{"id":24071,"date":"2021-09-16T13:15:24","date_gmt":"2021-09-16T11:15:24","guid":{"rendered":"https:\/\/nh-oring.de\/compression-set-o-ring-lexicon\/"},"modified":"2025-05-07T12:22:52","modified_gmt":"2025-05-07T10:22:52","slug":"compression-set-o-ring-lexicon","status":"publish","type":"page","link":"https:\/\/nh-oring.de\/en\/compression-set-o-ring-lexicon\/","title":{"rendered":"Compression set | O-ring lexicon"},"content":{"rendered":"\t\t
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Compression set<\/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
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\n\t\t\t<\/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
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#1<\/span> What does the compression set stand for?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The compression set (DVR for short) provides information about the resilience of an O-ring. In other words, the extent to which an O-ring returns to its original round shape after the O-ring is no longer under pressure. <\/span><\/p>\n

The compression set is one of the most important specifications and can be found on every material data sheet. <\/span><\/p>\n

It is measured by pressing an O-ring or test specimen for a certain period of time at an elevated temperature. The O-ring is then released and the extent to which the O-ring has been permanently deformed is checked.<\/span><\/p>\n

How long the O-ring is pressed under temperature and how high the temperature must be is incomprehensibly not specified as a standard. This requires a critical eye on the part of the user or designer.<\/span><\/p>\n\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

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#2<\/span> What are suitable parameters for measuring the compression set?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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NBR<\/strong> = 22 hours \/ 100\u00b0C<\/span><\/p>

EPDM<\/strong> = 22 hours \/ 125\u00b0C<\/span><\/p>

EPDM<\/strong> peroxide cross-linked = 22 hours \/ 150\u00b0C<\/span><\/p>

SILICONE<\/strong> = 22 hours \/ 175\u00b0C<\/span><\/p>

FKM<\/strong> = 22 hours \/ 200\u00b0C<\/span><\/p>

FFKM<\/strong> = 70 hours \/ 200\u00b0C<\/span><\/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

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#2<\/span> What is a good value for a compression set?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\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
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A good compression set lies in usually between 10% and 25%. Above a value of 40%, it becomes critical for the longevity of the O-ring.<\/span><\/p>\n

Note<\/strong>: For O-rings made of pure PTFE or FEP encapsulated O-rings usually lack the specification of the
compression set, as the materials are not elastic and can be deformed after do not return to their shape after pressing.<\/span><\/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":"

Compression set #1 What does the compression set stand for? The compression set (DVR for short) provides information about the resilience of an O-ring. In other words, the extent to which an O-ring returns to its original round shape after the O-ring is no longer under pressure. The compression set is one of the most … 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-24071","page","type-page","status-publish"],"yoast_head":"\nCompression set in O-rings | O-ring lexicon<\/title>\n<meta name=\"description\" content=\"Compression set of O-rings 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\/compression-set-o-ring-lexicon\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Compression set in O-rings | O-ring lexicon\" \/>\n<meta property=\"og:description\" content=\"Compression set of O-rings 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\/compression-set-o-ring-lexicon\/\" \/>\n<meta property=\"og:site_name\" content=\"NH O-RING - 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