroxide, man silicone / man shafawa, da sauran sinadarai masu diluted da yawa. Bai dace da amfani da kayan mai na ma'adinai kamar mai mai, mai ko mai ba. Don takamaiman daidaituwar sinadarai na EPDM, danna nan. Waɗannan kaddarorin masu ban sha'awa, haɗe tare da ƙarancin farashin sa, sun sa EPDM ya zama sanannen kayan rufewa.

Viton ya rufe
Viton shine roba roba da kuma fluoropolymer elastomer. "Fluoropolymer" yana nufin cewa wannan abu yana da babban juriya ga kaushi, acid da tushe. Kalmar “elastomer” tana iya musanya ta asali da “roba”. Ba za mu tattauna bambanci tsakanin elastomer da roba a nan ba, amma za mu tattauna abin da ya sa Viton ya zama na musamman. Abun yawanci ana siffanta shi da launin kore ko launin ruwan kasa, amma abin da ya bambanta shi da gaske shine yawan sa. Yawan Viton yana da girma fiye da yawancin nau'ikan roba, yana mai da hatimin Viton daya daga cikin mafi ƙarfi.

Viton yana da kewayon juriyar yanayin zafi mai faɗi daga -4F zuwa 410F (-20C zuwa 210C). Babban yanayin zafi da Viton zai iya jurewa ya sa ya dace don aikace-aikacen zafin jiki. Ana yawan amfani da Viton a cikin O-zobba, safofin hannu masu jurewa da sinadarai da sauran samfuran gyare-gyare ko extruded. O-zoben da aka yi daga Viton suna da kyau don nutsewar ruwa, injin mota da bawuloli daban-daban.

Lokacin da ya zo ga juriya na sinadarai, Viton bai dace ba. Yana ƙin lalata daga nau'ikan ruwaye da sinadarai iri-iri fiye da kowane elastomer mara-fluorinated. Ba kamar EPDM ba, Viton ya dace da mai, mai, mai mai da yawancin inorganic acid. Hakanan yana da matukar juriya ga matsawa, iskar oxygen da iskar shaka, hasken rana, yanayin yanayi, makamashin injin oxygenated, aromatics, fungi, mold, da ƙari. Hakanan a zahiri yana da juriya ga konewa fiye da sauran rubbers. Kara karantawa game da abubuwan da ake yi da abubuwan da ba a yi na sinadarai na Viton ba.

Babban matsala tare da Viton shine farashin sa. A cikin samarwa, yana da kusan sau 8 don ƙirƙira adadin abu ɗaya kamar EPDM. Lokacin siyan samfur wanda ya ƙunshi ƙaramin adadin waɗannan kayan roba kawai, farashin bazai bambanta sosai ba. Amma lokacin yin oda da yawa, zaku iya tsammanin sassan Viton sun fi EPDM tsada sosai.

Viton da EPDM hatimi
Viton vs EPDM Seling Rubber Chart

To wanne abu ne mafi kyau? Waɗannan tambayoyin ba cikakke ba ne masu adalci. Dukansu kayan suna da takamaiman aikace-aikace inda suke da kyau, don haka duk ya dogara da aikin da za su yi. Mu CPVC Ball Check Valvesda CPVC Swing Check Valves suna samuwa tare da hatimin Viton ko hatimin EPDM. Ana yin waɗannan hatimin da O-zoben da aka sanya a cikin kayan aiki. Wadannan bawuloli an yi su ne don a wargaje su cikin sauƙi don kulawa cikin sauƙi, don haka suna da jikin da ake cirewa.

Idan kuna buƙatar bawul don tsarin ruwa, ba tare da la'akari da zafin jiki ba, bawul mai hatimin EPDM yawanci shine mafi kyawun zaɓi. Baya ga juriyar yanayin zafi daban-daban, babban bambanci tsakanin kayan biyu shine juriyarsu ta sinadarai. Viton yana da kyau don amfani da man fetur da sauran abubuwa masu lalata, amma lokacin da ake hulɗa da wani abu marar lahani kamar ruwa, wannan matsananciyar dorewa ba dole ba ne.