{"id":24686,"date":"2021-11-05T09:30:05","date_gmt":"2021-11-05T08:30:05","guid":{"rendered":"https:\/\/nh-oring.de\/piston-seal-o-ring-encyclopedia\/"},"modified":"2025-05-07T12:30:19","modified_gmt":"2025-05-07T10:30:19","slug":"piston-seal-o-ring-encyclopedia","status":"publish","type":"page","link":"https:\/\/nh-oring.de\/en\/piston-seal-o-ring-encyclopedia\/","title":{"rendered":"Piston seal | O-ring encyclopedia"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"24686\" class=\"elementor elementor-24686 elementor-11375\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a66171b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a66171b\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-b516ab7\" data-id=\"b516ab7\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f19af7c elementor-widget elementor-widget-heading\" data-id=\"f19af7c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Piston seal<\/h1>\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<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-32e2b4e elementor-hidden-mobile\" data-id=\"32e2b4e\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-add5fcd elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"add5fcd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"fas fa-database\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-225520a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"225520a\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-fe073a4\" data-id=\"fe073a4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ec400e6 elementor-widget elementor-widget-heading\" data-id=\"ec400e6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span style=\"background-color:#fe5050;color: #ffffff;padding: 5px\">#1<\/span> What is a piston seal?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1dda941 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"1dda941\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-fc57c8e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"fc57c8e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-845861d\" data-id=\"845861d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-db68194 elementor-widget elementor-widget-text-editor\" data-id=\"db68194\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>O-rings can be installed in three different ways.<\/p><p><strong><span style=\"color: var( --e-global-color-text );\">1. Flange gasket<\/span><span style=\"color: var( --e-global-color-text );\"><br \/>2. Piston seal<br \/><\/span><span style=\"color: var( --e-global-color-text );\">3. Rod seal<\/span><\/strong><\/p><p><span style=\"color: var( --e-global-color-text );\">Definition of a piston seal: The groove is located in the inner part of a piston, for example, and the O-ring inside is pressed radially (pressing line is at 90\u00b0 to the axis).<\/span><\/p><p>In addition to the type of installation, a distinction is also made between static and dynamic applications.<\/p><p><strong>Static<\/strong> = Without movement<\/p><p><strong>Dynamic<\/strong>: With movement<\/p><p>Piston seals are very common in hydraulic cylinders, for example. Accordingly, the majority of piston seals are used as dynamic seals.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a43d2e1 elementor-widget elementor-widget-image\" data-id=\"a43d2e1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"807\" height=\"533\" src=\"https:\/\/nh-oring.de\/wp-content\/uploads\/2023\/04\/Stangendichtung-T1.png\" class=\"attachment-large size-large wp-image-23874\" alt=\"O-Ring verbaut als Stangendichtung\" srcset=\"https:\/\/nh-oring.de\/wp-content\/uploads\/2023\/04\/Stangendichtung-T1.png 807w, https:\/\/nh-oring.de\/wp-content\/uploads\/2023\/04\/Stangendichtung-T1-300x198.png 300w, https:\/\/nh-oring.de\/wp-content\/uploads\/2023\/04\/Stangendichtung-T1-768x507.png 768w\" sizes=\"(max-width: 807px) 100vw, 807px\" \/>\t\t\t\t\t\t\t\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f466cf4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f466cf4\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-bde0af8\" data-id=\"bde0af8\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-263c38d elementor-widget elementor-widget-heading\" data-id=\"263c38d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span style=\"background-color:#fe5050;color: #ffffff;padding: 5px\">#2<\/span> What must be observed with a piston seal?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f133d6d elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"f133d6d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ab4064a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ab4064a\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-98bcaa7\" data-id=\"98bcaa7\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a50a912 elementor-widget elementor-widget-text-editor\" data-id=\"a50a912\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>It is important to know that the groove space must be designed differently for the piston seal than is the case with the more common flange seal.<\/p>\n<p>The following table corresponds to the specifications of ISO 3601 section 2 and provides information on which O-ring is suitable for which installation space (groove).<\/p>\n<p><b>Legend to the table<\/b><br \/>All dimensions in mm<br \/>Thickness = cord thickness<br \/>NB = groove width<br \/>NT = groove depth<br \/>static = without movement<br \/>dynamic = with movement<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af5e186 elementor-widget elementor-widget-image\" data-id=\"af5e186\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"790\" height=\"776\" src=\"https:\/\/nh-oring.de\/wp-content\/uploads\/2021\/08\/Einbauraum-O-Ringe.png\" class=\"attachment-large size-large wp-image-23759\" alt=\"Einbaur\u00e4ume von O-Ringe nach ISO 3601\" srcset=\"https:\/\/nh-oring.de\/wp-content\/uploads\/2021\/08\/Einbauraum-O-Ringe.png 790w, https:\/\/nh-oring.de\/wp-content\/uploads\/2021\/08\/Einbauraum-O-Ringe-300x295.png 300w, https:\/\/nh-oring.de\/wp-content\/uploads\/2021\/08\/Einbauraum-O-Ringe-768x754.png 768w\" sizes=\"(max-width: 790px) 100vw, 790px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-02355b3 elementor-widget elementor-widget-text-editor\" data-id=\"02355b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Two things can be deduced from the table on closer inspection:<\/p>\n<p><b>1.<\/b>&nbsp;The groove width is slightly smaller for piston and rod seals. Accordingly, the O-ring is left a little less space in the groove.<\/p>\n<p><b>2.&nbsp;<\/b>The groove depth and thus the grouting is the same for all three static sealing cases. However, in a dynamic application, the groove is designed to be slightly deeper. This is because the compression should tend to be lower with a moving seal.<\/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>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Piston seal #1 What is a piston seal? O-rings can be installed in three different ways. 1. Flange gasket2. Piston seal3. Rod seal Definition of a piston seal: The groove is located in the inner part of a piston, for example, and the O-ring inside is pressed radially (pressing line is at 90\u00b0 to the &#8230; <a title=\"Piston seal | O-ring encyclopedia\" class=\"read-more\" href=\"https:\/\/nh-oring.de\/en\/piston-seal-o-ring-encyclopedia\/\" aria-label=\"Read more about Piston seal | O-ring encyclopedia\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-24686","page","type-page","status-publish"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Piston seal | Simply explained | The O-RING encyclopedia<\/title>\n<meta name=\"description\" content=\"Using O-rings as piston seals explained simply \u2705 O-ring lexicon \u2705 O-ring technical terms \u2705 The O-ring supplier \u2705 Click here!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nh-oring.de\/en\/piston-seal-o-ring-encyclopedia\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Piston seal | Simply explained | The O-RING encyclopedia\" \/>\n<meta property=\"og:description\" content=\"Using O-rings as piston seals explained simply \u2705 O-ring lexicon \u2705 O-ring technical terms \u2705 The O-ring supplier \u2705 Click here!\" \/>\n<meta property=\"og:url\" content=\"https:\/\/nh-oring.de\/en\/piston-seal-o-ring-encyclopedia\/\" \/>\n<meta property=\"og:site_name\" content=\"NH O-RING - 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