{"id":10680,"date":"2025-06-11T09:59:18","date_gmt":"2025-06-11T07:59:18","guid":{"rendered":"https:\/\/www.elfifiltration.com\/?post_type=product&#038;p=10680"},"modified":"2025-06-11T12:35:30","modified_gmt":"2025-06-11T10:35:30","slug":"cpa-composite-polyamide","status":"publish","type":"product","link":"https:\/\/www.elfifiltration.com\/en\/products\/membranes\/water-treatment\/cpa-composite-polyamide\/","title":{"rendered":"CPA (Composite Polyamide)"},"content":{"rendered":"\t\t<div data-elementor-type=\"product-post\" data-elementor-id=\"10680\" class=\"elementor elementor-10680 elementor-10679\" data-elementor-post-type=\"product\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f1a7740 e-flex e-con-boxed e-con e-parent\" data-id=\"f1a7740\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-a8a9cce e-con-full e-flex e-con e-child\" data-id=\"a8a9cce\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9716782 elementor-widget elementor-widget-text-editor\" data-id=\"9716782\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.23.0 - 05-08-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<h3>Setting the industry standard for the highest salt rejection rates<\/h3>\n<p>Ultrapure water is essential in several industrial applications. <strong>CPA RO membranes<\/strong> are regarded as the industry standard for <strong>all critical high purity applications<\/strong> \u2013 from pharmaceutical to power industry. <\/p>\n<p>CPA lines of spiral-wound RO membranes are available in a variety of sizes and deliver <strong>unmatched performance<\/strong> with the highest salt rejection rates for brackish water applications.<\/p>\n<p>High throughput, efficiency and cost-effectiveness make CPA membranes <strong>the best high-rejection brackish water RO membranes in the industry<\/strong>. Because of its exceptionally high salt rejection, CPA membranes are used in power generation, pharmaceutical, electronics and semiconductor industry. <\/p>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-fdd3648 e-flex e-con-boxed e-con e-parent\" data-id=\"fdd3648\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-27b2fde e-con-full e-flex e-con e-child\" data-id=\"27b2fde\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d49b183 elementor-widget elementor-widget-text-editor\" data-id=\"d49b183\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h3 style=\"text-align: center;\">SOLUTIONS<\/h3>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-15e11e2 elementor-widget elementor-widget-ld_tabs\" data-id=\"15e11e2\" data-element_type=\"widget\" data-widget_type=\"ld_tabs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"lqd-tabs lqd-tabs-style-9 d-flex  flex-column 15e11e2 lqd-nav-underline-\" data-tabs-options=\"{&quot;trigger&quot;:&quot;click&quot;}\">\n\n\t\t\t<nav class=\"lqd-tabs-nav-wrap mb-6\">\n\t\t\t\t<ul class=\"reset-ul lqd-tabs-nav d-flex align-items-center flex-wrap  pos-rel\" role=\"tablist\"><li data-controls=\"lqd-tab-2291\" role=\"presentation\" class=\"elementor-repeater-item-1acca6d active\"><a class=\"d-block\" href=\"#lqd-tab-2291\" data-bs-target=\"#lqd-tab-2291\" aria-expanded=\"false\" aria-controls=\"lqd-tab-2291\" role=\"tab\" data-toggle=\"tab\" data-bs-toggle=\"tab\"><span class=\"lqd-tabs-nav-txt\">CPA2-4040<\/span><\/a><\/li><li data-controls=\"lqd-tab-2292\" role=\"presentation\" class=\"elementor-repeater-item-168c878\"><a class=\"d-block\" href=\"#lqd-tab-2292\" data-bs-target=\"#lqd-tab-2292\" aria-expanded=\"false\" aria-controls=\"lqd-tab-2292\" role=\"tab\" data-toggle=\"tab\" data-bs-toggle=\"tab\"><span