Ukukhetha impahla efanele ye-gasket kungesinye sezinqumo ezibaluleke kakhulu ekuvaleni kwezimboni, kodwa kuvame ukunganakwa kuze kube yilapho kugqabhuka uketshezi. I-gasket isebenza njengophawu lokuvula olugcwalisa isikhala phakathi kwezindawo ezimbili ezihlangana, ivimbela ukuphuma koketshezi, amagesi, nokungcola ngaphansi kwezimo ezahlukahlukene zokusebenza. Imiphumela yokukhetha i-gasket engafanele ingaba nzima, kusukela ekulahlekelweni kwesikhathi okubizayo nokungcoliswa komkhiqizo kuya ezingozini ezinkulu zokuphepha nokulimala kwemvelo. Phakathi kwezinhlobonhlobo zezinto zokuvula ezenziwe nge-elastomer ezitholakalayo namuhla, izinto ezintathu zigqama ngokuguquguquka kwazo nokusetshenziswa kabanzi ezimbonini: i-EPDM (Ethylene Propylene Diene Monomer), i-FKM (Fluorocarbon rubber, evame ukubizwa nge-Viton), ne-NBR (Nitrile Butadiene Rubber, evame ukubizwa nge-Buna-N). Ngayinye yalezi zinto ze-elastomer inikeza izici ezihlukile zokumelana namakhemikhali, amazinga okushisa, nezici zomshini eziyenza zifanelekele izinhlelo ezithile nezinto ezithile. Ukuqonda lokhu kwehluka kubalulekile konjiniyela, ochwepheshe bokunakekela, nochwepheshe bokuthenga abadinga ukuqinisekisa ukusebenza okuthembekile kokuvula emisebenzini yabo.

Lo mhlahlandlela ophelele uzokuhambisa ezakhiweni, izinzuzo, imikhawulo, kanye nokusetshenziswa okufanelekile kwama-gasket e-EPDM, FKM, ne-NBR. Sizoqhathanisa lezi zinto ngqo mayelana nokuhambisana namakhemikhali, amazinga okushisa nokucindezela, kanye nezindleko uma kuqhathaniswa nokusebenza, ngaphambi kokunikeza uhlaka olusebenzisekayo lokukhetha olusekelwe ohlotsheni lwezinto zezimboni ozisingatha. Ekugcineni kwalesi sihloko, uzobe usunolwazi oludingekayo ukuze wenze isinqumo esinolwazi sokukhetha impahla ye-gasket ekwandisa impilo yesevisi, inciphise ukunakekelwa, futhi ivikele imishini yakho nabasebenzi. Noma ngabe usebenza nezinhlelo zesitimu, uketshezi lwe-hydraulic, ama-solvent anamandla, noma izinto zezinga lokudla, lo mhlahlandlela ovela ku-Imikhiqizo ihlanganisa konke odinga ukukwazi mayelana nezinto zokugquma zerabha.

EPDM, noma i-Ethylene Propylene Diene Monomer, iyirabha yokwenziwa edume ngokumelana kwayo okumangalisayo nesimo sezulu, i-ozone, imisebe ye-UV, kanye nezinhlobonhlobo zamakhemikhali, ikakhulukazi uketshezi lwe-polar. Umhlane we-polymer we-EPDM ugcwele, okunikeza ukuzinza okukhethekile ekonakaleni kwe-oxidative nasekucindezelekeni kwemvelo, okwenza kube ukukhetha okuphezulu kwezinhlelo zangaphandle nezindawo ezinomswakama omkhulu. Mayelana nokusebenza kwezinga lokushisa, ama-gasket e-EPDM avamise ukusebenza ngempumelelo ebangeni elingaba ngu--40°C kuya ku-150°C, futhi ukusebenza ngezikhathi ezithile kungenzeka emazingeni okushisa aphakeme kancane kuye ngokwakheka nokuhlanganiswa okuthile. Leli bhuloho elibanzi lokusebenza lenza i-EPDM ibe yisixazululo esithembekile ezimbonini ezinjengokuhlanza amanzi, i-HVAC, amasistimu okupholisa ezimoto, nokucubungula ukudla, lapho amanzi ashisayo, umusi, namakhemikhali athambile kuvamile khona. Le nto ibonisa ukumelana okuhle kakhulu nokucindezelwa kwe-compression, okusho ukuthi igcina ubuqotho bayo bokuvala isikhathi eside ngaphandle kokuguqulwa unomphela ngaphansi komthwalo.

