Ukukhetha impahla efanele yegasket kungesinye sezinqumo ezibaluleke kakhulu zobunjiniyela kunoma yiluphi uhlelo lokuthutha uketshezi, kodwa futhi kungenye yezinto ezivame ukunganakwa kakhulu. Yonke imisebenzi yezimboni encike emajoyintini avaliwe, kungakhathaliseki ukuthi kuhilela ukujikeleza kwamanzi ashisayo, ukudluliswa kwamakhemikhali anamandla, noma imigqa yamafutha e-hydraulic, incike engxenyeni encane yerabha ukuvimbela ukuvuza, ukungcola, kanye nokonakala kwemishini okuyinhlekelele. Lo mhlahlandlela obanzi wezinto zokwenza ama-gasket ugxile kuma-elastomer amathathu asetshenziswa kakhulu embonini: i-EPDM, i-FKM, ne-NBR, ngalinye linikeza iphrofayili ehlukile yokumelana namakhemikhali, ukubekezelela izinga lokushisa, kanye nokuqina kwemishini. Uma ufaka i-elastomer efanele kumidiya yakho ethile yezimboni, unciphisa kakhulu isikhathi sokuphumula komsebenzi, wehlise izindleko zokulungisa, futhi wandise impilo yesevisi yalo lonke uhlelo lwakho. Ngakolunye uhlangothi, impahla engafanele ingavuvukala, ibe lukhuni, iqhekeke, noma incibilike phakathi nezinsuku ezimbalwa, iphoqe ukuvalwa okuphuthumayo nokwenziwa kabusha okubizayo. Inhloso yalesi sihloko ukunikeza onjiniyela, ochwepheshe bokuthenga, namathimba okulungisa uhlaka oluthembekile lokukhetha phakathi kwama-gasket e-EPDM, FKM, ne-NBR, okuphelele ngenqubo yokuthatha izinqumo esebenzayo, izinhlu zokuhlola ukucaciswa, kanye nesiqondiso sokuxazulula izinkinga ongasisebenzisa ngokushesha emisebenzini yakho.

Ngaphambi kokuba singene emininingwaneni yobuchwepheshe be-elastomer ngayinye, kufanelekile ukuthi sifingqe izimiso eziyisisekelo ezizoqondisa zonke izinqumo ozithathayo ezigabeni ezilandelayo. Okokuqala nokubaluleke kakhulu ukuthi kufanele uqinisekise izinto ezintathu ngaphambi kokukhetha i-gasket: uketshezi olunembile oluvalwayo, ububanzi bezinga lokushisa elisebenzayo, kanye nanoma yikuphi ukuhlanzwa noma ukuvalwa kwesibulala-magciwane i-gasket ezohlangabezana nakho phakathi nempilo yayo yokusebenza. Lezi zinto ezintathu zedwa zibangela iningi lokwehluleka kwama-gasket ezimbonini, kodwa abathengi abaningi bacacisa kuphela usayizi we-flange kanye nesilinganiso sokucindezela, beshiya ukukhethwa kwempahla kungukucabanga noma umkhuba. Okwesibili, khumbula ukuthi yonke impahla ye-rubber gasket inamandla ayizalwe nayo kanye nokulinganiselwa okungokoqobo, okusho ukuthi akukho "okung краше" okujwayelekile; i-EPDM igqama emanzini nasekumelaneni nesimo sezulu kodwa yehluleka ngokushesha ngamafutha e-petroleum, kuyilapho i-NBR ibamba amafutha kahle kodwa ibola ngaphansi kwe-ozone namazinga okushisa ashubisa. Okwesithathu, ukucaciswa okungaphelele kuyimbangela enkulu yokwehluleka kwama-gasket ngaphambi kwesikhathi, ngakho njalo nikeza umthengisi wakho isethi ephelele yezimo zokusebenza kunokuba unikeze incazelo engacacile yokusetshenziswa. Okwesine, uma uthola ukuthi ukukhetha kwakho kwempahla kokuqala kwehluleka, unganqikazi ukushintsha izinto kusenesikhathi; ukubamba inkinga yokuhambisana emavikini ambalwa okuqala kokusebenza kungakonga izinyanga zokuvuza okuphindaphindayo nezindleko zokufaka esikhundleni. Okokugcina, hlala uqinisekisa ukukhetha kwakho kwempahla ngokuhlolwa kwangempela emhlabeni noma ngamashidi edatha yomkhiqizi, ngoba amashadi ajwayelekile okuhambisana awakaze abheke izingxube ezithile, izithasiselo, nokungcola okukhona ezintweni zakho zezimboni.