class=\"lqd-tabs-nav-txt\">CPA3<\/span><\/a><\/li><li data-controls=\"lqd-tab-2293\" role=\"presentation\" class=\"elementor-repeater-item-b2fcf71\"><a class=\"d-block\" href=\"#lqd-tab-2293\" data-bs-target=\"#lqd-tab-2293\" aria-expanded=\"false\" aria-controls=\"lqd-tab-2293\" role=\"tab\" data-toggle=\"tab\" data-bs-toggle=\"tab\"><span class=\"lqd-tabs-nav-txt\">CPA5<\/span><\/a><\/li><li data-controls=\"lqd-tab-2294\" role=\"presentation\" class=\"elementor-repeater-item-2d9f107\"><a class=\"d-block\" href=\"#lqd-tab-2294\" data-bs-target=\"#lqd-tab-2294\" aria-expanded=\"false\" aria-controls=\"lqd-tab-2294\" role=\"tab\" data-toggle=\"tab\" data-bs-toggle=\"tab\"><span class=\"lqd-tabs-nav-txt\">CPA6<\/span><\/a><\/li><li data-controls=\"lqd-tab-2295\" role=\"presentation\" class=\"elementor-repeater-item-112eb80\"><a class=\"d-block\" href=\"#lqd-tab-2295\" data-bs-target=\"#lqd-tab-2295\" aria-expanded=\"false\" aria-controls=\"lqd-tab-2295\" role=\"tab\" data-toggle=\"tab\" data-bs-toggle=\"tab\"><span class=\"lqd-tabs-nav-txt\">CPA7<\/span><\/a><\/li><\/ul>\t\t\t\t\t\t\t<\/nav>\n\n\t\t\t<div class=\"lqd-tabs-content pos-rel\"><div id=\"lqd-tab-2291\" role=\"tabpanel\" class=\"lqd-tabs-pane fade active in\"><p>CPA2-4040 is a high rejection RO membrane, available in a diameter of 4 inches.<\/p><table class=\"dcf-table dcf-table-responsive dcf-table-bordered dcf-table-striped dcf-w-100%\"><thead><tr><th scope=\"col\">Product Name<\/th><th scope=\"col\">Dimensions<\/th><th scope=\"col\">Download<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">CPA2-4040<\/th><td data-label=\"Dimensioni \">4\u2033 diameter &amp; 40\u2033 lenght<\/td><td data-label=\"Download\"><a href=\"https:\/\/www.elfifiltration.com\/schede\/membrane\/CPA2-4040.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Technical Sheet<\/strong><\/a><\/td><\/tr><\/tbody><\/table> <\/div><div id=\"lqd-tab-2292\" role=\"tabpanel\" class=\"lqd-tabs-pane fade\"><p><strong>CPA3<\/strong> is the third generation CPA high rejection brackish water RO membrane introduced in the late 1990\u2019s. This membrane at <strong>99.7% rejection<\/strong> is an upgrade to the CPA2 with 10% more membrane area (400 square feet). This resulted in reduced capital costs by requiring fewer pressure vessels and less floor space.<br>CPA3 membranes also have a thicker (34 mil) feed spacer that exhibits higher tolerance to feed water suspended solids. CPA3 membrane is available in diameters of 8.0 inches.    <\/p><table class=\"dcf-table dcf-table-responsive dcf-table-bordered dcf-table-striped dcf-w-100%\"><thead><tr><th scope=\"col\">Product Name<\/th><th scope=\"col\">Dimensions<\/th><th scope=\"col\">Download<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">CPA3<\/th><td data-label=\"Dimensioni \">8\u2033 diameter &amp; 40\u2033 lenght<\/td><td data-label=\"Download\"><a href=\"https:\/\/www.elfifiltration.com\/schede\/membrane\/CPA3.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Technical Sheet<\/strong><\/a><\/td><\/tr><\/tbody><\/table> <\/div><div id=\"lqd-tab-2293\" role=\"tabpanel\" class=\"lqd-tabs-pane fade\"><p><strong>CPA5-LD<\/strong> is the fourth generation CPA high rejection brackish water RO membrane. This 400 sq. ft. membrane with 99.7% rejection was an upgrade to the CPA3 membrane as it is designed with <strong>Low Differential Pressure LDTM<\/strong>. It offers the improved rejection of all ions including silica and nitrates.