{"id":551,"date":"2015-12-18T09:20:09","date_gmt":"2015-12-18T08:20:09","guid":{"rendered":"https:\/\/termen.pl\/?page_id=551"},"modified":"2020-08-19T07:37:35","modified_gmt":"2020-08-19T05:37:35","slug":"selecting-strainers","status":"publish","type":"page","link":"https:\/\/termen.pl\/en\/for-engineers\/selecting-strainers","title":{"rendered":"Selecting strainers"},"content":{"rendered":"<h2><\/h2>\n<p><img decoding=\"async\" class=\"aligncenter img-fluid\" src=\"https:\/\/termen.pl\/pliki\/tabels\/dobor-fm-1.png\" alt=\"filtroodmulnik\"><\/p>\n<p><strong>Relations:<\/strong><\/p>\n<p><strong>&nbsp;<\/strong><\/p>\n<ol>\n<li>Water flow ratio at the strainer at \u0394p = p<sub>1<\/sub> \u2013 p<sub>2<\/sub> = 1 bar pressure loss:<\/li>\n<\/ol>\n<p><img decoding=\"async\" src=\"https:\/\/termen.pl\/pliki\/tabels\/dobor-fm-wzo1.png\" alt=\"wz\u00f3r\"><\/p>\n<ol start=\"2\">\n<li>Pressure loss at the strainer:<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/termen.pl\/pliki\/tabels\/dobor-fm-wzo2.png\" alt=\"wz\u00f3r\" width=\"211\" height=\"90\"><\/p>\n<p>Note: Select the strainer based on the nominal line diameter for flow rates up to 1 m\/s.<\/p>\n<p><strong>Quantities and units:<\/strong><\/p>\n<p>Kv<sub>s<\/sub>&nbsp;&nbsp;&nbsp; m<sup>3<\/sup>\/h&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#8211;&nbsp;flow ratio for different strainer diameters<\/p>\n<p>Q&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; m<sup>3<\/sup>\/h&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#8211; flow rate<\/p>\n<p>p<sub>1<\/sub>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; bar&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#8211;&nbsp;absolute pressure upstream of the strainer<\/p>\n<p>p<sub>2<\/sub>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; bar&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#8211;&nbsp;absolute pressure downstream of the strainer<\/p>\n<p>\u0394p&nbsp;&nbsp;&nbsp;&nbsp; bar&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#8211; pressure drop at the strainer<\/p>\n<p>\u03c1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; kg\/m<sup>3<\/sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#8211;&nbsp;medium density at the strainer depending on p<sub>1<\/sub> and T<sub>1<\/sub><\/p>\n<hr>\n<p><strong>The strainer can be selected based on calculations or characteristic curves.<\/strong><\/p>\n<p><strong>&nbsp;<\/strong><\/p>\n<p><strong>CALCULATION<\/strong><\/p>\n<p><strong>&nbsp;<\/strong><\/p>\n<p><strong>&nbsp;<\/strong><\/p>\n<p>Determine the pressure loss between the inlet and outlet port of TerFOM 80 strainer based on the following data:<\/p>\n<p><strong>Data:<\/strong><\/p>\n<p>Q = 10 m<sup>3<\/sup>\/h&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; medium flow rate at the strainer<\/p>\n<p><strong>Procedure:<\/strong><\/p>\n<ol>\n<li>Determine flow ratio Kv<sub>s<\/sub>:<\/li>\n<\/ol>\n<p>From DN15-200 strainer data sheet<\/p>\n<p><strong>&nbsp;<\/strong><\/p>\n<p><strong>Specifications \/ Nominal diameter DN <\/strong>table<\/p>\n<p>&#8211; flow ratio for DN80 is Kv<sub>s<\/sub> = 126 m<sup>3<\/sup>\/h<\/p>\n<ol start=\"2\">\n<li>Determine pressure loss at the strainer:<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/termen.pl\/pliki\/tabels\/dobor-fm-wzo2.png\" alt=\"wz\u00f3r\" width=\"211\" height=\"90\"><\/p>\n<p><strong>Comments:<\/strong><\/p>\n<ol>\n<li>Table <strong>Technical specifications <\/strong>specifies Kv<sub>s<\/sub> flow ratio for each DN nominal diameter. Kv<sub>s <\/sub>flow ratio specifies water flow via strainer at 1 bar pressure loss between the inlet and outlet port.<\/li>\n<\/ol>\n<ol start=\"2\">\n<li>Use Kv<sub>s<\/sub> flow ratio for a specific DN nominal diameter and nominal medium flow rate to determine the pressure drop at the strainer. To simplify, the medium density \u03c1 for water is 1000 kg\/m3.<\/li>\n<\/ol>\n<p><strong>CHARACTERISTIC CURVE<\/strong><\/p>\n<h2><strong>&nbsp;<\/strong><\/h2>\n<p><strong>&nbsp;<\/strong><\/p>\n<p>Determine the pressure loss between the inlet and outlet port for TerFOM 80 strainer using the following data (example 1) from the strainer<\/p>\n<p><strong>&nbsp;<\/strong><\/p>\n<p><strong>Data:<\/strong><\/p>\n<p>Q = 10 m<sup>3<\/sup>\/h&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; medium flow rate at the strainer<\/p>\n<p><strong>Strainer performance<\/strong><br \/>\n<img decoding=\"async\" class=\"alignnone img-fluid\" src=\"https:\/\/termen.pl\/pliki\/tabels\/dobor-fm-wzo4.png\" alt=\"dob\u00f3r charakterystyki filtroodmulnik\u00f3w\"><\/p>\n<p><strong>Procedure:<\/strong><\/p>\n<ol>\n<li>Determine pressure loss at the strainer:<\/li>\n<\/ol>\n<p>From the strainer characteristic curve:<\/p>\n<p>&#8211; pressure loss at the strainer is \u0394p = 0.025 bar<\/p>\n<p><strong>Comments:<\/strong><\/p>\n<ol>\n<li>The characteristic curve shows the relation between the flow rate for each nominal diameter and the pressure loss.<\/li>\n<\/ol>\n<p>Mark a known flow rate Q at the characteristic curve and determine the pressure loss \u0394p between the inlet and outlet port.<\/p>\n<p>Zasady doboru urz\u0105dze\u0144 produkowanych przez TERMEN SA.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Relations: &nbsp; Water flow ratio at the strainer at \u0394p = p1 \u2013 p2 = 1 bar pressure loss: Pressure loss at the strainer: Note: Select the strainer based on the nominal line diameter for flow rates up to 1 m\/s. Quantities and units: Kvs&nbsp;&nbsp;&nbsp; m3\/h&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#8211;&nbsp;flow ratio for different strainer diameters Q&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; m3\/h&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#8211; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":449,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-551","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Selecting strainers - TERMEN<\/title>\n<meta name=\"description\" content=\"Dob\u00f3r filtroodmulnik\u00f3w, wzory tabele i przyk\u0142adowe obliczenia.\u00a0Nomogram charakterystyk hydraulicznych dla poszczeg\u00f3lnych \u015brednic nominalnych\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/termen.pl\/en\/for-engineers\/selecting-strainers\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Selecting strainers - 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