Ukuze wenze ukukhetha okunolwazi kokukhetha izinto zokugquma (gasket), kudingeka uqale uqonde ukuthi i-elastomer ngayinye iyini ngokwamakhemikhali nokuthi lokho khemikhali kuthonya kanjani ukusebenza kwayo emsebenzini. I-EPDM, noma i-Ethylene Propylene Diene Monomer, iyirabha yokwenziwa edume ngokumelana namanzi, umhwamuko, isimo sezulu, i-ozone, kanye nohlu olubanzi lwamakhemikhali angama-polar njengoketshezi lwamabhuleki nezinto zokuhlanza. Lokhu kwenza ama-gasket e-EPDM abe ukukhetha okuzenzakalelayo ezinhlelweni zamapayipi, izinhlelo ze-HVAC, imigqa yamanzi okuphuza, nezinqubo zokubulala amagciwane ngomhwamuko, nakuba engasebenziseki uma ethintana namafutha asuselwa kuphethiloli, uphethiloli, nezincibilikisi. I-FKM, evame ukwaziwa ngamagama okuhweba afana ne-Viton, iyirabha ye-fluorocarbon enikeza ukumelana okukhethekile namazinga okushisa aphezulu, amakhemikhali anamandla, namafutha amaminerali, okuyenza ibe ukukhetha okuphezulu ezinhlelweni ezidinga kakhulu ekucutshungulweni kwamakhemikhali, ezinhlelweni zikaphethiloli zezimoto, nezingxenye ze-aerospace. I-NBR, noma i-Nitrile Butadiene Rubber, iyi-elastomer esebenza kahle futhi engabizi kakhulu enikeza ukumelana okuhle namafutha kaphethiloli, amafutha okugcoba, nophethiloli emazingeni okushisa aphakathi, yingakho ibusa ezimakethe zokuvala zamafutha negesi, ama-hydraulic, nezimoto. Ngayinye yalezi zinto ikhiqizwa ibe ama-gasket kusetshenziswa izindlela ezahlukene zokwelapha (curing) nokwakheka kwama-compound, okusho ukuthi ama-gasket amabili anegama le-polymer elifanayo angase asebenze ngendlela ehluke kakhulu kuye nge-filler, i-plasticizer, nama-cross-linking agents asetshenziswa umkhiqizi.

I-EPDM iyinto okhethwa ngayo uma inkathazo yakho enkulu ukumelana namanzi, umusi, i-ozone, nemisebe ye-ultraviolet, okwenza kube intandokazi yokufakwa ngaphandle nezindawo ezinamanzi ezisetshenziswayo. I-gasket ye-EPDM ngokujwayelekile ingasebenza ngokuqhubekayo emazingeni okushisa asuka ku--40°C kuya ku-130°C, ngokuchayeka ngezikhathi ezithile kuze kufike ku-150°C emsebenzini womusi, futhi igcina ukuguquguquka kwayo ngisho nasezimeni eziqandayo ezingaqhekeza ezinye izinto eziningi ze-elastomer. Ngenxa yokuthi i-EPDM iyi-polymer engeyona i-polar, iyakhukhumala kakhulu uma ichayeka kuma-hydrocarbon, ngakho akufanele uyisebenzise namafutha amaminerali, uphethiloli, i-kerosene, noma uketshezi oluningi lwe-hydraulic ngaphandle uma ufuna ukwehluleka ngokushesha. Izinto zezimboni ezihambisana kahle ne-EPDM zihlanganisa amanzi okuphuza ashisayo nabandayo, amanzi angcolile, i-condensate yomusi, ama-acid ancibilikisiwe, izixazululo ze-caustic soda, ama-ketone, noketshezi olusekelwe ku-silicone, okwenza kube isixazululo esijwayelekile sokuvala ezindaweni zokuhlanza amanzi zomasipala nasezimbonini zokucubungula ukudla. Le nto iphinde ibonise ukumelana okuhle kakhulu nokucindezelwa okungapheli (compression set), okusho ukuthi igcina ukuvala okuqinile ngisho nangaphansi kwengcindezi emile yesikhathi eside, futhi isebenza kahle kakhulu ezimweni ze-gasket lapho ukushintsha kwezinga lokushisa kuvamile khona. Ezinhlelweni zokudlulisa ukushisa, ama-gasket e-EPDM avame ukutholakala kuma-plate heat exchanger, kuma-pipe flange, nasezindlini zamaphampu eziphethe amanzi noma umusi njengoketshezi olusebenzayo.

