{"id":1814,"date":"2026-02-13T12:31:35","date_gmt":"2026-02-13T12:31:35","guid":{"rendered":"https:\/\/www.wonzh.com\/?p=1814"},"modified":"2026-02-13T12:32:51","modified_gmt":"2026-02-13T12:32:51","slug":"nbr-vs-fkm-viton-tiivisteet-kemiallinen-kestavyys-ja-kayttoian-analyysi","status":"publish","type":"post","link":"https:\/\/www.wonzh.com\/fi\/nbr-vs-fkm-viton-seals-chemical-resistance-and-service-life-analysis\/","title":{"rendered":"NBR vs. FKM (Viton) -tiivisteet: Kemiallinen kest\u00e4vyys ja k\u00e4ytt\u00f6i\u00e4n analyysi"},"content":{"rendered":"

Tiivisteet ovat ratkaisevassa asemassa hydraulisissa, pneumaattisissa ja kemiallisissa j\u00e4rjestelmiss\u00e4, sill\u00e4 ne est\u00e4v\u00e4t nestevuotoja ja yll\u00e4pit\u00e4v\u00e4t j\u00e4rjestelm\u00e4n suorituskyky\u00e4. Yleisi\u00e4 elastomeerimateriaaleja ovat mm, NBR (nitriilibutadieenikumi)<\/strong> ja FKM (Viton)<\/strong> ovat laajalti k\u00e4yt\u00f6ss\u00e4. Niiden kemiallisen yhteensopivuuden, l\u00e4mp\u00f6tilojen sietokyvyn ja k\u00e4ytt\u00f6i\u00e4n ymm\u00e4rt\u00e4minen auttaa insin\u00f6\u00f6rej\u00e4 valitsemaan oikean tiivisteen teollisiin sovelluksiin.<\/p>\n\n\n\n

1. Materiaaliominaisuuksien yleiskatsaus<\/h2>\n\n\n\n

NBR (nitriilibutadieenikumi)<\/strong>:<\/p>\n\n\n\n

    \n
  • Erinomainen kest\u00e4vyys \u00f6ljypohjaisia \u00f6ljyj\u00e4, rasvoja ja polttoaineita vastaan.<\/li>\n\n\n\n
  • K\u00e4ytt\u00f6l\u00e4mp\u00f6tila: -40\u00b0C - 120\u00b0C<\/li>\n\n\n\n
  • Kustannustehokas ja laajalti saatavilla<\/li>\n\n\n\n
  • Kohtalainen kemiallinen kest\u00e4vyys happoja, em\u00e4ksi\u00e4 ja liuottimia vastaan.<\/li>\n<\/ul>\n\n\n\n

    FKM (Viton)<\/strong>:<\/p>\n\n\n\n

      \n
    • Fluorihiilielastomeeri, jolla on erinomainen kemiallinen kest\u00e4vyys<\/li>\n\n\n\n
    • K\u00e4ytt\u00f6l\u00e4mp\u00f6tila: -20\u00b0C - 250\u00b0C<\/li>\n\n\n\n
    • Kest\u00e4\u00e4 aggressiivisia kemikaaleja, korkeita l\u00e4mp\u00f6tiloja ja otsonia.<\/li>\n\n\n\n
    • Korkeammat kustannukset kuin NBR<\/li>\n<\/ul>\n\n\n\n

      2. Kemiallisen kest\u00e4vyyden vertailu<\/h2>\n\n\n\n
      Kemiallinen \/ Media<\/th>NBR<\/th>FKM (Viton)<\/th><\/tr><\/thead>
      Maa\u00f6ljyt ja polttoaineet<\/td>Erinomainen<\/td>Erinomainen<\/td><\/tr>
      Hydraulinesteet<\/td>Erinomainen<\/td>Erinomainen<\/td><\/tr>
      Hapot ja em\u00e4kset<\/td>Kohtalainen<\/td>Erinomainen<\/td><\/tr>
      Liuottimet ja kemikaalit<\/td>Rajoitettu<\/td>Erinomainen<\/td><\/tr>
      Otsoni & UV<\/td>Kohtalainen<\/td>Erinomainen<\/td><\/tr>
      Vesi ja h\u00f6yry<\/td>Kohtalainen<\/td>Korkea<\/td><\/tr>
      L\u00e4mp\u00f6tilan \u00e4\u00e4riarvot<\/td>-40\u00b0C - 120\u00b0C<\/td>-20\u00b0C - 250\u00b0C<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