<br>CPA5-LD membranes use a patented 34 mil <strong>thickness feed spacer<\/strong> that increases effectiveness of membrane cleaning. As a result, the CPA5-LD membrane does not need to be cleaned frequently \u2013 thus reducing treatment cost \u2013 while offering extreme durability and consistent performance. <strong>CPA5-MAX<\/strong> membranes have 440 square feet of membrane area and are well suited for <strong>polishing<\/strong> RO and low fouling applications. This increased membrane area can reduce capital costs by requiring fewer pressure vessels and less floor space. <strong>CPA5-LD<\/strong> membrane is available in diameters of <strong>4.0 and 8.0 inches<\/strong> and the <strong>CPA5-MAX<\/strong> membrane is available in <strong>8.0 inch diameter<\/strong>.        <\/p><table class=\"dcf-table dcf-table-responsive dcf-table-bordered dcf-table-striped dcf-w-100%\"><thead><tr><th scope=\"col\">Product Name<\/th><th scope=\"col\">Dimensions<\/th><th scope=\"col\">Download<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">CPA5-LD-4040<\/th><td data-label=\"Dimensioni \">4\u2033 diameter &amp; 40\u2033 lenght<\/td><td data-label=\"Download\"><a href=\"https:\/\/www.elfifiltration.com\/schede\/membrane\/CPA5-LD-4040.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Technical Sheet<\/strong><\/a><\/td><\/tr><tr><th scope=\"row\">CPA5-LD<\/th><td data-label=\"Dimensioni \">8\u2033 diameter &amp; 40\u2033 lenght<\/td><td data-label=\"Download\"><a href=\"https:\/\/www.elfifiltration.com\/schede\/membrane\/CPA5-LD.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Technical Sheet<\/strong><\/a><\/td><\/tr><tr><th scope=\"row\">CPA5 MAX<\/th><td data-label=\"Dimensioni \">8\u2033 diameter &amp; 40\u2033 lenght<\/td><td data-label=\"Download\"><a href=\"https:\/\/www.elfifiltration.com\/schede\/membrane\/CPA5-MAX.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Technical Sheet<\/strong><\/a><\/td><\/tr><\/tbody><\/table> <\/div><div id=\"lqd-tab-2294\" role=\"tabpanel\" class=\"lqd-tabs-pane fade\"><p><strong>CPA6-LD<\/strong> is the fifth generation CPA brackish water RO membrane and has the best rejection of all of its predecessors at 99.8%. This 400 sq. ft. membrane operates at a higher feed pressure than CPA5-LD but it has the highest rejection in the CPA family.<br>CPA6-LD membranes are designed with <strong>Low Differential Pressure LDTM<\/strong> Technology designed to minimize colloidal fouling. They have 37.0 m2 (400 ft2) membrane area. Using CPA6-LD results in cost saving while still getting a high rejection from membranes. <strong>CPA6-MAX<\/strong> has the same high rejection membrane of CPA6-LD, but features a <strong>10% increase in membrane area<\/strong> at 440 sq.ft. CPA6 MAX is a preferred choice for <strong>feed waters of low turbidity and silt density index<\/strong> such as brackish well waters. CPA6-LD and CPA6-MAX membranes are available in diameters of 8.0 inches only.       <\/p><table class=\"dcf-table dcf-table-responsive dcf-table-bordered dcf-table-striped dcf-w-100%\"><thead><tr><th scope=\"col\">Product Name<\/th><th scope=\"col\">Dimensions<\/th><th scope=\"col\">Download<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">CPA6-LD<\/th><td data-label=\"Dimensioni \">8\u2033 diameter &amp; 40\u2033 lenght<\/td><td data-label=\"Download\"><a href=\"https:\/\/www.elfifiltration.com\/schede\/membrane\/CPA6-LD.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Technical Sheet<\/strong><\/a><\/td><\/tr><tr><th scope=\"row\">CPA6-MAX<\/th><td data-label=\"Dimensioni \">8\u2033 diameter &amp; 40\u2033 lenght<\/td><td data-label=\"Download\"><a href=\"https:\/\/www.elfifiltration.com\/schede\/membrane\/CPA6-MAX.