{"id":4284,"date":"2023-04-23T20:40:31","date_gmt":"2023-04-23T12:40:31","guid":{"rendered":"http:\/\/www.dcl-controls.com\/?p=4284"},"modified":"2025-03-31T09:27:20","modified_gmt":"2025-03-31T09:27:20","slug":"why-explosion-proof-actuator","status":"publish","type":"post","link":"https:\/\/dclactuator.com\/nb_no\/stotte\/en-aktuator\/hvorfor-eksplosjonssikker-aktuator","title":{"rendered":"Hvorfor trenger noen aktuatorer eksplosjonsbeskyttelse?"},"content":{"rendered":"
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\u00a0<\/p>

1. What is an Explosion?<\/strong><\/h2>

An explosion occurs when flammable substances mix with oxygen<\/strong> and ignite under certain conditions. If the reaction speed exceeds the speed of sound<\/strong>, it results in a destructive explosion wave<\/strong>.<\/p>

2. What is Explosion Protection?<\/strong><\/h2>

To prevent explosions<\/strong>, at least one of the three key factors must be controlled:<\/p>

  1. Flammable substances<\/strong><\/p><\/li>

  2. Oxygen<\/strong><\/p><\/li>

  3. Ignition source<\/strong><\/p><\/li><\/ol>

    Since flammable substances and oxygen are often unavoidable<\/strong> in industrial environments, the ignition source must be controlled<\/strong>.<\/p>

    Electrical equipment is a potential ignition source<\/strong> due to:
    \u2714 Surface heating during operation<\/strong>
    \u2714 Electrostatic discharge<\/strong>
    \u2714 Sparks from electrical currents<\/strong><\/p>

    Explosion-proof electrical equipment is designed to prevent excessive surface temperatures and electrical sparks<\/strong>, ensuring that it does not become an ignition source<\/strong>.<\/p>

    <\/p>

    3. Classification of Hazardous Environments<\/strong><\/h2>

    Explosion-proof electrical equipment is classified into two categories:<\/p>

    • Category I<\/strong>: Equipment for coal mines<\/strong><\/p><\/li>

    • Category II<\/strong>: Equipment for other explosive gas environments<\/strong><\/p><\/li><\/ul>

      Category II Equipment<\/strong><\/h3>

      1. Explosion Groups (Based on Safety Gap & Ignition Current)<\/strong><\/p>

        • IIA<\/strong><\/p><\/li>

        • IIB<\/strong> (can be used in IIA conditions)<\/p><\/li>

        • IIC<\/strong> (can be used in IIA & IIB conditions)<\/p><\/li><\/ul><\/li>

        • Temperature Groups (Based on Maximum Surface Temperature)<\/strong><\/p>

          • T1 (450\u00b0C)<\/strong><\/p><\/li>

          • T2 (300\u00b0C)<\/strong><\/p><\/li>

          • T3 (200\u00b0C)<\/strong><\/p><\/li>

          • T4 (135\u00b0C)<\/strong><\/p><\/li>

          • T5 (100\u00b0C)<\/strong><\/p><\/li>

          • T6 (85\u00b0C)<\/strong><\/p><\/li><\/ul><\/li><\/ol>

            More than 90% of explosive gases<\/strong> fall under IIA, IIB groups<\/strong> og T1\u2013T4 temperature classifications<\/strong>.<\/p>

            <\/p>

            4. How is Explosion Protection Achieved?<\/strong><\/h2>

            Several methods ensure that electrical equipment is safe for explosive environments<\/strong>, as defined by GB3836, IEC60079, EN50014<\/strong> standards.<\/p>

            <\/p>

            Explosion-Proof (Exd) Design<\/strong><\/h3>

            DCL explosion-proof actuators are manufactured in accordance with:
            \u2714 GB3836.1-2010, GB3836.2-2010<\/strong>
            \u2714 IEC 60079-0, IEC 60079-1, IEC 60079-31<\/strong>
            \u2714 ISO\/IEC 80079-36, ISO\/IEC 80079-37<\/strong><\/p>

            Flameproof (Exd) Design Principles<\/strong><\/h4>

            <\/p>

            \u2714 Explosion may occur inside the device<\/strong>, but the enclosure prevents it from igniting the external environment.
            \u2714 Flameproof joints<\/strong> are designed with the correct gap and length<\/strong> to contain internal explosions.
            \u2714 Strong enclosures<\/strong> withstand high internal pressure<\/strong> without breaking.<\/p>

            DCL Explosion-Proof Components<\/strong><\/h3>

            \u2714 Motor compartment<\/strong>
            \u2714 Electrical component compartment<\/strong>
            \u2714 Wiring compartment<\/strong><\/p>

            5. DCL Explosion-Proof Actuator Certification<\/strong><\/h2>

            Explosion Protection Level: Exd IIC T4 Gb<\/strong><\/h3>

            \u2714 Ex<\/strong> \u2013 Explosion-proof marking
            \u2714 d<\/strong> \u2013 Flameproof type (“Exd”)
            \u2714 II<\/strong> \u2013 Non-mining applications
            \u2714 C<\/strong> \u2013 Explosion group (higher safety requirements)
            \u2714 T4<\/strong> \u2013 Maximum surface temperature 135\u00b0C<\/strong>
            \u2714 Gb<\/strong> \u2013 Equipment protection level<\/p>

            Konklusjon<\/strong><\/h3>

            Explosion-proof actuators are essential in hazardous environments<\/strong> to prevent ignition of explosive gases<\/strong>. DCL\u2019s Exd IIC T4 Gb-rated actuators<\/strong> ensure safety by:
            \u2714 Containing internal explosions<\/strong>
            \u2714 Preventing sparks & excessive heat<\/strong>
            \u2714 Withstanding high pressure without rupture<\/strong><\/p>

            These design measures make DCL actuators reliable and safe<\/strong> for industrial applications in explosive atmospheres<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

            \u00a0 1. Hva er en eksplosjon? En eksplosjon oppst\u00e5r n\u00e5r brennbare stoffer blandes med oksygen og antennes under visse forhold. Hvis reaksjonshastigheten overstiger lydhastigheten, resulterer det i en destruktiv eksplosjonsb\u00f8lge. 2. Hva er eksplosjonsbeskyttelse? For \u00e5 forhindre eksplosjoner m\u00e5 minst \u00e9n av de tre n\u00f8kkelfaktorene kontrolleres: [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_theme","format":"standard","meta":{"_acf_changed":true,"footnotes":""},"categories":[91],"tags":[53,66,39],"class_list":["post-4284","post","type-post","status-publish","format-standard","hentry","category-an-actuator","tag-actuator","tag-explosion-proof-actuator","tag-faq"],"acf":[],"_links":{"self":[{"href":"https:\/\/dclactuator.com\/nb_no\/wp-json\/wp\/v2\/posts\/4284","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dclactuator.com\/nb_no\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dclactuator.com\/nb_no\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dclactuator.com\/nb_no\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dclactuator.com\/nb_no\/wp-json\/wp\/v2\/comments?post=4284"}],"version-history":[{"count":0,"href":"https:\/\/dclactuator.com\/nb_no\/wp-json\/wp\/v2\/posts\/4284\/revisions"}],"wp:attachment":[{"href":"https:\/\/dclactuator.com\/nb_no\/wp-json\/wp\/v2\/media?parent=4284"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dclactuator.com\/nb_no\/wp-json\/wp\/v2\/categories?post=4284"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dclactuator.com\/nb_no\/wp-json\/wp\/v2\/tags?post=4284"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}