PTFE Rufaffen O-Ring
Menene PTFE Coated O-Rings
PTFE-rubutun O-zobba sune hatimai masu haɗaka da ke nuna ainihin roba O-ring core (misali, NBR, FKM, EPDM, VMQ) azaman simintin roba, wanda akan sanya fim ɗin bakin ciki, uniform, da tabbataccen haɗin gwiwa na polytetrafluoroethylene (PTFE). Wannan tsarin ya haɗu da fa'idodin kayan biyu, yana haifar da halaye na musamman.
Wuraren Aikace-aikacen Farko
Saboda fitattun kaddarorin su, O-zoben da ke da rufin PTFE ana amfani da su sosai a cikin wuraren da ake buƙata tare da buƙatun hatimi na musamman:
Masana'antar Chemical & Petrochemical:
Bawul ɗin rufewa, famfo, reactors, da flanges na bututu suna ɗaukar kafofin watsa labarai masu lalata sosai kamar acid mai ƙarfi, alkalis mai ƙarfi, oxidizers mai ƙarfi, da kaushi na halitta.
Rufewa a cikin tsaftataccen tsarin isar da sinadarai don hana kamuwa da cuta.
Masana'antar Pharmaceutical & Biotechnology:
Rufe kayan aikin da ke buƙatar tsafta mai girma, babu leaching, kuma babu gurɓata (misali, bioreactor, fermenters, tsarin tsarkakewa, layukan cika).
Rufewa mai juriya ga masu tsabtace sinadarai da tururi mai zafi da ake amfani da su a cikin tsarin CIP (Tsaftace-in- Wuri) da SIP (Sterilize-in-Place).
Masana'antar Abinci & Abin sha:
Hatimi don saduwa da kayan aiki FDA/USDA/EU dokokin tuntuɓar abinci (misali, kayan aiki, masu filaye, bututu).
Mai juriya ga kayan tsaftacewa-abinci da masu tsabtace tsabta.
Semiconductor & Masana'antar Lantarki:
Seals for ultrapure water (UPW) da high-tsarki sinadaran (acids, alkalis, kaushi) bayarwa da kuma tsarin kula, bukatar musamman low barbashi tsara da karfe ion leaching.
Hatimi don ɗakuna masu ɓarna da kayan aikin plasma (yana buƙatar ƙarancin fitar da gas).
Masana'antar Motoci:
Rufewa a wurare masu zafi kamar tsarin turbocharger da tsarin EGR.
Hatimin da ke buƙatar ƙananan juriya da juriya na sinadarai a cikin watsawa da tsarin mai.
Aikace-aikace a cikin sabon tsarin sanyaya baturi abin hawa makamashi.
Jirgin Sama & Tsaro:
Hatimin da ke buƙatar babban abin dogaro, matsananciyar juriya na zafin jiki, da juriya ga mai / ruwa na ruwa na musamman a cikin tsarin hydraulic, tsarin mai, da tsarin kula da muhalli.
Babban Masana'antu:
Hatimi don pneumatic da na'ura mai aiki da karfin ruwa na buƙatar ƙarancin juriya, tsawon rai, da juriya (musamman don babban saurin motsi mai maimaitawa).
Hatimi na bawuloli daban-daban, famfo, da masu haɗin kai masu buƙatar juriya na sinadarai da kaddarorin da ba na sanda ba.
Hatimi don kayan aikin motsa jiki (yana buƙatar ƙananan fitar da gas).
Fa'idodi na Musamman da Halayen Aiki
Babban fa'idar O-rings mai rufaffiyar PTFE ya ta'allaka ne a cikin ingantattun ayyukan haɗin gwiwar da aka samu daga tsarin su:
Na Musamman Rashin Ƙarfafa Sinadari:
Ɗaya daga cikin fa'idodin farko. PTFE yana nuna juriya ga kusan dukkanin sinadarai (ciki har da acid mai ƙarfi, alkalis mai ƙarfi, aqua regia, abubuwan kaushi na halitta, da sauransu), waɗanda galibin abubuwan roba ba za su iya cimma su kaɗai ba. Rubutun ya keɓance kafofin watsa labarai masu ɓarna yadda ya kamata daga tsakiyar roba na ciki, yana haɓaka kewayon aikace-aikacen O-ring a cikin matsanancin yanayin sinadarai.
Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarfafawa (CoF):
Amfani mai mahimmanci. PTFE yana da ɗayan mafi ƙanƙanta ƙimar CoF tsakanin sanannun kayan aiki (yawanci 0.05-0.1). Wannan yana sa rufaffen O-rings ya yi fice a aikace-aikacen rufewa mai ƙarfi (misali, sandunan fistan mai jujjuyawa, raƙuman juyawa):
Mahimmanci yana rage ɓarkewar ɓarna da gudu.
Yana rage zafi da lalacewa.
Yana haɓaka rayuwar hatimi (musamman a cikin aikace-aikacen sauri mai girma, mai girma).
Inganta tsarin makamashi yadda ya dace.