      Engineering Insight:<\/strong>
      NBR on ihanteellinen tavanomaisiin hydraulisiin ja \u00f6ljypohjaisiin sovelluksiin. FKM-tiivisteet ovat erinomaisia korkeissa l\u00e4mp\u00f6tiloissa ja aggressiivisissa kemiallisissa ymp\u00e4rist\u00f6iss\u00e4, joissa NBR saattaa hajota.<\/p>\n\n\n\n

      3. Kuormitukseen ja k\u00e4ytt\u00f6ik\u00e4\u00e4n liittyv\u00e4t n\u00e4k\u00f6kohdat<\/h2>\n\n\n\n
        \n
      • NBR-tiivisteet<\/strong>: Riitt\u00e4v\u00e4 matalan ja kohtalaisen paineen j\u00e4rjestelmiin; k\u00e4ytt\u00f6ik\u00e4 voi lyhenty\u00e4 korkeissa l\u00e4mp\u00f6tiloissa tai kemiallisesti aggressiivisissa ymp\u00e4rist\u00f6iss\u00e4.<\/li>\n\n\n\n
      • FKM-tiivisteet<\/strong>: Soveltuu korkeapaineisiin, korkeisiin l\u00e4mp\u00f6tiloihin ja kemiallisesti aggressiivisiin j\u00e4rjestelmiin; pidempi k\u00e4ytt\u00f6ik\u00e4 minimaalisella huollolla.<\/li>\n<\/ul>\n\n\n\n

        K\u00e4ytt\u00f6ik\u00e4\u00e4n vaikuttavia tekij\u00f6it\u00e4 ovat muun muassa k\u00e4ytt\u00f6l\u00e4mp\u00f6tila, kemiallinen altistuminen, paine, dynaaminen liike ja asennuksen laatu.<\/p>\n\n\n\n

        4. Sovellukset<\/h2>\n\n\n\n

        NBR-tiivisteet<\/strong>:<\/p>\n\n\n\n

          \n
        • Vakiohydrauliset sylinterit ja pumput<\/li>\n\n\n\n
        • Autojen polttoaine- ja \u00f6ljyj\u00e4rjestelm\u00e4t<\/li>\n\n\n\n
        • Yleisk\u00e4ytt\u00f6iset teollisuuskoneet<\/li>\n\n\n\n
        • Kohtalainen l\u00e4mp\u00f6tila ja kemiallinen altistuminen ymp\u00e4rist\u00f6iss\u00e4<\/li>\n<\/ul>\n\n\n\n

          FKM (Viton) -tiivisteet<\/strong>:<\/p>\n\n\n\n

            \n
          • Korkean l\u00e4mp\u00f6tilan hydrauliset ja pneumaattiset j\u00e4rjestelm\u00e4t<\/li>\n\n\n\n
          • Kemialliset k\u00e4sittelylaitokset ja aggressiivisten aineiden k\u00e4sittely<\/li>\n\n\n\n
          • Auto- ja avaruusteollisuuden moottorit, jotka altistuvat korkealle l\u00e4mm\u00f6lle ja nesteille.<\/li>\n\n\n\n
          • Ulkona tai ankarissa ymp\u00e4rist\u00f6olosuhteissa<\/li>\n<\/ul>\n\n\n\n

