{"id":247,"date":"2018-02-09T15:09:37","date_gmt":"2018-02-09T14:09:37","guid":{"rendered":"http:\/\/vw-kern.at\/blog\/?p=247"},"modified":"2020-05-22T17:02:58","modified_gmt":"2020-05-22T15:02:58","slug":"sind-blaue-oder-schwarze-quad-ringe-besser","status":"publish","type":"post","link":"http:\/\/vw-kern.at\/blog\/en\/2018\/02\/09\/sind-blaue-oder-schwarze-quad-ringe-besser\/","title":{"rendered":"Are blue or black quad-rings better?"},"content":{"rendered":"<p><strong>Answer:<\/strong> Totally equal, you should better pay attention to other things&#8230;<!--more--><\/p>\n<p>A customer recently decided to get his VC professionaly serviced at our workshop, after a failed self repair. He sent us also his already purchased spare parts for the VC along.<\/p>\n<p>The X-Rings from the customer seemed strange to me, because of their blue color. (The VC of the T4-Syncro got also blue X-Rings). However, my expert in sealings assured me that the color is without any relevande and purely optical. The visible injection points means instead a poor quality, while good products have a smooth surface.<\/p>\n<p><strong>But it gets even better:<\/strong> After cleaning with kerosene the customer&#8217;s blue quad rings became partly black. The quad rings had just been painted blue, for optical reasons(!).<\/p>\n<figure id=\"attachment_248\" aria-describedby=\"caption-attachment-248\" style=\"width: 300px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/IMG_20180109_112254.jpg\"><img loading=\"lazy\" class=\"size-medium wp-image-248\" src=\"http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/IMG_20180109_112254-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/IMG_20180109_112254-300x225.jpg 300w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/IMG_20180109_112254-768x576.jpg 768w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/IMG_20180109_112254-1024x768.jpg 1024w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/IMG_20180109_112254-750x563.jpg 750w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/IMG_20180109_112254-400x300.jpg 400w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/IMG_20180109_112254-430x323.jpg 430w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/IMG_20180109_112254-150x113.jpg 150w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/IMG_20180109_112254-100x75.jpg 100w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/IMG_20180109_112254.jpg 1040w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-248\" class=\"wp-caption-text\"><strong>quad-rings in blue &amp; partly blue<\/strong><\/figcaption><\/figure>\n<p>In the picture above you can see on the left an original quad ring from the T4-Syncro and the cheap and painted one on the right.<\/p>\n<p>&nbsp;<\/p>\n<p>I also asked the importer of the cheap quad-ring about the basic rubber material:NBR = <strong>N<\/strong>itrile <strong>B<\/strong>utadiene <strong>R<\/strong>ubber<\/p>\n<p>NBR can&#8217;t be used as a sealing material in contact with silicon fluid in a VC for two reasons:<\/p>\n<ul>\n<li>NBR shrinks in contact with silicon fluid and gets leaky<\/li>\n<li>NBR has a maximum temperature of about 100\u00b0C &#8211; which is to less for a VC with a hump-temperature of 120-135\u00b0C<\/li>\n<\/ul>\n<figure id=\"attachment_249\" aria-describedby=\"caption-attachment-249\" style=\"width: 300px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/NBR2.jpg\"><img loading=\"lazy\" class=\"size-medium wp-image-249\" src=\"http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/NBR2-300x150.jpg\" alt=\"\" width=\"300\" height=\"150\" srcset=\"http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/NBR2-300x150.jpg 300w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/NBR2-768x383.jpg 768w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/NBR2-1024x511.jpg 1024w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/NBR2-750x374.jpg 750w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/NBR2-400x199.jpg 400w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/NBR2-430x214.jpg 430w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/NBR2-150x75.jpg 150w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/NBR2-100x50.jpg 100w, http:\/\/vw-kern.at\/blog\/wp-content\/uploads\/2018\/02\/NBR2.jpg 1504w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-249\" class=\"wp-caption-text\">sealing materials in combinaton with silicon fluid<\/figcaption><\/figure>\n<p>Both requirements are met by FKM (formerly FPM) which is better known under its brand name Viton\u00ae.<\/p>\n<p><strong>Conclusion:<\/strong> Better pay attention to other values than the color of quad-rings.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Antwort: V\u00f6llig egal, bei der Auswahl sollte man besser auf andere Dinge achten&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1,4],"tags":[],"translation":{"provider":"WPGlobus","version":"2.8.8","language":"en","enabled_languages":["de","en"],"languages":{"de":{"title":true,"content":true,"excerpt":false},"en":{"title":true,"content":true,"excerpt":false}}},"_links":{"self":[{"href":"http:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/posts\/247"}],"collection":[{"href":"http:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/comments?post=247"}],"version-history":[{"count":8,"href":"http:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/posts\/247\/revisions"}],"predecessor-version":[{"id":257,"href":"http:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/posts\/247\/revisions\/257"}],"wp:attachment":[{"href":"http:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/media?parent=247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/categories?post=247"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/vw-kern.at\/blog\/en\/wp-json\/wp\/v2\/tags?post=247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}