Uma kukhulunywa ngokuhambisana namakhemikhali, i-EPDM ikufaneleka kakhulu ukuphatha izinto ezinamandla (polar substances) ezinjengamanzi, ama-asidi ancibilikisiwe, ama-alkali, ama-ketone, utshwala, noketshezi lwe-hydraulic lwe-phosphate ester. Nokho, le nto inesici esibalulekile: ithinteka kalula kakhulu ngamafutha asuselwa kuphethiloli, uphethiloli, ama-hydrocarbon, nama-solvent anuka kamnandi (aromatic solvents), okungabangela ukuvuvukala, ukuthamba, nokonakala ngokushesha. Ngakho-ke, ama-gasket e-EPDM awanconyiwa nhlobo ukuthi asetshenziswe ezinhlelweni zamafutha nophethiloli, futhi onjiniyela kumele baqaphele kakhulu lapho bekhetha le elastomer ezinhlelweni ezibandakanya ama-lubricant noma ama-solvent. Ukusetshenziswa okuvamile kwezimboni kwama-gasket e-EPDM kufaka phakathi ukuvala amaphampu namapayipi athwala amanzi ashisayo, izinhlelo zokushisisa nge-steam, izinhlelo zoketshezi lwe-brake ezobuchwepheshe bezimoto, nama-gasket emishini yokucubungula ukudla neziphuzo okumelwe amelane nezixazululo zokuhlanza ezinamandla (caustic wash-down solutions). Ezinhlelweni ezibandakanya ukuvala okuthambile (soft-seat sealing) kuma-valve, i-EPDM nayo ivame ukukhethwa ngenxa yokuqina kwayo okuhle kanye nokuguquguquka kahle emazingeni okushisa aphansi, okuyivumela ukuthi ivumelane kahle nezindawo ezingalingani zama-flange futhi yakhe ukuvala okuqinile ngisho noma amandla okucindezela ephansi.

I-FKM, evame ukubizwa ngegama lokuhweba i-Viton, iwumndeni wamarubha e-fluorocarbon anikeza izinga eliphezulu kakhulu lokumelana namakhemikhali nokushisa phakathi kwezinto ezivamile zokwenza ama-gasket e-elastomeric. Ukuba khona kwamabhondi aqinile e-carbon-fluorine esakhiweni se-polymer kunikeza ukuzinza okukhethekile, okwenza ama-gasket e-FKM akwazi ukumelana namazinga okushisa asebenza ngokuqhubekayo asukela ku--20°C kuya ku-200°C, kanti nokukhuphuka kwesikhashana kuya ku-250°C kwamukeleka kwezinye izinhlobo eziningi. Lokhu kumelana nokushisa okumangalisayo kwenza i-FKM ibe ukukhetha okuthandwayo ezinhlelweni ezidinga kakhulu lapho amanye ama-elastomer engahluleka khona, njengezinjini zikadizili, izitsha zokucubungula amakhemikhali, izinhlelo zikaphethiloli ze-aerospace, kanye nemishini yasemkhathini kawoyela. Ngaphezu kokumelana nokushisa, i-FKM ikhombisa ukumelana okuhle kakhulu nezinhlobonhlobo zezinto ezinamandla, okuhlanganisa amafutha amaminerali, ama-lubricant okwenziwa, uphethiloli, ama-hydrocarbon anephunga elimnandi, ama-aliphatic solvents, kanye nama-asidi namakhemikhali amaningi aqinile. Le nto futhi imelana kakhulu ne-ozone nokuguquka kwesimo sezulu, okwandisa impilo yayo yokusebenza ezimweni ezinzima zemvelo.

Enye yezinzuzo ezibalulekile zama-gasket e-FKM ikhono lawo okugcina ukusebenza kokuvala ngenkathi evezwe emazingeni aphezulu okushisa nengcindezi kanyekanye, okwenza abe ngabalulekile ezinhlelweni ze-hydraulic nasemishinini esebenza kahle kakhulu. Noma kunjalo, i-FKM ayinaso nje kuphela ukulinganiselwa kwayo. Into ngokuvamile ayihambisani namanzi ashisayo, umusi oshisayo kakhulu, ama-ester nama-ether anesisindo esiphansi samangqamuzana, kanye namanye ama-acid organic, futhi ingonakala uma ivezwe kwizisekelo eziqinile ezifana ne-ammonia nezixazululo ezigxilile ze-caustic. Ukwengeza, i-FKM ibiza kakhulu kune-EPDM ne-NBR, okungaba ukucatshangelwa ezinhlelweni ezinkulu zokuvala, nakuba isikhathi sayo eside sokusebenza nokwethembeka kwayo kuvame ukuthethelela izindleko eziphezulu zokuqala. Izinhlelo ezijwayelekile zama-gasket e-FKM zihlanganisa ukuvala ama-flange ezimbonini zamakhemikhali, ama-seal kaphethiloli ezimotweni nasezindizeni, ama-gasket emishinini yokukhiqiza ama-semiconductor, kanye nezakhi zokuvala ezimile emapayipini kawoyela negesi athutha ama-hydrocarbon anamandla emazingeni aphezulu okushisa. Lapho ukhetha i-gasket ye-FKM, kubalulekile futhi ukucabangela izinga elithile, ngoba ama-polymer e-FKM ahlukene anikeza amazinga ahlukene okumelana namakhemikhali nokusebenza emazingeni aphansi okushisa.

I-NBR, noma i-Nitrile Butadiene Rubber, iyona elastomer esezingeni eliphezulu evamile yokumelana namafutha nophethiloli, eyaziwa kabanzi ngegama layo lokuhweba i-Buna-N. Le nto iyi-copolymer ye-butadiene ne-acrylonitrile, futhi ukumelana kwayo okuhle kakhulu noketshezi olususelwa kuphethiloli kuwumphumela oqondile wokuqukethwe kwe-acrylonitrile esakhiweni sayo samangqamuzana. Ama-gasket e-NBR avame ukusebenza ebangeni lokushisa elingaba ngu--30°C kuya ku-120°C, futhi anikeza izici ezinhle zomshini, okuhlanganisa amandla aphezulu okudonsa, ukumelana nokugqokwa okuhle kakhulu, nokuqina okuvelele. Lezi zici zenza i-NBR ibe ngenye yezinto zokuvala ezingabizi kakhulu neziguquguqukayo ezitholakalayo, ihlanganisa ukusebenza kahle nokonga izindleko ezimweni lapho imikhiqizo kaphethiloli iyona ndlela eyinhloko. Le nto isebenza kahle kakhulu lapho ithintana namafutha amaminerali, amafutha e-hydraulic, uwoyela we-diesel, uphethiloli, amafutha okugcoba, nama-asidi ancibilikisiwe, okwenza ibe ukukhethwa kokuqala ezinhlelweni zezimoto, zasolwandle, neze-hydraulic zezimboni.

Naphezu kokumelana kwayo okuhle namafutha, i-NBR inemikhawulo eminingi ebalulekile okufanele onjiniyela bayikhumbule. Le nto ikhombisa ukumelana kabi ne-ozone, imisebe ye-UV, kanye nesimo sezulu, okunciphisa ukusetshenziswa kwayo ezindaweni zangaphandle ngaphandle uma ihlanganiswe nezakhi zokuvikela. I-NBR nayo ayinconyiwe ukuthi isetshenziswe nama-polar solvents, ama-chlorinated hydrocarbons, ama-oxidizers anamandla, ama-brake fluids aqukethe i-glycol ethers, noma ama-asidi agxilile, ngoba lezi zinto zizobangela ukuvuvukala okukhulu nokonakala. Izinga lokushisa eliphezulu elingaba ngu-120°C nalo lingenye inkinga, ngoba ukuchayeka isikhathi eside emazingeni okushisa aphezulu kuholela ekuqiniseni, ekuqhekekeni, nasekulahlekelweni ukuqina kokuvala. Ukusetshenziswa okujwayelekile kwezimboni kwamagasket e-NBR kufaka phakathi ukuvala amaphampu kawoyela, izinhlelo zokudlulisa amandla, amathangi kaphethiloli, iziqu ze-valve, nezinhlelo ze-hydraulic ezisezingeni lokushisa eliphansi emishinini nasemishinini yokucubungula. Ngenxa yokulingana kwezindleko nokusebenza kahle, i-NBR ihlala iyisinqumo esiyinhloko ezinhlelweni eziningi zokuvala uwoyela nophethiloli, futhi ivamise ukusetshenziswa kanye nama-O-rings nama-seals enziwe ngendlela oyifisayo emishinini eminingi ehlukahlukene.

Uma kuqhathaniswa izinto zokwenziwa ama-gasket e-EPDM, FKM, kanye ne-NBR, izici ezibalulekile okufanele zihlolwe yilezi: ukuhambisana namakhemikhali, ububanzi bezinga lokushisa, amazinga okucindezela, kanye nezindleko zokuthola nokusebenzisa konke. Mayelana nokuhambisana namakhemikhali, akukho kulezi zinto ezintathu ezingama-elastomer okuthi zingamelana nakho konke; kunalokho, ngayinye igqama emkhakheni othile wezinto ezithile. I-EPDM iyona ekhethwayo kuma-polar fluids njengamanzi, umusi, nama-asidi ancibilikisiwe, kodwa ayisebenzi kahle ngamafutha nama-hydrocarbon; i-NBR ilungele amafutha amaminerali, uphethiloli, namafutha okugcoba, kodwa ihluleka uma kukhona i-ozone nama-polar solvents; i-FKM inokumelana namakhemikhali okubanzi kakhulu, imelana namafutha amaningi, uphethiloli, ama-solvents, nama-asidi, kodwa iyahluleka emanzini ashisayo, umusi, nezinye izisekelo ezinamandla. Ishadi elilandelayo elenziwe lula lokuhambisana lifingqa le mehluko: emanzini nasemusini, i-EPDM ihle kakhulu, i-FKM ayilungile, kanti i-NBR ilungile ngokulingene; kumafutha amaminerali nophethiloli, i-EPDM ayilungile, i-FKM ihle kakhulu, kanti i-NBR ihle kakhulu; kuma-aromatic solvents, i-EPDM ayilungile, i-FKM ihle kakhulu, kanti i-NBR ilungile ngokulingene; kuma-asidi ancibilikisiwe, i-EPDM ihle kakhulu, i-FKM ilungile, kanti i-NBR ilungile ngokulingene; futhi ekuchayekeni kwemvelo yangaphandle, i-EPDM ihle kakhulu, i-FKM ihle kakhulu, kanti i-NBR ayilungile.