I-Fluorocarbon rubber, noma i-FKM, itholakala esigabeni esiphezulu sezinto zokwenza ama-gasket, inikeza inhlanganisela yokumelana nokushisa okuphezulu kanye nokuhambisana namakhemikhali amaningi okungavamile ukuthi ezinye izinto ze-elastomer zikwazi ukukufanisa. Ama-gasket e-FKM ngokuvamile angamelana namazinga okushisa aqhubekayo asuka ku- -20°C kuya ku-200°C, kanti ezinye izinhlanganisela ezikhethekile zilinganiswa ngaphezulu, okwenza abe ngabalulekile ezinjinini, kuma-compressor, nakuma-reactor amakhemikhali lapho amarubha ajwayelekile engahluleka khona emahoreni ambalwa. Ukumelana okukhethekile kwale nto namafutha amaminerali, ama-lubricant okwenziwa, uphethiloli, ama-hydrocarbon anamakha, kanye nama-asidi nama-solvent amaningi anamandla, kuyenza ibe ukukhetha okuthembekile ezintweni eziyinkimbinkimbi zezimboni ezingabhubhisa ngokushesha i-EPDM noma i-NBR. Nokho, i-FKM ngokuvamile ayihambisani namanzi ashisayo, umusi, ama-ester anesisindo esiphansi, kanye noketshezi oluthile olususelwa ku-amine, ngakho-ke ayisiyona isixazululo esisebenza kuyo yonke indawo naphezu kokumelana namakhemikhali okuphawulekayo. Ububi obukhulu bama-gasket e-FKM yizindleko, ngoba angaba ngaphezu kokuphindwe kaningi kunama-NBR noma ama-EPDM alinganayo, kodwa le nani eliphezulu liyathetheleleka ezimweni lapho ukuma komsebenzi okungahleliwe kanye nezingozi zokuvuza ezihlobene nokuphepha kudlula kakhulu izindleko zento. Ezimweni ezibalulekile zokuvala ezibandakanya amafutha ashisayo, izinhlelo zikaphethiloli, nokudluliswa kwamakhemikhali okugqwala, ama-gasket e-FKM ahlinzeka ngokuthembeka okudingwa amaqembu obunjiniyela, futhi thinaImikhiqizoUbubanzi buhlanganisa ama-gasket e-FKM enziwe ngokunemba okuphezulu ukuze ahlangabezane nezidingo zezimboni ezinzima.

I-nitrile rubber iyona enongayo kakhulu kwezintathu izinto ezikhulunywa ngazo kulo mhlahlandlela, futhi inikeza ukumelana okuhle kakhulu namafutha asuselwa kuphethiloli, amafutha okugcoba, uphethiloli kadizili, noketshezi lwe-hydraulic emazingeni okushisa aphakathi nendawo. I-gasket ye-NBR ivamise ukusebenza kahle phakathi kuka--30°C no-100°C, kanti ezinye izinhlanganisela ezisezingeni eliphezulu zikhuphula umkhawulo ophezulu kuye ku-120°C isikhathi esifushane, kodwa ibola ngokushesha uma ichayeka ku-ozone, ukukhanya kwelanga, nomoya wokushisa ophakeme isikhathi eside. Ukumelana namafutha okuhle kakhulu kwe-polymer kubangelwa ukutholakala kwe-polar acrylonitrile esakhiweni sayo samangqamuzana, futhi abakhiqizi bangakwazi ukulungisa leli zinga le-acrylonitrile ukuze bathuthukise ukumelana namafutha noma ukuguquguquka emazingeni okushisa aphansi kuye ngohlelo lokusebenza. Ama-gasket e-NBR asetshenziswa kabanzi ezinhlelweni zikaphethiloli zezimoto, imishini ye-hydraulic, imishini yasemkhathini kawoyela, izinhlelo ze-pneumatic, nemishini ejwayelekile yezimboni lapho i-media iyigama elikhulu likamaminerali noma uketshezi olususelwa kuphethiloli. Umkhawulo obalulekile owodwa ukuthi i-NBR ayimelani kahle noketshezi lwe-brake oluqukethe i-glycol, ama-oxygenated solvents, nama-aromatic hydrocarbons emazingeni okushisa aphakeme, ngakho kufanele uqinisekise ukuhambisana lapho i-media iqukethe izithasiselo noma izingxube. Ngenxa yokuthi ama-gasket e-nitrile ashibile futhi atholakala kalula, avame ukuba yisinqumo esizenzakalelayo sezinhlelo ezijwayelekile zokuvala izimboni, futhi singakwazi nokuhlinzeka ngezinhlanganisela ze-NBR ezenziwe ngokwezifiso uma udinga i-durometer ethile noma izinga lokushisa elithile lohlelo olukhethekile.

Ukukhetha phakathi kwe-EPDM, FKM, ne-NBR kudinga ukuhlolwa okuhlelekile kwe-media yakho, izimo zokusebenza, nokulindeleke kokusebenza, futhi ithebula lezinqumo elingezansi linikeza ireferensi esheshayo yokuqondisa inqubo yakho yokucabanga. Qala ngokuhlonza imvelo yamakhemikhali eyinhloko ye-media yakho, noma ngabe i-aqueous, oily, aggressive, noma exubile, ngoba le nto eyodwa izosusa okungenani into eyodwa ekhethwayo ngokushesha. Okulandelayo, nquma amazinga okushisa aphezulu naphansi azobhekana nawo i-gasket yakho, kufaka phakathi izimo zesikhashana zokuqalisa nokucisha, ngoba imikhawulo yokushisa ivamise ukukhipha i-NBR ezinhlelweni zikawoyela ashisayo noma i-EPDM ezinsizeni zomusi ezingeni eliphezulu. Okwesithathu, cabanga ngezinga lokucindezela nokuthi ngabe isicelo sakho sibandakanya ukunyakaza okuguquguqukayo, ukushintshashintsha kokushisa, noma ukudlidliza, ngoba lezi zingcindezi zemishini zingasheshisa ukusetha kokucindezela nokuqhekeka kokukhathala ezintweni ezibuthakathaka. Ekugcineni, cabanga ngokuchayeka emvelweni, imvamisa yokuhlanza, nezidingo zokuthobela imithetho ezifana nokugunyazwa kwe-FDA kokuthintana nokudla noma isitifiketi samanzi okuphuza, okungase kukuphoqe ukuthi ukhethe izinga elithile lezinto.

