{"id":541,"date":"2023-01-10T23:49:20","date_gmt":"2023-01-10T23:49:20","guid":{"rendered":"https:\/\/graywolfslair.com\/?p=541"},"modified":"2023-04-05T20:58:14","modified_gmt":"2023-04-05T20:58:14","slug":"15-11-convert-ext-420-to-selectable-single-or-double-stage-operation","status":"publish","type":"post","link":"https:\/\/graywolfslair.com\/index.php\/15-diy-equipment\/15-11-convert-ext-420-to-selectable-single-or-double-stage-operation\/","title":{"rendered":"15.11 Convert EXT-420 to selectable single or double stage operation"},"content":{"rendered":"\n<p>Haskel now offers their EXT-420 plumbed so that you can run it in either single or double stage, depending on where volume or pressure are required.&nbsp; They did so using check valves and a single two way valve.<\/p>\n\n\n\n<p>For ya&#8217;ll who have the 59025-3 or standard EXT-420, here is how WolfWurx made them selectable using two three way valves.&nbsp; Two valves to switch instead of one, but ostensibly avoids the pressure losses that accompany spring checks.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"525\" height=\"313\" src=\"https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/Schematic-jpg.webp?resize=525%2C313&#038;ssl=1\" alt=\"\" class=\"wp-image-1737\" srcset=\"https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/Schematic-jpg.webp?w=640&amp;ssl=1 640w, https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/Schematic-jpg.webp?resize=300%2C179&amp;ssl=1 300w, https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/Schematic-jpg.webp?resize=600%2C358&amp;ssl=1 600w\" sizes=\"auto, (max-width: 525px) 100vw, 525px\" \/><\/figure>\n\n\n\n<p><strong>Plumbing schematic<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/web.archive.org\/web\/20211026135042im_\/https%3A\/\/graywolfslair.com\/images\/Converted.jpg?w=525&#038;ssl=1\" alt=\"\"\/><\/figure>\n\n\n\n<p><strong>Converted Haskel EXT-420<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Haskel now offers their EXT-420 plumbed so that you can run it in either single or double stage, depending on where volume or pressure are [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[50],"tags":[],"class_list":["post-541","post","type-post","status-publish","format-standard","hentry","category-15-diy-equipment"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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We automated the extraction sequence on the Mk II using a programable controller\u2026","rel":"","context":"In &quot;15. DIY Equipment&quot;","block_context":{"text":"15. DIY Equipment","link":"https:\/\/graywolfslair.com\/index.php\/category\/15-diy-equipment\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/05\/Automated-valves-jpg.webp?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/05\/Automated-valves-jpg.webp?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/05\/Automated-valves-jpg.webp?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":515,"url":"https:\/\/graywolfslair.com\/index.php\/15-diy-equipment\/15-1-the-history-of-the-terpenator-according-to-gospel\/","url_meta":{"origin":541,"position":1},"title":"15.1 The History of the Terpenator According to Gospel","author":"GrayWolf","date":"January 10, 2023","format":false,"excerpt":"Success has many fathers, while failure is often a bastard child, so stories abound about how closed loop BHO extraction got started.\u00a0 Truth is also shorter than fiction, so let me share my perspective to consider with the rest. I didn't invent the concept, but instead got my inspiration 07-26-2009,\u2026","rel":"","context":"In &quot;15. DIY Equipment&quot;","block_context":{"text":"15. DIY Equipment","link":"https:\/\/graywolfslair.com\/index.php\/category\/15-diy-equipment\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/05\/Mk-VII-conceptual-jpg.webp?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/05\/Mk-VII-conceptual-jpg.webp?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/05\/Mk-VII-conceptual-jpg.webp?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":582,"url":"https:\/\/graywolfslair.com\/index.php\/15-diy-equipment\/15-31-lets-discuss-universal-pump-laws\/","url_meta":{"origin":541,"position":2},"title":"15.31 Let\u2019s discuss universal pump laws!","author":"GrayWolf","date":"January 11, 2023","format":false,"excerpt":"There is a lot of discussion about which recovery pump is best suited for our application and my first thought is to ask which one of our applications?? \u00a0\u00a0Different processes and budgets have different needs. While our industry got started using pumps designed for refrigeration recovery and from those humble\u2026","rel":"","context":"In &quot;15. DIY Equipment&quot;","block_context":{"text":"15. DIY Equipment","link":"https:\/\/graywolfslair.com\/index.php\/category\/15-diy-equipment\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":417,"url":"https:\/\/graywolfslair.com\/index.php\/13-certification\/13-1-certification\/","url_meta":{"origin":541,"position":3},"title":"13.1 Certification","author":"GrayWolf","date":"January 10, 2023","format":false,"excerpt":"With legalization comes regulation, and a current one is that the extraction equipment and the operating system that it is installed in, must meet ASME, IFC, IBC, IEC, and NFPA-58. Prior to that time I had the central Mk III, IV, and V Terpenators certified to ASME using R. Chilton,\u2026","rel":"","context":"In &quot;13. Certification&quot;","block_context":{"text":"13. Certification","link":"https:\/\/graywolfslair.com\/index.php\/category\/13-certification\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":565,"url":"https:\/\/graywolfslair.com\/index.php\/15-diy-equipment\/15-24-diy-scfe-co2\/","url_meta":{"origin":541,"position":4},"title":"15.24 DIY SCFE CO2","author":"GrayWolf","date":"January 11, 2023","format":false,"excerpt":"Sooooooo, why not passive SCFE CO2 extraction!\u00a0 The sabriousness of CO2 certainly makes it attractive, and C02 becomes supercritical at only about 31C\/87.8F at 1073 psi\/7.38MPa. Just too too bad that the equipment is so expensive, compared to some of the other extraction methods, that it is pretty much priced\u2026","rel":"","context":"In &quot;15. DIY Equipment&quot;","block_context":{"text":"15. 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