Mphete Yokutidwa ndi PTFE
Kodi PTFE Coated O-Rings ndi chiyani?
Mphete za O-zokutidwa ndi PTFE ndi zomatira zophatikizika zomwe zimakhala ndi maziko a mphira wa O-ring (monga NBR, FKM, EPDM, VMQ) ngati gawo lotanuka, pomwe filimu yopyapyala, yofanana, komanso yolimba ya polytetrafluoroethylene (PTFE) imagwiritsidwa ntchito. Kapangidwe kameneka kamaphatikiza ubwino wa zipangizo zonse ziwiri, zomwe zimapangitsa kuti zikhale ndi mawonekedwe apadera.
Madera Ofunikira Ogwiritsira Ntchito
Chifukwa cha makhalidwe awo abwino, mphete za O-coated ndi PTFE zimagwiritsidwa ntchito kwambiri m'malo ovuta okhala ndi zofunikira zapadera zotsekera:
Makampani Ogulitsa Mankhwala ndi Mafuta:
Ma valve otseka, mapampu, ma reactor, ndi ma flange a mapaipi omwe amagwira ntchito zowononga kwambiri monga ma acid amphamvu, ma alkali amphamvu, ma oxidizer amphamvu, ndi zosungunulira zachilengedwe.
Kutseka mu makina operekera mankhwala oyera kwambiri kuti mupewe kuipitsidwa.
Makampani Opanga Mankhwala ndi Zamoyo:
Kutseka zida zogwirira ntchito zomwe zimafuna ukhondo wambiri, osatulutsa madzi, komanso osadetsa (monga bioreactors, fermenters, makina oyeretsera, mizere yodzaza).
Kutseka kosagonjetsedwa ndi zotsukira za mankhwala zoopsa komanso nthunzi yotentha kwambiri yomwe imagwiritsidwa ntchito mu njira za CIP (Clean-in-Place) ndi SIP (Sterilize-in-Place).
Makampani Ogulitsa Zakudya ndi Zakumwa:
Zisindikizo za zida zomwe zikukwaniritsa malamulo a FDA/USDA/EU okhudzana ndi chakudya (monga zida zopangira, zodzaza, mapaipi).
Yosagwira ntchito ndi mankhwala oyeretsera ndi ophera tizilombo toyambitsa matenda omwe amaperekedwa pa chakudya.
Makampani Opanga Ma Semiconductor ndi Zamagetsi:
Zisindikizo za madzi oyera kwambiri (UPW) ndi mankhwala oyeretsera (ma acid, alkalis, solvents) zomwe zimafuna kupanga ndi kusamalira tinthu tating'onoting'ono tochepa kwambiri komanso kutulutsa ma ion achitsulo.
Zisindikizo za zipinda zotsukira mpweya ndi zida zotsukira madzi a m'magazi (zofuna mpweya wochepa).
Makampani Ogulitsa Magalimoto:
Kutseka m'malo otentha kwambiri monga makina a turbocharger ndi makina a EGR.
Zisindikizo zomwe zimafuna kukanikizana kochepa komanso kukana mankhwala m'ma transmission ndi machitidwe amafuta.
Kugwiritsa ntchito mu makina atsopano oziziritsira mabatire a magalimoto amphamvu.
Ndege ndi Chitetezo:
Zisindikizo zomwe zimafuna kudalirika kwambiri, kukana kutentha kwambiri, komanso kukana mafuta apadera/madzimadzi amadzimadzi m'makina a hydraulic, makina amafuta, ndi makina owongolera zachilengedwe.
Makampani Onse:
Zisindikizo za masilinda a pneumatic ndi hydraulic zomwe zimafuna kukangana kochepa, kukhala nthawi yayitali, komanso kukana kuwonongeka (makamaka pakuyenda mofulumira kwambiri komanso pafupipafupi kwambiri).
Zisindikizo za ma valve, mapampu, ndi zolumikizira zosiyanasiyana zomwe zimafuna kukana mankhwala komanso mphamvu zosamatira.
Zisindikizo za zida zotsukira mpweya (zofuna mpweya wochepa).
Ubwino Wapadera ndi Makhalidwe Abwino
Ubwino waukulu wa mphete za O-coated ndi PTFE uli mu magwiridwe antchito opangidwa kuchokera ku kapangidwe kake:
Kusagwira Ntchito Kwapadera kwa Mankhwala:
Chimodzi mwa zabwino zazikulu. PTFE imalimbana kwambiri ndi mankhwala onse (kuphatikizapo ma asidi amphamvu, ma alkali amphamvu, aqua regia, zosungunulira zachilengedwe, ndi zina zotero), zomwe zinthu zambiri za rabara sizingathe kuchita zokha. Chophimbacho chimachotsa bwino zinthu zowononga kuchokera mkati mwa rabara, ndikukulitsa kwambiri mtundu wa O-ring yomwe imagwiritsidwa ntchito m'malo ovuta kwambiri a mankhwala.
Koyefifiti Yotsika Kwambiri ya Kukangana (CoF):
Ubwino wofunikira. PTFE ili ndi imodzi mwa mitengo yotsika kwambiri ya CoF pakati pa zinthu zolimba zodziwika bwino (nthawi zambiri 0.05-0.1). Izi zimapangitsa kuti mphete za O-coated zikhale zabwino kwambiri mu ntchito zotsekera zamphamvu (monga ndodo zobwezera za piston, ma rotating shafts):
Amachepetsa kwambiri kusweka ndi kugwedezeka kwa kuthamanga.
Amachepetsa kutentha ndi kuwonongeka komwe kumabwera chifukwa cha kukangana.
Zimawonjezera nthawi yogwira ntchito ya seal (makamaka pa ntchito zothamanga kwambiri komanso pafupipafupi).
Zimathandiza kuti mphamvu zamagetsi zizigwira ntchito bwino.
Kuchuluka kwa Kutentha kwa Ntchito:
Chophimba cha PTFE chokha chimasunga magwiridwe antchito pa kutentha kwakukulu kwambiri kuyambira -200°C mpaka +260°C (kwakanthawi kochepa mpaka +300°C). Izi zimakulitsa kwambiri kutentha kwapamwamba kwa mphete ya O-ring ya rabara (monga, maziko a NBR nthawi zambiri amakhala ochepa mpaka ~120°C, koma ndi chophimba cha PTFE chingagwiritsidwe ntchito pa kutentha kwakukulu, kutengera rabara yomwe yasankhidwa). Kuchita bwino kwa kutentha kochepa kumatsimikiziridwanso.
Kapangidwe Kabwino Kwambiri Kosamamatira ndi Kosanyowa:
PTFE ili ndi mphamvu yochepa kwambiri pamwamba, zomwe zimapangitsa kuti ikhale yolimba kwambiri kuti isamamatire komanso kuti isanyowe ndi madzi ndi madzi ochokera ku mafuta. Izi zimapangitsa kuti:
Kuchepetsa kuipitsidwa, kuphwanyika, kapena kumamatira kwa zotsalira za media pamalo otsekera.
Kuyeretsa kosavuta, makamaka koyenera magawo aukhondo monga chakudya ndi mankhwala.
Kusunga magwiridwe antchito otseka ngakhale ndi media yokhuthala.
Ukhondo Wapamwamba ndi Zosalowa Madzi:
Chophimba cha PTFE chosalala komanso chokhuthala chimachepetsa kutuluka kwa tinthu tating'onoting'ono, zowonjezera, kapena zinthu zolemera pang'ono. Izi ndizofunikira kwambiri pakugwiritsa ntchito zinthu zoyera kwambiri mu semiconductors, pharma, biotech, ndi chakudya ndi zakumwa, zomwe zimathandiza kupewa kuipitsidwa kwa zinthuzo.
Kukana Kuvala Bwino:
Ngakhale kuti PTFE siigwira bwino ntchito, CoF yake yotsika kwambiri imachepetsa kwambiri kuchuluka kwa kuwonongeka. Ikaphatikizidwa ndi gawo loyenera la rabara (lopereka chithandizo ndi kulimba) komanso kumalizidwa koyenera/kudzola, mphete za O zophimbidwa nthawi zambiri zimakhala ndi kukana bwino kuwonongeka kuposa mphete za O-rabala zopanda kanthu mu ntchito yosinthika.
Kukana Kwambiri kwa Mankhwala a Pansi pa Mphira:
Chophimbacho chimateteza pakati pa mphira wamkati ku ziwopsezo za media, zomwe zimathandiza kugwiritsa ntchito zipangizo za mphira zokhala ndi makhalidwe abwino (monga kusinthasintha kapena mtengo, mwachitsanzo, NBR) mu media zomwe nthawi zambiri zimatupa, kulimbitsa, kapena kuwononga mphira. "Zimateteza" kusinthasintha kwa mphira ndi kukana kwa mankhwala kwa PTFE.
Kugwirizana Kwabwino kwa Vacuum:
Zophimba za PTFE zapamwamba kwambiri zimakhala ndi kukhuthala kwabwino komanso mpweya wochepa, kuphatikiza ndi kulimba kwa pakati pa rabara, zomwe zimapangitsa kuti vacuum itseke bwino.
3. Zofunika Kuziganizira
Mtengo: Wokwera kuposa mphete za rabara wamba.
Zofunikira pa Kuyika: Muyenera kusamalira mosamala kuti musawononge chophimbacho ndi zida zakuthwa. Mizere yoyika iyenera kukhala ndi ma chamfer okwanira komanso malo osalala.
Kulimba kwa Chophimba: Ubwino wa chophimbacho (kumatira, kufanana, kusakhala ndi mabowo a pinhole) ndikofunikira kwambiri. Ngati chophimbacho chasweka, rabara yomwe yawonekera imataya mphamvu zake zotsutsana ndi mankhwala.
Seti Yopondereza: Zimadalira kwambiri gawo la rabara lomwe mwasankha. Chophimbacho sichimapereka mphamvu yopondereza.
Moyo Wogwira Ntchito Mosinthasintha: Ngakhale kuti ndi wapamwamba kwambiri kuposa rabala wopanda kanthu, chophimbacho chidzatha pakapita nthawi yayitali, mozungulira kwambiri kapena mozungulira. Kusankha rabala zoyambira zosatha (monga FKM) ndi kapangidwe kabwino kungathandize kuti nthawi ikhale yogwira ntchito.
Chidule
Phindu lalikulu la mphete za PTFE zophimbidwa ndi PTFE lili mu momwe chophimba cha PTFE chimaperekera kusakhala ndi mankhwala okwanira, kusagwirizana kochepa kwambiri, kutentha kwakukulu, makhalidwe osamamatira, ukhondo wapamwamba, ndi chitetezo cha substrate ku mphete zachikhalidwe za raba za O. Ndi njira yabwino yothetsera mavuto ovuta otseka omwe amakhudza dzimbiri lamphamvu, ukhondo wapamwamba, kusagwirizana kochepa, ndi kutentha kwakukulu. Posankha, ndikofunikira kusankha zinthu zoyenera za raba ndi zophimba kutengera momwe zimagwiritsidwira ntchito (media, temperature, pressure, dynamic/static), ndikuwonetsetsa kuti kuyika ndi kukonza koyenera kuti kusunge umphumphu wa chophimba ndi magwiridwe antchito otseka.
Gome ili m'munsimu likufotokoza mwachidule makhalidwe ofunikira ndi momwe ma O-rings okhala ndi PTFE amagwiritsidwira ntchito:
