{"id":1192,"date":"2025-04-28T14:11:48","date_gmt":"2025-04-28T06:11:48","guid":{"rendered":"https:\/\/hengoseal.com\/?p=1192"},"modified":"2025-04-28T14:17:57","modified_gmt":"2025-04-28T06:17:57","slug":"rotary-shaft-seal-material-comparison-fkm-nbr-ptfe","status":"publish","type":"post","link":"https:\/\/hengoseal.com\/uk\/rotary-shaft-seal-material-comparison-fkm-nbr-ptfe\/","title":{"rendered":"\u041f\u043e\u0440\u0456\u0432\u043d\u044f\u043d\u043d\u044f \u043c\u0430\u0442\u0435\u0440\u0456\u0430\u043b\u0456\u0432 \u0443\u0449\u0456\u043b\u044c\u043d\u0435\u043d\u043d\u044f \u0432\u0430\u043b\u0430: FKM, NBR \u0442\u0430 PTFE \u2013 \u044f\u043a\u0438\u0439 \u0437 \u043d\u0438\u0445 \u043e\u0431\u0440\u0430\u0442\u0438?"},"content":{"rendered":"<p>Choosing the right rotary shaft seal material is crucial for achieving optimal performance and long service life. Are you wondering whether FKM, NBR, or PTFE is the best fit for your application?<\/p>\n<p><strong>This guide compares FKM, NBR, and PTFE rotary shaft seals, focusing on their chemical resistance, temperature tolerance, mechanical strength, and cost-effectiveness.<\/strong><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/hengoseal.com\/wp-content\/uploads\/2025\/04\/J-oil-seal.jpg\" alt=\"placeholder_image\" \/><\/p>\n<p>Selecting the right material ensures maximum protection against leaks, abrasion, and harsh operating conditions. Let\u2019s explore the differences to help you make a smarter choice.<\/p>\n<h2>What are the key differences between FKM, NBR, and PTFE shaft seals?<\/h2>\n<p>FKM, NBR, and PTFE differ significantly in chemical compatibility, temperature limits, mechanical properties, and cost, each serving distinct industrial needs.<\/p>\n<p><strong>FKM shaft seals provide excellent heat and chemical resistance, NBR seals are cost-effective for oil-based environments, while PTFE seals deliver unmatched chemical and thermal durability.<\/strong><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/hengoseal.com\/wp-content\/uploads\/2025\/04\/OK-Hydraulic-Piston-Seal.jpg\" alt=\"placeholder_image\" \/><\/p>\n<p>For industries handling chemicals, selecting <a href=\"https:\/\/hengoseal.com\/uk\/ptfe-seals-extreme-chemical-applications\/\" target=\"_blank\">PTFE shaft seals<\/a> offers superior reliability compared to traditional rubber-based seals.<\/p>\n<h2>How does temperature resistance compare among FKM, NBR, and PTFE?<\/h2>\n<p>Temperature extremes can degrade seals and cause failures. Each material responds differently to heat and cold:<\/p>\n<ul>\n<li><strong>NBR<\/strong>: Suitable from -40\u00b0C to +120\u00b0C<\/li>\n<li><strong>FKM<\/strong>: Functions effectively between -20\u00b0C to +205\u00b0C<\/li>\n<li><strong>PTFE<\/strong>: Withstands -70\u00b0C to +260\u00b0C<\/li>\n<\/ul>\n<p><strong>PTFE is the clear winner for both high-heat and cryogenic environments.<\/strong><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/hengoseal.com\/wp-content\/uploads\/2025\/04\/ODU-Hydraulic-Seals.jpg\" alt=\"placeholder_image\" \/><\/p>\n<p>If your application demands high thermal endurance, consider <a href=\"https:\/\/hengoseal.com\/uk\/high-temperature-sealing-guide\/\" target=\"_blank\">high-temperature sealing solutions<\/a> for best results.<\/p>\n<h2>Which material provides better chemical resistance?<\/h2>\n<p>Exposure to harsh chemicals is a major cause of seal failure. Here's how the materials stack up:<\/p>\n<ul>\n<li><strong>NBR<\/strong>: Good for petroleum oils, but weak against strong acids and solvents<\/li>\n<li><strong>FKM<\/strong>: Resistant to a wide range of aggressive chemicals and solvents<\/li>\n<li><strong>PTFE<\/strong>: Excellent universal chemical resistance<\/li>\n<\/ul>\n<p><strong>PTFE remains stable in environments where both NBR and FKM degrade.<\/strong><\/p>\n<p>When handling aggressive chemicals, <a href=\"https:\/\/hengoseal.com\/uk\/fluorocarbon-vs-fkm-seals\/\" target=\"_blank\">fluorocarbon and PTFE seals<\/a> should be your primary choice.<\/p>\n<h2>How do mechanical properties differ between FKM, NBR, and PTFE?<\/h2>\n<p>Durability and wear resistance are key to sealing success:<\/p>\n<ul>\n<li><strong>NBR<\/strong>: High flexibility and abrasion resistance<\/li>\n<li><strong>FKM<\/strong>: Excellent strength, low compression set, and moderate flexibility<\/li>\n<li><strong>PTFE<\/strong>: Low friction, outstanding wear resistance, but lower flexibility<\/li>\n<\/ul>\n<p><strong>For high-speed, low-friction applications, PTFE excels, while FKM balances flexibility and strength.