{"id":9988,"date":"2026-07-01T17:18:58","date_gmt":"2026-07-01T15:18:58","guid":{"rendered":"https:\/\/www.fergo.eu\/produkt\/socket-check-valve-rk104\/"},"modified":"2026-09-03T09:17:24","modified_gmt":"2026-09-03T07:17:24","slug":"socket-check-valve-rk104","status":"publish","type":"produkt","link":"https:\/\/www.fergo.eu\/en\/product\/socket-check-valve-rk104\/","title":{"rendered":"Socket Check Valve RK104"},"content":{"rendered":"<h1>Socket Check Valve<\/h1>\n<p class=\"bodytext\">The RK104 brass socket check valve is not only extremely cost-effective; it is also highly versatile for use with a wide range of media. The key advantage of a check valve over a non-return valve is that, unlike a poppet valve, the disc is not positioned fully in the flow of the medium. This allows pressure losses to be kept to a minimum. In addition, a check valve can also be used without issues with slightly contaminated media. Further specifications for the RK104 can be found in the right-hand column. We offer a wide range of non-return valves. Our sales team will be happy to advise you in finding the right non-return valve for your application.      <\/p>\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Socket Check Valve The RK104 brass socket check valve is not only extremely cost-effective; it is also highly versatile for use with a wide range of media. The key advantage of a check valve over a non-return valve is that, unlike a poppet valve, the disc is not positioned fully in the flow of the [&hellip;]<\/p>\n","protected":false},"featured_media":9990,"template":"","meta":{"_acf_changed":false,"_acf":"","footnotes":""},"produktgruppe":[122],"class_list":["post-9988","produkt","type-produkt","status-publish","has-post-thumbnail","hentry","produktgruppe-check-valves"],"acf":{"produkt_beschreibung":"<h1>Socket Check Valve<\/h1>\n<p class=\"bodytext\">The RK104 brass socket check valve is not only extremely cost-effective; it is also highly versatile for use with a wide range of media. The key advantage of a check valve over a non-return valve is that, unlike a poppet valve, the disc is not positioned fully in the flow of the medium. This allows pressure losses to be kept to a minimum. In addition, a check valve can also be used without issues with slightly contaminated media. Further specifications for the RK104 can be found in the right-hand column. We offer a wide range of non-return valves. Our sales team will be happy to advise you in finding the right non-return valve for your application.      <\/p>\n\n<h4>Check Valve RK104-MMNOI (Item no.: 301-1052-xx)<\/h4>\n<ul>\n \t<li>3\/8\u2033, 1\/2\u2033, 3\/4\u2033, 1\u2033, 1 1\/4\u2033, 1 1\/2\u2033, 2\u2033<\/li>\n \t<li>Body: Brass<\/li>\n \t<li>Disc: Brass<\/li>\n \t<li>Seal: NBR<\/li>\n \t<li>Temperature range: -10\u00b0C to +90\u00b0C<\/li>\n \t<li>Connection: ISO 228\/1<\/li>\n<\/ul>\n<h4>Check Valve RK104-MMMOI (Item no.: 301-1053-xx)<\/h4>\n<ul>\n \t<li>3\/8\u2033, 1\/2\u2033, 3\/4\u2033, 1\u2033, 1 1\/4\u2033, 1 1\/2\u2033, 2\u2033, 2 1\/2\u2033, 3\u2033, 4\u2033<\/li>\n \t<li>Body: Brass<\/li>\n \t<li>Disc: Brass<\/li>\n \t<li>Seal: Metal<\/li>\n \t<li>Temperature range: -10\u00b0C to +90\u00b0C<\/li>\n \t<li>Connection: ISO 228\/1<\/li>\n<\/ul>","product_short_desc":"Brass check valve with NBR seal and threaded connection","shop_link":"https:\/\/fergo.shop\/Rueckschlagklappe","technische_daten_tabellen_repeater":[{"tabellen_label":"Technical Specifications","technische_daten_repeater":[{"column_left":"Type","column_right":"Check valve","product_fact_display":"none","product_fact_order":"","shorten":false},{"column_left":"Sizes","column_right":"3\/8\" - 4\"","product_fact_display":"top","product_fact_order":1,"shorten":false},{"column_left":"Thread","column_right":"ISO 228","product_fact_display":"top","product_fact_order":2,"shorten":false},{"column_left":"Case material","column_right":"Brass","product_fact_display":"top","product_fact_order":3,"shorten":false},{"column_left":"Flap","column_right":"Brass","product_fact_display":"none","product_fact_order":"","shorten":false},{"column_left":"Flap seal","column_right":"Metal","product_fact_display":"top","product_fact_order":4,"shorten":false},{"column_left":"Pressure range","column_right":"PN10, PN8, PN12","product_fact_display":"none","product_fact_order":"","shorten":false},{"column_left":"Dichtung","column_right":"NBR","product_fact_display":"none","product_fact_order":"","shorten":false},{"column_left":"Connection","column_right":"IT\/IT","product_fact_display":"none","product_fact_order":"","shorten":false}]}],"produkt_downloads":"<a href=\"https:\/\/www.fergo.eu\/wp-content\/uploads\/2019\/01\/RK104.pdf\">Download \"Check Valve RK104\"<\/a>","datenblaetter_repeater":[{"datenblatt":5775,"download_titel":"Download \"Check Valve RK104\""}],"variations_repeater":[{"variantion_titel":"Check Valve RK104-MMNOI-NBR","article_number":"","variantion_content":"<ul>\n \t<li>3\/8\u2033, 1\/2\u2033, 3\/4\u2033, 1\u2033, 1 1\/4\u2033, 1 1\/2\u2033, 2\u2033<\/li>\n \t<li>Body: Brass<\/li>\n \t<li>Disc: Brass<\/li>\n \t<li>Seal: NBR<\/li>\n \t<li>Temperature range: -10\u00b0C to +90\u00b0C<\/li>\n \t<li>Connection: ISO 228\/1<\/li>\n<\/ul>"},{"variantion_titel":"Check Valve RK104-MMMOI-Metal","article_number":"","variantion_content":"<ul>\n \t<li>3\/8\u2033, 1\/2\u2033, 3\/4\u2033, 1\u2033, 1 1\/4\u2033, 1 1\/2\u2033, 2\u2033, 2 1\/2\u2033, 3\u2033, 4\u2033<\/li>\n \t<li>Body: Brass<\/li>\n \t<li>Disc: Brass<\/li>\n \t<li>Seal: Metal<\/li>\n \t<li>Temperature range: -10\u00b0C to +90\u00b0C<\/li>\n \t<li>Connection: ISO 228\/1<\/li>\n<\/ul>"}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>RK104 Socket Check Valve \u2013 Brass with NBR Seal<\/title>\n<meta name=\"description\" content=\"Threaded check valve, connection: female thread ISO 228\/1, Body made of brass, disc made of brass, NBR seal, pressure range 0 \u2013 max. 12 bar\" \/>\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.fergo.eu\/en\/product\/socket-check-valve-rk104\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"RK104 Socket Check Valve \u2013 Brass with NBR Seal\" \/>\n<meta property=\"og:description\" content=\"Threaded check valve, connection: female thread ISO 228\/1, Body made of brass, disc made of brass, NBR seal, pressure range 0 \u2013 max. 12 bar\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fergo.eu\/en\/product\/socket-check-valve-rk104\/\" \/>\n<meta property=\"og:site_name\" content=\"High-Quality Industrial Fittings &amp; 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