Izinga lokushisa nokucindezela nazo zihluka kakhulu phakathi kwalezi zinto ezintathu. I-EPDM ibamba ukushisa kusukela ku--40°C kuya ku-150°C, i-NBR ibamba ukushisa kusukela ku--30°C kuya ku-120°C, kanti i-FKM ibamba ukushisa kusukela ku--20°C kuya ku-200°C (nokukhuphuka okulinganiselwe okuphezulu), okusho ukuthi i-FKM iwuhola olucacile emsebenzini wokushisa okuphezulu. Mayelana nokucindezela, zontathu lezi zinto ezinwebekayo zingasebenza kahle uma i-gasket iklanywe ngokufanele ukuhambisana ne-flange nokusebenza kwamandla okubamba, kodwa i-FKM ngokuvamile igcina ukusebenza kwayo kokuvimba ekushiseni okuphezulu lapho ezinye izinto zilahlekelwa ukuguquguquka nokumelana nokucindezelwa. Lapho kuhlolwa izindleko uma kuqhathaniswa nokusebenza, i-NBR iyona inketho engabizi kakhulu, ilandelwe i-EPDM, kanti i-FKM ibiza kakhulu ngeyunithi ngayinye. Kodwa-ke, ukuhlaziywa kwezindleko zobunikazi kufanele kukale intengo yezinto ngokumelene nesikhathi sokusebenza, izindleko zokuma komsebenzi, imvamisa yokulungisa, kanye nemithelela yokuphepha yokwehluleka kokuvimba okungenzeka. Ezinhlelweni eziningi ezinemiphumela emikhulu, intengo ephezulu ye-FKM ithetheleleka kalula ngenxa yesikhathi sayo eside sokusebenza nokusebenza okuphezulu ngaphansi kwezimo ezinzima, kanti emisebenzini ejwayelekile yokuvimba uwoyela, i-NBR inikeza inani elisebenzisekayo kakhulu.

Ukukhetha impahla efanele yegasket ekugcineni kuncike ekuhlaziyweni okucophelelayo kwezinto ezisetshenziswayo ezicutshungulwayo, izimo zokusebenza, kanye nezidingo zokusebenza zohlelo lwakho oluthile lokuvimba ukuvuza. Isinyathelo sokuqala ukuthola kahle ukuthi yiziphi uketshezi noma amagesi azothintana negasket, kuhlanganise nanoma yiziphi izingxenye ezincane, izinto ezingcolisayo, noma ama-cleaning agents angaba khona ngesikhathi sokusebenza. Uma usuyazi into esetshenziswayo, ungabheka ishadi lokuhambisana kwamakhemikhali ukuze unqume ukuthi yimaphi kula ma-elastomer amathathu anokumelana okwamukelekayo, ukhumbula ukuthi izinga lokushisa liphinde lithinte izinga lokonakala kwepholima. Okulandelayo ukucatshangelwa ububanzi bezinga lokushisa lokusebenza, kuhlanganisa nezimo ezizinzile kanye nokukhuphuka okuphezulu, ngoba yonke i-elastomer inewindi lokushisa elichaziwe lapho ngale kwalo izakhiwo zayo zomshini zizonakala ngokushesha. Izinga lokucindezela kufanele futhi lihlolwe kanyekanye nezinga lokushisa, ngoba ingcindezi ephezulu ezingeni lokushisa eliphezulu ibeka ingcindezi ehlangene egasketini engasheshisa ukwehluleka ezintweni ezisondela emikhawulweni yazo yokushisa.

Ngaphezu kwalezi zindlela eziyisisekelo, kufanele futhi uhlole umjikelezo wokusebenza wesistimu yokuvala, ukuba khona kokushintshashintsha kokushisa, ukuchayeka ezintweni zangaphandle zemvelo ezifana ne-ozone noma imisebe ye-UV, kanye nanoma yiziphi izidingo zokulawula noma zokuthobela imithetho ezingase zilawule ukuthintana nokudla noma ukuhlanzeka koketshezi. Emisebenzini yokwelapha amanzi, umusi, nokucubungula ukudla, i-EPDM ivamise ukuba yinketho ephephe kakhulu futhi enongayo kwezomnotho ngenxa yokumelana kwayo namanzi okuhle kanye nokugunyazwa okubanzi kwezinsiza zokudla. Kumafutha, uphethiloli, nezinhlelo ze-hydraulic ezisebenza emazingeni okushisa aphakathi, i-NBR ihlinzeka ngokusebenza okuthembekile ngezindleko eziphansi, okwenza kube yizinga lembonini ezinhlelweni eziningi zika-petroleum. Kumakhemikhali anamandla, amazinga okushisa aphezulu, nezindawo zezimboni ezidinga kakhulu lapho isixazululo esisezingeni eliphezulu sidingeka khona, i-FKM iyinto ekhethwayo, enikeza ukuqina okungenakuqhathaniswa nokumelana namakhemikhali. Ngokuqondanisa ngokuhlelekile uketshezi lwakho nezimo zokusebenza namandla e-elastomer ngayinye, ungafinyelela ekukhetheni kwe-gasket okuletha ukusebenza kokuvula okuthembekile nokuhlala isikhathi eside, kuyilapho ugwema imiphumela ebizayo yokucaciswa kwezinto ezingafanele.