<\/strong><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/hengoseal.com\/wp-content\/uploads\/2025\/04\/V-Compact-Seal-.png\" alt=\"placeholder_image\" \/><\/p>\n<p>If you need seals for dynamic equipment, <a href=\"https:\/\/hengoseal.com\/uk\/reliable-radial-shaft-seals\/\" target=\"_blank\">reliable radial shaft seals<\/a> with PTFE material are ideal.<\/p>\n<h2>What are the cost implications of choosing FKM, NBR, or PTFE?<\/h2>\n<p>Price plays a significant role in material selection:<\/p>\n<ul>\n<li><strong>NBR<\/strong>: Most affordable option<\/li>\n<li><strong>FKM<\/strong>: Moderately priced, with better chemical and thermal performance<\/li>\n<li><strong>PTFE<\/strong>: Highest upfront cost, but longer service life<\/li>\n<\/ul>\n<p><strong>While NBR saves on initial costs, PTFE offers the best total cost of ownership over time.<\/strong><\/p>\n<p>For industries aiming for fewer maintenance cycles, investing in <a href=\"https:\/\/hengoseal.com\/uk\/custom-solutions\/\" target=\"_blank\">custom PTFE seals<\/a> makes long-term financial sense.<\/p>\n<h2>\u0412\u0438\u0441\u043d\u043e\u0432\u043e\u043a<\/h2>\n<p>Choosing between FKM, NBR, and PTFE shaft seals depends on your specific operating conditions, budget, and performance expectations. PTFE stands out for extreme chemical and thermal environments, while FKM balances cost and durability, and NBR is best for general oil-resistant applications.<\/p>\n<h2>Need expert help selecting the best shaft seal?<\/h2>\n<p>Contact us today to find the most cost-effective and durable sealing solution for your equipment!<\/p>\n<p>\u0415\u043b\u0435\u043a\u0442\u0440\u043e\u043d\u043d\u0430 \u0430\u0434\u0440\u0435\u0441\u0430: info@hengoseal.com<br \/>\nWhatsApp: +86 17622979498<\/p>\n<h2>Related topic<\/h2>\n<ul>\n<li><a href=\"https:\/\/hengoseal.com\/uk\/fkm-vs-nbr-oil-seal\/\" target=\"_blank\">FKM vs NBR Oil Seal: Which One Should You Choose?<\/a><\/li>\n<li><a href=\"https:\/\/hengoseal.com\/uk\/ptfe-seals-extreme-chemical-applications\/\" target=\"_blank\">\u0427\u043e\u043c\u0443 \u0432\u0430\u0440\u0442\u043e \u0432\u0438\u0431\u0440\u0430\u0442\u0438 \u0443\u0449\u0456\u043b\u044c\u043d\u0435\u043d\u043d\u044f \u0437 PTFE \u0434\u043b\u044f \u0435\u043a\u0441\u0442\u0440\u0435\u043c\u0430\u043b\u044c\u043d\u0438\u0445 \u0445\u0456\u043c\u0456\u0447\u043d\u0438\u0445 \u0437\u0430\u0441\u0442\u043e\u0441\u0443\u0432\u0430\u043d\u044c (\u041f\u043e\u0441\u0456\u0431\u043d\u0438\u043a 2025)<\/a><\/li>\n<li><a href=\"https:\/\/hengoseal.com\/uk\/oil-seal-vs-o-ring\/\" target=\"_blank\">Oil Seal vs O-Ring: 5 Key Comparisons (Essential)<\/a><\/li>\n<li><a href=\"https:\/\/hengoseal.com\/uk\/high-temperature-sealing-guide\/\" target=\"_blank\">High-Temperature Sealing: How to Prevent Failures in Extreme Conditions?<\/a><\/li>\n<\/ul>\n<style>\n.faq-question {\ncursor: pointer;\nfont-weight: bold;\npadding: 10px;\nbackground-color: #f1f1f1;\nborder: 1px solid #ddd;\nmargin-bottom: 5px;\ncolor: #0073aa;\n}\n.faq-answer {\ndisplay: none;\npadding: 10px;\nborder-left: 3px solid #0073aa;\nbackground-color: #f9f9f9;\nmargin-bottom: 10px;\n}\n<\/style>\n<p><script>\ndocument.addEventListener('DOMContentLoaded', function() {\nconst questions = document.querySelectorAll('.faq-question');\nquestions.forEach(question => {\nquestion.addEventListener('click', function() {\nconst answer = this.nextElementSibling;\nanswer.style.display = answer.style.display === 'block' ? 'none' : 'block';\n});\n});\n});\n<\/script><br \/>\n<!-- JSON-LD FAQ Schema --><br \/>\n<script type=\"application\/ld+json\">\n{\n\"@context\": \"https:\/\/schema.org\",\n\"@type\": \"FAQPage\",\n\"mainEntity\": [\n{\n\"@type\": \"Question\",\n\"name\": \"Is PTFE always better than FKM for shaft seals?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"PTFE offers better chemical and thermal resistance, but FKM provides better flexibility and is cost-effective for moderate conditions.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Can NBR seals be used with fuel systems?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Yes, NBR seals are excellent for petroleum-based oils and fuels but not for aggressive chemicals.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"How does PTFE perform under dry running conditions?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"PTFE has excellent dry-running capabilities, minimizing friction and heat buildup.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Which material has the best overall lifespan?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"PTFE generally provides the longest service life, especially under harsh conditions.