Uma imidiya yakho iqukethe ingxube yamakhemikhali, njenge-emulsion yamanzi namafutha noma uphethiloli ohlanganiswe ne-solvent, kufanele uhlole ingxenye ngayinye bese ukhetha into engamelana nento enobungozi kakhulu kuyilapho isamela ezinye ngokwanele. Isibonelo, uhlelo lwe-hydraulic oluthola ukungcola kwamanzi ngezikhathi ezithile lungadinga i-NBR compound enokuncipha kokumunca amanzi, kuyilapho umugqa wokulayisha amakhemikhali othwala i-caustic soda namafutha amaminerali kungenzeka udinge i-FKM gasket ngoba akukho elastomer eyodwa enezindleko eziphansi engamela kokubili okwedlulele. Emidiyeni exubile noma engaqinisekile, hlala ucela ishadi lokuhambisana namakhemikhali kumthengisi wakho futhi, uma kungenzeka, yenza ukuhlolwa kokucwilisa kwamasampula ama-gasket eketshezini lakho langempela lokusebenza ngaphambi kokwenza i-oda eliphelele lokukhiqiza. Futhi khumbula ukuthi izinga lokushisa liyasheshisa ukuhlasela kwamakhemikhali, ngakho into esebenza kahle ku-25°C ingakhukhumala noma ibole ngokushesha ku-80°C ngisho noma inokwakheka okufanayo kwemidiya. Uma imboni yakho isebenzisa izinhlobo eziningi zemidiya emigqeni ehlukene, ukusebenzisa isethi elinganiselwe yezinto zama-gasket, njenge-EPDM yayo yonke insiza yamanzi kanye ne-NBR yayo yonke insiza yamafutha, kwenza ukuphathwa kwempahla kube lula futhi kunciphisa ubungozi bokufaka i-gasket engalungile ngesikhathi sokulungisa.

Ngisho noma uhlela ngokucophelela, ungathola ukuthi i-gasket yakho yokuqala ayihambisani ne-media yangempela noma izimo zokusebenza, futhi ukuqaphela izimpawu zokwehluleka kusenesikhathi kubalulekile ekunciphiseni umonakalo. Ukuvuvukala, ukuthamba, nokukhula kobukhulu kuvame ukuba izinkomba zokuqala zokuthi i-gasket imunca uketshezi lwenqubo, kuyilapho ukuqina, ukuqhekeka, noma ukushintsha kombala ebusweni kukhombisa ukucekelwa phansi kwamakhemikhali noma ukuhlaselwa ukushisa. Uma ubona noma yiziphi zalezi zimpawu, indlela esheshayo yokululama ukushintshela ngqo kumathiriyeli onobunzima obuphambene ngamakhemikhali, okusho ukuthi uma i-oil-based media ihlasela i-gasket yakho ye-EPDM, shintshela ku-NBR noma i-FKM ngokushesha, futhi uma i-aqueous noma i-steam media icekela phansi i-gasket yakho ye-NBR, shintshela ku-EPDM. Ezimweni zokushisa okuphezulu lapho kokubili uwoyela nokushisa kukhona, ukushintshela ngqo ku-FKM kuqeda ukungaqiniseki futhi kunikeza umkhawulo wokuphepha obanzi kakhulu, nakuba kubiza kakhulu nge-gasket ngayinye. Khumbula ukuthi ukushintsha akukhona nje ukuthenga i-gasket entsha; kufanele futhi uhlanze izindawo ze-flange, ususe noma yimuphi umsinsi we-rubber ocekelelwe phansi, futhi uqinisekise ukuthi umathiriyeli omusha ungena kahle ku-groove noma ku-gasket envelope ngaphambi kokuhlanganisa kabusha. Uma ungaqinisekile ngokushintsha, xhumana nethimba lethu lobunjiniyela nge-Xhumana ikhasi, futhi singakuncoma ukuhlanganiswa okuthile, ukuqina, kanye nephrofayili yegasket ngokusekelwe endleleni yakho yokuhluleka ebhaliwe kanye nedatha yokusebenza.

