Ukukhetha impahla efanele yegasket kungenye yezinqumo ezibaluleke kakhulu ekuvaleni kwezimboni, kodwa ngokuvamile ayinakwa kuze kube yilapho kugqekezeka. Ukukhetha phakathi kwe-EPDM, FKM, ne-NBR kunganquma ukuthi imishini yakho isebenza kahle iminyaka eminingi noma yehluleke kabi phakathi namasonto ambalwa. Uketshezi ngalunye, izinga lokushisa, izinga lokucindezela, kanye nezimo zemvelo kubeka izidingo ezihlukile phezu kwento yokuvala. Igasket engafanele ingavuvukala, iqine, iqhekeke, noma ilahlekelwe ukucindezela, okuholela ekulahlekelweni kwesikhathi okubizayo nezingozi eziyingozi zokuphepha. Lo mhlahlandlela ophelele we-Varicpand International uhlukanisa umehluko phakathi kwezinto ezintathu ezivame kakhulu zamagasket enjoloba futhi uchaza kahle ukuthi ungazifanisa kanjani nezinto zakho zezimboni. Ekugcineni, uzoba nohlaka olucacile nolusebenzisekayo lokukhetha igasket efanele kuso sonke isicelo esikhungweni sakho.

Izigxivizo zegasket zinquma ukuthi uhlelo lwakho lokuvimba lusabela kanjani kumithombo yokusebenza namakhemikhali okuhlanza okuhlangana nazo nsuku zonke. Yonke i-elastomer inesakhiwo samakhemikhali esiyingqayizivele esinquma ukumelana kwayo namafutha, ama-asidi, umusi, ama-solvent, nolunye uketshezi lwezimboni. Amazinga okushisa aqhubekayo naphakeme nawo adlala indima enkulu, ngoba ezinye izinhlanganisela zihlala ngokushesha uma zivezwa ekushiseni okungaphezu kwemikhawulo yazo elinganiselwe. Izimo zokucindezela ne-vacuum zivivinya ubuqotho bemishini ye-gasket, kuyilapho izinhlelo zokusebenza zokuvimba ezimile noma eziguqukayo zibeka izimo ezihlukene zokucindezela entweni. I-Ozone, isimo sezulu, nokuchayeka ku-UV kungabangela ukuguga ngaphambi kwesikhathi ezinhlanganisweni ezingakhethwe kahle, ikakhulukazi ekufakweni kwangaphandle. Uma kusetshenziswa into engahambelani, ungase ubone ukuvuvukala, ukufinyela, ukuqina, ukuqhekeka, noma ukulahlekelwa kokucindezela, konke lokhu ekugcineni kuholela ekuvuzeni nasekwehlulekeni kwemishini. Yingakho ithimba lobunjiniyela e-Mayelana Nathi igcizelela ukukhetha into efanele njengesisekelo sayo yonke iphrojekthi yokuvala ephumelelayo.

Ngaphezu kwengozi esobala yokuvuza, ukukhetha okungalungile kwegasket kudala uchungechunge lwezinkinga zokusebenza ezithinta umkhiqizo nokuphepha. I-gasket evuvukele ingacindezela ingene ngaphakathi kwepayipi, ivimbele ukugeleza futhi ikhulise ukwehla kwengcindezi ohlelweni lonke. Amagasket aqinile alahlekelwa amandla awo okuhambisana nokungalingani kobuso be-flange, okuholela ekucindezelweni okungalingani nokwehluleka ngaphambi kwesikhathi. Ezinhlelweni zokudla nezemithi, ukuwohloka kwempahla kungangcolisa umkhiqizo futhi kubangele ukwephulwa kwemithethonqubo. Amathimba okunakekela avame ukuchitha amahora amaningi efuna ukulungisa ukuvuza okuphindelelayo okubangelwa ukukhetha okungalungile kwempahla. Ukuqonda ukusebenzisana phakathi kwamakhemikhali e-elastomer nendlela yokusebenza akusikho nje ubuchwephesha—kuyinto ebalulekile ebhizinisini. Onjiniyela bakwa-Varicpand basebenza eduze namakhasimende ukuze bahlaziye izimo zabo zokusebenza futhi batuswe ngegasket ekahle ngaphambi kokuba izinkinga zenzeke.

EPDM (Ethylene Propylene Diene Monomer) iyinto ehamba phambili emanzini, umusi, i-glycol, uketshezi lwamabhuleki, kanye nezinhlelo zangaphandle ngenxa yokumelana kwayo okumangalisayo nesimo sezulu, i-ozone, kanye nemisebe ye-UV. Inikeza ukumelana nokushisa okuhle kakhulu kufika cishe ku-150°C ekusebenzeni okuqhubekayo futhi isebenza kahle kakhulu ezindaweni ezinamazinga okushisa aphansi kufika ku--50°C. Nokho, i-EPDM ayihambisani kahle nemikhiqizo kaphethiloli, amafutha amaminerali, kanye namafutha e-hydrocarbon, okunciphisa kakhulu ukusetshenziswa kwayo ezinhlelweni zikawoyela negesi. I-FKM (Fluoroelastomer), evame ukwaziwa ngamagama okuhweba afana ne-Viton, inikeza ukusebenza okukhethekile emazingeni okushisa aphezulu, amakhemikhali anamandla, amafutha, kanye namafutha amaminerali. Ingamelana namazinga okushisa okuqhubekayo angu-200°C futhi inikeza ukumelana okuhle kakhulu ne-ozone, umoya-mpilo, kanye nesimo sezulu. Ububi obukhulu be-FKM ukuthi ibiza kakhulu uma iqhathaniswa namanye ama-elastomer, nakuba ukuqina kwayo kuvame ukuthethelela ukutshalwa kwezimali. I-NBR (Nitrile Butadiene Rubber), noma i-nitrile, iyisinqumo esongayo ezinhlelweni ezibandakanya amafutha amaminerali, amafutha okugcoba, uketshezi lwe-hydraulic, kanye namazinga okushisa aphakathi. Inikeza izakhiwo ezinhle zomshini, ukumelana nokugqokwa okuhle kakhulu, kanye nokusebenza okuthembekile kokuvala ezindaweni ezijwayelekile zezimboni. Ezinye izinto ezifana ne-silicone, i-PTFE, ne-FFKM nazo ziyatholakala ezinhlelweni ezikhethekile, futhi ezethuImikhiqizo ikhasi lihlanganisa uhla olugcwele lwezixazululo zokuvala.

