{"id":6603,"date":"2026-05-01T11:01:40","date_gmt":"2026-05-01T17:01:40","guid":{"rendered":"https:\/\/www.hitechseals.com\/?p=6603"},"modified":"2026-05-01T18:08:19","modified_gmt":"2026-05-02T00:08:19","slug":"case-studies-hnbr-slurry-pump-diaphragms","status":"publish","type":"post","link":"https:\/\/www.hitechseals.com\/case-studies-hnbr-slurry-pump-diaphragms\/","title":{"rendered":"Extending Slurry Pump Service Life with Custom HNBR Rubber &#038; Fabric Reinforced Diaphragms"},"content":{"rendered":"By <a href=\"https:\/\/www.linkedin.com\/in\/joshckelly\/\">Josh Kelly<\/a>, Sales Engineer\r\n\r\nThe <a href=\"https:\/\/www.hitechseals.com\/product\/diaphragm\/\">diaphragm<\/a> is a critical component of a diaphragm slurry pump, a type of positive displacement pump used to transport dense and abrasive mixtures of liquids and suspended solid particles, often known as slurry. The diaphragm is a flexible membrane that flexes back and forth to draw slurry into the pump chamber and push it out, while isolating the slurry from the pump\u2019s mechanical components.\r\n\r\nThis case study outlines how Hi-Tech Seals provided specialized HNBR diaphragms to reduce costly downtime and maintenance, all while improving the pump\u2019s service life.\r\n<h2><span style=\"font-size: 18pt;\"><strong>Customer Profile<\/strong><\/span><\/h2>\r\nThe customer provides millwright and on-site machining services for industries such as oil and gas, mining, power generation, pulp and paper, plastics, food, and steelmaking.\r\n<h2><span style=\"font-size: 18pt;\"><strong>Application<\/strong><\/span><\/h2>\r\n<p class=\"font-claude-response-body\"><span style=\"font-family: 'Arial',sans-serif;\">This diaphragm slurry pump used two flexible diaphragms positioned on either side of a central drive mechanism. The diaphragms flex in opposite directions: one chamber draws slurry through its inlet check valve while the other discharges through its outlet check valve. This isolates the slurry from the pump&#8217;s mechanical components.<\/span><\/p>\r\n<p class=\"font-claude-response-body\"><span style=\"font-family: 'Arial',sans-serif;\">The pump operates in cobalt and copper leaching, transferring saltwater slurry with abrasive coral particles.<\/span><\/p>\r\n\r\n<h2><span style=\"font-size: 18pt;\"><strong>The Challenge<\/strong><\/span><\/h2>\r\nThe diaphragms from previous suppliers could not withstand the abrasive nature of coral slurry. The material used was hydrogenated nitrile butadiene rubber (HNBR), and the reinforced fabric layer was not thick enough, wearing out within only 25 days. This drastically increased their operational costs as replacement diaphragms had to be ordered frequently. The supplier lead time was also a constraint, extending to nearly eleven months.\r\n<h2><span style=\"font-size: 18pt;\"><strong>Hi-Tech Seals Solution <\/strong><\/span><\/h2>\r\nOur engineering team worked closely with the customer to design and engineer diaphragms with a longer service life. The revised design doubled the thickness of the reinforced fabric layer and used an optimized HNBR compound selected to improve durability in the customer\u2019s abrasive slurry conditions.\r\n<h2><span style=\"font-size: 18pt;\"><strong>The Results<\/strong><\/span><\/h2>\r\nThe improved diaphragms increased service life from 25 days to 45-60 days, reducing replacement frequency and associated downtime. Hi-Tech Seals was also able to cut lead time by more than half compared to the previous supplier. Together, the extended diaphragm life and shorter lead time reduced slurry pump maintenance, downtime, and operating costs.","protected":false},"excerpt":{"rendered":"<p>By Josh Kelly, Sales Engineer The diaphragm is a critical component of a diaphragm slurry pump, a type of positive displacement pump&hellip;<\/p>\n","protected":false},"author":2,"featured_media":6608,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18],"tags":[],"class_list":["post-6603","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-case-studies"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Custom Slurry Pump Diaphragms Case Study | Hi-Tech Seals<\/title>\n<meta name=\"description\" content=\"Hi-Tech Seals engineered HNBR diaphragms for an abrasive slurry pump in copper and cobalt leaching, extending service life from 25 to 60 days.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.hitechseals.com\/case-studies-hnbr-slurry-pump-diaphragms\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Custom Slurry Pump Diaphragms Case Study | Hi-Tech Seals\" \/>\n<meta property=\"og:description\" content=\"Hi-Tech Seals engineered HNBR diaphragms for an abrasive slurry pump in copper and cobalt leaching, extending service life from 25 to 60 days.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.hitechseals.com\/case-studies-hnbr-slurry-pump-diaphragms\/\" \/>\n<meta property=\"og:site_name\" content=\"Hi-Tech Seals\" \/>\n<meta property=\"article:published_time\" content=\"2026-05-01T17:01:40+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-02T00:08:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.hitechseals.com\/wp-content\/uploads\/2026\/05\/diaphragm-thumbnail.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1052\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Client Web3\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Client Web3\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.hitechseals.com\\\/case-studies-hnbr-slurry-pump-diaphragms\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.hitechseals.com\\\/case-studies-hnbr-slurry-pump-diaphragms\\\/\"},\"author\":{\"name\":\"Client Web3\",\"@id\":\"https:\\\/\\\/www.hitechseals.com\\\/#\\\/schema\\\/person\\\/fe6c1df0d7616ccdfb8d4bb3ab419abe\"},\"headline\":\"Extending Slurry Pump Service Life with Custom HNBR Rubber &#038; 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