Ukucaciswa okunembile, okuphelele kuyisisekelo sokuthenga i-gasket ngempumelelo, futhi uhlu lokuhlola olunikezwe kulesi sigaba luzokusiza ulungise isicelo sokucaphuna (RFQ) abathengisi abangakwazi ukucaphuna ngokunembile emzamweni wokuqala. Okungenani, i-RFQ yakho kufanele ifake into evinjiwe, kuhlanganise negama lamakhemikhali, ukugxila, nanoma yiziphi izithasiselo noma ukungcola, ngoba igama elijwayelekile elinjenge-“oyela” alisho lutho ngaphandle kokwazi ukuthi iyini i-mineral oil, i-synthetic oil, noma uphethiloli ohlanganisiwe. Kufanele futhi usho ububanzi bezinga lokushisa elisebenzayo, kuhlanganise nezinga lokushisa le-ambient, eliphezulu, eliphansi, nanoma yiziphi izimo zokukhuphuka kwamandla, kanye nomfutho omkhulu i-gasket ezowuthola ngesikhathi sokusebenza okuvamile nangesikhathi sokukhuphuka komfutho. Uhlobo lwe-gasket, noma ngabe i-full-face gasket, i-ring gasket, i-spiral wound, noma i-custom die-cut profile, kufanele lucaciswe, kanye nobukhulu obunembile obufana ne-inner diameter, i-outer diameter, nobukhulu, kanye ne-flange standard noma i-face finish i-gasket ezovala ngayo. Faka ubulukhuni be-durometer obudingekayo, ngokuvamile obulinganiswa nge-Shore A scale, ngoba lokhu kunquma ikhono le-gasket lokuvumelana nokungalingani kwe-flange ngaphandle kokuchoboza, futhi qaphela noma yimiphi imikhawulo ye-compression set noma i-creep relaxation edingwa isicelo sakho. Ekugcineni, bhala wonke amazinga okuthobela kanye nezitifiketi ezidingekayo, njenge-FDA, USP Class VI, NSF, WRAS, noma izindlela ezithile zokuhlola ze-ASTM, ngoba lezi zimfuneko zinganciphisa izinhlobo zezinto ezitholakalayo futhi zandise izikhathi zokulethwa.

Ukuze kube lula lokhu, sincoma ukuthi wonke unjiniyela nomthengi basebenze ngesakhiwo esijwayelekile sokucaciswa kwegasket esiphoqa ukuthi kubhalwe ngokugcwele ukuthi iyiphi i-media, izinga lokushisa, umfutho, uhlobo, ubukhulu, ukuqina (durometer), nokuthobela izindinganiso. Isibonelo sethemplate ye-RFQ singafundeka kanje: "I-gasket yobuso obugcwele, i-EPDM, i-65 Shore A, 150 mm ID x 200 mm OD x 3 mm ubukhulu, yomhwamuko ogcwele we-1.0 MPa ku-180°C, ukusebenza okuqhubekayo, ivunyiwe yi-WRAS, inani elingama-200." Uma unikeza lolu lwazi oluningiliziwe, abahlinzeki bangakwazi ukufanisa ngokushesha izinga lezinto, baqinisekise ukuhambelana kwamakhemikhali, futhi bakhiqize isilinganiso esinembile ngaphandle kwemibuzo elandelayo engabambezela isheduli yephrojekthi yakho. Kuyahlakanipha futhi ukufaka isheduli yakho yokulungisa kanye nomjikelezo wokusebenza olindelekile, ngoba i-gasket esebenza amahora angu-24/7 ezingeni lokushisa eliphezulu izodinga inhlanganisela eqinile kunaleyo esebenza amahora ambalwa ngosuku. Ngezidingo ezikhethekile, siyajabula ukusebenzisana nawe ngesikhathi sokucacisa, futhi eyethu...Mayelana Nathi ikhasi lichaza amakhono ethu obunjiniyela nokuzibophezela kwethu ekusekeleni amakhasimende kusukela ekuklanyweni kokuqala kuze kube ukulethwa kokugcina.

Ukuqonda izindlela ezijwayelekile zokwehluleka kwamagasket enjoloba kubalulekile ukuze kutholakale izinkinga ngokushesha nokuqalisa izinyathelo zokulungisa ezivimbela ukuphindeka. Ukwehluleka okuvame kakhulu ozohlangana nakho ukuvuza endaweni ye-flange, okungabangelwa ukungalingani kwe-bolt torque, ukungahambisani kwe-flange, ukucindezelwa kwegasket (compression set), noma ukuvuvukala kwamakhemikhali okunciphisa amandla okuvala egasket. Inkinga yesibili evamile i-blowout, lapho igasket likhishwa noma likhishwe ejoyintini ngenxa yomfutho oweqile noma izinga lokushisa elithambisa injoloba ngale kwamandla ayo, okuvame ukukhombisa ukuthi impahla ayiklelisiwe ezimweni ezinzima kakhulu. Ukuvuvukala kungenye inkinga enkulu, ikakhulukazi lapho i-elastomer ichayeka kumidiya engahambisani nayo, okwenza igasket likhule, liphambuke, futhi ekugcineni lilahlekelwe ukuzinza kobukhulu nokuqina kokuvala. I-compression set, ukulahlekelwa kancane kancane kokubuyela esimweni sangaphansi kwengcindezi eqhubekayo, ibangela ukuthi amagasket acishe abe yisicaba unomphela futhi angakwazi ukugcina umfutho wokuvala, okuyinkinga ikakhulukazi ezimweni zokushisa okuphezulu lapho ukuguga okubangelwa ukushisa kusheshisa lokhu kwenzeka.