Faɗin Yanayin Zazzabi mai Aiki:
Rufin PTFE kanta yana kula da aiki a cikin kewayon zafin jiki mai faɗi sosai daga -200 ° C zuwa + 260 ° C ( ɗan gajeren lokaci har zuwa + 300 ° C). Wannan yana ƙara girman iyakar zafin jiki na tushe roba O-ring (misali, NBR tushe yawanci iyakance zuwa ~ 120 ° C, amma tare da PTFE shafi za a iya amfani da a mafi girma yanayin zafi, dangane da roba zaba). Hakanan ana tabbatar da aikin ƙarancin zafin jiki.
Kyawawan Abubuwan Kayayyakin da Ba Tsaya ba da Rashin Jiki:
PTFE yana da ƙarancin makamashi mai ƙarancin ƙarfi, yana mai da shi juriya sosai ga mannewa da rashin jika ta ruwa da ruwa na tushen mai. Wannan yana haifar da:
Rage ɓarna, coking, ko manne da ragowar kafofin watsa labarai akan saman rufewa.
Sauƙaƙan tsaftacewa, musamman dacewa da sassan tsafta kamar abinci da kantin magani.
Ci gaba da aikin hatimin hatimi ko da tare da kafofin watsa labarai masu danko.
Babban Tsafta da Ƙananan Leachables:
A santsi, m PTFE shafi surface minimizes da leaching na barbashi, Additives, ko low- kwayoyin-nauyi abubuwa. Wannan yana da mahimmanci don aikace-aikacen tsafta mai ɗorewa a cikin semiconductor, pharma, biotech, da abinci & abin sha, yadda ya kamata ke hana gurɓatar samfur.
Kyakkyawan juriya mai kyau:
Yayin da juriyar lalacewa ta PTFE ba ta da kyau, ƙarancin CoF ɗin sa yana rage ƙimar lalacewa sosai. Lokacin da aka haɗe shi da madaidaicin roba mai dacewa (samar da tallafi da juriya) da ƙarewa / lubrication da ya dace, O-zobba masu rufi gabaɗaya suna nuna mafi kyawun juriya fiye da ƙarar O-zoben roba a cikin aikace-aikace masu ƙarfi.
Ingantattun Juriya na Sinadarai na Rubber Substrate:
Rubutun yana kare tushen roba na ciki daga harin kafofin watsa labarai, yana ba da damar amfani da kayan roba tare da ingantattun kaddarorin halitta (kamar elasticity ko farashi, misali, NBR) a cikin kafofin watsa labarai waɗanda galibi zasu kumbura, taurare, ko lalata roba. Yana da kyau "makamai" na roba na roba tare da juriya na PTFE.
Kyakyawar Matsala:
Ƙwararren PTFE masu inganci suna da ƙima mai kyau da ƙananan ƙarancin fitarwa, haɗe tare da elasticity na ginshiƙan roba, yana samar da ingantacciyar ma'auni.
3.Muhimman Ra'ayi
Farashin: Ya fi daidaitattun O-ring na roba.
Bukatun shigarwa: Ana buƙatar kulawa da hankali don guje wa lalata rufin tare da kayan aiki masu kaifi. Wuraren shigarwa yakamata su kasance da isassun kyamarori na gubar da kuma ƙarewar ƙasa mai santsi.
Mutuncin Rufe: Ingantattun sutura (mannewa, daidaituwa, rashi ramuka) yana da mahimmanci. Idan rufin ya karya, robar da aka fallasa ya rasa ingantaccen juriyar sinadarai.
Saitin Matsi: Da farko ya dogara da zaɓaɓɓen kayan roba. Rufin kanta baya samar da juriya mai matsawa.
Rayuwar Sabis Mai Sauƙi: Yayin da ya fi na roba mara kyau, rufin zai ƙare a ƙarshe ƙarƙashin tsayin daka, mai tsanani ko motsin juyawa. Zaɓin ƙarin rubbers masu jure lalacewa (misali, FKM) da ingantaccen ƙira na iya tsawaita rayuwa.
Takaitawa
Babban darajar PTFE mai rufaffiyar O-zobba ta ta'allaka ne akan yadda murfin PTFE ke ba da ƙarancin ƙarancin sinadarai, ƙarancin ƙarancin juzu'i, kewayon zafin jiki mai faɗi, kaddarorin da ba na sanda ba, tsafta mai ƙarfi, da kariya ta ƙasa zuwa zoben roba na gargajiya. Su ne ingantacciyar mafita don neman ƙalubalen rufewa da suka haɗa da lalata mai ƙarfi, tsafta mai ƙarfi, ƙarancin juzu'i, da faɗin zafin jiki. Lokacin zabar, yana da mahimmanci don zaɓar abin da ya dace na roba substrate da ƙayyadaddun shafi dangane da takamaiman aikace-aikacen (kafofin watsa labaru, zafin jiki, matsa lamba, tsauri / a tsaye), da tabbatar da ingantaccen shigarwa da kiyayewa don adana amincin shafi da aikin rufewa.
Teburin da ke ƙasa yana taƙaita mahimman halaye da aikace-aikacen O-rings masu rufaffiyar PTFE:
