I-EPDM gasket: izicelo ezizinzileyo zoshishino? 

Uva i-EPDM gasket kunye nokuzinza kukuphefumula okufanayo, kwaye ukusabela ngokukhawuleza kwezinye izangqa kuyinto encinci yokugculela. Ingcinga ihamba: yirabha eyenziweyo, evela kwi-petrochemicals, ngoko ingaba inokuzinza njani ngokwenene? Lilonke elo nqanaba lithathayo, kwaye liphosa lonke ibali lobomi bomjikelo wokusebenza. Emva kokucacisa nokubona la matywina angaphumeleli kwaye aphumelele ebaleni, ingxabano yozinzo ayikho malunga nemvelaphi yempahla ekrwada iyodwa-imalunga nokuphila ixesha elide, ukugcinwa kwamandla, kunye nokunciphisa imijikelo yokutshintshwa iyonke. Ukuba i-gasket ihlala iminyaka eli-15 endaweni ye-5, oko kukuncitshiswa okukhulu kwenkunkuma, ixesha lokunciphisa, kunye namandla afakwe kwimveliso kunye nofakelo. Kulapho incoko yokwenyani iqala khona.

I-Equation Yokuhlala ixesha elide: Ngakumbi kunokumelana neMozulu nje

Wonke umntu uyayazi iqhinga leqela le-EPDM: ukuchasana okubalaseleyo kwi-ozone, i-UV, kunye nemozulu. Le yincwadi yokufunda. Kodwa uloyiso oluzinzileyo luvela kwinto ekuvumelayo ukuxhathisa kwiindawo zokwenyani, ezonakeleyo kwimizi-mveliso. Ndithetha malunga nokuhamba ngebhayisikile eshushu kwimibhobho yokufudumeza yesithili, okanye ukuxinana rhoqo kwiiflange ezipholisa iinqaba. Kwiprojekthi enye yokubuyisela umbhobho wesityalo sekhemikhali saphakathi kwinkulungwane, sitshintshe umxube wokuguga we-neoprene kunye ne-nitrile seals kwi-EPDM. Amatywina angaphambili ayethotywa rhoqo emva kweminyaka emi-3-4, okukhokelela ekuvuzeni komphunga kunye nemijikelo eqhubekayo yokulungisa. Ii-EPDM esizifaka kuzo? Siyazilandela, kwaye azibonakalisi iseti yoxinzelelo olubalulekileyo okanye ukuqhekeka komphezulu emva kweminyaka esi-8. Leyo yimijikelo emibini epheleleyo yokugcina ithintelwe. Inkunkuma ephuma kwezo gaskets zindala—ehlala ingcolisekile kwaye ingenakuphinda isetyenziswe—iyayeka ukuveliswa.

Ubomi obude buguqulela ngokuthe ngqo kulondolozo lwemithombo. Awusoloko usebenzisa izinto ezintsha eziluhlaza, amandla okuvelisa, okanye i-fuel kwi-logistics ukuthumela iindawo ezitshintshileyo. Ndikhumbula ingxoxo-mpikiswano kunye nomphathi wokuthengwa kwempahla egxile kuphela kwixabiso leyunithi nganye. Inketho ye-EPDM yayiyi-30% ebiza kakhulu ngaphambili. Kuye kwafuneka sakhe ityala elibonisa ixabiso lilonke lobunini, kubandakanywa umsebenzi wokuvalwa okongeziweyo kabini kunye nokulahleka kwamanzi ngenxa yokuvuza. Xa isakhelwe njenge isicelo soshishino oluzinzileyo, imbono yexesha elide iphumelele. Yinto esebenzayo, hayi ifilosofi, ukuzinza.

Kukho i-caveat, kunjalo. Oku komelela kuxhomekeke kukhetho olufanelekileyo. I-EPDM idume ngokuhlwempuzeka ngenxa yeeoyile ezininzi ezisekwe kwipetroleum kunye nolwelo. Ndiyibonile isilela ngokumangalisayo kwaye ngokukhawuleza kumgca wokuhambisa i-lubricant apho umntu ebecinga ukuba irabha yirabha. Oko kusilela kwakungekho uphawu oluchasene nokuzinza kwe-EPDM; ibiluphawu oluchasene nokusebenza kakubi kwezobunjineli. Isicelo esizinzileyo sisicelo esichanekileyo.

Ukusebenza kakuhle kwamandla: uQhagamshelwano lwe-Insulation

Le yi-engile engacacanga kodwa ebaluleke kakhulu. Kwi-HVAC kunye ne-industrial insulation systems, i-gasket yinxalenye yemvulophu ye-thermal. Itywina elinomngcipheko likhokelela ekudibaneni kobushushu kunye nokulahleka kwamandla. Isakhiwo se-polymer esizinzile se-EPDM kunye ne-thermal conductivity ephantsi yenza ukuba kube yinto ekhethekileyo yokukhetha i-insulating jacket ye-insulating, iipaneli zokufikelela kwiibhoyili, okanye i-ductwork flanges. Sisebenze kwikhampasi yokuphucula amandla eyunivesithi apho bebeleqa ukuncitshiswa kwe-10% kwilahleko yezityalo zokufudumeza. Inxalenye ebalulekileyo yophicotho-zincwadi ibonise ukuthotywa kwezitywina kumakhulu amazibuko okuhlolwa. Ukucacisa i-gasket ye-foam ye-EPDM evaliweyo apha yenza izinto ezimbini: yenza umqobo womoya othembekileyo, kunye nezixhobo zokukhusela izinto eziphathekayo zongeza ixabiso elingaphezulu le-R. Imbuyekezo ibalwe ngeenyanga, hayi iminyaka, ngamandla agciniweyo kuphela. Olo luzinzo lokusebenza kunye ne-metric yemali ngokuthe ngqo.

Akunjalo nje ngokugcina ubushushu. Kwifriji kunye nokugcinwa okubandayo, ukuthintela ukufudumala, ukungena komoya omanzi kuyo yonke into. Isiganeko sokungena sinyanzela inkqubo ukuba isebenze nzima, isebenzise umbane omninzi, kwaye inokukhokelela ekubunjweni komkhenkce. I-gasket ye-EPDM eyomeleleyo, yobushushu obuphantsi obuguquguqukayo kwiitywina zeminyango isemgangathweni ngenxa yesizathu. Ndithelekise ufakelo usebenzisa i-generic PVC seals ngokuchasene ne-EPDM efanelekileyo. Iingcango ze-EPDM zigcine itywina elihambelanayo ixesha elide, kunye nohlengahlengiso oluncinci olufunekayo. Iilogi zamandla zibonise umahluko obonakalayo kwi-compressor cycle frequency. Olu luhlobo lwegranular, impembelelo enokulinganiswa echaza uzinzo lwehlabathi lokwenyani.

Imiceli mngeni yeSetyhula kunye neNqobo yokuphela koBomi

Masibe lukhuni: ibali lokuphela kobomi kwiigaskets ezininzi ze-EPDM ayikho isetyhula. Zizinto ze-thermoset. Awukwazi ukuzinyibilikisa kwaye uziguqule njenge-thermoplastic. Kwiindawo ezininzi zokususwa kwemizi-mveliso, zigalelwe umhlaba okanye zitshiswe ukuze kubuyiselwe amandla. Le yeyona nto iphikisana nebango lozinzo, kwaye iyasebenza. Impendulo yoshishino ayikho ekuhlaziyeni kwakhona i-gasket esetyenzisiweyo, kodwa ekuyileni ixesha elide kakhulu, njengoko kuxoxiwe, kunye nokuphonononga umxholo osetyenzisiweyo ekuveliseni i-EPDM entsha.

Ezinye iikhompawundi ngoku zibonelela ngamabanga e-EPDM anomxholo obalulekileyo we-EPDM ohlaziyiweyo wasemva koshishino. Ayiveli kwi-gaskets endala, ngokuqhelekileyo, kodwa kwinkunkuma ye-trim ngexesha lemveliso yemoto yemozulu okanye i-membrane yokuphahla. Oku kuvala i-loop ngaphakathi kwe-ikhosistim yeshishini. Sivavanye ezinye zezi zixhobo kumthengisi kwiphondo le-Hebei, indawo enkulu yokuvelisa, kwaye ukwehla kokusebenza kunokuba mncinci kwizicelo ezininzi zokutywina ezimileyo. Linyathelo. Kwinkampani efana I-Sunnian Zitai Festener Fishaner Comment Com., ibekwe entliziyweni yesiseko semveliso yecandelo laseTshayina e-Yongnian, ukufikelela kwimithombo enjalo yezinto eziphathekayo kunye nezixhobo zokuzibandakanya kwi-fastener kunye nokutywinwa kweendibano kuyinzuzo ebonakalayo. Isikhundla sabo esikufuphi nemithambo emikhulu yezothutho efana neBeijing-Guangzhou Railway kunye neNational Highway 107 ithetha ukuba banokuzifumana ngokufanelekileyo ezi mathiriyeli kwaye basasaze iimveliso ezigqityiweyo, okunokubakho ukuthoba i-carbon footprint yekhonkco lokubonelela ngokwalo. Ungafumana indlela yabo yokwenziwa kwemveliso edibeneyo https //wwww.ziitasteners.com.

Enye indlela yokuphela kobomi kukuyila ukwehlisa ibhayisekile. Ndibone izitywina zetanki ezindala ze-EPDM, xa sele zicociwe, zisikwa kwaye zisetyenziswe njenge-padding, i-anti-vibration mats, okanye nakwindawo yokudlala. Ayiloxabiso eliphezulu lokurisayikilisha, kodwa luphambuko olusuka kwindawo yokulahla inkunkuma. Injongo kufuneka ibe kukwenza ixesha lokutshintsha libe lide kangangokuba ukuphela kobomi kube yingxaki ekude, engaqhelekanga.

Imeko ekhoyo: Unyango lwamanzi vs. Aggressive Chemicals

Amanzi kunye neendawo zokucocwa kwamanzi amdaka ngumhlaba obonisa umdla. Apha, ukuzinza kuthetha ukuthintela ukosuleleka kunye nokuqinisekisa amashumi eminyaka yenkonzo ethembekileyo. I-EPDM yinkwenkwezi yoqhagamshelwano lwamanzi okusela (intlanganiso ye-NSF / ANSI 61) kunye nokuphatha uluhlu olubanzi lwe-acids dilute, i-alkali, kunye neekhemikhali ze-polar ezifunyenwe kwiinkqubo zonyango. Kwitanki yokucacisa i-retrofit yesibini, sisebenzise igasket ye-EPDM exineneyo, enyangelwe ngeperoxide kwiflange ebolithiweyo enobubanzi obukhulu. Imekobume ibisoloko ifumile, ikhula ngobulembu ngamaxesha athile, kunye nokuvezwa kancinci kweekhemikhali kwinkqubo yonyango.

Enye into eyayiqwalaselwa yayiyi-PTFE-based gasket. Ngelixa i-inert yekhemikhali engakumbi, yinto esebenza ngamandla kakhulu ukuvelisa kwaye ithanda ukuhamba okubandayo (i-creep) phantsi komthwalo we-bolt, ifuna ukuphinda kuqhutyelwe kwakhona. Inketho ye-EPDM inikeze isitywina esithembekileyo esineempawu ezintle zokubuyisela, ezifakwe kanye kwaye zikhohliwe. Kwiminyaka emihlanu phambili, akukho kuvuza, akukho londolozo. Ubalo lozinzo apha lubalwe kumngcipheko othintelweyo wokuchitheka kokusingqongileyo, amandla aqukiweyo e-PTFE, kunye nomsebenzi wolondolozo. I I-EPDM GARKIT yayilolona khetho lugcinakeleyo ngakumbi, nasecaleni kwemathiriyeli yeprimiyamu efana ne-PTFE.

Imodi yokungaphumeleli ukuqaphela: kunyango oluphambili okanye ukuphatha i-sludge ngegrisi ephezulu kunye nomxholo we-hydrocarbon, i-EPDM iya kuba yinto embi kakhulu. Kulapho ukuchaneka kuyinkosi. Uzinzo asiyobheji-into enye-ilingana-zonke.

Ukucacisa uZinzo: UMtyholi kwiiNkcukacha

Ke, ulwenza njani ngokwenene ukhetho oluzinzileyo? Iqala kwiphepha leenkcukacha. Musa ukubhala nje i-EPDM gasket. Oko kukonqena. Cacisa ikhompawundi: cela ukwakheka kweseti yoxinzelelo oluphantsi (ASTM D395), unyango lweperoksayidi lokumelana nobushushu bexesha elide, kunye nobunzima obuthile obuphezulu ukuba ufuna itywina elishinyeneyo, elimelana ne-extrusion. Buza ngesiqulatho esenziwe ngokutsha. Eli nqanaba leenkcukacha libonisa abavelisi ukuba ukusebenza kunye nomjikelo wobomi kubalulekile.

Ndifunde oku ngokusilela okungephi. Sayala i-EPDM eqhelekileyo kumgca wamanzi ashushu aphantsi. Isebenze kakuhle kubushushu, kodwa ikhompawundi ibithambile kakhulu. Ngaphezu kweminyaka emibini, iye yafumana i-extrusion ebalulekileyo kwiiflange ezingalinganiyo, ezikhokelela ekuvuzeni okucothayo. Imveliso yexesha elide ezinzileyo ayiphumelelanga ngenxa yokuba asizange sicacise ngoxinzelelo lomatshini. Sayitshintsha ibe nzima, i-80-durometer, i-EPDM eqiniswe ngelaphu. Ikhona ukusukela oko. Isifundo: uzinzo lufuna ubunjineli obuchanekileyo. Ayisiyonto yokuthengisa; sisiphumo senzululwazi yezinto ezichanekileyo kunye noyilo.

Ekugqibeleni, sebenzisana nabaqulunqi abayiqondayo le nto. Inkampani efakwe kwisiseko semveliso esinje ngeSithili saseYongnian, esifana neHandan Zitai Fastener, ihlala inamava okusebenza ebaleni. Babona ukusilela okubuyayo kwaye banokucebisa ngokhetho olumbaxa. Ubuchwephesha babo kwiinkqubo ze-fastener bukwathetha ukuba bayayiqonda intsebenziswano ebalulekileyo phakathi kwe-gasket, i-flange surface, kunye nenkqubo yokubhobhoza-konke kubalulekile ekufezekiseni ubomi benkonzo obuthenjisiweyo.

Iingcinga zokuphetha: Isigwebo sePragmatic

Ngaba i-EPDM gasket yinxalenye yoshishino oluzinzileyo? Impendulo nguewe onemiqathango. Uzinzo lwayo aluyonto yemvelo kodwa luyafezekiswa. Iphunyezwe ngokwandisa ukuqina kwayo okudumileyo ukuze kuphume ezinye iindlela, ngaloo ndlela kuncitshiswe inkcitho kunye neempembelelo zamandla eziqulathwe ngokuhamba kwexesha. Yongezwa ngendima yayo ekuphuculeni ukusebenza kakuhle kwamandla kwiinkqubo ezishushu. Iprofayili yayo iphuculwe ngokubandakanya umxholo ohlaziyiweyo kunye nolungiselelo olusebenzayo oluvela kubavelisi kwiindawo ezidibeneyo zokuvelisa.

Esona sisongelo sikhulu kwisiqinisekiso sayo esizinzileyo kukusetyenziswa gwenxa. Ukusetyenziswa ngokuchanekileyo, kwindawo efanelekileyo yeekhemikhali kunye ne-thermal, i-EPDM itywina yenye yezona zinto zithembekileyo kwaye zihlala ixesha elide. Obo bomi bude busisiseko sengxoxo yayo yokusingqongileyo. Ayizukusombulula iphazili yokuphinda isetyenziswe kwe-thermoset, kodwa ngokuhlala amashumi eminyaka, ityhala loo ngxaki kude kwixesha elizayo ngelixa ihambisa ukusebenza kakuhle namhlanje. Ekugqibeleni, i-gasket eyona nto izinzileyo yileyo akufuneki uyitshintshe.