Kuma-gasket ze-EPDM, ukwehluleka okuvame kakhulu ukuhlaselwa uphethilomu, okubangela ukuvuvukala okubonakalayo, ukuthamba, kanye nobuso obunamathelayo obuyisici, futhi isixazululo ukushintshela ku-NBR noma i-FKM kuye ngezinga lokushisa nokuqina kwamakhemikhali. Lapho ama-gasket e-FKM ehluleka, imbangela imvamisa ukuchayeka emanzini ashisayo noma umusi, okubangela ukucekelwa phansi okuthile okwaziwa ngokuthi ukwehla kwengcindezi noma "ukukhipha igesi," noma ukuhlaselwa uketshezi olunama-amine, futhi ikhambi ukukhetha izinga le-FKM elikhethekile noma ukushintshela ku-gasket ehlanganiswe nge-PTFE ukuze uthole insiza yomusi enzima kakhulu. Ama-gasket e-NBR avame ukwehluleka ngenxa yokuqhekeka kwe-ozone, ikakhulukazi ezindaweni ezingaphandle noma eduze nezimoto zikagesi, noma ngenxa yokuguga okushisayo okuqinisa irabha futhi kudale imifantu ebusweni, kokubili okubhekwana nakho kangcono ngokushintshela ku-EPDM uma i-media ingenamafutha noma i-FKM uma ukumelana namafutha kufanele kugcinwe. Kuso sonke isimo sokwehluleka, kubalulekile ukubhala uhlobo lokwehluleka, ukuthatha izithombe, nokugcina isampula ye-gasket ehlulekile ukuze umthengi wakho akwazi ukwenza ukuhlaziywa kwembangela eyimpande futhi ancome inhlanganisela eqinisiwe. Ithimba lethu lobuchwepheshe lingahlaziya ama-gasket akho ahlulekile futhi linikeze imibiko eningiliziwe, futhi ungahlala ubuyekezwa ngezindlela ezingcono zokuvala ngokusebenzisa i-Izindaba ikhasi, elishicilela izindatshana ezijwayelekile ngokunakekelwa kwama-gasket nokusungulwa kwezinto ezintsha.

Varicpand International isungule ukuthi iyisiza esithembekile sokukhiqiza ezinkampanini ezidinga ukunemba, ukuqina, kanye nekhwalithi engaguquki ezingxenyeni zazo zokuvala, okuhlanganisa ama-EPDM, FKM, nama-NBR gaskets. Amandla ethu okukhiqiza ahlanganisa izinhlobonhlobo zezinqubo zokuhlanganisa i-elastomer, ukubumba, kanye nokusika, okusivumela ukuthi sikhiqize ama-gaskets ajwayelekile kanye nezixazululo ezenziwe ngokwezifiso ezigcwalisa izidingo ezithile zobukhulu nokusebenza kwesicelo sakho. Sihlanganisa ubuchule bethu bangaphakathi bokwakhiwa kwe-rubber nokuhlolwa okuqinile kokulawula ikhwalithi, siqinisekisa ukuthi i-gasket ngayinye ihlangabezana nokuqina, ukucindezelwa, kanye nokumelana namakhemikhali okudingayo ngaphambi kokuba ithunyelwe esikhungweni sakho. Ngaphezu kwama-gaskets ngawodwa, sizibeka njengomhlinzeki ophelele we-sealing stack, okusho ukuthi singahlinzeka hhayi nje i-gasket kuphela, kodwa nengxenye ezihambisana nayo kanye nemihlangano eqedela uhlelo lwakho lokuvala, okwenza kube lula ukutholakala kwempahla nokunciphisa ubunkimbinkimbi bokuthenga. Ukwesekwa kwethu kwezobunjiniyela akupheli esigabeni sokucaphuna; sisebenza neqembu lakho ukuze silungise ukukhethwa kwezinto, siqinisekise ukuhambisana, futhi sixazulule izinkinga zasensimini, sisebenzisa ulwazi lweminyaka eminingi lokusebenza ngezinto zezimboni emikhakheni eminingi. Ngokubambisana nomkhiqizi oqonda kokubili ikhemistri kanye nezimo zomshini zenqubo yakho, uthola inzuzo yokuncintisana ekuphakameni kokusebenza, ukuphepha, kanye nezindleko zobunikazi, futhi siyakumema ukuthi uhlole uhla lwethu oluphelele lwemikhiqizo, okuhlanganisa eyethu.Ikhaya ikhasi, ukuze ubone ukuthi singakusekela kanjani iphrojekthi yakho yokuvala elandelayo.

Ukukhetha impahla efanele yegasket akusona isinqumo esincane sokuthenga; isinqumo sobunjiniyela esibalulekile esithinta ngqo ukuthembeka, ukuphepha, kanye nenzuzo yemisebenzi yakho yezimboni. Ngokuqonda amandla nokulinganiselwa okuhlukile kwama-gasket e-EPDM, FKM, kanye ne-NBR, nangokufanisa lezo zakhiwo nezinto zakho ezithile, izinga lokushisa, nezimo zemvelo, ungavimbela ukwehluleka okuningi kokuvala ngaphambi kokuba kwenzeke. Ukhiye wempumelelo usekucacisweni okuphelele, okusho ukubhala phansi yonke imininingwane efanele yenqubo, nasekuqinisekisweni kwangaphambi kwesikhathi kwempahla, okusho ukuhlola ukukhetha kwakho kwegasket ngaphansi kwezimo zokusebenza zangempela ngaphambi kokuthi wandise ukuthenga. Uma ukukhetha kwakho kokuqala kungafaneleki, yenza ngokushesha ukushintsha izinto, futhi njalo sebenzisana nomthengisi onikeza ubuchwepheshe kanye nokuguquguquka kokukhiqiza ukuze avumelane nezidingo zakho ezishintshayo. Siyethemba ukuthi lo mhlahlandlela wezinto zegasket ukunikeze ukuzethemba nohlaka olusebenzayo oludingekayo ukuze wenze izinqumo ezingcono zokuvala, futhi sikukhuthaza ukuthi uxhumane nethimba lethu noma nini lapho udinga usizo ngohlelo oluyinselele. Ukuze uthole ulwazi oluningi mayelana nemikhiqizo yethu yegasket nezinsizakalo zokukhiqiza ngokwezifiso, sicela uvakashele iwebhusayithi yethu.Imikhiqizo ikhasi, futhi khumbula ukuthi ukukhetha i-gasket efanele yiyona ndlela engabizi kakhulu yokuvikela imishini yakho kanye nenzuzo yakho.

EPDM, FKM, kanye ne-NBR yizinto ezintathu ezihlukile ezinama-elastomer anezakhiwo zamakhemikhali ezihlukile kanye nokusebenza okuhlukile. I-EPDM, noma i-Ethylene Propylene Diene Monomer, ihle kakhulu emanzini, umusi, isimo sezulu, namakhemikhali asemanzini kodwa ayihambisani namafutha e-petroleum. I-FKM, noma i-fluorocarbon rubber, inikeza ukumelana nokushisa okuphezulu kakhulu kanye nokuhambisana namakhemikhali okubanzi, okwenza ifanelekele izimo ezinzima nezinokushisa okuphezulu. I-NBR, noma i-Nitrile Butadiene Rubber, inikeza ukumelana okuhle namafutha nophethiloli ngentengo ephansi kodwa iyona kakhulu uma ithintwa i-ozone nokushisa okuphezulu.

Kwezinhlelo ezijwayelekile zikawoyela wepetroleum noketshezi lwe-hydraulic, ama-gasket e-NBR (nitrile) ngokuvamile ayikhetho elihle kakhulu futhi elonga imali ngenxa yokumelana kwawo nokugcoba kahle kanye nezinga lokushisa elilinganiselwe. Kodwa-ke, uma uhlelo lwakho lukawoyela lusebenza emazingeni okushisa aphakeme ngaphezu kuka-120°C noma lufaka ama-oyela okwenziwa anamandla kanye namafutha anephunga elimnandi, ama-gasket e-FKM ahlinzeka ngokusebenza okuphezulu nokuphila isikhathi eside. Hlala uqinisekisa ukwakheka kukawoyela kanye nebanga lokushisa ngaphambi kokukhetha phakathi kwe-NBR ne-FKM.

I-EPDM iyimpahla ekhethwayo yamagasket emanzini, umusi, amanzi angcolile, kanye nezinto eziningi ezinamanzi ngenxa yokumelana kwayo okukhethekile noketshezi lwe-polar kanye nekhono layo lokumelana namazinga okushisa afinyelela ku-150°C emsebenzini womusi. I-NBR akufanele isetshenziselwe izinhlelo zamanzi ezidinga ukuchayeka isikhathi eside, futhi i-FKM ngokuvamile ayihambelani namanzi ashisayo kanye nomusi. Ezinhlelweni zamanzi okuphuza, qinisekisa ukuthi i-gasket yakho ye-EPDM ihlangabezana nezindinganiso ezifanele zokulawula ezifana ne-WRAS noma i-NSF.