Uma kuqhathaniswa lezi zinto ezintathu eziyisisekelo, kusiza ukucabanga ngendlela yokuthatha isinqumo elula esekelwe ohlotsheni lwakho olukhulu lwe-media. Uma inqubo yakho ihilela amanzi, umusi, noma ukuchayeka ngaphandle, i-EPDM icishe ibe yisinqumo esifanele ngaso sonke isikhathi ngenxa yokuqina kwayo okukhethekile kwemvelo. Uma usebenzisa uphethiloli, amafutha, ama-solvent, noma amakhemikhali anamandla emazingeni okushisa aphakeme, i-FKM inikeza ukusebenza okuthembekile kwesikhathi eside. Uma isicelo sakho sihilela amafutha amaminerali namafutha okugcoba emazingeni okushisa aphakathi futhi udinga isixazululo esingabizi, i-NBR iyithuluzi elisebenzayo. Imisebenzi eminingi yezimboni empeleni isebenzisa yonke le mithathu ezindaweni ezahlukene zesakhiwo esisodwa, futhi lokho kujwayelekile futhi kulindelekile. Okubalulekile ukufanisa i-gasket ngayinye ne-media ethile nezimo ezohlangana nazo. I-Varicpand igcina izimpahla eziningi zamashidi e-EPDM, FKM, ne-NBR ezigabeni eziningi zokuqina, ngakho singakwazi ukuhlangabezana nanoma yisiphi isidingo sezimboni.

Amagasket e-EPDM avela ku-Varicpand afanelekelwe izitshalo zokuhlanza amanzi, amapayipi omusi, izindawo ezingaphandle, kanye nezinhlelo lapho ukumelana nesimo sezulu kubalulekile khona. Amakhompawundi ethu e-EPDM anikeza ukusebenza okungaguquki kokuvala ezinhlelweni zamanzi ashisayo afinyelela ku-150°C futhi amelana nemiphumela elimazayo yelanga ne-ozone iminyaka eminingi yokusebenza. Sigcina amashidi erabha e-EPDM ngamazinga obulukhuni asukela ku-soft 50 Shore A kuya ku-firm 80 Shore A, okuqinisekisa ukuthi singakwazi ukufanisa izidingo ezithile zokucindezela zedizayini yakho ye-flange. Amagasket e-FKM akhathalogi yethu aklanyelwe ukucubungula amakhemikhali, imisebenzi kawoyela negesi, kanye nezindawo ezinokushisa okuphezulu lapho izinto ezingezinhle zingonakala khona ngokushesha. Amakhowudi ethu e-FKM atholakala kumazinga ajwayelekile kanye nasezinhlotsheni ezikhethekile ezinikeza ukumelana namakhemikhali okuthuthukisiwe ezinhlelweni ezinzima. Amagasket e-NBR avela ku-Varicpand ayisisekelo ezinhlelweni ze-hydraulic, imishini yokuthutha uphethiloli, kanye nemishini ejwayelekile lapho ukumelana namafutha ezimbiwa phansi kubalulekile ngentengo efinyelelekayo. Zonke izinto zingasikwa ngokunemba zibe izimo ezingokwezifiso, amagasket obuso obugcwele, amagasket e-spiral wound, kanye nezingxenye ze-die-cut ezilungiselelwe izimfuno zakho ezithile.

Okwehlukanisa iVaricpand ukuzibophezela kwethu ekulawuleni ikhwalithi nokulandeleka kwenqubo yonke yokukhiqiza. Iqembu ngalinye lezinto zokugquma livivinywa ukuqina, amandla okudonsa, ukunwebeka, nokucindezelwa ngaphambi kokuba likhishwe ukuze lisikwe. Sihlinzeka ngezitifiketi zezinto ezibonakalayo ngalo lonke uhlelo lokuthenga, sibhala phansi ukwakheka okuthile kwenhlanganisela nezici zokusebenza zamagasket akho. Imishini yethu yokusika enembile iqinisekisa ukunemba kobukhulu ngaphakathi kwemingcele eqinile, iqede izinkinga zokufaka ezibangelwa amagasket amancane noma amakhulu ngokweqile. Noma ngabe udinga i-prototype eyodwa noma izinkulungwane zamagasket okukhiqiza, indlela yethu eguquguqukayo yokukhiqiza ingahlangabezana nezidingo zakho. Izitifiketi zokuthobela imithetho zomhlaba wonke zenkampani ziqinisekisa ukuthi amagasket ethu ahlangabezana namazinga omhlaba wonke okusebenza kwezimboni zokuvala.

Ukuqonda ukuhambisana kwamakhemikhali kubalulekile ukuvimbela izindlela ezine ezivame kakhulu zokwehluleka: ukuvuvukala, ukufinyela, ukuthamba, nokuqina. Uma i-gasket material imunca uketshezi, iyavuvukala, okushintsha ubukhulu be-seal futhi kungabangela ukukhishwa noma ukulahlekelwa kwe-bolt preload. Ukufinyela kwenzeka lapho ama-plasticizers ekhishwa ku-elastomer ngama-solvents anamandla, okwenza i-gasket ibe brittle futhi ithambekele ekuqhekekeni. Ukuthamba kwenza buthaka ikhono lezinto lokugcina amandla okucindezela, kuyilapho ukuqina kubhubhisa ubhedu lwayo nokukwazi ukuhambisana nezindawo ze-flange. Ireferensi elula engezansi inikeza indawo yokuqala yokukhetha izinto ngokusekelwe kumidiya omkhulu ohlelweni lwakho. Amafutha amaminerali kufanele avalwe nge-NBR noma i-FKM, kuyilapho uphethiloli namanye ama-hydrocarbons edinga i-FKM ukuze kusebenze ngokuthembekile. Amanzi nezixazululo ze-glycol ziphathwa kahle kakhulu yi-EPDM, futhi izinhlelo ze-steam zifaneleka ngokwemvelo ekumelaneni kwe-EPDM nokushisa nomswakama. Ukufakwa kwangaphandle kuzuza ekusebenzeni okuhle kwe-EPDM ekumelaneni nesimo sezulu, nakuba i-FKM nayo yamukelekile uma kudingeka ukumelana nokushisa okuphezulu. Amakhemikhali anamandla, ama-acids, nama-solvents adinga ukumelana namakhemikhali okuphezulu kwe-FKM ukuze kuvinjelwe ukuwohloka okusheshayo.

Kubalulekile ukukhumbula ukuthi izinto zokucubungula zangempela emhlabeni wangempela azivamisile ukuba amakhemikhali ahlanzekile anengxenye eyodwa, futhi izithasiselo zingashintsha kakhulu isimo sokuhambisana. Ama-inhibitors, ama-anti-scalants, ama-biocides, nama-surfactants ezinhlelweni zamanzi angahlasela izinto zama-gasket noma ngabe uketshezi oluyisisekelo alunabungozi. Amafutha avame ukuqukatha ama-oxygenates, i-ethanol, nezinye izithasiselo ezikhulisa ubudlova baphakathi nendawo kuma-elastomers. Ukumelana nezinga lokushisa namakhemikhali kuhlobene ngokujulile, ngoba ukukhuphuka kwezinga lokushisa ngokuvamile kusheshisa ukuhlaselwa kwamakhemikhali esakhiweni se-polymer. I-gasket esebenza kahle ku-50°C ingase yehluleke ngokushesha ku-100°C endaweni efanayo yamakhemikhali ngenxa yokushesha kokubola kwe-degradation kinetics. Hlala uqinisekisa ukuhambisana usebenzisa izinhlobo zangempela zoketshezi futhi ubheke amashadi okuhambisana ashicilelwe ahlanganisa imiphumela yezinga lokushisa nokugxila. Ithimba lobunjiniyela lika-Varicpand lingasiza ekuhloleni ukuhambisana futhi linikeze izincomo ezisekelwe ebufakazini zohlelo lwakho oluthile loketshezi.

Izimo zokusebenza zibeka imikhawulo ekukhetheni kwegasket okudlula kakhulu ukuhambelana nje kwezinto ezithile, futhi isimo ngasinye kufanele sihlolwe ngokuhlangana nezinye. Emazingeni okushisa aphansi, i-EPDM ne-FKM zigcina ukuguquguquka kwazo namandla okuvala kuze kufike ezingeni lokushisa eliphansi kakhulu, kuyilapho i-NBR iqina kakhulu futhi ingase ilahlekelwe amandla okuhambisana nobuso be-flange. Ukusebenza emazingeni okushisa aphezulu yilapho i-FKM ikhanya khona ngempela, ibhekana nokuchayeka okuqhubekayo kuze kufike ku-200°C, kuyilapho i-EPDM ilinganiselwe ku-150°C futhi i-NBR ngokuvamile iyona kakhulu ngaphezu kuka-100°C. Izilinganiso zomfutho zincike ekuqineni nasekujuleni kwegasket, lapho izinto eziqinile zihlinzeka ukumelana okungcono nokuqhuma nokukhishwa ngaphansi kwemfutho ephezulu yohlelo. Izinhlelo eziguquguqukayo ezifana namaphampu aphindaphindayo nezingodo ezijikelezayo zidinga ama-gasket anokumelana nokugqokwa okuhle kanye nama-coefficient aphansi okungqubuzana. Ukusebenza kwe-vacuum kwethula ukukhathazeka okwengeziwe mayelana nokukhishwa kwegesi nokungena, ngoba izinto eziguquguqukayo ku-elastomer zingahwamuka futhi zingcolise indawo ye-vacuum. Ngasinye salezi zici kufanele sicatshangelwe ngokucophelela, ngoba ukuthuthukisa isimo esisodwa kungase kuyekelele ukusebenza kwesinye.

Ukusebenzisana phakathi kwezinga lokushisa nokucindezela kubaluleke kakhulu ezinhlelweni zokuvala izimboni, ngoba zombili lezi zici zinomthelela ekucindezelekeni kwemishini kugasket. Uhlelo olunokucindezela okuphezulu olusebenza eduze kwezinga lokushisa eliphezulu lezinto ezisetshenziswayo ludinga kakhulu kunoma yisiphi isimo sodwa. Ukwakheka kwe-flange, umthwalo we-bolt, nokuphelela kwendawo nakho kusebenzisana nezinto ze-gasket futhi kungathinta kakhulu ukusebenza kokuvala. Ukushintshashintsha kwezinga lokushisa kubangela ukunwetshwa okuhlukile phakathi kwe-flange ne-gasket, okungaholela ekulahlekelweni kokucindezelwa nokuvuza ngokuhamba kwesikhathi. Ukuhlaselwa ngamakhemikhali kuyashesha emazingeni okushisa aphezulu, ngakho isikhathi sokusebenza se-elastomer kumkhakha othile sifushane emazingeni okushisa aphezulu. Onjiniyela kufanele bahlale becabangela inhlanganisela emibi kakhulu yezimo zokusebenza kunokuba baklamele ukusebenza okuvamile noma okuphakathi. Sisebenza namakhasimende ukuze sihlole yonke imikhawulo yezimo zokusebenza zawo lapho senza izincomo ngezinto ze-gasket.

Ukuqina kwegasket kulinganiswa ngesilinganiso se-Shore A durometer futhi kuthinta ngqo indlela i-seal eziphatha ngayo ngaphansi kwengcindezi nokucindezela. Amagasket athambile asesilinganisweni se-50-60 Shore A ayakwazi ukuzivumelanisa kahle futhi afanele ukuvala ngengcindezi ephansi lapho ubuso be-flange bungase bungaphelele. Ukuqina okujwayelekile kwe-70-75 Shore A kunikeza ibhalansi engcono kakhulu yokuzivumelanisa namandla ezinhlelweni eziningi zezimboni. Izinto eziqinile ezisesilinganisweni se-80-90 Shore A zinikeza ukumelana okuphezulu nokukhishwa ngaphandle futhi ziyanconywa ezinhlelweni ezinengcindezi ephezulu ezinama-flange avaleke kahle. Kodwa-ke, ukuqina kukodwa akunqumi ukusebenza—ukwakheka okuphelele kwento, okuhlanganisa ama-fillers, ama-plasticizers, ama-curatives, nezinsiza zokucubungula, kudlala indima ebalulekile ngokulinganayo. Into ehlanganiswe ngokucophelela inganikeza ukusebenza kokuvula okuhle ekuqineni okuthile, kuyilapho into engaklanywanga kahle izohluleka noma ngabe isilinganiso se-durometer sithini.

Ukwakheka kwe-compound yilapho ikhwalithi ye-gasket ihlukaniswa ngempela, njengoba umehluko omncane ekwakhiweni kwe-polymer ukhiqiza umehluko omkhulu ekusebenzeni kwangempela. Ama-fillers afana ne-carbon black athuthukisa amandla okudonsa nokumelana nokugqokwa, kuyilapho ama-plasticizers ethuthukisa ukuguquguquka emazingeni okushisa aphansi kodwa angakhishwa amakhemikhali athile. Uhlelo lokwelapha lunquma ubuningi bokuxhumana kwenethiwekhi ye-polymer, olulawula ukumelana nokushisa nokuziphatha kokucindezelwa. Ama-antioxidants nama-antiozonants avikela into ngesikhathi sokusebenza, enweba impilo yokusebenza ye-gasket ezindaweni ezinzima. Kubalulekile ukuqonda ukuthi umbala akulona ucwaningo lwezinto—imibala efanayo ingamele ama-compound ahluke ngokuphelele anamazinga okusebenza ahluke kakhulu. Hlala ucacisa ama-gaskets ngekhodi ye-compound nesitifiketi sezinto esikhundleni sokuthembela ekubukeni. I-Varicpand ihlinzeka ngamashidi emininingwane ye-compound anemininingwane ngalo lonke uhlelo lwe-gasket ukuze uhlale wazi kahle ukuthi yini oyifakayo.

Ukukhetha impahla efanele yegasket kulandela inqubo ehlelekile eqala ngokuqonda okuphelele kwezidingo zokusebenza kwakho. Isinyathelo sokuqala ukuhlonza wonke amafluids azothintana negasket, okuhlanganisa izinto eziyinhloko zokucubungula, izinto zokuhlanza, nanoma yimaphi amafluids asetshenziswa ngesikhathi sokulungisa. Okulandelayo, chaza ububanzi obugcwele bezinga lokushisa, okuhlanganisa amazinga okushisa aphansi, ajwayelekile, naphakeme kakhulu okuzobhekana nawo igasket. Isinyathelo sesithathu sidinga ukuthi uchaze izimo zomfutho, okuhlanganisa umfutho omkhulu wesistimu, amazinga evacuum, nanoma yikuphi ukushintshashintsha komfutho okuzokwenzeka. Isinyathelo sesine ukukhetha izinto ezingaba khona ngokusekelwe kudatha yokuhambisana oyiqoqile, njengokukhetha i-EPDM yezinhlelo zamanzi noma i-FKM yezinsiza zamakhemikhali ezinamandla. Esinyathelweni sesihlanu, ukhetha inhlanganisela ethile kanye nezinga lokuqina ngokusekelwe ezidingweni zemishini kanye nokuhambisana okuqinisekisiwe nezinto zakho zangempela. Ekugcineni, qinisekisa ukukhetha kwakho ngezibalo ezifanele zokuklama kwegasket futhi, lapho kungenzeka, ngokuhlola ngaphansi kwezimo zangempela zokusebenza.

Ukulandela le ndlela ehlelekile kuvimbela amaphutha abizayo enzeka lapho onjiniyela bencika ekucabangeni noma kokuhlangenwe nakho kwangaphambilini ngezinhlelo ezihlukene. Akujwayelekile ukuthi izinhlelo ezimbili ezibukeka zifana zidinge izinto ezihlukene zama-gasket ngenxa yomehluko omncane ekwakhekeni kwemidiya noma ezimweni zokusebenza. Inqubo yokukhetha kufanele futhi icabangele imiphumela yokwehluleka, ngoba ukuvuza emgqeni wamakhemikhali anobuthi kubucayi kakhulu kunokuvuza ohlelweni lokupholisa ngamanzi. Izinhlelo ezibalulekile ezidinga ukwethembeka okuphezulu zingagcina zifaneleka ngezindleko ezengeziwe zezinto ezisezingeni eliphezulu ezifana ne-FKM noma ngisho ne-FFKM naphezu kokutshalwa kwezimali okuphezulu ekuqaleni. I-Varicpand inikeza izinsiza zokwenza amaphrothothayiphu ngokushesha ukuze ukwazi ukuqinisekisa ukukhetha kwakho kwe-gasket ngaphambi kokuzibophezela emananini okukhiqiza aphelele. Ithimba lethu lobunjiniyela linganikeza isiqondiso nezincomo zezinto ezisuselwa eminyakeni eminingi yokuhlangenwe nakho ezimbonini ezahlukahlukene.

Izimboni ezahlukene zethula izinselelo ezihlukile zokuvala, futhi ukufanisa impahla ye-gasket nomsebenziso kubalulekile ukuze kube nokusebenza okuthembekile kwesikhathi eside. Izikhungo zokuhlanza amanzi zithembele kakhulu kuma-EPDM gaskets ngenxa yokumelana kwawo okukhethekile ne-chlorine, i-ozone, nezindawo ezinamanzi emazingeni okushisa aphakathi. Izimboni zokucwenga uwoyela ziphendukela ku-FKM kuma-gaskets okufanele amelane nama-hydrocarbon, amakhemikhali anamandla, kanye namazinga okushisa aphakeme avamile emisebenzini yokucubungula. Imishini ye-hydraulic nezinye izinto zokusebenza ezisebenzisa uketshezi olususelwa kumaminerali ngokuvamile icacisa ama-NBR gaskets ngenxa yokumelana kwawo okuhle kakhulu nowoyela kanye nezindleko ezingabizi. Amapayipi omusi ekukhiqizeni amandla nasezimbonini zokucubungula azuzisa ukumelana nokushisa nokufuma okuhle kakhulu kwe-EPDM emsebenzini oqhubekayo. Amathangi okugcina amakhemikhali aqukethe ama-acid anamandla, ama-solvents, noma okunye uketshezi olusebenzayo adinga ama-FKM gaskets ukuvimbela ukucekelwa phansi okusheshayo kwempahla. Izindawo zangaphandle nemishini echayeke ezintweni zemvelo zisizwa kakhulu ukumelana kwe-EPDM okuhle kakhulu nesimo sezulu kanye ne-UV. Izinhlelo zokuphatha uphethiloli kwezokuthutha nasezindaweni zokugcina zidinga i-FKM ukuze kube nokumelana okuthembekile ne-petroli, i-diesel, namafutha ezindiza.

Uhlelo ngalunye lulethela iqoqo lalo lezidingo zokulawula nokuthobela imithetho ezonquma ukukhethwa kwezinto zokwakha. Izinhlelo zokucubungula ukudla nezamuthi zidinga izinto zama-gasket ezivunyelwe yi-FDA futhi ezimelana nokuhlanzwa njalo ngezinto ezinamandla ezihlanza nokubulala amagciwane. Izinhlelo zamanzi okuphuza kufanele zisebenzise izinto zama-gasket eziqinisekisiwe ukuthi zingathintana namanzi ahlanzekile ngaphansi kwezindinganiso ezifanele. Izikhungo zikawoyela negesi ezisemanzini zidinga ama-gasket angamelana nosawoti, ama-hydrocarbon, nokushintshashintsha okukhulu kwezinga lokushisa kanyekanye. Umkhakha wezindiza ngezikhathi ezithile udinga izinto zama-gasket ezinemininingwane ebhaliwe yokusebenza kuzinga elibanzi lokushisa nokuchayeka kumakhemikhali. Ngokuqonda lezi zidingo eziqondene nohlelo ngalunye, i-Varicpand isiza amakhasimende ukuba akhethe izinto ezihlangabezana nazo zombili izidingo zobuchwepheshe nezokulawula. Sigcina nemibhalo esekela ukuthobela izindinganiso zamazwe ngamazwe kumakhasimende ethu ezimbonini ezilawulwayo.

Izinkinga eziningi zama-gasket ezitholakala ukuthi "zibangelwa izinto ezimbi" empeleni ziwumphumela wamaphutha okukhetha ahlelekile obekungagwenywa ngokuhlaziya okufanele. Ukukhetha ama-gasket ngombala esikhundleni sekhodi yezinto kuyiphutha elivame kakhulu neliyingozi, ngoba umbala awunikezi lwazi olunengqondo mayelana nezakhiwo zokwakheka. Ukugxila kuphela ezingeni lokushisa eliphakeme kuyilapho kunganakwa izinga lokushisa eliqhubekayo lokusebenza kungaholela ekugugeni ngaphambi kwesikhathi nasekwehlulekeni ezimweni zokushisa eziphakathi nendawo. Ukunganaki izinto zokuhlanza nezinye izinto ezingezona eziyinhloko kungenye indlela yokunganaki evamile, ngoba ama-gasket avame ukwehluleka ngenxa yokuchayeka kumakhemikhali okuhlanza atholakala kuphela ngesikhathi sokulungisa. Ukucabanga ukuthi wonke ama-FKM noma ama-NBR ayafana akunaki ukwehluka okukhulu ekwakhekeni ngisho naphakathi komndeni ofanayo we-polymer. Ukusebenzisa ubulukhuni esikhundleni somklamo ofanele we-groove kungadala izinkinga, ngoba ukulungiswa kobulukhuni akukwazi ukunxephezela ubuthakathaka obuyisisekelo bomklamo. Ukushintsha ama-seal ngaphandle kokuthola imbangela yangempela yokwehluleka kumane nje kuphinda umjikelezo futhi kuqinisekisa umphumela ofanayo.

Amaphimpi aphumelelayo kakhulu ayazi ukuthi ukwehluleka kwama-gasket kuyidatha ebalulekile yokuxilonga, hhayi nje izinkinga okumelwe zixazululwe. Uma i-gasket yehluleka, yihlole ngokucophelela ukuze ubone indlela yokwehluleka futhi uyihlobanise nezimo zokusetshenziswa. Ukuvuvukala kwe-gasket kukhombisa ukungahambelani kwamakhemikhali, kuyilapho ukuqina ngokuvamile kukhombisa ukuguga ngenxa yokushisa noma ukukhishwa kwe-plasticizer. Ukuqhekeka ezindaweni ezigcwele ingcindezi kungakhombisa umthwalo we-bolt owedlulele noma i-gasket eyakhelwe kancane kakhulu kulokho okusetshenziswayo. Impahla ye-gasket ekhishwe emgogodleni we-flange ikhombisa ukuthi ubulukhuni buncane kakhulu kwingcindezi yesistimu. Ukubhala phansi lokhu okubonwayo nokwabelana ngakho nomthengisi wakho we-gasket kungaholela ezincomweni ezingcono kakhulu zezinto ezisetshenziswayo esikhathini esizayo. I-Varicpand ikhuthaza amakhasimende ukuthi ahlanganyele nethimba lethu lobunjiniyela ukuze lihlaziye ukwehluleka futhi linikeze izincomo zezinto ezisetshenziswayo ngokusekelwe kudatha yangempela yokusebenza.

Ayikho into eyodwa "engcono kakhulu" yezinto zokugquma, ngoba ukukhetha okufanele kuncike ngokuphelele kumidiya yakho ethile, izinga lokushisa, ingcindezi, nendawo yokusebenza. Ama-EPDM gaskets afanelekile emanzini, umhwamuko, nasezindaweni zangaphandle lapho ukumelana nesimo sezulu kubalulekile. Ama-FKM gaskets ahlinzeka ngokusebenza okuhle kakhulu kwamakhemikhali nokushisa okuphezulu emsebenzini wezimboni odingekayo. Ama-NBR gaskets anikeza isixazululo esingabizi kakhulu samafutha amaminerali namafutha okugcoba emazingeni okushisa aphakathi. Ukukhetha okufanele kwendawo yakho kudinga ukuhlaziywa ngokucophelela kwezimo zonke zokusebenza kanye nolwazi lukanjiniyela wokuvala oqeqeshiwe.

Ngokuvamile, cha—i-EPDM ayihambisani kahle nemikhiqizo esekelwe kuphethiloli, amafutha amaminerali, kanye namafutha e-hydrocarbon. Ukuchayeka kulawa makhemikhali kubangela ukuthi i-EPDM ivuvukale futhi ithambe, okuholela ekulahlekelweni ngokushesha kwekhono lokuvimba nokwehluleka ngaphambi kwesikhathi. Uma isicelo sakho sibandakanya amafutha, kufanele ukhethe i-NBR ukuze uthole ukumelana namafutha okonga imali, noma i-FKM uma kukhona amazinga okushisa aphezulu nezimo ezidinga kakhulu. Emsebenzini wamafutha, qinisekisa uhlobo oluthile lwamafutha nezithasiselo ezikhona ohlelweni lwakho ngaphambi kokwenza isinqumo sokugcina sokukhetha impahla yegasket. Hlala ubonisana ishadi lokuhambisana noma umthengisi wakho wamagasket ukuze uqinisekise ukufaneleka kokwakheka kwakho okunembile koketshezi.

