I-PTFE Coated O-Ring
Iyini i-PTFE Coated O-Rings
Ama-O-coated O-rings ayizigxivizo eziyinhlanganisela ezine-O-ring core yenjoloba (isb, i-NBR, i-FKM, i-EPDM, i-VMQ) njenge-substrate enwebekayo, lapho kusetshenziswa khona ifilimu elincanyana, elifaniswayo, neliboshwe ngokuqinile le-polytetrafluoroethylene (PTFE). Lesi sakhiwo sihlanganisa izinzuzo zazo zombili izinto, okuholela ezicini zokusebenza eziyingqayizivele.
Izindawo Zokufaka Isicelo Eziyinhloko
Ngenxa yezakhiwo zabo ezivelele, ama-O-rings ahlanganiswe ne-PTFE asetshenziswa kabanzi ezindaweni ezifunwayo ezinezidingo ezikhethekile zokuvala uphawu:
Imboni Yekhemikhali ne-Petrochemical:
Amavalvu okuvala, amaphampu, ama-reactors, nama-flange amapayipi aphatha imidiya egqwala kakhulu njengama-asidi aqinile, ama-alkali aqinile, ama-oxidizer aqinile, nezinyibilikisi eziphilayo.
Ukubekwa uphawu ezinhlelweni zokulethwa kwamakhemikhali ahlanzeke kakhulu ukuze kuvinjelwe ukungcola.
Imboni Yezemithi ne-Biotechnology:
Ukuvala okokusebenza okudinga ukuhlanzeka okuphezulu, ukungacwilisi, nokungangcoliswa (isb., ama-bioreactors, ama-fermenters, amasistimu okuhlanza, imigqa yokugcwalisa).
Ukuvalwa kumelana nezihlanzi zamakhemikhali ezinokhahlo kanye nesitimu sezinga lokushisa eliphezulu elisetshenziswa ezinqubweni ze-CIP (Clean-in-Place) kanye ne-SIP (Sterilize-in-Place).
Imboni Yokudla Neziphuzo:
Izigxivizo zemishini ehlangabezana nemithetho ye-FDA/USDA/EU yokuxhumana nokudla (isb., okokusebenza, okokugcwalisa, amapayipi).
Ingazweli kuma-ejenti okuhlanza izinga lokudla nama-sanitizer.
I-Semiconductor & Electronics Industry:
Izimpawu zamanzi e-ultrapure (UPW) namakhemikhali ahlanzekile kakhulu (ama-acids, ama-alkali, izincibilikisi) ukulethwa kanye nezinhlelo zokubamba, ezidinga ukukhiqizwa kwezinhlayiyana eziphansi kakhulu kanye ne-ion leaching yensimbi.
Izigxivizo zamagumbi okuvala kanye nemishini yokucubungula i-plasma (edinga ukuphuma kogesi okuphansi).
Imboni Yezimoto:
Ukubeka uphawu ezindaweni ezinethempelesha ephezulu njengamasistimu e-turbocharger namasistimu e-EGR.
Ama-seal adinga ukungqubuzana okuphansi nokumelana namakhemikhali kuma-transmission namasistimu kaphethiloli.
Izinhlelo zokusebenza ezinhlelweni zokupholisa ibhethri lemoto yamandla amasha.
I-Aerospace nokuvikela:
Izivalo ezidinga ukwethembeka okuphezulu, ukumelana nezinga lokushisa okwedlulele, kanye nokumelana nezibaseli ezikhethekile/uketshezi olunamanzi amaningi kumasistimu asebenza ngamanzi, amasistimu kaphethiloli, nezinhlelo zokulawula imvelo.
Imboni Ejwayelekile:
Izigxivizo zamasilinda womoya kanye nawe-hydraulic adinga ukungqubuzana okuphansi, impilo ende, nokungagugi (ikakhulukazi ukunyakaza okuphindaphindayo kwesivinini esikhulu, imvamisa ephezulu).
Izigxivizo zamavalvu ahlukahlukene, amaphampu, nezixhumi ezidinga ukumelana namakhemikhali kanye nezakhiwo ezingezona izinduku.
Izigxivizo zemishini ye-vacuum (edinga ukuphuma kancane).
Izinzuzo Eziyingqayizivele kanye Nezimpawu Zokusebenza
Inzuzo eyinhloko ye-PTFE-coated O-rings ilele ekusebenzeni okuthuthukisiwe kwenhlanganisela etholakala esakhiweni sawo:
Ukungangeni Kwamakhemikhali Okukhethekile:
Enye yezinzuzo eziyinhloko. I-PTFE ikhombisa ukumelana okuvelele cishe kwawo wonke amakhemikhali (okuhlanganisa ama-acids aqinile, ama-alkali aqinile, i-aqua regia, izinyibilikisi eziphilayo, njll.), iningi lama-substrates enjoloba elingakwazi ukukufeza liwodwa. I-coating ihlukanisa ngokuphumelelayo imidiya egqwalayo kunkambo yerabha engaphakathi, enweba ngokuphawulekayo ububanzi bokusetshenziswa kwe-O-ring ezindaweni zamakhemikhali ezeqisayo.
I-Coefficient Ephansi Kakhulu Yefriction (CoF):
Inzuzo ebalulekile. I-PTFE inenani elilodwa lamanani aphansi e-CoF phakathi kwezinto eziqinile ezaziwayo (imvamisa engu-0.05-0.1). Lokhu kwenza ama-O-rings amboziwe aphumelele ezinhlelweni zokuvala eziguquguqukayo (isb., izinti ze-piston eziphindaphindayo, ama-shaft ajikelezayo):
Inciphisa ngokuphawulekayo ukuhlukana nokushayisana okusebenzayo.
Inciphisa ukushisa nokuguga okubangwa ukungqubuzana.
Inweba impilo ye-seal (ikakhulukazi kuzinhlelo zokusebenza ezinesivinini esikhulu, zamafrikhwensi aphezulu).
Ithuthukisa ukusebenza kahle kwamandla esistimu.
Ibanga Lokushisa Elibanzi Lokusebenza:
I-PTFE enamathelayo igcina ukusebenza kulo lonke izinga lokushisa elibanzi kakhulu ukusuka ku -200°C ukuya +260°C (isikhathi esifushane kufika ku-+300°C). Lokhu kunweba kakhulu umkhawulo wokushisa ongaphezulu we-O-ring yerabha eyisisekelo (isb, isisekelo se-NBR sivamise ukukhawulelwa ku-~120°C, kodwa nge-PTFE enamathelayo ingasetshenziswa emazingeni okushisa aphakeme, kuye ngenjoloba ekhethiwe). Ukusebenza kwezinga lokushisa eliphansi nakho kuyaqinisekiswa.
Izakhiwo Ezinhle Kakhulu Ezingagxili kanye Nokungamanzi:
I-PTFE inamandla angaphezulu aphansi kakhulu, ayenza imelane kakhulu nokunamathela nokungamanzisi kokubili kwamanzi noketshezi olusekelwe kuwoyela. Lokhu kubangela ukuthi:
Ukunciphisa ukungcoliswa, ukupheka, noma ukunamathela kwezinsalela zemidiya ezindaweni ezivaliwe.
Ukuhlanza okulula, kulungele ikakhulukazi imikhakha yenhlanzeko ephezulu njengokudla nekhemisi.
Kugcinwe ukusebenza kokuvala ngisho nemidiya ye-viscous.
Ukuhlanzeka Okuphezulu Nokungafinyeleleki Okuphansi:
Indawo enamathelayo ye-PTFE ebushelelezi, eminyene inciphisa ukuphuma kwezinhlayiya, izithasiselo, noma izinto ezinesisindo esiphansi. Lokhu kubalulekile ekusetshenzisweni kokuhlanzeka okuphezulu kakhulu kuma-semiconductors, i-pharma, i-biotech, kanye nokudla nesiphuzo, ukuvimbela ngempumelelo ukungcoliswa komkhiqizo.