E-Varicpand International, sihlanganisa ubuchwepheshe beminyaka eminingi bokukhiqiza nokulawula ikhwalithi okuqinile ukuze silethe izixazululo zamagasket ezihlangabezana nezidingo ezinzima kakhulu zezimboni. Indawo yethu yokukhiqiza yesimanje ihlome ukukhiqiza ama-gasket e-EPDM, FKM, ne-NBR ngezinhlobo eziningi zobukhulu, ubukhulu, nokucushwa, konke kukhiqizwa ngaphansi kwemikhawulo eqinile futhi kuhlolwe ukuze kuqinisekiswe ukunemba kobukhulu nokuqina kwezinto. Siyaqonda ukuthi uhlelo ngalunye luhlukile, yingakho sinikezela ngezixazululo zamagasket ezingokwezifiso ezihambisana nemithombo yakho ethile, izinga lokushisa, umfutho, nokucaciswa kobukhulu. Ithimba lethu lobunjiniyela lisebenza eduze namakhasimende ukuze likhethe i-elastomer ekahle kunazo zonke kuhlelo ngalunye, linikeze isiqondiso sochwepheshe ekukhetheni izinto, ukwakheka kwegasket, nokuklanywa kwesistimu yokuvala ukuze kukhuliswe ukusebenza nempilo yesevisi. Lokhu kuzibophezela ekunembeni nobunjiniyela obugxile kumakhasimende yisona sizathu sokuthi i-Varicpand ibe umlingani othembekile ezimbonini ezisukela kwezikawoyela negesi kuya ekucubunguleni ukudla nokukhiqiza amakhemikhali.

Ngaphezu kwamandla ethu okukhiqiza, iVaricpand inikeza uchungechunge lokuhlinzeka lomhlaba wonke oluqinisekisa ukulethwa okuthembekile nokusekelwa okuphendulayo noma ngabe imisebenzi yakho ikutholakala kuphi. Izinhlelo zethu zokuphatha ikhwalithi zigunyazwe amazinga omhlaba wonke, futhi yonke ibhetshi yama-gasket ihlolwa ngokuphelele ukuze kuqinisekiswe ukuqina, amandla okudonsa, ukucindezelwa, nokumelana namakhemikhali ngaphambi kokuba isuke endaweni yethu. Siphinde sinikeze imibhalo yezobuchwepheshe enemininingwane nokuhlahla umusa wokuhambisana ukuze sisize ithimba lakho lenze izinqumo ezinolwazi, futhi ithimba lethu lokusekela amakhasimende eliphendulayo liyatholakala ukusiza nganoma yimiphi imibuzo mayelana nokukhethwa kwezinto zama-gasket noma imininingwane yomkhiqizo. Noma ngabe udinga i-gasket ye-EPDM ejwayelekile yohlelo lwamanzi, i-gasket ye-FKM esebenza kahle kakhulu yokucubungula amakhemikhali, noma ukunikezwa ngobuningi kwama-gasket e-NBR ezinto zokusebenza ze-hydraulic, iVaricpand inobuchwepheshe, amandla okukhiqiza, nokuzibophezela ekhwalithi ukuhlangabezana nezidingo zakho. Siyakumema ukuthi uhloleIkhaya ikhasi, funda kabanzi nge-Mayelana Nathi, buyekeza uhlu lwethu olugcwele lwe-Imikhiqizo, futhi Xhumana ithimba lethu ukuze sithole isilinganiso esikhethekile nokubonisana nochwepheshe ngezicelo zakho zokuvala.

Ukukhetha impahla efanele ye-gasket kubalulekile ekuvaleni okuthembekile nokuphephile kwezimboni, futhi i-EPDM, i-FKM, ne-NBR zimelela izinketho ezintathu ezibalulekile ze-elastomer ezitholakala konjiniyela nabasebenzi bokuthenga. Ama-gasket e-EPDM anikeza ukumelana okukhethekile namanzi, umusi, i-ozone, kanye nesimo sezulu, okwenza afaneleke kahle ezinhlelweni zamanzi nangaphandle, kuyilapho ama-gasket e-NBR enikeza ukumelana okuhle kakhulu namafutha nophethiloli ngezindleko eziqhudelanayo, futhi ama-gasket e-FKM anikeza amazinga aphezulu kakhulu okumelana nokushisa namakhemikhali ezindaweni zezimboni ezidinga kakhulu. Ngokuhlolisisa ngokucophelela ukuhambisana kwamakhemikhali kwemidiya yakho, izimo zakho zokushisa nokucindezela kokusebenza, kanye nezithiyo zakho zesabelomali, ungakhetha impahla enikeza ukusebenza okuhle kakhulu nempilo yesevisi ende kunazo zonke. Uma ubambisana ne-Varicpand International, uthola ukufinyelela ekusekelweni kobuchwepheshe bezobunjiniyela, amandla okukhiqiza ngokwezifiso, kanye nochungechunge lokuhlinzeka lomhlaba wonke oluzinikele empumelelweni yakho. Xhumana nethimba lethu namuhla ukuze sixoxe ngezidingo zakho ze-gasket futhi uthole ukuthi izixazululo zethu zokuvala ezisezingeni eliphezulu zingathuthukisa kanjani ukuthembeka nokusebenza kahle kwemisebenzi yakho.

Umehluko oyinhloko usezingeni lokumelana namakhemikhali namandla okushisa. I-EPDM ilungele amanzi, umusi, noketshezi lwe-polar kodwa iyehluleka emafutheni nama-hydrocarbon; i-NBR ihamba kahle namafutha amaminerali nophethiloli kodwa iyonakala nge-ozone nezincibilikisi ze-polar; i-FKM inikeza ukumelana okubanzi kakhulu namafutha, uphethiloli, izincibilikisi, nama-asidi, nezinga lokushisa eliphezulu kakhulu lifinyelela ku-200°C. Ukukhetha kwakho kufanele kuqondiswe yizinto ezithile zezimboni ozivala ngazo kanye nezinga lokushisa elisebenzayo lohlelo lwakho.

I-EPDM iyona ekhethwayo uma kukhulunywa ngamanzi ashisayo kanye nokusetshenziswa komhwamuko, ngenxa yokumelana kwayo okuhle kakhulu noketshezi olunamandla kanye nokukwazi ukusebenza kufinyelele ku-150°C. I-FKM empeleni ayisebenzi kahle emanzini ashisayo nasezindaweni ezinomhwamuko oshisayo, kanti i-NBR inokumelana namanzi okumane nje kufanele, ngakho i-EPDM iyona ephumelelayo ngokusobala kulezi zinto ezinamanzi ezimbonini ezinjengokuhlanza amanzi, i-HVAC, kanye nokucubungula ukudla.

Yebo, ama-gasket e-NBR amelana kakhulu nophethiloli, uphethiloli we-diesel, amafutha amaminerali, namafutha okugcoba, okwenza kube yinto ejwayelekile ukukhetha izinhlelo zikaphethiloli namafutha ezisebenza emazingeni okushisa aphakathi afinyelela ku-120°C. Kodwa-ke, kufanele ugweme ukusebenzisa i-NBR ngophethiloli one-aromatics aqukethe amazinga aphezulu e-benzene noma i-toluene, ngoba lokhu kungabangela ukuvuvukala nokonakala, futhi ezimweni ezinjalo i-FKM iyindlela engcono kakhulu.

Ama-gasket e-FKM angasebenza ngokuqhubekayo emazingeni okushisa afinyelela ku-200°C, futhi kungenzeka ukukhuphuka kwesikhashana kuya ku-250°C kuye ngokwakheka okuthile. Lokhu kwenza i-FKM ibe yinto ekhethwayo ezinhlelweni ezisezingeni lokushisa eliphezulu njengezinjini ze-diesel, izinto zokuphendula zamakhemikhali, nemishini yasemkhathini kawoyela lapho ezinye i-elastomers ezifana ne-NBR ne-EPDM zingahluleka ngokushesha ngenxa yokonakala okubangelwa ukushisa.

I-FKM ibiza kakhulu kune-NBR, kodwa izindleko eziphezulu ziyathetheleleka ezinhlelweni ezibandakanya amazinga okushisa aphakeme, amakhemikhali anolaka, noma imiphumela emibi yokwehluleka. Ezindaweni ezinzima, isikhathi sokusebenza eside se-FKM nokwethembeka kwayo okuphezulu kunciphisa isikhathi sokuma komsebenzi nezindleko zokulungisa, okuholela ezindlekweni ezinhle zokuphelele kokunikwa ngaphandle kokukhathalela intengo yokuqala ephezulu yezinto.

Cha, ama-gasket e-EPDM awafaneleki ukusetshenziswa namafutha amaminerali, uphethiloli, noma imikhiqizo esuselwa kaphethiloli, ngoba lawa ma-hydrocarbon abangela ukuvuvukala okusheshayo, ukuthamba, nokonakala kwe-polymer ye-EPDM. Uma uvala amafutha noma uphethiloli, kufanele ukhethe i-NBR noma i-FKM esikhundleni, kuye ngezidingo zokushisa namakhemikhali zohlelo lwakho.

Kufanele ucabangele ukwakheka kwamakhemikhali emidiya noma noma yikuphi ukungcola, ububanzi bezinga lokushisa lokusebenza kuhlanganise nokwehla nokukhuphuka okuphezulu, ingcindezi yesistimu, umjikelezo womsebenzi kanye nokushintshashintsha kokushisa, ukuchayeka kwemvelo ku-ozone nemisebe ye-UV, kanye nanoma yiziphi izidingo zokuthobela imithetho. Ukufanisa lezi zici namandla e-EPDM, FKM, ne-NBR usebenzisa ishadi lokuhambisana kuzokuqondisa ekukhetheni impahla engcono kakhulu.

I-Varicpand International inikeza ubuchwepheshe obubanzi bokukhiqiza, ukulawulwa kwekhwalithi okuqinile, kanye nezixazululo zamagasket ezenziwe ngokwezidingo zakho ezithile zokusebenza nezimo zokusebenza. I-supply chain yethu yomhlaba wonke iqinisekisa ukulethwa okuthembekile, futhi ithimba lethu lobunjiniyela linikeza isiqondiso sochwepheshe ekukhetheni izinto zokwakha nasekuklanyweni kwegasket, okusenza sibe uzakwethu othembekile ezimbonini zomhlaba wonke ezifuna izixazululo zokuvala eziqinile nezithembekile.

Yebo, i-Varicpand ikhiqiza amagasket ngobuningi bosayizi, imisebenzi, nokucushwa okungokwezifiso kusetshenziswa izinto ze-EPDM, FKM, ne-NBR. Indawo yethu yokukhiqiza ihlonyiswe ngokubumba nokusika okunembile, futhi ithimba lethu lisebenza eduze namakhasimende ukuletha amagasket ahlangabezana nezidingo ezinembile zobukhulu nezidingo zokusebenza.

Ezinhlelweni ze-hydraulic ezinomfutho ophezulu, kufanele uqale ukubona ukuthi uketshezi lwe-hydraulic lusekelwe kuphethiloli noma lusekelwe ku-phosphate ester, ngoba lokhu kunquma ukuthi i-NBR noma i-EPDM ifanelekile. Izinga lokushisa nokucindezela kokusebenza kufanele bese kuhlolwe ndawonye, futhi ezinhlelweni ezingaphezu kuka-120°C noma ezibandakanya uketshezi olunamandla, ama-gasket e-FKM ngokuvamile ayinketho ethembekile kakhulu ukuze kugcinwe ukuqina kokuvala ngaphansi kwengcindezi ehlanganisiwe.