{"id":7493,"date":"2020-04-03T14:54:21","date_gmt":"2020-04-03T12:54:21","guid":{"rendered":"https:\/\/www.tempco.it\/blog\/?p=7493"},"modified":"2020-04-03T15:05:29","modified_gmt":"2020-04-03T13:05:29","slug":"oil-viscosity-grade-in-plate-heat-exchangers-design","status":"publish","type":"post","link":"https:\/\/www.tempco.it\/blog\/en\/7493\/oil-viscosity-grade-in-plate-heat-exchangers-design\/","title":{"rendered":"Oil viscosity grade in plate heat exchangers design"},"content":{"rendered":"<p><a href=\"https:\/\/en.tempco.it\/solutions-en\/heat-exchangers\/\" target=\"_blank\" rel=\"noopener\"><strong>Plate heat exchangers<\/strong><\/a>, but <a href=\"https:\/\/en.tempco.it\/solutions-en\/heat-exchangers\/shell-and-tube-heat-exchangers\/\" target=\"_blank\" rel=\"noopener\">shell and tube exchangers<\/a> as well, are widely employed in <a href=\"https:\/\/www.tempco.it\/blog\/en\/7405\/how-to-calculate-the-amount-of-heat-to-dissipate-in-hydraulic-power-units\/\" target=\"_blank\" rel=\"noopener\"><strong>oil cooling for hydraulic units<\/strong><\/a> and plants. A main factor to consider in this kind of applications is the <strong>viscosity grade of the oil<\/strong>, a crucial element in the sizing process of the heat exchanger. For <strong>engine oils<\/strong>, the viscosity is usually expressed in <strong>SAE grades<\/strong>, while <strong>hydraulic oils<\/strong> use <strong>ISO-VG classification<\/strong>, indicating the oil viscosity grade.<\/p>\n<p>Higher viscosity grade oils involve <strong>higher pressure drops<\/strong> inside the exchanger, which must be considered during the design of the heat exchanger, in order to avoid problems with the pump that ensures oil circulation within the exchanger.<\/p>\n<p>When working with <strong>high viscosity grade oils<\/strong>, for instance ISO-VG 320 or ISO-VG 220, typically <strong>lubricating oils<\/strong>, it is mandatory to use <strong>gear pumps<\/strong>, thus with high pressures, that allow higher pressure drops inside the exchangers, even up to 1,5 bar or 2,5 bar.<\/p>\n<p><iframe loading=\"lazy\" width=\"750\" height=\"422\" src=\"https:\/\/www.youtube.com\/embed\/nMjaisG4eJM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p>&nbsp;<\/p>\n<p>In case of <strong>lower viscosity grade oils<\/strong>, typically employed in <strong>drive hydraulic plants<\/strong>, with viscosity grade such as ISO-VG 46 or ISO-VG 68, pressure drops can be even lower, in the measure of 1 or 1,5 bar, because the oil is less viscous and therefore smoother, leading to <strong>lower pressure drops<\/strong> inside the heat exchanger.<\/p>\n<p>Subscribe here to our <strong><a href=\"https:\/\/en.tempco.it\/newsletter-solid-temperature\/\" target=\"_blank\" rel=\"noopener\">Tempco Newsletter &#8211; Solid Temperature<\/a><\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Viscosity grade of lubricating oils and hydraulic oils is a crucial factor in the sizing process of heat exchangers, taking account of related pressure drops in oil cooling for hydraulics applications.<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[64,61,63,113,473],"tags":[127,923,2216,138,1874,447,2213,2133,1581,1466,2217,123,1563,1556,727,2212,1627,1543,2218],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.5 - 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