Ukumelana Okuhle Kwe-Wear:
Nakuba ukumelana nokugqokwa kwe-PTFE ngokwemvelo kungalungile, i-CoF yayo ephansi kakhulu inciphisa ngokuphawulekayo amazinga okuguga. Uma ehlanganiswa ne-substrate yenjoloba efanelekile (enikeza ukusekela nokuqina) kanye nokuqedwa kwendawo efanele/ukugcoba, ama-O-rings amboziwe ngokuvamile abonisa ukumelana nokugqokwa okungcono kune-O-ring yerabha engenalutho ezinhlelweni eziguqukayo.
Ukumelana Kwamakhemikhali Okuthuthukisiwe Kwe-Rubber Substrate:
I-coating ivikela ingaphakathi lerabha elingaphakathi ekuhlaselweni kwemidiya, okuvumela ukusetshenziswa kwezinto zerabha ezinezakhiwo ezingokwemvelo ezingcono (njengokunwebeka noma izindleko, isb, i-NBR) kumidiya evame ukuvuvukala, iqine, noma yehlise isithunzi. "Ivikela" ngempumelelo ukunwebeka kwerabha nge-PTFE's chemical resistance.
Ukuhambisana Okuhle kwe-Vacuum:
Izigqoko ze-PTFE zekhwalithi ephezulu zinokuminyana okuhle kanye nokukhipha umoya okuphansi ngokwemvelo, kuhlanganiswe nokunwebeka kwengqikithi yenjoloba, ihlinzeka ngokuvaleka kwe-vacuum okusebenzayo.
3.Ukucatshangelwa Okubalulekile
Izindleko: Iphakeme kune-O-rings yerabha evamile.
Izidingo Zokufaka: Kudinga ukuphathwa ngokucophelela ukuze ugweme ukulimaza ukunamathela ngamathuluzi abukhali. Ama-grooves okufaka kufanele abe nama-chamfer anele okuhola kanye nokuqedwa okubushelelezi.
Ubuqotho be-Coating: Ikhwalithi ye-coating (ukunamathela, ukufana, ukungabi khona kwamaphinikhodi) ibalulekile. Uma i-coating iphulwa, irabha eveziwe ilahlekelwa ukumelana kwayo kwamakhemikhali okuthuthukisiwe.
Isethi Yokucindezela: Incike kakhulu ku-substrate yerabha ekhethiwe. I-coating ngokwayo ayinikezi ukuqina okucindezelayo.
Impilo Yesevisi Enamandla: Nakuba iphakeme kakhulu kunenjoloba engenalutho, okokunamathela kuzogcina kugugile ngaphansi kokunyakaza okuphindaphindayo okunesikhathi eside, okunamandla noma okuzungezayo. Ukukhetha amarabha ayisisekelo angagugi (isb., i-FKM) kanye nomklamo olungiselelwe kungandisa impilo.
Isifinyezo
Inani eliyinhloko le-PTFE-coated O-rings lilele endleleni okokunamathela kwe-PTFE okunikeza ngayo ukungazenzisi kwamakhemikhali, i-coefficient ephansi kakhulu yokungqubuzana, izinga lokushisa elibanzi, izici ezinganamathi, ukuhlanzeka okuphezulu, nokuvikelwa kwe-substrate kuma-O-rings enjoloba evamile. Ziyisixazululo esifanelekile sezinselele ezidinga ukuvala ezifaka ukugqwala okuqinile, ukuhlanzeka okuphezulu, ukungqubuzana okuphansi, nezinga lokushisa elibanzi. Lapho ukhetha, kubalulekile ukukhetha okufanelekile kwe-substrate yenjoloba kanye nokucaciswa kokunamathela okusekelwe kuhlelo lokusebenza oluthile (imidiya, izinga lokushisa, ukucindezela, okuguquguqukayo/okumile), futhi uqinisekise ukufakwa nokugcinwa okulungile ukuze kulondolozwe ubuqotho be-coat kanye nokusebenza kokuvala.
Ithebula elingezansi lifingqa izici ezibalulekile kanye nokusetshenziswa kwe-PTFE-coated O-rings:
