Domin hana mai zuba mai daga zubewa da kuma abubuwan waje shiga, ana ɗaure murfin annular da aka yi da ɗaya ko fiye da abubuwa a kan zobe ɗaya ko na'urar wanki na bearing ɗin kuma ya taɓa wani zobe ko na'urar wanki, yana haifar da ƙaramin gibi da aka sani da labyrinth. Zoben roba masu siffar giciye mai zagaye suna yin zoben rufewa. An san shi da zoben rufewa mai siffar O saboda sashin giciye mai siffar O.

1. Zoben rufe roba na nitrile na NBR

Ruwa, fetur, man shafawa na silicone, man silicone, man shafawa na diester, man hydraulic na man fetur, da sauran hanyoyin sadarwa duk ana iya amfani da su. A yanzu, shi ne mafi ƙarancin tsada kuma mafi yawan amfani da shi. Ba a ba da shawarar amfani da shi tare da sinadarai masu narkewa kamar chloroform, nitrohydrocarbons, ketones, ozone, da MEK ba. Matsakaicin zafin jiki don aiki shine -40 zuwa 120 °C.

2. Zoben rufe roba mai nitrile mai hydrogenated HNBR

Yana da juriya mai kyau ga ozone, hasken rana, da yanayi, kuma yana da juriya sosai ga tsatsa, tsagewa, da nakasawar matsewa. Yana da ƙarfi sosai idan aka kwatanta da robar nitrile. Ya dace da tsaftace injunan mota da sauran kayan aiki. Ba a ba da shawarar amfani da shi tare da maganin ƙanshi, barasa, ko esters ba. Matsakaicin zafin aiki shine -40 zuwa 150 °C.

3. Zoben rufe roba na silikon SIL

Yana da kyakkyawan juriya ga zafi, sanyi, ozone, da tsufa a yanayi. Yana da kyawawan halaye na rufewa. Ba ya jure wa mai, kuma ƙarfinsa ya yi ƙasa da na roba na yau da kullun. Ya dace da amfani da na'urorin dumama ruwa na lantarki, ƙarfe na lantarki, tanda na microwave, da sauran kayan aikin gida. Hakanan ya dace da abubuwa iri-iri, kamar maɓuɓɓugan ruwa da kettles, waɗanda suka taɓa fatar ɗan adam. Ba a ba da shawarar amfani da sodium hydroxide, mai, acid mai ƙarfi, ko mafi yawan abubuwan narkewa masu ƙarfi ba. Yanayin zafin jiki don aiki na yau da kullun shine -55~250 °C.

4. Zoben rufe roba mai suna VITON fluorine

Yanayinsa na musamman, ozone, da kuma juriyar sinadarai sun yi daidai da juriyar zafinsa mai girma; duk da haka, juriyar sanyi ba ta da yawa. Yawancin mai da abubuwan narkewa, musamman acid, aliphatic da aromatic hydrocarbons, da kuma man kayan lambu da na dabbobi, ba sa shafar sa. Ya dace da tsarin mai, wuraren sinadarai, da buƙatun rufe injin dizal. Ba a ba da shawarar amfani da shi tare da ketones, esters masu ƙarancin nauyin kwayoyin halitta, da gauraye masu ɗauke da nitrates ba. -20 zuwa 250 °C shine kewayon zafin aiki na yau da kullun.

5. Zoben rufe roba na FLS fluorosilicon

Aikinsa ya haɗa da mafi kyawun halaye na robar silicone da fluorine. Hakanan yana da juriya sosai ga sinadarai masu narkewa, mai, zafi mai yawa da ƙasa, da mai. yana iya jure wa lalacewar sinadarai, gami da iskar oxygen, sinadarai masu narkewa waɗanda ke ɗauke da hydrocarbons masu ƙamshi, da sinadarai masu narkewa waɗanda ke ɗauke da chlorine. -50~200 °C shine matsakaicin zafin aiki.