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Are FKM seals compatible with automotive applications?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Absolutely. FKM seals are widely used in engines, transmissions, and fuel systems due to their heat and chemical resistance.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"What factors increase the cost of PTFE shaft seals?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Specialized manufacturing processes and premium material costs contribute to PTFE's higher price.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Can I replace an NBR shaft seal with a PTFE seal without modification?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"In many cases, yes, but always verify shaft and housing tolerances to ensure proper fit.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"How do I maintain rotary shaft seals for maximum performance?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Regular inspection, correct lubrication, and selecting the appropriate material for your conditions are key to maximizing seal life.\"\n}\n}\n]\n}\n<\/script><\/p>\n<h2>\u041b\u044e\u0434\u0438 \u0442\u0430\u043a\u043e\u0436 \u0437\u0430\u043f\u0438\u0442\u0443\u044e\u0442\u044c<\/h2>\n<div class=\"faq-container\">\n<div class=\"faq-question\">1. Is PTFE always better than FKM for shaft seals?<\/div>\n<div class=\"faq-answer\">PTFE offers better chemical and thermal resistance, but FKM provides better flexibility and is cost-effective for moderate conditions.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">2. Can NBR seals be used with fuel systems?<\/div>\n<div class=\"faq-answer\">Yes, NBR seals are excellent for petroleum-based oils and fuels but not for aggressive chemicals.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">3. How does PTFE perform under dry running conditions?<\/div>\n<div class=\"faq-answer\">PTFE has excellent dry-running capabilities, minimizing friction and heat buildup.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">4. Which material has the best overall lifespan?<\/div>\n<div class=\"faq-answer\">PTFE generally provides the longest service life, especially under harsh conditions.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">5. Are FKM seals compatible with automotive applications?<\/div>\n<div class=\"faq-answer\">Absolutely. FKM seals are widely used in engines, transmissions, and fuel systems due to their heat and chemical resistance.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">6. What factors increase the cost of PTFE shaft seals?<\/div>\n<div class=\"faq-answer\">Specialized manufacturing processes and premium material costs contribute to PTFE's higher price.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">7. Can I replace an NBR shaft seal with a PTFE seal without modification?<\/div>\n<div class=\"faq-answer\">In many cases, yes, but always verify shaft and housing tolerances to ensure proper fit.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">8. How do I maintain rotary shaft seals for maximum performance?<\/div>\n<div class=\"faq-answer\">Regular inspection, correct lubrication, and selecting the appropriate material for your conditions are key to maximizing seal life.<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Choosing the right rotary shaft seal material is crucial for achieving optimal performance and long service life. Are you wondering [&hellip;]<\/p>","protected":false},"author":1,"featured_media":1202,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[52],"tags":[],"class_list":["post-1192","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-radial-shaft-seals"],"_links":{"self":[{"href":"https:\/\/hengoseal.com\/uk\/wp-json\/wp\/v2\/posts\/1192","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hengoseal.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hengoseal.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hengoseal.com\/uk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hengoseal.com\/uk\/wp-json\/wp\/v2\/comments?post=1192"}],"version-history":[{"count":0,"href":"https:\/\/hengoseal.com\/uk\/wp-json\/wp\/v2\/posts\/1192\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hengoseal.com\/uk\/wp-json\/wp\/v2\/media\/1202"}],"wp:attachment":[{"href":"https:\/\/hengoseal.com\/uk\/wp-json\/wp\/v2\/media?parent=1192"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hengoseal.com\/uk\/wp-json\/wp\/v2\/categories?post=1192"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hengoseal.com\/uk\/wp-json\/wp\/v2\/tags?post=1192"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}