{"id":5147,"date":"2025-09-04T09:15:11","date_gmt":"2025-09-04T09:15:11","guid":{"rendered":"https:\/\/www.vr-dichtungen.com\/?p=5147"},"modified":"2025-09-04T09:44:23","modified_gmt":"2025-09-04T09:44:23","slug":"hnbr-radial-shaft-seals-in-automatic-coffee-machines","status":"publish","type":"post","link":"https:\/\/www.vr-dichtungen.com\/en\/hnbr-radial-shaft-seals-in-automatic-coffee-machines\/","title":{"rendered":"HNBR Radial Shaft Seals in Automatic Coffee Machines:"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"h-how-they-handle-cleaning-agents\">How They Handle Cleaning Agents<\/h2>\n\n\n\n<p><strong>Summary:<\/strong> With the right compound, HNBR radial shaft seals offer reliable performance in super\u2011automatic coffee machines\u2014even through regular cleaning cycles. Here\u2019s what to consider when cleaners, descalers and steam meet elastomers.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-what-s-inside-coffee-machine-cleaners\">What\u2019s inside \u201ccoffee machine cleaners\u201d?<\/h3>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>Most tabs and powders combine <strong>alkaline builders<\/strong> (e.g., sodium carbonate), <strong>oxygen\u2011based oxidizers<\/strong> (typically <strong>sodium percarbonate<\/strong>, which releases hydrogen peroxide in water), and sometimes <strong>organic acids<\/strong> (e.g., citric acid) in descalers. These chemistries cut coffee oils and scale\u2014and they matter for seal selection.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"640\" height=\"427\" src=\"https:\/\/www.vr-dichtungen.com\/wp-content\/uploads\/2025\/09\/coffee-4334647_640.jpg\" alt=\"coffee machine\" class=\"wp-image-5155\" srcset=\"https:\/\/www.vr-dichtungen.com\/wp-content\/uploads\/2025\/09\/coffee-4334647_640.jpg 640w, https:\/\/www.vr-dichtungen.com\/wp-content\/uploads\/2025\/09\/coffee-4334647_640-300x200.jpg 300w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-hnbr-is-a-strong-default\">Why HNBR is a strong default<\/h2>\n\n\n\n<p>VR\u2019s <strong>peroxide\u2011cured HNBR<\/strong> shows <strong>very good resistance to hot water\/steam<\/strong> and to <strong>dilute acids and bases<\/strong>\u2014a close match to typical cleaning and descaling media. The standard operating window is about <strong>\u201340 to +150\u202f\u00b0C<\/strong>. In food settings, HNBR is widely used because it tolerates the detergents and disinfectants commonly applied during cleaning.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-when-to-prefer-fkm\">When to prefer FKM<\/h3>\n\n\n\n<p>If your design exposes the seal lip <strong>frequently and at high temperature<\/strong> to oxidizing cleaners (oxygen\u2011bleach chemistry), consider <strong>peroxide\u2011cured FKM<\/strong>. It is explicitly rated for <strong>hot water\/steam<\/strong> service and offers <strong>expanded chemical resistance<\/strong>, with a material range up to ~<strong>220\u202f\u00b0C<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-epdm-for-water-steam-if-there-s-no-oil\">EPDM for water\/steam\u2014if there\u2019s no oil<\/h3>\n\n\n\n<p><strong>Peroxide\u2011cured EPDM<\/strong> excels in <strong>hot water and steam (\u2248140\u202f\u00b0C steam)<\/strong> but is <strong>not compatible with mineral oils or hydrocarbons<\/strong>; use <strong>silicone\u2011based greases only<\/strong> where lubrication is needed. This makes EPDM a good choice for purely aqueous systems.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-design-amp-operation-tips-that-extend-seal-life\">Design &amp; operation tips that extend seal life<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Keep the jet off the lip.<\/strong> Avoid directing concentrated cleaner onto the contact zone; allow rinse water to remove residues. (Media\u2014including <strong>cleaning agents<\/strong>\u2014should be part of material selection and design considerations.)<\/li>\n\n\n\n<li><strong>Dose and rinse.<\/strong> Follow the cleaner manufacturer\u2019s dosage and cycle times and ensure a thorough water rinse to limit oxidative load. <\/li>\n\n\n\n<li><strong>Check lubricant compatibility.<\/strong> Seal lips and lubricants must be chemically compatible to prevent hardening\/softening over time.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-why-vr-seals-are-a-good-match-for-compact-appliances\">Why VR seals are a good match for compact appliances<\/h3>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>VR radial shaft seals use a <strong>spring\u2011less membrane<\/strong> design. In comparative testing they require only <strong>one\u2011third to one\u2011quarter of the radial force<\/strong> of spring\u2011loaded elements at equal sealing performance\u2014reducing frictional losses and heat, which is valuable in small drives and tight spaces.<br>(And yes, VR seals are already used in <strong>household machines<\/strong>, among many other applications.)<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"640\" height=\"427\" src=\"https:\/\/www.vr-dichtungen.com\/wp-content\/uploads\/2025\/09\/coffee-2608864_640.jpg\" alt=\"Coffee on a tabel - VR Dichtungen\" class=\"wp-image-5159\" srcset=\"https:\/\/www.vr-dichtungen.com\/wp-content\/uploads\/2025\/09\/coffee-2608864_640.jpg 640w, https:\/\/www.vr-dichtungen.com\/wp-content\/uploads\/2025\/09\/coffee-2608864_640-300x200.jpg 300w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-quick-selection-snapshot\">Quick selection snapshot<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>HNBR (peroxide):<\/strong> hot water\/steam + dilute acids\/bases; \u201340\u2026+150\u202f\u00b0C. Default choice for most super\u2011automatic coffee machine sealing points.<\/li>\n\n\n\n<li><strong>FKM\/P (peroxide\u2011cured):<\/strong> hot water\/steam + broader chemical\/oxidation resistance; up to ~220\u202f\u00b0C. For aggressive cleaning regimes.<\/li>\n\n\n\n<li><strong>EPDM (peroxide):<\/strong> excellent in hot water\/steam (\u2248140\u202f\u00b0C) without oils; silicone grease only.<\/li>\n<\/ul>\n\n\n\n<p>All materials are available in certified food quality.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How They Handle Cleaning Agents Summary: With the right compound, HNBR radial shaft seals offer reliable performance in super\u2011automatic coffee machines\u2014even through regular cleaning cycles. Here\u2019s what to consider when cleaners, descalers and steam meet elastomers. What\u2019s inside \u201ccoffee machine cleaners\u201d? Most tabs and powders combine alkaline builders (e.g., sodium carbonate), oxygen\u2011based oxidizers (typically sodium [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5150,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"knowledge-article","footnotes":""},"categories":[21],"tags":[],"class_list":["post-5147","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.1 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>HNBR Radial Shaft Seals in Automatic Coffee Machines: - VR Dichtungen<\/title>\n<meta name=\"description\" content=\"Explore the benefits of HNBR seals in automatic coffee machines for reliable performance and effective cleaning cycles.\" \/>\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.vr-dichtungen.com\/en\/hnbr-radial-shaft-seals-in-automatic-coffee-machines\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HNBR Radial Shaft Seals in Automatic Coffee Machines:\" \/>\n<meta property=\"og:description\" content=\"Explore the benefits of HNBR seals in automatic coffee machines for reliable performance and effective cleaning cycles.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.vr-dichtungen.com\/en\/hnbr-radial-shaft-seals-in-automatic-coffee-machines\/\" \/>\n<meta property=\"og:site_name\" content=\"VR Dichtungen\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-04T09:15:11+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-09-04T09:44:23+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.vr-dichtungen.com\/wp-content\/uploads\/2025\/09\/ai-generated-8723334_640.png\" \/>\n\t<meta property=\"og:image:width\" content=\"640\" \/>\n\t<meta property=\"og:image:height\" content=\"640\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Patrick\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Patrick\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.vr-dichtungen.com\\\/en\\\/hnbr-radial-shaft-seals-in-automatic-coffee-machines\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.vr-dichtungen.com\\\/en\\\/hnbr-radial-shaft-seals-in-automatic-coffee-machines\\\/\"},\"author\":{\"name\":\"Patrick\",\"@id\":\"https:\\\/\\\/www.vr-dichtungen.com\\\/en\\\/#\\\/schema\\\/person\\\/7683b092593665132a124dd28ef309aa\"},\"headline\":\"HNBR Radial Shaft Seals in Automatic Coffee Machines:\",\"datePublished\":\"2025-09-04T09:15:11+00:00\",\"dateModified\":\"2025-09-04T09:44:23+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.vr-dichtungen.com\\\/en\\\/hnbr-radial-shaft-seals-in-automatic-coffee-machines\\\/\"},\"wordCount\":466,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.vr-dichtungen.com\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.vr-dichtungen.com\\\/en\\\/hnbr-radial-shaft-seals-in-automatic-coffee-machines\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.vr-dichtungen.com\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/ai-generated-8723334_640.png\",\"articleSection\":[\"Technology\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.vr-dichtungen.com\\\/en\\\/hnbr-radial-shaft-seals-in-automatic-coffee-machines\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.vr-dichtungen.com\\\/en\\\/hnbr-radial-shaft-seals-in-automatic-coffee-machines\\\/\",\"url\":\"https:\\\/\\\/www.vr-dichtungen.com\\\/en\\\/hnbr-radial-shaft-seals-in-automatic-coffee-machines\\\/\",\"name\":\"HNBR Radial Shaft Seals in Automatic Coffee Machines: - 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