6. Zoben rufe roba na EPDM EPDM

Yana jure wa ruwa, yana jure wa sinadarai, yana jure wa ozone, kuma yana jure wa yanayi. Yana aiki sosai don rufewa da ya shafi barasa da ketones da kuma tururin ruwa mai zafi. Matsakaicin zafin aiki shine -55 zuwa 150 °C.

7. Zoben rufewa na CR neoprene

Yana da juriya musamman ga yanayi da hasken rana. Yana da juriya ga acid da aka narkar da shi da man shafawa na silicone, kuma baya tsoron refrigerants kamar dichlorodifluoromethane da ammonia. A gefe guda kuma, yana faɗaɗa sosai a cikin man ma'adinai masu ƙarancin maki aniline. Ƙananan zafin jiki suna sa crystallization da taurarewa su zama masu sauƙi. Ya dace da yanayi daban-daban na yanayi, hasken rana, da ozone da kuma ga nau'ikan haɗin rufewa masu juriya ga sinadarai da harshen wuta. Ba a ba da shawarar amfani da shi tare da acid mai ƙarfi, nitrohydrocarbons, esters, ketone mahadi, da chloroform ba. Matsakaicin zafin jiki don aiki shine -55 zuwa 120 °C.

8. Zoben rufe roba na IIR butyl

Yana aiki sosai musamman dangane da matsewar iska, juriyar zafi, juriyar UV, juriyar ozone, da kuma rufin gida; bugu da ƙari, yana iya jure wa abubuwan da za a iya sawa su zama iska da man dabbobi da kayan lambu kuma yana da juriya mai kyau ga abubuwan da ke narkewa a cikin polar ciki har da barasa, ketones, da esters. Ya dace da kayan aikin jurewar injin ko sinadarai. Ba a ba da shawarar amfani da shi tare da kerosene, hydrocarbons masu ƙanshi, ko masu narkewar mai ba. -50 zuwa 110 °C shine yanayin zafin aiki na yau da kullun.

9. Zoben rufewa na roba na ACM acrylic

Juriyarsa ta yanayi, juriyar mai, da kuma saurin nakasa matsi duk sun yi ƙasa da matsakaici, duk da haka ƙarfin injinsa, juriyar ruwa, da juriyar zafin jiki mai yawa duk suna da kyau. Yawanci ana samunsa a cikin tsarin tuƙi da tsarin gearbox na motoci. Ba a ba da shawarar amfani da shi tare da ruwan birki, ruwan zafi, ko esters na phosphate ba. Matsakaicin zafin jiki don aiki shine -25 zuwa 170 °C.

10. Zoben rufe roba na halitta na NR

Kayayyakin roba suna da ƙarfi wajen hana tsagewa, tsawaitawa, lalacewa, da kuma sassautawa. Duk da haka, yana tsufa da sauri a cikin iska, yana mannewa idan aka dumama shi, yana faɗaɗa cikin sauƙi, yana narkewa a cikin man ma'adinai ko fetur, kuma yana jure wa acid mai laushi amma ba mai ƙarfi ba. Ya dace da amfani a cikin ruwa mai ɗauke da ions na hydroxyl, irin wannan ethanol da ruwan birki na mota. -20 zuwa 100 °C shine yanayin zafin aiki na yau da kullun.

11. Zoben rufe robar polyurethane ta PU

Robar polyurethane tana da kyawawan halaye na injiniya; tana yin fice fiye da sauran robar wajen juriyar lalacewa da juriyar matsin lamba mai yawa. Haka nan juriyarta ga tsufa, ozone, da mai tana da kyau sosai; amma, a yanayin zafi mai yawa, tana da sauƙin kamuwa da ruwa. Ana amfani da ita galibi don haɗa haɗin rufewa waɗanda za su iya jure lalacewa da matsin lamba mai yawa. Matsakaicin zafin jiki don aiki shine -45 zuwa 90 °C.