Ama-gasket e-FKM ajwayelekile angasebenza ngokuqhubekayo emazingeni okushisa afinyelela ku-200°C, kanti amanye ama-compound akhethekile alinganiselwa ngaphezulu noma ngokuchayeka isikhathi esifushane. Leli khono lokushisa eliphezulu lenza i-FKM ibe yinto ekhethwayo yama-seal enjini, ama-gasket e-compressor, kanye nokusetshenziswa kokucubungula amakhemikhali lapho amanye ama-elastomer engasebenza khona. Nokho, umkhawulo wangempela wokushisa uncike ezingeni elithile le-FKM kanye nento eliyivalayo, ngakho-ke hlala ubheka idatha yomkhiqizi.

Izimpawu ezivamile zokungahambisani kwe-gasket material zihlanganisa ukuvuvukala okubonakalayo, ukuthamba, ukuqhekeka, ukuqina, ukushintsha kombala ebusweni, noma ukuthinta okunamathelayo noma okunamathiselayo ebusweni be-gasket. Ungase futhi uqaphele ukuvuza okuphindelelayo e-flange ngisho nangemva kokuqinisa okufanele, noma ukuncipha kancane kancane kwamandla okuvala ngokuhamba kwesikhathi. Uma ubona lezi zimpawu, i-gasket kungenzeka ukuthi imunca noma ihlaselwa yi-process media, futhi kufanele ushintshele ku-material ehambisanayo ngokusekelwe kumhlahlandlela wakho we-gasket material.

Ngokuvamile, akunconywa ukusebenzisa i-gasket eyodwa ezintweni ezihluke kakhulu, ngoba i-elastomer ngayinye inemikhawulo yayo. I-EPDM izohluleka ngamafutha, i-NBR izohluleka nge-steam ne-ozone, kanti i-FKM izohluleka ngamanzi ashisayo namanye ama-amine. Ezikhungweni eziphethe izinto ezihlukahlukene, kuphephile ukusebenzisa iqoqo elincane lezinto, njenge-EPDM yezinhlelo zamanzi ne-NBR noma i-FKM yezinhlelo zamafutha, futhi umake izigxivizo ngokucacile ukuze uvimbele amaphutha okufaka.

I-RFQ yakho ye-gasket kufanele ifake imidiya nokwakheka kwamakhemikhali okunembile, ububanzi bezinga lokushisa lokusebenza (okuncane nokukhulu), ingcindezi ephezulu, uhlobo lwe-gasket (full-face, ring, custom), ubukhulu (ID, OD, ukujiya), ukuqina kwe-durometer okudingekayo, kanye nazo zonke izitifiketi zokuthobela imithetho ezifana ne-FDA noma i-WRAS. Ukunikeza lolu lwazi oluphelele kuqinisekisa ukuthi abathengisi bangakwazi ukuncoma i-EPDM, i-FKM, noma i-NBR compound efanele futhi banikeze isilinganiso esinembile ngaphandle kwemibuzo elandelayo ebizayo.

Ama-gasket e-FKM abiza kakhulu ngoba i-fluorocarbon rubber inezindleko eziphakeme zempahla eluhlaza ngenxa yenqubo eyinkimbinkimbi ye-fluorination edingekayo ukukhiqiza i-polymer. Lezi zindleko ziyathetheleleka ngokusebenza kahle kwe-FKM emazingeni okushisa aphezulu, ukumelana namakhemikhali okubanzi, kanye nokuphila isikhathi eside ezimweni ezidingayo, okunganciphisa izindleko zokulungisa zizonke ngokuhamba kwesikhathi. Ezinhlelweni ezingadingi ukusebenza okwedlulele kwe-FKM, i-NBR inikeza enye indlela eyonga kakhulu.

Yebo, ama-gasket e-EPDM ngokuvamile ahambisana noketshezi lwamabhuleki olususelwa ku-glycol, olunobunjalo be-polar, okwenza i-EPDM ibe ukukhetha okufanele ezinhlelweni zamabhuleki e-hydraulic. Ngokuphambene, ama-gasket e-NBR anganconyiwa uketshezini lwamabhuleki olususelwa ku-glycol ngoba azokhukhumala futhi abolakale. Uma uhlelo lwakho lwamabhuleki lusebenzisa uketshezi olususelwa ku-silicone noma uwoyela wamaminerali, nokho, kufanele ukhethe into ehlukile, ngakho hlala uqinisekisa uhlobo oluthile loketshezi.

Kufanele ushintshe izinto zokugquma ngokushesha nje lapho ubona inkinga yokuhambisana noma yokusebenza, okungcono kakhulu phakathi nezinsuku zokuqala kokuhluleka okubonwayo, ukuze uvimbele ukuvuza okuphindelelayo nokulimala kwemishini. Ukulibazisa ukushintsha kuholela ekumisweni okuphindelelayo, izingozi ezingaba khona zokuphepha, kanye nezindleko ezikhulayo ngenxa yokushintshwa njalo nokuphazamiseka kokukhiqiza. Uma usushintshile, qapha igasket entsha eduze phakathi namaviki okuqala enkonzo ukuze uqinisekise ukuthi ukukhethwa kwezinto kuxazulula inkinga.