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Technical Sheet<\/strong><\/a><\/td><\/tr><\/tbody><\/table> <\/div><div id=\"lqd-tab-2295\" role=\"tabpanel\" class=\"lqd-tabs-pane fade\"><p>The <strong>CPA7<\/strong> series are the newest CPA brackish water RO membranes offering the highest salt rejection in the industry. These ultra-high rejection RO membranes are meant to fulfil your <strong>purest water quality requirements<\/strong>.<br>Where ultra-high purity water is required under difficult water conditions, the CPA7 membranes supply the best combination of <strong>high rejection and high flow capability<\/strong> in a brackish water RO element, compared to all commercial brackish water RO elements The LD variant of these membranes using <strong>LD Technology\u00ae<\/strong> are available in 4\u201d <strong>(CPA7-LD-4040)<\/strong> and 8\u201d <strong>(CPA7-LD)<\/strong> diameters. The <strong>CPA7 MAX<\/strong> membrane has an active membrane surface area of 440 ft2 (40.9 m2) which reduces capital costs by requiring fewer pressure vessels and lesser floor space.    <\/p><table class=\"dcf-table dcf-table-responsive dcf-table-bordered dcf-table-striped dcf-w-100%\"><thead><tr><th scope=\"col\">Product Name<\/th><th scope=\"col\">Dimensions<\/th><th scope=\"col\">Download<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">CPA7-LD-4040<\/th><td data-label=\"Dimensioni \">4\u2033 diameter &amp; 40\u2033 lenght<\/td><td data-label=\"Download\"><a href=\"https:\/\/www.elfifiltration.com\/schede\/membrane\/CPA7-LD-4040.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Technical Sheet<\/strong><\/a><\/td><\/tr><tr><th scope=\"row\">CPA7-LD<\/th><td data-label=\"Dimensioni \">8\u2033 diameter &amp; 40\u2033 lenght<\/td><td data-label=\"Download\"><a href=\"https:\/\/www.elfifiltration.com\/schede\/membrane\/CPA7-LD.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Technical Sheet<\/strong><\/a><\/td><\/tr><tr><th scope=\"row\">CPA7 MAX<\/th><td data-label=\"Dimensioni \">8\u2033 diameter &amp; 40\u2033 lenght<\/td><td data-label=\"Download\"><a href=\"https:\/\/www.elfifiltration.com\/schede\/membrane\/CPA7-MAX.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Technical Sheet<\/strong><\/a><\/td><\/tr><\/tbody><\/table> <\/div><\/div>\n\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p data-start=\"88\" data-end=\"528\">Ultrapure water is essential in several industrial applications. CPA RO membranes are regarded as the industry standard for all critical high purity applications \u2013 from pharmaceutical to power industry. CPA lines of spiral-wound RO membranes are available in a variety of sizes and deliver unmatched performance with the highest salt rejection rates.<\/p>\n","protected":false},"featured_media":10708,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_cat":[211,214],"product_tag":[],"class_list":{"0":"post-10680","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-membranes","7":"product_cat-water-treatment","9":"first","10":"instock","11":"shipping-taxable","12":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>CPA (Composite Polyamide) | Elfi Filtration<\/title>\n<meta name=\"description\" content=\"CPA RO membranes are regarded as the industry standard for all critical high purity applications \u2013 from pharmaceutical to power industry.\" \/>\n<meta name=\"robots\" content=\"index, follow, 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