{"id":1797,"date":"2026-02-13T12:03:01","date_gmt":"2026-02-13T12:03:01","guid":{"rendered":"https:\/\/www.wonzh.com\/?p=1797"},"modified":"2026-02-13T12:05:30","modified_gmt":"2026-02-13T12:05:30","slug":"o-krouzek-vs-tesneni-u-kabelky-nosnost-a-odolnost-proti-uniku","status":"publish","type":"post","link":"https:\/\/www.wonzh.com\/cs\/o-ring-vs-u-cup-seal-load-capacity-and-leakage-resistance\/","title":{"rendered":"O-krou\u017eek vs. t\u011bsn\u011bn\u00ed U-Cup: Zat\u00ed\u017eitelnost a odolnost proti \u00faniku."},"content":{"rendered":"

T\u011bsnic\u00ed komponenty jsou v hydraulick\u00fdch, pneumatick\u00fdch a pr\u016fmyslov\u00fdch syst\u00e9mech kl\u00ed\u010dov\u00e9. Mezi nejpou\u017e\u00edvan\u011bj\u0161\u00ed pat\u0159\u00ed O-krou\u017eky<\/strong> a T\u011bsn\u011bn\u00ed ve tvaru U<\/strong>. Oba typy zabra\u0148uj\u00ed \u00faniku kapaliny, li\u0161\u00ed se v\u0161ak konstrukc\u00ed, nosnost\u00ed, odolnost\u00ed proti \u00faniku a vhodnost\u00ed pro r\u016fzn\u00e9 aplikace. V\u00fdb\u011br spr\u00e1vn\u00e9ho t\u011bsn\u011bn\u00ed zaji\u0161\u0165uje \u00fa\u010dinnost syst\u00e9mu, bezpe\u010dnost a dlouhou \u017eivotnost.<\/p>\n\n\n\n

<\/p>\n\n\n\n

1. Struktur\u00e1ln\u00ed rozd\u00edly<\/h2>\n\n\n\n

O-krou\u017eky<\/strong>:<\/p>\n\n\n\n

    \n
  • Jednoduch\u00fd kruhov\u00fd pr\u016f\u0159ez<\/li>\n\n\n\n
  • Obvykle se vyr\u00e1b\u00ed z elastomer\u016f jako NBR, FKM nebo EPDM.<\/li>\n\n\n\n
  • Navr\u017eeno k ut\u011bsn\u011bn\u00ed tlakovou silou ve v\u00fdvodce.<\/li>\n<\/ul>\n\n\n\n

    T\u011bsn\u011bn\u00ed U-Cup<\/strong>:<\/p>\n\n\n\n

      \n
    • Pr\u016f\u0159ez ve tvaru U s dutinou a okrajem<\/li>\n\n\n\n
    • \u010casto s pru\u017einou nebo s jedn\u00edm kloubem pro lep\u0161\u00ed kontakt.<\/li>\n\n\n\n
    • Vyrobeno z elastomer\u016f nebo teflonov\u00fdch materi\u00e1l\u016f<\/li>\n\n\n\n
    • Navr\u017eeno pro dynamick\u00e9 t\u011bsn\u011bn\u00ed proti povrchu ty\u010de nebo p\u00edstu.<\/li>\n<\/ul>\n\n\n\n

      2. Srovn\u00e1n\u00ed nosnosti<\/h2>\n\n\n\n
      Funkce<\/th>O-krou\u017eek<\/th>T\u011bsn\u011bn\u00ed U-Cup<\/th><\/tr><\/thead>
      Provozn\u00ed tlak<\/td>St\u0159edn\u00ed a\u017e vysok\u00e1 (a\u017e 50-60 MPa)<\/td>Vysok\u00e1 (a\u017e 70-80 MPa se z\u00e1lo\u017en\u00edm krou\u017ekem)<\/td><\/tr>
      Podpora zat\u00ed\u017een\u00ed<\/td>Omezeno plochou pr\u016f\u0159ezu<\/td>Lep\u0161\u00ed rozlo\u017een\u00ed z\u00e1t\u011b\u017ee d\u00edky konstrukci rt\u016f<\/td><\/tr>
      V\u00fdkonnost dynamick\u00e9ho zat\u00ed\u017een\u00ed<\/td>M\u00edrn\u00e1<\/td>Vynikaj\u00edc\u00ed pro vratn\u00fd pohyb<\/td><\/tr>
      T\u0159en\u00ed<\/td>N\u00edzk\u00e1 a\u017e st\u0159edn\u00ed<\/td>M\u00edrn\u011b vy\u0161\u0161\u00ed kv\u016fli kontaktu rt\u016f<\/td><\/tr>
      Tolerance axi\u00e1ln\u00edho pohybu<\/td>M\u00edrn\u00e1<\/td>Vysok\u00e1<\/td><\/tr>
      Vhodn\u00e1 m\u00e9dia<\/td>Hydraulick\u00e9 kapaliny, vzduch, voda<\/td>Hydraulick\u00e9 kapaliny, maziva, vzduch<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

      Engineering Insight:<\/strong>
      T\u011bsn\u011bn\u00ed ve tvaru U mohou d\u00edky sv\u00e9 konstrukci s okraji zvl\u00e1dnout vy\u0161\u0161\u00ed dynamick\u00e9 zat\u00ed\u017een\u00ed, zat\u00edmco O-krou\u017eky jsou jednodu\u0161\u0161\u00ed a kompaktn\u011bj\u0161\u00ed, ale m\u00e9n\u011b vhodn\u00e9 pro vysokotlak\u00e9 dynamick\u00e9 aplikace.<\/p>\n\n\n\n

      3. Odolnost proti \u00faniku<\/h2>\n\n\n\n
        \n
      • O-krou\u017eky<\/strong> se spol\u00e9haj\u00ed na tlak ve v\u00fdvodce, kter\u00fd udr\u017euje t\u011bsnost. Za statick\u00fdch podm\u00ednek jsou velmi \u00fa\u010dinn\u00e9, ale p\u0159i dynamick\u00fdch aplikac\u00edch m\u016f\u017ee doj\u00edt k jejich vytla\u010den\u00ed nebo opot\u0159eben\u00ed.<\/li>\n\n\n\n
      • T\u011bsn\u011bn\u00ed U-Cup<\/strong> zaji\u0161\u0165uj\u00ed zv\u00fd\u0161enou odolnost proti \u00fanik\u016fm v dynamick\u00fdch syst\u00e9mech. Konstrukce rt\u016f umo\u017e\u0148uje t\u011bsn\u011bn\u00ed udr\u017eet kontakt p\u0159i m\u011bn\u00edc\u00edm se tlaku a pohybu, co\u017e sni\u017euje net\u011bsnost v p\u00edstov\u00fdch a ty\u010dov\u00fdch aplikac\u00edch.<\/li>\n<\/ul>\n\n\n\n

        4. Teplotn\u00ed a chemick\u00e1 kompatibilita<\/h2>\n\n\n\n
        Funkce<\/th>O-krou\u017eek<\/th>T\u011bsn\u011bn\u00ed U-Cup<\/th><\/tr><\/thead>
        Teplotn\u00ed rozsah<\/td>-40\u00b0C a\u017e 200\u00b0C (v z\u00e1vislosti na materi\u00e1lu)<\/td>-30\u00b0C a\u017e 250\u00b0C (varianty z elastomeru nebo PTFE)<\/td><\/tr>
        Chemick\u00e1 odolnost<\/td>St\u0159edn\u00ed a\u017e vysok\u00e1 (v z\u00e1vislosti na materi\u00e1lu)<\/td>Vysok\u00e1 (zejm\u00e9na PTFE nebo vyztu\u017een\u00fd elastomer)<\/td><\/tr>
        Vhodnost m\u00e9di\u00ed<\/td>Hydraulick\u00e9 oleje, voda, vzduch<\/td>Hydraulick\u00e9 oleje, maziva, chemik\u00e1lie, vzduch<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

        Kl\u00ed\u010dov\u00fd bod:<\/strong> T\u011bsn\u011bn\u00ed ve tvaru U, zejm\u00e9na pokud jsou vyrobena z PTFE, maj\u00ed ve srovn\u00e1n\u00ed se standardn\u00edmi elastomerov\u00fdmi O-krou\u017eky vynikaj\u00edc\u00ed chemickou odolnost a v\u00fdkon p\u0159i vysok\u00fdch teplot\u00e1ch.<\/p>\n\n\n\n

        5. Aplikace<\/h2>\n\n\n\n

        O-krou\u017eky<\/strong>:<\/p>\n\n\n\n

          \n
        • Statick\u00e1 t\u011bsn\u011bn\u00ed hydraulick\u00fdch v\u00e1lc\u016f a ventil\u016f<\/li>\n\n\n\n
        • Potrubn\u00ed spoje a tvarovky<\/li>\n\n\n\n
        • Syst\u00e9my s n\u00edzk\u00fdm a\u017e st\u0159edn\u00edm tlakem<\/li>\n<\/ul>\n\n\n\n

          T\u011bsn\u011bn\u00ed U-Cup<\/strong>:<\/p>\n\n\n\n

            \n
          • Dynamick\u00e9 t\u011bsn\u011bn\u00ed p\u00edst\u016f a ty\u010d\u00ed<\/li>\n\n\n\n
          • Vysokotlak\u00e9 hydraulick\u00e9 syst\u00e9my<\/li>\n\n\n\n
          • Pr\u016fmyslov\u00e9 v\u00e1lce s vratn\u00fdm pohybem<\/li>\n\n\n\n
          • Aplikace vy\u017eaduj\u00edc\u00ed minim\u00e1ln\u00ed \u00fanik p\u0159i prom\u011bnliv\u00e9m zat\u00ed\u017een\u00ed<\/li>\n<\/ul>\n\n\n\n

            6. \u00dadr\u017eba a \u017eivotnost<\/h2>\n\n\n\n
              \n
            • O-krou\u017eky<\/strong>: Snadno se vym\u011b\u0148uj\u00ed, jsou kompaktn\u00ed, ale v dynamick\u00fdch aplikac\u00edch nebo p\u0159i vytla\u010dov\u00e1n\u00ed se mohou rychle opot\u0159ebovat.<\/li>\n\n\n\n
            • T\u011bsn\u011bn\u00ed U-Cup<\/strong>: O n\u011bco slo\u017eit\u011bj\u0161\u00ed instalace, ale del\u0161\u00ed \u017eivotnost v p\u00edstov\u00fdch a vysokotlak\u00fdch podm\u00ednk\u00e1ch a lep\u0161\u00ed udr\u017een\u00ed maz\u00e1n\u00ed.<\/li>\n<\/ul>\n\n\n\n

              7. \u00davahy o n\u00e1kladech<\/h2>\n\n\n\n
                \n
              • O-krou\u017eky jsou obecn\u011b levn\u00e9 a jejich v\u00fdroba je jednoduch\u00e1.<\/li>\n\n\n\n
              • T\u011bsn\u011bn\u00ed ve tvaru U jsou dra\u017e\u0161\u00ed z hlediska materi\u00e1lu a v\u00fdrobn\u00edch n\u00e1klad\u016f, ale poskytuj\u00ed lep\u0161\u00ed v\u00fdkon v dynamick\u00fdch vysokotlak\u00fdch syst\u00e9mech.<\/li>\n<\/ul>\n\n\n\n

                Celkov\u00e9 n\u00e1klady na \u017eivotn\u00ed cyklus<\/strong> up\u0159ednost\u0148uje t\u011bsn\u011bn\u00ed ve tvaru U v aplikac\u00edch s vysok\u00fdm tlakem a vysok\u00fdm cyklem z d\u016fvodu zkr\u00e1cen\u00ed doby odst\u00e1vek a \u00fadr\u017eby.<\/p>\n\n\n\n

                Z\u00e1v\u011br<\/h2>\n\n\n\n
                  \n
                • O-krou\u017eky<\/strong>: Ide\u00e1ln\u00ed pro statick\u00e9 nebo n\u00edzkotlak\u00e9 aplikace; jednoduch\u00e9, cenov\u011b v\u00fdhodn\u00e9, snadn\u00e1 instalace.<\/li>\n\n\n\n
                • T\u011bsn\u011bn\u00ed U-Cup<\/strong>: Vynikaj\u00edc\u00ed dynamick\u00e9 vlastnosti, vysok\u00e1 nosnost a vynikaj\u00edc\u00ed odolnost proti \u00faniku; ide\u00e1ln\u00ed pro hydraulick\u00e9 v\u00e1lce a pr\u016fmyslov\u00e9 stroje pod vysok\u00fdm tlakem a v pohybu.<\/li>\n<\/ul>\n\n\n\n

                  V\u00fdb\u011br spr\u00e1vn\u00e9ho typu t\u011bsn\u011bn\u00ed zaji\u0161\u0165uje spolehlivost syst\u00e9mu, sn\u00ed\u017een\u00ed net\u011bsnost\u00ed a del\u0161\u00ed \u017eivotnost.<\/strong>, optimalizace pr\u016fmyslov\u00fdch operac\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"

                  Sealing components are crucial in hydraulic, pneumatic, and industrial systems. Among the most widely used are O-rings and U-cup seals. While both prevent fluid leakage, they differ in design, load capacity, leakage resistance, and suitability for various applications. Selecting the right seal ensures system efficiency, safety, and long service life. 1. Structural Differences O-Rings: U-Cup […]<\/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":[838,1070,1138,1145,1086,1006,1141,1144,1139,1142,845,1143,837,1140],"class_list":["post-1797","post","type-post","status-publish","format-standard","hentry","category-product-knowledge","tag-dynamic-sealing","tag-elastomer-seal","tag-high-pressure-seal-2","tag-hydraulic-cylinder-seal","tag-hydraulic-seal","tag-industrial-sealing-solutions","tag-leakage-resistant-seal","tag-load-capacity-seal","tag-o-ring-seal","tag-piston-seal","tag-ptfe-seal","tag-rod-seal","tag-static-sealing","tag-u-cup-seal"],"_links":{"self":[{"href":"https:\/\/www.wonzh.com\/cs\/wp-json\/wp\/v2\/posts\/1797","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wonzh.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wonzh.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wonzh.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wonzh.com\/cs\/wp-json\/wp\/v2\/comments?post=1797"}],"version-history":[{"count":2,"href":"https:\/\/www.wonzh.com\/cs\/wp-json\/wp\/v2\/posts\/1797\/revisions"}],"predecessor-version":[{"id":1799,"href":"https:\/\/www.wonzh.com\/cs\/wp-json\/wp\/v2\/posts\/1797\/revisions\/1799"}],"wp:attachment":[{"href":"https:\/\/www.wonzh.com\/cs\/wp-json\/wp\/v2\/media?parent=1797"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wonzh.com\/cs\/wp-json\/wp\/v2\/categories?post=1797"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wonzh.com\/cs\/wp-json\/wp\/v2\/tags?post=1797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}