            5. Kustannusn\u00e4k\u00f6kohdat<\/h2>\n\n\n\n
              \n
            • NBR: alhaisemmat materiaalikustannukset, soveltuu useimpiin yleisk\u00e4ytt\u00f6isiin sovelluksiin.<\/li>\n\n\n\n
            • FKM: Korkeammat alkukustannukset, mutta pidempi k\u00e4ytt\u00f6ik\u00e4 ja ylivoimainen kemikaalien kest\u00e4vyys v\u00e4hent\u00e4v\u00e4t k\u00e4ytt\u00f6katkoksia ja vaihtotiheytt\u00e4 vaativissa ymp\u00e4rist\u00f6iss\u00e4.<\/li>\n<\/ul>\n\n\n\n

              Elinkaaren kokonaiskustannukset<\/strong> suosii usein FKM:\u00e4\u00e4 korkeissa l\u00e4mp\u00f6tiloissa, korkeissa paineissa tai kemiallisesti aggressiivisissa sovelluksissa korkeammista alkuinvestoinneista huolimatta.<\/p>\n\n\n\n

              P\u00e4\u00e4telm\u00e4<\/h2>\n\n\n\n
                \n
              • NBR-tiivisteet<\/strong>: Kustannustehokas ja soveltuu \u00f6ljypohjaisiin \u00f6ljyihin, tavallisiin hydraulij\u00e4rjestelmiin ja kohtalaisiin olosuhteisiin.<\/li>\n\n\n\n
              • FKM (Viton) -tiivisteet<\/strong>: Erinomainen kemikaalien kest\u00e4vyys, korkean l\u00e4mp\u00f6tilan sietokyky ja pitk\u00e4 k\u00e4ytt\u00f6ik\u00e4, ihanteellinen aggressiivisiin ja vaativiin sovelluksiin.<\/li>\n<\/ul>\n\n\n\n

                Sopivan tiivistysmateriaalin valinnalla varmistetaan j\u00e4rjestelm\u00e4n luotettavuus, huollon v\u00e4hent\u00e4minen ja k\u00e4ytt\u00f6i\u00e4n pident\u00e4minen.<\/strong> teollisuusymp\u00e4rist\u00f6iss\u00e4.<\/p>","protected":false},"excerpt":{"rendered":"

                Seals play a critical role in hydraulic, pneumatic, and chemical systems, preventing fluid leakage and maintaining system performance. Among common elastomeric materials, NBR (Nitrile Butadiene Rubber) and FKM (Viton) are widely used. Understanding their chemical compatibility, temperature tolerance, and lifespan helps engineers select the right seal for industrial applications. 1. Material Properties Overview NBR (Nitrile […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[26],"tags":[1194,1190,1193,838,1070,839,1188,1086,1006,1189,844,1192,1082,837,1191],"class_list":["post-1814","post","type-post","status-publish","format-standard","hentry","category-product-knowledge","tag-automotive-seal","tag-chemical-processing-seal","tag-chemical-resistant-seal-2","tag-dynamic-sealing","tag-elastomer-seal","tag-fkm-seal","tag-high-temperature-seal-2","tag-hydraulic-seal","tag-industrial-sealing-solutions","tag-long-life-seal","tag-nbr-seal","tag-oil-and-fuel-resistant-seal","tag-pneumatic-seal","tag-static-sealing","tag-viton-seal"],"_links":{"self":[{"href":"https:\/\/www.wonzh.com\/fi\/wp-json\/wp\/v2\/posts\/1814","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wonzh.com\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wonzh.com\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wonzh.com\/fi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wonzh.com\/fi\/wp-json\/wp\/v2\/comments?post=1814"}],"version-history":[{"count":1,"href":"https:\/\/www.wonzh.com\/fi\/wp-json\/wp\/v2\/posts\/1814\/revisions"}],"predecessor-version":[{"id":1815,"href":"https:\/\/www.wonzh.com\/fi\/wp-json\/wp\/v2\/posts\/1814\/revisions\/1815"}],"wp:attachment":[{"href":"https:\/\/www.wonzh.com\/fi\/wp-json\/wp\/v2\/media?parent=1814"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wonzh.com\/fi\/wp-json\/wp\/v2\/categories?post=1814"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wonzh.com\/fi\/wp-json\/wp\/v2\/tags?post=1814"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}