{"id":3359,"date":"2025-04-14T16:16:02","date_gmt":"2025-04-14T08:16:02","guid":{"rendered":"https:\/\/www.aox-actuator.com\/?p=3359"},"modified":"2025-06-15T15:20:33","modified_gmt":"2025-06-15T07:20:33","slug":"fail-open-vs-fail-close-valve-actuator","status":"publish","type":"post","link":"https:\/\/www.aox-actuator.com\/de\/blog\/fail-open-vs-fail-close-valve-actuator\/","title":{"rendered":"Ventilantriebe mit Fail Open vs. Fail Close: Was ist der Unterschied?"},"content":{"rendered":"<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"1000\" src=\"https:\/\/www.aox-actuator.com\/wp-content\/uploads\/2024\/09\/AOX-P5.jpg\" alt=\"Pneumatischer Ventilantrieb der AOX-P-Serie mit Endschalterkasten\" class=\"wp-image-2766\" style=\"width:530px;height:auto\" srcset=\"https:\/\/www.aox-actuator.com\/wp-content\/uploads\/2024\/09\/AOX-P5.jpg 1000w, https:\/\/www.aox-actuator.com\/wp-content\/uploads\/2024\/09\/AOX-P5-500x500.jpg 500w, https:\/\/www.aox-actuator.com\/wp-content\/uploads\/2024\/09\/AOX-P5-300x300.jpg 300w, https:\/\/www.aox-actuator.com\/wp-content\/uploads\/2024\/09\/AOX-P5-768x768.jpg 768w, https:\/\/www.aox-actuator.com\/wp-content\/uploads\/2024\/09\/AOX-P5-150x150.jpg 150w, https:\/\/www.aox-actuator.com\/wp-content\/uploads\/2024\/09\/AOX-P5-75x75.jpg 75w, https:\/\/www.aox-actuator.com\/wp-content\/uploads\/2024\/09\/AOX-P5-480x480.jpg 480w, https:\/\/www.aox-actuator.com\/wp-content\/uploads\/2024\/09\/AOX-P5-800x800.jpg 800w\" sizes=\"auto, (max-width:767px) 480px, (max-width:1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Bei einem Stromausfall wird die Standardeinstellung Ihres Ventils kritisch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hier kommen Fail-Open- und Fail-Close-Aktuatoren ins Spiel. Diese sind so konzipiert, dass sie den Durchfluss bei Stromausfall automatisch stoppen oder fortsetzen. Die Wahl zwischen diesen beiden h\u00e4ngt davon ab, was Sie sch\u00fctzen m\u00f6chten \u2013 Ihr System, Ihr Produkt oder die Menschen, die damit arbeiten.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Im Folgenden erl\u00e4utern wir den eigentlichen Unterschied zwischen Ventilantrieben mit Fail-Open- und Fail-Close-Funktion, erkl\u00e4ren, was sie zum Umschalten veranlasst und wie Sie den richtigen f\u00fcr Ihre Konfiguration ausw\u00e4hlen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Was l\u00f6st eine ausfallsichere Reaktion aus?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ausfallsicher bedeutet nicht, dass das Ventil kaputt geht.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dies bedeutet, dass das System die Energiequelle verloren hat, die den Aktuator antreibt. Dabei kann es sich um Elektrizit\u00e4t, Luft, Hydraulikfl\u00fcssigkeit oder Gas handeln.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In jedem Fall ist der Aktuator so ausgelegt, dass er nach Wegfall des Signals in eine sichere Position zur\u00fcckkehrt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dieses Signal kann aus folgenden Gr\u00fcnden fehlschlagen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stromausf\u00e4lle bei Gewitter<\/li>\n\n\n\n<li>Niedriger Vordruck<\/li>\n\n\n\n<li>Eingefrorene Leitungen oder Ger\u00e4teausfall<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Wenn Ihr Prozess keinen ungeplanten Fluss zul\u00e4sst, m\u00fcssen Sie entscheiden, ob der Fluss in diesem Fall gestoppt oder fortgesetzt werden soll.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Wie ein Fail-Open-Ventil reagiert<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ein Fail-Open-Ventil \u00f6ffnet sich, wenn der Strom ausf\u00e4llt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Diese Ventile sind in der Regel federbelastet und bleiben ge\u00f6ffnet, sofern sie nicht durch Druckluft (oder Strom) geschlossen gehalten werden. Deshalb werden sie auch als Luftschlie\u00dfventile bezeichnet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fail-Open-Setups werden verwendet, wenn es sicherer ist, Medien durchzulassen, als sie bei einem Fehler zu blockieren.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Typische Beispiele:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>K\u00fchlwasserleitungen zur Vermeidung von \u00dcberhitzung<\/li>\n\n\n\n<li>Feuerl\u00f6schsysteme, bei denen Wasser ohne Verz\u00f6gerung flie\u00dfen muss<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Wenn die Stromversorgung wiederhergestellt ist, schlie\u00dft der Antrieb das Ventil wieder, wenn der Prozess dies erfordert.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Wenn Ihre Priorit\u00e4t also darin besteht, den Druck abzubauen oder den K\u00fchlmittelfluss aufrechtzuerhalten, ist eine Fail-Open-Ventilkonfiguration f\u00fcr dieses Ziel geeignet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Was ein Fail-Closed-Ventil bewirkt<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ein Fail-Closed-Ventil schlie\u00dft bei Stromausfall.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Diese Ventile werden auch als Luft\u00f6ffnungsventile bezeichnet und ben\u00f6tigen eine konstante Strom- oder Druckquelle, um ge\u00f6ffnet zu bleiben. Bei einem Stromausfall schlie\u00dft sich das Ventil automatisch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dies hilft, Folgendes zu verhindern:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Leckagen von Gefahrstoffen<\/li>\n\n\n\n<li>Ger\u00e4tesch\u00e4den durch \u00dcberlauf<\/li>\n\n\n\n<li>Medien flie\u00dfen in unerw\u00fcnschte Bereiche<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Sie finden h\u00e4ufig geschlossene Ventile in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Abwassersysteme<\/li>\n\n\n\n<li>Chemikalientanks<\/li>\n\n\n\n<li>Druckempfindliche Beh\u00e4lterausl\u00e4sse<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ein Beinahe-Fehlerszenario ist ideal, wenn Ihr Prozess im Notfall sofort gestoppt werden muss.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<style>\r\n  .hero-recommendation-vertical {\r\n    max-width: 420px;\r\n    margin: 32px auto;\r\n    background: #fff;\r\n    border-radius: 16px;\r\n    box-shadow: 0 4px 18px 0 rgba(60, 66, 87, 0.10);\r\n    overflow: hidden;\r\n    transition: box-shadow 0.2s;\r\n  }\r\n  .hero-link-vertical {\r\n    display: flex;\r\n    flex-direction: column;\r\n    align-items: center;\r\n    text-decoration: none;\r\n    color: inherit;\r\n    width: 100%;\r\n    transition: background 0.2s;\r\n  }\r\n  .hero-link-vertical:hover {\r\n    background: #f8f9fa;\r\n  }\r\n  .hero-image-vertical img {\r\n    display: block;\r\n    width: 100%;\r\n    height: 210px;\r\n    object-fit: cover;\r\n    background: #f4f4f4;\r\n  }\r\n  .hero-content-vertical {\r\n    padding: 28px 22px 24px 22px;\r\n    text-align: center;\r\n    width: 100%;\r\n  }\r\n  .hero-content-vertical h2 {\r\n    margin: 0 0 12px 0;\r\n    font-size: 1.3rem;\r\n    font-weight: 700;\r\n    color: #263238;\r\n    letter-spacing: 0.01rem;\r\n  }\r\n  .hero-content-vertical p {\r\n    margin: 0 0 18px 0;\r\n    font-size: 1rem;\r\n    color: #546e7a;\r\n    line-height: 1.5;\r\n  }\r\n  .hero-btn-vertical {\r\n    padding: 10px 26px;\r\n    background: #ffc107; \/* Changed button background color *\/\r\n    border: none;\r\n    border-radius: 6px;\r\n    font-size: 1rem;\r\n    font-weight: 600;\r\n    color: #fff;\r\n    cursor: pointer;\r\n    transition: background 0.2s, color 0.2s;\r\n    box-shadow: 0 2px 8px rgba(255,193,7,0.10); \/* Adjusted shadow color *\/\r\n  }\r\n  .hero-btn-vertical:hover {\r\n    background: #e0a800; \/* Darkened color for hover effect (approx 10-15%) *\/\r\n  }\r\n  @media (max-width: 600px) {\r\n    .hero-recommendation-vertical {\r\n      max-width: 98vw;\r\n    }\r\n    .hero-image-vertical img {\r\n      height: 160px;\r\n    }\r\n    .hero-content-vertical {\r\n      padding: 18px 8px 16px 8px;\r\n    }\r\n  }\r\n<\/style>\r\n<div class=\"hero-recommendation-vertical\">\r\n  <a href=\"https:\/\/www.aox-actuator.com\/de\/product\/aox-q-series-electric-actuator\/\" class=\"hero-link-vertical\" target=\"_blank\" rel=\"noopener\">\r\n    <div class=\"hero-image-vertical\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.aox-actuator.com\/wp-content\/uploads\/2024\/09\/AOX-Q-series-electric-actuator-\u2013-7-1.jpg\" alt=\"Elektrischer Aktuator der Serie AOX-Q\">\r\n    <\/div>\r\n    <div class=\"hero-content-vertical\">\r\n      <p>Elektrischer Aktuator der Serie AOX-Q<\/p>\r\n      <p>\r\n      Der elektrische Antrieb der Serie AOX-Q bietet eine zuverl\u00e4ssige und pr\u00e4zise Steuerung f\u00fcr eine Vielzahl von Ventilanwendungen und gew\u00e4hrleistet einen effizienten Betrieb und eine lange Lebensdauer im industriellen Umfeld.\r\n      <\/p>\r\n      <button class=\"hero-btn-vertical\">Produkte und L\u00f6sungen entdecken<\/button>\r\n    <\/div>\r\n  <\/a>\r\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<style>\r\n  .hero-recommendation-vertical {\r\n    max-width: 420px;\r\n    margin: 32px auto;\r\n    background: #fff;\r\n    border-radius: 16px;\r\n    box-shadow: 0 4px 18px 0 rgba(60, 66, 87, 0.10);\r\n    overflow: hidden;\r\n    transition: box-shadow 0.2s;\r\n  }\r\n  .hero-link-vertical {\r\n    display: flex;\r\n    flex-direction: column;\r\n    align-items: center;\r\n    text-decoration: none;\r\n    color: inherit;\r\n    width: 100%;\r\n    transition: background 0.2s;\r\n  }\r\n  .hero-link-vertical:hover {\r\n    background: #f8f9fa;\r\n  }\r\n  .hero-image-vertical img {\r\n    display: block;\r\n    width: 100%;\r\n    height: 210px;\r\n    object-fit: cover;\r\n    background: #f4f4f4;\r\n  }\r\n  .hero-content-vertical {\r\n    padding: 28px 22px 24px 22px;\r\n    text-align: center;\r\n    width: 100%;\r\n  }\r\n  .hero-content-vertical h2 {\r\n    margin: 0 0 12px 0;\r\n    font-size: 1.3rem;\r\n    font-weight: 700;\r\n    color: #263238;\r\n    letter-spacing: 0.01rem;\r\n  }\r\n  .hero-content-vertical p {\r\n    margin: 0 0 18px 0;\r\n    font-size: 1rem;\r\n    color: #546e7a;\r\n    line-height: 1.5;\r\n  }\r\n  .hero-btn-vertical {\r\n    padding: 10px 26px;\r\n    background: #ffc107;\r\n    border: none;\r\n    border-radius: 6px;\r\n    font-size: 1rem;\r\n    font-weight: 600;\r\n    color: #fff;\r\n    cursor: pointer;\r\n    transition: background 0.2s, color 0.2s;\r\n    box-shadow: 0 2px 8px rgba(255,193,7,0.10);\r\n  }\r\n  .hero-btn-vertical:hover {\r\n    background: #e0a800;\r\n  }\r\n  @media (max-width: 600px) {\r\n    .hero-recommendation-vertical {\r\n      max-width: 98vw;\r\n    }\r\n    .hero-image-vertical img {\r\n      height: 160px;\r\n    }\r\n    .hero-content-vertical {\r\n      padding: 18px 8px 16px 8px;\r\n    }\r\n  }\r\n<\/style>\r\n<div class=\"hero-recommendation-vertical\">\r\n  <a href=\"https:\/\/www.aox-actuator.com\/de\/product\/aox-m-z-series-multi-turn-electric-actuato\/\" class=\"hero-link-vertical\" target=\"_blank\" rel=\"noopener\">\r\n    <div class=\"hero-image-vertical\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.aox-actuator.com\/wp-content\/uploads\/2024\/09\/AOX-M-Multi-Turn-Electric-Actuator-800x800.jpg\" alt=\"Elektrischer Drehantrieb der Serie AOX-MZ\">\r\n    <\/div>\r\n    <div class=\"hero-content-vertical\">\r\n      <p>AOX-MZ Elektrischer Drehantrieb<\/p>\r\n      <p>\r\n      Der elektrische Mehrdrehantrieb AOX-MZ bietet eine robuste und zuverl\u00e4ssige Steuerung f\u00fcr gro\u00dfe Ventile, die mehrere Drehungen erfordern, und gew\u00e4hrleistet einen pr\u00e4zisen und effizienten Betrieb.\r\n      <\/p>\r\n      <button class=\"hero-btn-vertical\">Produkte und L\u00f6sungen entdecken<\/button>\r\n    <\/div>\r\n  <\/a>\r\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Fail Open vs. Fail Close \u2013 Was passt?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Die Entscheidung h\u00e4ngt von Ihrer Bewerbung ab.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fragen Sie: Welches Risiko besteht, wenn das Ventil ge\u00f6ffnet bleibt, obwohl es das nicht sollte? Welcher Schaden entsteht, wenn es schlie\u00dft und den Durchfluss unterbricht?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Verwenden Sie ein Fail-Open-Ventil, wenn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Das Blockieren des Durchflusses w\u00e4hrend eines Stromausfalls w\u00fcrde zu \u00dcberhitzung oder Ablagerungen f\u00fchren<\/li>\n\n\n\n<li>Sicherheit h\u00e4ngt davon ab, dass Medien weiter flie\u00dfen (z. B. Brandschutzsysteme)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Verwenden Sie ein ausfallsicheres Ventil, wenn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sie m\u00fcssen Medien sofort bei Signalverlust enthalten<\/li>\n\n\n\n<li>Unkontrollierter Durchfluss kann nachgeschaltete Ger\u00e4te oder Sicherheitszonen besch\u00e4digen<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Jeder hat seinen eigenen Anwendungsfall. Es geht nicht darum, was besser ist, sondern darum, was Sie sch\u00fctzen m\u00fcssen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Um ein tieferes Verst\u00e4ndnis daf\u00fcr zu erhalten, wie Aktoren in diesen Situationen zur Steuerung des Durchflusses beitragen, lesen Sie <a href=\"https:\/\/www.aox-actuator.com\/de\/blog\/electric-valve-actuator-control-basics\/\" target=\"_blank\" rel=\"noreferrer noopener\">Grundlagen der Ventilsteuerung mit elektrischen Ventilantrieben<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Die Beziehung zwischen offenem und geschlossenem Ventil<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Einige Systeme verwenden sowohl Fail-Open- als auch Fail-Closed-Ventile.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dies gilt insbesondere f\u00fcr gro\u00dfe Industrieanlagen, in denen der Durchfluss je nach Notfallsituation umgeleitet oder blockiert werden muss. Es kommt h\u00e4ufig vor, dass Ventile in Zulaufleitungen offen bleiben, w\u00e4hrend Ablaufleitungen geschlossen bleiben.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dieser Grad der Kontrolle h\u00e4ngt vom Aktuatortyp und der Setup-Logik ab.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mithilfe elektrischer Ventilantriebe k\u00f6nnen Sie Sequenzen programmieren, die Ihren Ausfallsicherheitszielen entsprechen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Wenn Ihr Aktuator tr\u00e4ge oder nicht reagierend erscheint, k\u00f6nnen Sie hier beginnen: <a href=\"https:\/\/www.aox-actuator.com\/de\/blog\/actuator-valve-not-working-signs\/\" target=\"_blank\" rel=\"noreferrer noopener\">Welche Anzeichen deuten darauf hin, dass mein Stellventil nicht funktioniert?<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Lassen Sie nicht zu, dass ein Stromausfall das Ergebnis bestimmt<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Stromausf\u00e4lle kommen vor. Ob durch die Natur, Systemfehler oder routinem\u00e4\u00dfige Wartungsarbeiten verursacht \u2013 irgendwann wird Ihr Ventilantrieb davon betroffen sein.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Die Frage ist: Wie geht es weiter?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Die Einstellung \u201eFail Open\u201c oder \u201eFail Close\u201c ist keine kleine Sache. Sie kann Ihnen Ausfallzeiten, Sicherheitsrisiken oder rechtliche Probleme ersparen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">W\u00e4hlen Sie diejenige aus, die Ihre Systemziele unterst\u00fctzt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sie k\u00f6nnen Antriebstypen erkunden, die sowohl Fail-Open- als auch Fail-Closed-Funktionen bieten in unserem <a href=\"https:\/\/www.aox-actuator.com\/de\/product-category\/electric-actuator\/\" target=\"_blank\" rel=\"noreferrer noopener\">Katalog f\u00fcr elektrische Stellantriebe<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ben\u00f6tigen Sie Unterst\u00fctzung? Unser Team unterst\u00fctzt Sie bei der Bearbeitung Ihrer Bewerbung und der Auswahl des sichersten Weges.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ressource<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.geminivalve.com\/fail-safe-open-close-valves\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Fail Open vs. Fail Close \u2013 was ist besser?<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>When power is lost, your valve\u2019s default setting becomes critical. That\u2019s where fail open and fail close actuators come in. These are designed to either stop<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":2766,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54],"tags":[],"class_list":["post-3359","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fail Open vs Fail Close Valve Actuators: What\u2019s the Difference?<\/title>\n<meta name=\"description\" content=\"Learn the difference between a fail open valve and a fail closed actuator. Understand which fail-safe mode protects your system during a power loss.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.aox-actuator.com\/de\/blog\/fail-open-vs-fail-close-valve-actuator\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fail Open vs Fail Close Valve Actuators: What\u2019s the Difference?\" \/>\n<meta property=\"og:description\" content=\"Learn the difference between a fail open valve and a fail closed actuator. 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