Amanye amagredi e-FKM angakwazi ukubhekana nokuchayeka kumhwamuko (steam) okulinganiselwe, kodwa ngokuvamile awasona isinqumo esikhethwayo ekusetshenzisweni okuqhubekayo komhwamuko. I-EPDM ngokuvamile iyinto engcono kakhulu ezinhlelweni zomhwamuko ngenxa yokumelana kwayo okuhle kakhulu namanzi ashisayo nomhwamuko kufika ku-150°C. I-FKM ingakwazi ukumelana nokuchayeka komhwamuko ngezikhathi ezithile ezinhlelweni ezikhethekile, kodwa kufanele uqinisekise ukumelana nomhwamuko kwenhlanganisela ethile ngaphambi kokuyicacisa. Emsebenzini odingekayo womhwamuko ongaphezu kuka-150°C, kungadingeka ucabangele izinto ezithuthukisiwe njenge-silicone noma ama-elastomer akhethekile asezingeni eliphezulu lokushisa. Hlala uhlola kokubili izinga lokushisa nokucindezela lapho ukhetha ama-gasket ezinhlelweni zomhwamuko, ngoba inhlanganisela yazo idinga kakhulu kunaleso simo ngasinye sodwa.

Ukuqina okuvamile kakhulu okusetshenziselwa izinto eziningi ngu-70 Shore A, okunikeza ibhalansi enhle yokuvumelana, amandla, nokusebenza kokuvala kwezinhlelo eziningi. Uma uvala izinhlelo ezinomfutho ophansi ezinobuso be-flange obungaphelele, i-gasket ethambile engu-50-60 Shore A inikeza ukuvumelana nokuvala okungcono lapho kukhona imithwalo ephansi yamabhawodi. Ezinhlelweni ezinomfutho ophezulu nasezinhlelweni lapho ukukhishwa kuyinkinga, cabanga ngezinto eziqinile ezingxenyeni zika-80-90 Shore A. Ukukhetha kwakho kumele futhi kubheke ukwakheka kwe-groove, umthwalo wamabhawodi, kanye nezinto ze-flange ohlelweni lwakho oluthile. I-Varicpand ingancoma ukuqina okufanele ngokusekelwe kumfutho wohlelo lwakho nokwakheka kwe-flange.

Yebo, i-Varicpand ihlinzeka ngezixazululo ezigcwele zama-gasket ezenziwe ngokwezifiso kufaka phakathi ukusika ngokunemba, ukusika nge-die, kanye nezinsizakalo zokubumba. Singakwazi ukukhiqiza ama-gasket nge-EPDM, FKM, NBR, nezinye izinto eziningi ngobukhulu nemininingwane yakho ngqo. Ithimba lethu lobunjiniyela lisebenza nawe ukukhetha into efanele, ubulukhuni, kanye nomklamo wohlelo lwakho oluthile. Sikunikeza nezinsizakalo zokwenza amaphrothothayiphu ngokushesha ukuze ukwazi ukuqinisekisa umklamo wakho we-gasket ngaphambi kokuthi uqale ukukhiqiza ngobuningi. Xhumana nethimba lethu elinolwazi nge-Xhumana nathi ikhasi ukuze sixoxe ngezidingo zakho zama-gasket ezenziwe ngokwezifiso.

Isinqumo phakathi kwalezi zinto ezintathu siqala ngokuhlonza uketshezi oluzothintana ne-gasket kanye nobubanzi bezinga lokushisa. Uma i-media yakho ingamanzi, isitimu, noma ingaphandle, i-EPDM iyona khetho ecacile ezimweni eziningi. Uma uphethe amafutha, uwoyela, noma amakhemikhali anamandla emazingeni okushisa aphezulu, i-FKM inikeza ukwethembeka okungcono kakhulu nempilo yesevisi. Ngamafutha amaminerali namagrisi emazingeni okushisa aphakathi nendawo ngenkathi kunezinkinga zesabelomali, i-NBR inikeza ukusebenza okonga futhi okuthembekile. Hlanganisa ukuhlaziywa kwakho kwe-media nedatha yokushisa nokucindezela ukuze ufinyelele ekukhetheni okulungile. Uma ungaqiniseki, bheka amashadi okuhambisana nezinto ze-gasket futhi ubandakanye umhlinzeki wakho wokuvala esinqumweni.

Ukwehluleka kwamagasket ngokuvamile kubangelwa ukungahambisani namakhemikhali, ukushisa okweqile, ukufakwa okungafanele, noma inhlanganisela yalezi zinto. Ukungahambisani namakhemikhali kuholela ekukhuphukeni, ukuthamba, ukuqina, noma ukuqhekeka kuye ngokusebenzisana kwezinto ezithile noketshezi. Ukushisa okuphezulu kusheshisa ukuhlaselwa kwamakhemikhali futhi kubangele ukuguga ngenxa yokushisa, okuqinisa i-elastomer futhi kubhubhise ubhedu lwayo. Ukufakwa okungafanele kungaholela ekulayisheni okungalingani kwamabhawodi, ukucindezelwa okunganele, noma ukulimala kwegasket ngesikhathi sokuhlanganisa. Ukuthola kahle indlela yokwehluleka kubalulekile ukuze ukhethe into yokufaka esikhundleni ezobhekana nembangela eyinhloko hhayi nje uphawu lwenkinga.

Ukusebenzisa into eyodwa yokwenza ama-gasket kuzo zonke izinhlobo zoketshezi embonini akuvamisile ukuba kube iseluleko esihle, ngoba akukho elastomer eyodwa ehlanganisa kahle zonke izigaba zokumelana namakhemikhali nokusebenza kwezinga lokushisa. I-EPDM iyehluleka emafutheni nasezinto ezivuthayo, i-NBR iyehluleka kumakhemikhali anamandla nasezingeni lokushisa eliphezulu, ngisho ne-FKM inemikhawulo ngamanye ama-solvent asemanzini kanye nesitimu. Izimboni eziningi zidinga okungenani izinto ezimbili noma ezintathu ezahlukene zokwenza ama-gasket ukuze zihlangabezane kahle nezinhlobonhlobo zoketshezi nezimo ezikhona. Nakuba kungathandeka ukusebenzisa into eyodwa ukuze kube lula ukuphatha izimpahla, izindleko zokwehluleka ngaphambi kwesikhathi nokuvuza zidlula kakhulu noma yikuphi ukonga kwezimpahla. Isu elihle lokukhetha izinto zama-gasket lilinganisa ukusebenzisa izinto ezijwayelekile nokuthuthukisa ngokuya ngesimo ngasinye.

Ama-gasket e-FKM ajwayelekile angakwazi ukuphatha amazinga okushisa aqhubekayo afinyelela ku-200°C, kanti amanye amabanga akhethekile alinganiswa ukuthi amelane nokuchayeka okuphezulu. Emazingeni okushisa aphansi, i-FKM ngokuvamile igcina ukuguquguquka okusebenzisekayo kuze kufike ku--20°C, nakuba amanye amabanga enziwe ukuze asebenze emazingeni okushisa aphansi kakhulu. Umkhawulo wangempela wezinga lokushisa uncike ekuhlanganisweni okuthile kwe-FKM, indlela ephathekayo ehilelekile, nokuthi izinga lokushisa liqhubekayo noma liyaphazamiseka. Ukuchayeka kumakhemikhali emazingeni okushisa aphezulu kunganciphisa kakhulu izinga lokushisa elivumelekile lokusebenza kwento. Hlala uqinisekisa isilinganiso sezinga lokushisa sokuhlanganiswa kwakho okuthile kwe-FKM ngokuqhathanisa namazinga okushisa aphezulu ohlelo lwakho ngaphambi kokufaka.

Indlela ethembekile kakhulu yokuqinisekisa ukuhambisana ukubonisana namashadi okuhambisana kwamakhemikhali ashicilelwe kumthengisi wakho wezinto zokugquma (gasket), okukala izinto ngokumelene namakhulu amakhemikhali ajwayelekile ezimbonini. Kufanele futhi ucele izitifiketi zezinto kanye namashadi edatha yenhlanganisela (compound data sheets) abhala izici zokusebenza zaleyo nhlanganisela oyisebenzisayo. Uma ungaqiniseki, yenza ukuhlola okulula kokucwilisa ngokubeka isampula yezinto zokugquma kumkhiqizo wangempela ezingeni lokushisa elisebenzayo, ubheke ushintsho lwesisindo, ushintsho lwevolumu, nokonakala komzimba. Cabangela umthelela wezithasiselo nokungcola, ngoba izinto zangempela emhlabeni azivamisile ukuba amakhemikhali ahlanzekile. Ithimba lobunjiniyela lakwa-Varicpand lingakusiza uqinisekise ukuhambisana futhi linikeze izincomo ezisekelwe ebufakazini mayelana nokwakheka kwakho kwemidiya ethile.

Ukukhetha impahla efanele ye-gasket kubalulekile ekuvaleni okungavuzi kanye nokwethembeka kwemishini yesikhathi eside, futhi kuqala ngomehluko oyisisekelo phakathi kwe-EPDM, FKM, ne-NBR. I-EPDM iyisinqumo esihamba phambili samanzi, umusi, nezindawo zangaphandle, inikeza ukumelana nesimo sezulu okuhle kakhulu nokusebenza kahle komswakama ngezindleko ezifinyelelekayo. I-FKM inikeza ukumelana namakhemikhali okusezingeni eliphezulu kanye nekhono lokushisa eliphezulu ezinhlelweni ezidingayo ezibandakanya uphethiloli, amafutha, nezinto ezinamandla. I-NBR ihlala iyisebenzi elingabizi kakhulu lokuphakelwa kwamafutha amaminerali kanye nezinhlelo ezijwayelekile zezimboni lapho isabelomali sibalulekile. Inqubo efanele yokukhetha ayicabangeli nje kuphela into eyinhloko kodwa futhi izinto zokuhlanza, izinga lokushisa eliphezulu naphansi, ukushintshashintsha kwengcindezi, kanye nesimo esiguquguqukayo sokusebenza. Ngokugwema amaphutha ajwayelekile okukhetha nokulandela uhlaka oluhlelekile lokukhetha, ungakwazi ukwelula isikhathi sokusebenza se-gasket kanye nokunciphisa izindleko zokunakekela.IkhayaIsisekelo sazo zonke izidingo zakho zezimboni zokuvala, i-Varicpand International inikeza ama-gasket asezingeni eliphezulu asekelwa ubuchwepheshe bokuhlahla ubunjiniyela, ukwenziwa okunembile, kanye namazinga amanani ancintisanayo. Xhumana nethimba lethu namuhla ukuze uthole izincomo zezinto, izixazululo zama-gasket ezenziwe ngokwezifiso, kanye nokusekelwa okuphelele kwephrojekthi yakho elandelayo yokuvala.