Don dakatar da lubricating mai daga zubowa, da shigowar kayan waje, ana ɗaure murfin annular da aka yi da ɗaya ko fiye a kan zobe ɗaya ko wanki na ɗaki sannan a tuntuɓi wani zobe ko wanki, wanda ke haifar da ɗan ƙaramin gibi da aka sani da labyrinth. Zoben roba tare da sashin giciye madauwari suna yin zoben rufewa. An san shi da zoben rufewa mai siffa O saboda sashin giciye mai siffar O.

1. NBR nitrile roba sealing zobe

Ana iya amfani da ruwa, man fetur, man shafawa na siliki, man silicone, man lubricating na diester, man hydraulic mai tushen mai, da sauran kafofin watsa labarai da shi. A yanzu, shi ne mafi ƙarancin tsada kuma mafi yawan amfani da hatimin roba. Ba a ba da shawarar yin amfani da abubuwan kaushi na polar kamar chloroform, nitrohydrocarbons, ketones, ozone, da MEK. Matsakaicin zafin jiki na aiki shine -40 zuwa 120 ° C.

2. HNBR hydrogenated nitrile roba sealing zobe

Yana da kyakkyawan juriya ga ozone, hasken rana, da yanayi, kuma yana da matukar juriya ga lalata, rips, da nakasar matsawa. Babban karko idan aka kwatanta da roba na nitrile. Mafi dacewa don tsaftace injin mota da sauran kayan aiki. Ba a ba da shawarar yin amfani da wannan tare da maganin aromatics, alcohols, ko esters ba. Matsakaicin zafin jiki na aiki shine -40 zuwa 150 ° C.

3. SIL silicone rubber sealing zobe

Kyakkyawan juriya ga zafi, sanyi, ozone, da tsufa na yanayi yana mallakar ta. yana da insulating halaye masu kyau. Ba shi da juriyar mai, kuma ƙarfin ƙarfinsa ya yi ƙasa da na roba na yau da kullun. Mafi dacewa don amfani tare da na'urorin wutar lantarki, ƙarfe na lantarki, tanda microwave, da sauran kayan aikin gida. Hakanan ya dace da abubuwa iri-iri, irin su maɓuɓɓugar ruwa da tankuna, waɗanda ke haɗuwa da fatar ɗan adam. Ba a ba da shawarar yin amfani da sodium hydroxide, mai, mai da hankali acid, ko mafi yawan kaushi mai ƙarfi ba. Matsakaicin zafin jiki don aiki na yau da kullun shine -55 ~ 250 ° C.

4. VITON fluorine roba sealing zobe

Yanayinsa na musamman, ozone, da juriya na sinadarai sun yi daidai da mafi girman juriyar zafinsa; duk da haka, juriyarsa sanyi ne subpar. Yawancin mai da kaushi, musamman acid, aliphatic da aromatic hydrocarbons, da kayan lambu da dabbobi mai, ba su shafar shi. Mafi dacewa don tsarin mai, wuraren sinadarai, da buƙatun rufe injin dizal. Yi amfani da ketones, ƙananan esters masu nauyi, da gaurayawan da ke ɗauke da nitrates ba a ba su shawarar ba. -20 zuwa 250 °C shine yanayin zafin aiki na yau da kullun.

5. FLS fluorosilicone rubber sealing zobe

Ayyukansa sun haɗu da mafi kyawun halayen silicone da roba na fluorine. Hakanan yana da matukar juriya ga kaushi, mai, mai girma da ƙarancin zafi, da mai. mai iya jure gurɓacewar sinadarai da suka haɗa da iskar oxygen, abubuwan kaushi da ke ɗauke da sinadarin hydrocarbons, da sauran abubuwan da ke ɗauke da chlorine. -50 ~ 200 °C shine yanayin zafin aiki na yau da kullun.

6. EPDM EPDM roba sealing zobe

Yana da juriya da ruwa, juriyar sinadarai, juriya na ozone, da jure yanayi. Yana aiki da kyau don rufe aikace-aikacen da suka haɗa da barasa da ketones da kuma tururin ruwa mai zafi. Matsakaicin zafin jiki don aiki shine -55 zuwa 150 ° C.

7. CR neoprene sealing zobe

Yana da juriya musamman ga yanayi da hasken rana. Yana da juriya ga diluted acid da silicone man lubricants, kuma ba ya tsoron refrigerants kamar dichlorodifluoromethane da ammonia. A gefe guda, yana faɗaɗa mahimmanci a cikin mai mai ma'adinai tare da ƙananan maki aniline. Ƙananan yanayin zafi yana sa crystallization da taurin mai sauƙi. Ya dace da kewayon yanayi, hasken rana, da yanayin da aka fallasa yanayin sararin samaniya da kuma kewayon haɗin haɗin sinadarai da juriya na harshen wuta. Yi amfani da acid mai ƙarfi, nitrohydrocarbons, esters, mahadi na ketone, da chloroform ba a ba da shawarar ba. Matsakaicin zafin jiki don aiki shine -55 zuwa 120 ° C.

8. IIR butyl rubber sealing zobe

Yana aiki da kyau musamman dangane da matsananciyar iska, juriya na zafi, juriya na UV, juriya na lemar sararin samaniya, da rufi; Bugu da ƙari, yana iya jure wa abubuwan da za su iya yin oxidizable da mai na dabba da kayan lambu kuma yana da kyakkyawar juriya ga kaushi na polar ciki har da alcohols, ketones, da esters. Ya dace da injin tsabtace ruwa ko kayan juriya na sinadarai. Ba a ba da shawarar yin amfani da shi da kananzir, kamshi na hydrocarbons, ko kaushi mai. -50 zuwa 110 °C shine yanayin zafin aiki na yau da kullun.

9. ACM acrylic roba sealing zobe

Juriyar yanayin sa, juriyar mai, da nakasar matsawa duk sun ɗan yi ƙasa da matsakaita, duk da haka ƙarfin injinsa, juriyar ruwansa, da ƙarfin zafinsa duk suna da kyau. Yawanci ana samunsu a tsarin tuƙin wuta da tsarin akwatin kaya na motoci. Ba a ba da shawarar yin amfani da ruwan birki, ruwan zafi, ko phosphate esters ba. Matsakaicin zafin jiki na aiki shine -25 zuwa 170 ° C.

10. NR na halitta roba sealing zobe

Kayayyakin roba suna da ƙarfi a kan tsagewa, haɓakawa, lalacewa, da haɓakawa. Yana yi, duk da haka, ya tsufa cikin iska, yana tsayawa lokacin zafi, yana faɗaɗa da sauri, ya narke a cikin man ma'adinai ko man fetur, kuma yana jurewa acid mai laushi amma ba alkali mai ƙarfi ba. Ya dace don amfani a cikin ruwaye tare da ions hydroxyl, irin su ethanol da ruwan birki na mota. -20 zuwa 100 °C shine yanayin yanayin aiki na yau da kullun.

11. PU polyurethane roba sealing zobe

Rubber polyurethane yana da kyawawan halayen injiniya; ya zarce sauran robar ta fuskar juriya da juriya mai tsayi. Juriyarsa ga tsufa, ozone, da mai shima yana da kyau kwarai; amma, a yanayin zafi mai yawa, yana da sauƙi ga hydrolysis. Yawanci ana amfani da shi don haɗa haɗin gwiwa wanda zai iya jure lalacewa da matsa lamba. Matsakaicin zafin jiki na aiki shine -45 zuwa 90 ° C.