{"id":8680,"date":"2025-12-19T21:49:49","date_gmt":"2025-12-19T13:49:49","guid":{"rendered":"https:\/\/www.stvvalves.com\/?p=8680"},"modified":"2025-12-28T10:24:45","modified_gmt":"2025-12-28T02:24:45","slug":"how-butterfly-valve-sealing-works-effectively","status":"publish","type":"post","link":"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/","title":{"rendered":"How Butterfly Valve Sealing Works Effectively"},"content":{"rendered":"<section id=\"introduction\"><strong>How Butterfly Valve Sealing Works Effectively<\/strong>Butterfly valve sealing is a critical aspect of fluid control systems that directly impacts operational efficiency, safety, and maintenance costs. Understanding how these sealing mechanisms work helps engineers and maintenance professionals select the right valve for specific applications and ensure optimal performance. This comprehensive guide explores the fundamentals of butterfly valve sealing, different design approaches, and practical considerations for maintaining effective seals in industrial environments.<\/p>\n<\/section>\n<section id=\"basics\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Understanding_Butterfly_Valves_Basic_Principles\" >Understanding Butterfly Valves: Basic Principles<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#The_Fundamental_Sealing_Mechanism_of_Butterfly_Valves\" >The Fundamental Sealing Mechanism of Butterfly Valves<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Different_Types_of_Butterfly_Valve_Sealing_Designs\" >Different Types of Butterfly Valve Sealing Designs<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Soft_Seat_Sealing_Butterfly_Valve\" >Soft Seat Sealing Butterfly Valve<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Metal_Seat_Sealing_Butterfly_Valve\" >Metal Seat Sealing Butterfly Valve<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Eccentric_Sealing_Designs\" >Eccentric Sealing Designs<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Key_Components_of_Butterfly_Valve_Sealing_Systems\" >Key Components of Butterfly Valve Sealing Systems<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Valve_Disc\" >Valve Disc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Valve_Seat\" >Valve Seat<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Stem_Seals_Butterfly_Valve\" >Stem Seals Butterfly Valve<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Body_Design\" >Body Design<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Actuators_and_Control_Systems\" >Actuators and Control Systems<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Factors_Contributing_to_Effective_Butterfly_Valve_Sealing\" >Factors Contributing to Effective Butterfly Valve Sealing<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Butterfly_Valve_Material_Selection\" >Butterfly Valve Material Selection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Precision_Manufacturing\" >Precision Manufacturing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Proper_Installation\" >Proper Installation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Operating_Conditions\" >Operating Conditions<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Common_Challenges_with_Butterfly_Valve_Sealing_and_Solutions\" >Common Challenges with Butterfly Valve Sealing and Solutions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Common_Sealing_Challenges\" >Common Sealing Challenges<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Effective_Solutions\" >Effective Solutions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Case_Study_Solving_Sealing_Issues_in_High-Cycle_Applications\" >Case Study: Solving Sealing Issues in High-Cycle Applications<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Maintenance_Practices_for_Long-Term_Sealing_Effectiveness\" >Maintenance Practices for Long-Term Sealing Effectiveness<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Regular_Inspection_Protocols\" >Regular Inspection Protocols<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Preventive_Maintenance_Schedules\" >Preventive Maintenance Schedules<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Proper_Lubrication\" >Proper Lubrication<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Rebuilding_and_Replacement_Strategies\" >Rebuilding and Replacement Strategies<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Butterfly_Valve_Sealing_Compared_to_Other_Valve_Types\" >Butterfly Valve Sealing Compared to Other Valve Types<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#When_to_Choose_Butterfly_Valves_for_Optimal_Sealing\" >When to Choose Butterfly Valves for Optimal Sealing<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.stvvalves.com\/de\/how-butterfly-valve-sealing-works-effectively\/#Ensuring_Optimal_Butterfly_Valve_Sealing_Performance\" >Ensuring Optimal Butterfly Valve Sealing Performance<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Understanding_Butterfly_Valves_Basic_Principles\"><\/span>Understanding Butterfly Valves: Basic Principles<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div style=\"width: 1215px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/48877118-7272-4a4d-b302-0465d8aa4548\/7c0162ef-88b5-4cf7-9ba9-cc48ad7031d3\/02e527c6-4f01-4b3e-b9e2-6746d1ee126c.jpg\" alt=\"Butterfly valve cross-section showing the disc, seat, and sealing mechanism\" width=\"1205\" height=\"1024\" \/><p class=\"wp-caption-text\">Butterfly valve cross-section showing the disc, seat, and sealing mechanism<\/p><\/div>\n<div class=\"img-container\">\n<div class=\"image-embed\" contenteditable=\"false\" data-image=\"%7B%22src%22%3A%22https%3A%2F%2Fstorage.googleapis.com%2F48877118-7272-4a4d-b302-0465d8aa4548%2F7c0162ef-88b5-4cf7-9ba9-cc48ad7031d3%2F02e527c6-4f01-4b3e-b9e2-6746d1ee126c.jpg%22%2C%22title%22%3A%22Butterfly%20valve%20cross-section%20showing%20the%20disc%2C%20seat%2C%20and%20sealing%20mechanism%22%2C%22method%22%3A%22insert%22%2C%22date%22%3A1766151611030%7D\">\n<div class=\"_Media_1itgw_1 _ImageEmbed_1itgw_28\"><\/div>\n<\/div>\n<\/div>\n<p><a href=\"https:\/\/unionvalve.com\/blogs\/valve-knowledge\/understanding-your-options-soft-sealing-vs-hard-sealing-butterfly\" target=\"_blank\" rel=\"noopener\">Absperrklappen<\/a> belong to the quarter-turn valve family, featuring a disc-shaped closing element that rotates 90 degrees around its axis to control flow. Their popularity stems from their compact design, lightweight construction, and cost-effectiveness compared to other valve types like gate or globe valves. The valve&#8217;s primary components include the body, disc, stem, seat, and actuator.<\/p>\n<p>These valves are widely used across numerous industries including water treatment, chemical processing, power generation, oil and gas, and HVAC systems. Their versatility makes them suitable for applications ranging from simple on\/off control to more complex flow regulation scenarios. The effectiveness of a butterfly valve largely depends on its sealing mechanism, which determines its pressure handling capability, temperature resistance, and overall performance.<\/p>\n<\/section>\n<section id=\"sealing-mechanism\">\n<h2><span class=\"ez-toc-section\" id=\"The_Fundamental_Sealing_Mechanism_of_Butterfly_Valves\"><\/span>The Fundamental Sealing Mechanism of Butterfly Valves<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/48877118-7272-4a4d-b302-0465d8aa4548\/7c0162ef-88b5-4cf7-9ba9-cc48ad7031d3\/aefb8664-8432-4d23-ac89-7ffc3a54a6f8.jpg\" alt=\"Butterfly valve sealing process showing the disc rotation against the seat\" \/><\/p>\n<div class=\"img-container\">\n<div class=\"image-embed\" contenteditable=\"false\" data-image=\"%7B%22src%22%3A%22https%3A%2F%2Fstorage.googleapis.com%2F48877118-7272-4a4d-b302-0465d8aa4548%2F7c0162ef-88b5-4cf7-9ba9-cc48ad7031d3%2Faefb8664-8432-4d23-ac89-7ffc3a54a6f8.jpg%22%2C%22title%22%3A%22Butterfly%20valve%20sealing%20process%20showing%20the%20disc%20rotation%20against%20the%20seat%22%2C%22method%22%3A%22insert%22%2C%22date%22%3A1766151610930%7D\">\n<div class=\"_Media_1itgw_1 _ImageEmbed_1itgw_28\">\n<div class=\"_Buttons_1itgw_5\" contenteditable=\"false\" data-media=\"true\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>The sealing mechanism in butterfly valves operates on a simple yet effective principle. When the valve is closed, the disc presses against a resilient seat, creating a seal that prevents fluid from passing through. This contact between the disc edge and the seat is what provides the sealing effect. The effectiveness of this seal depends on several factors including the contact pressure, material compatibility, and geometric precision of the components.<\/p>\n<p><a href=\"https:\/\/fcval.com\/structure-and-sealing-of-butterfly-valve\/\" target=\"_blank\" rel=\"noopener\">Butterfly valve<\/a> sealing relies on either interference fit or pressure-assisted sealing. In interference fit designs, the disc is slightly larger than the inner diameter of the seat, creating compression when closed. In pressure-assisted designs, the system pressure helps push the disc against the seat, enhancing the seal as pressure increases. This dual approach ensures reliable sealing across various operating conditions.<\/p>\n<p>The geometry of the disc edge and its interaction with the seat is carefully engineered to optimize sealing performance. Modern butterfly valves employ various disc edge profiles, from simple flat edges to complex contoured designs that maximize sealing efficiency while minimizing wear on the seat material.<\/p>\n<\/section>\n<section id=\"sealing-types\">\n<h2><span class=\"ez-toc-section\" id=\"Different_Types_of_Butterfly_Valve_Sealing_Designs\"><\/span>Different Types of Butterfly Valve Sealing Designs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"two-columns\">\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Soft_Seat_Sealing_Butterfly_Valve\"><\/span>Soft Seat Sealing Butterfly Valve<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/48877118-7272-4a4d-b302-0465d8aa4548\/7c0162ef-88b5-4cf7-9ba9-cc48ad7031d3\/7572262f-af33-4129-bb62-9efd85ddba21.jpg\" alt=\"Soft seat butterfly valve sealing with elastomer material\" \/><\/p>\n<div class=\"img-container\">\n<div class=\"image-embed\" contenteditable=\"false\" data-image=\"%7B%22src%22%3A%22https%3A%2F%2Fstorage.googleapis.com%2F48877118-7272-4a4d-b302-0465d8aa4548%2F7c0162ef-88b5-4cf7-9ba9-cc48ad7031d3%2F7572262f-af33-4129-bb62-9efd85ddba21.jpg%22%2C%22title%22%3A%22Soft%20seat%20butterfly%20valve%20sealing%20with%20elastomer%20material%22%2C%22method%22%3A%22insert%22%2C%22date%22%3A1766151610830%7D\">\n<div class=\"_Media_1itgw_1 _ImageEmbed_1itgw_28\">\n<div class=\"_Buttons_1itgw_5\" contenteditable=\"false\" data-media=\"true\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><a href=\"https:\/\/www.stvvalves.com\/de\/wholesale\/butterfly-valve\/wafer-butterfly-valve\/\">Soft seat butterfly valves<\/a> utilize elastomeric or polymer materials to create a tight seal. The flexible nature of these materials allows them to conform to the disc edge, providing excellent sealing performance even at lower pressures. Common soft sealing materials include:<\/p>\n<ul class=\"custom-list\">\n<li>EPDM (Ethylene Propylene Diene Monomer) &#8211; Excellent for water applications, temperature range of -40\u00b0C to 120\u00b0C<\/li>\n<li>NBR (Nitrile Butadiene Rubber) &#8211; Ideal for oil-based media, temperature range of -30\u00b0C to 90\u00b0C<\/li>\n<li>PTFE (Polytetrafluoroethylene) &#8211; Superior chemical resistance, temperature range of -196\u00b0C to 200\u00b0C<\/li>\n<li>Viton (Fluoroelastomer) &#8211; High temperature resistance up to 250\u00b0C, excellent chemical compatibility<\/li>\n<\/ul>\n<p>Soft seat butterfly valves typically achieve bubble-tight shutoff (zero leakage) and are preferred in applications where absolute sealing is required. However, they have temperature limitations and may be susceptible to wear in highly abrasive media.<\/p>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Metal_Seat_Sealing_Butterfly_Valve\"><\/span>Metal Seat Sealing Butterfly Valve<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/48877118-7272-4a4d-b302-0465d8aa4548\/7c0162ef-88b5-4cf7-9ba9-cc48ad7031d3\/6f73d841-d4f2-437b-a4ae-3065de1b1c56.jpg\" alt=\"Metal seat butterfly valve sealing mechanism\" \/><\/p>\n<div class=\"img-container\">\n<div class=\"image-embed\" contenteditable=\"false\" data-image=\"%7B%22src%22%3A%22https%3A%2F%2Fstorage.googleapis.com%2F48877118-7272-4a4d-b302-0465d8aa4548%2F7c0162ef-88b5-4cf7-9ba9-cc48ad7031d3%2F6f73d841-d4f2-437b-a4ae-3065de1b1c56.jpg%22%2C%22title%22%3A%22Metal%20seat%20butterfly%20valve%20sealing%20mechanism%22%2C%22method%22%3A%22insert%22%2C%22date%22%3A1766151610730%7D\">\n<div class=\"_Media_1itgw_1 _ImageEmbed_1itgw_28\">\n<div class=\"_Buttons_1itgw_5\" contenteditable=\"false\" data-media=\"true\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><a href=\"https:\/\/www.stvvalves.com\/de\/products\/300lb-three-eccentric-butterfly-valve-10-inch-metal-seat-wcb\/\">Metal seated butterfly valves<\/a> employ metal-to-metal contact between the disc and seat to achieve sealing. These designs are preferred for high-temperature applications where soft seat materials would deteriorate. Common metal sealing configurations include:<\/p>\n<ul class=\"custom-list\">\n<li>Steel + Steel &#8211; High durability, suitable for abrasive applications<\/li>\n<li>Steel + Copper &#8211; Enhanced sealing through slight deformation of the softer copper<\/li>\n<li>Steel + Alloy Steel &#8211; Specialized for high-pressure, high-temperature environments<\/li>\n<li>Steel + Graphite &#8211; Combines metal durability with graphite&#8217;s self-lubricating properties<\/li>\n<\/ul>\n<p>Metal seated butterfly valves typically offer longer service life in harsh conditions but may not provide the same level of tight shutoff as soft seated designs. They excel in applications with temperatures exceeding 250\u00b0C or where abrasive media would quickly damage soft seats.<\/p>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"Eccentric_Sealing_Designs\"><\/span>Eccentric Sealing Designs<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"img-container\"><\/div>\n<p>Butterfly valves have evolved from simple concentric designs to more sophisticated eccentric configurations that enhance sealing performance:<\/p>\n<div class=\"table-container\">\n<table class=\"responsive-table responsive-table-striped\">\n<thead>\n<tr>\n<td data-row=\"head\">Design Type<\/td>\n<td data-row=\"head\">Sealing Mechanism<\/td>\n<td data-row=\"head\">Anwendungen<\/td>\n<td data-row=\"head\">Vorteile<\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-label=\"Design Type\">Concentric (Zero Offset)<\/td>\n<td data-label=\"Sealing Mechanism\">Disc centered in pipe, seat compressed when closed<\/td>\n<td data-label=\"Applications\">Low pressure, general purpose<\/td>\n<td data-label=\"Advantages\">Simple design, cost-effective<\/td>\n<\/tr>\n<tr>\n<td data-label=\"Design Type\">Single Eccentric (First Offset)<\/td>\n<td data-label=\"Sealing Mechanism\">Stem offset from disc centerline<\/td>\n<td data-label=\"Applications\">Medium pressure applications<\/td>\n<td data-label=\"Advantages\">Reduced seat wear, improved sealing<\/td>\n<\/tr>\n<tr>\n<td data-label=\"Design Type\">Double Eccentric (Second Offset)<\/td>\n<td data-label=\"Sealing Mechanism\">Stem offset from both disc and pipe centerlines<\/td>\n<td data-label=\"Applications\">Higher pressure, industrial processes<\/td>\n<td data-label=\"Advantages\">Minimized friction, extended seat life<\/td>\n<\/tr>\n<tr>\n<td data-label=\"Design Type\">Triple Eccentric (Third Offset)<\/td>\n<td data-label=\"Sealing Mechanism\">Conical sealing surface with three offsets<\/td>\n<td data-label=\"Applications\">High temperature, high pressure<\/td>\n<td data-label=\"Advantages\">Zero rubbing, metal-to-metal sealing<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>The evolution of eccentric designs has significantly improved butterfly valve sealing performance. Triple eccentric designs, in particular, have revolutionized the industry by enabling metal-to-metal sealing without the friction and wear associated with earlier designs. These valves achieve tight shutoff while maintaining excellent durability in extreme conditions.<\/p>\n<\/section>\n<section id=\"key-components\">\n<h2><span class=\"ez-toc-section\" id=\"Key_Components_of_Butterfly_Valve_Sealing_Systems\"><\/span>Key Components of Butterfly Valve Sealing Systems<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/48877118-7272-4a4d-b302-0465d8aa4548\/7c0162ef-88b5-4cf7-9ba9-cc48ad7031d3\/1f0776e4-8767-40f9-8094-692d763939b2.jpg\" alt=\"Exploded view of butterfly valve sealing components\" \/><\/p>\n<div class=\"img-container\">\n<div class=\"image-embed\" contenteditable=\"false\" data-image=\"%7B%22src%22%3A%22https%3A%2F%2Fstorage.googleapis.com%2F48877118-7272-4a4d-b302-0465d8aa4548%2F7c0162ef-88b5-4cf7-9ba9-cc48ad7031d3%2F1f0776e4-8767-40f9-8094-692d763939b2.jpg%22%2C%22title%22%3A%22Exploded%20view%20of%20butterfly%20valve%20sealing%20components%22%2C%22method%22%3A%22insert%22%2C%22date%22%3A1766151610630%7D\">\n<div class=\"_Media_1itgw_1 _ImageEmbed_1itgw_28\">\n<div class=\"_Buttons_1itgw_5\" contenteditable=\"false\" data-media=\"true\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>The effectiveness of butterfly valve sealing depends on several critical components working together:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Valve_Disc\"><\/span>Valve Disc<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The disc is the primary closing element that rotates to control flow. Its edge profile is crucial for sealing effectiveness. Modern discs feature precision-machined edges with specific profiles designed to optimize contact with the seat. Materials range from stainless steel and ductile iron to specialized alloys for corrosive environments.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Valve_Seat\"><\/span>Valve Seat<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The seat provides the sealing surface against which the disc closes. In soft seated designs, the seat is typically an elastomer or polymer ring that may be bonded, mechanically retained, or inserted into the valve body. Metal seated designs use precisely machined metal seats, sometimes with special coatings or hardening treatments to enhance durability.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Stem_Seals_Butterfly_Valve\"><\/span>Stem Seals Butterfly Valve<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"img-container\"><\/div>\n<p>While the disc-to-seat interface provides the primary seal, stem seals prevent leakage around the rotating stem. These typically include packing glands, O-rings, or specialized sealing systems. The stem sealing system is critical for preventing external leakage and maintaining environmental integrity.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Body_Design\"><\/span>Body Design<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The valve body houses all components and provides structural integrity. Its internal geometry affects flow characteristics and sealing performance. Modern bodies feature precision-machined seating surfaces and optimized flow paths to reduce turbulence and pressure drop.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Actuators_and_Control_Systems\"><\/span>Actuators and Control Systems<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>While not directly part of the sealing mechanism, actuators control the positioning of the disc and the force applied during closing. Proper actuator sizing ensures adequate torque to achieve effective sealing without damaging components. Control systems may include position indicators, limit switches, and feedback mechanisms to verify proper sealing.<\/p>\n<\/section>\n<section id=\"performance-factors\">\n<h2><span class=\"ez-toc-section\" id=\"Factors_Contributing_to_Effective_Butterfly_Valve_Sealing\"><\/span>Factors Contributing to Effective Butterfly Valve Sealing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"img-container\"><\/div>\n<h3><\/h3>\n<h3><span class=\"ez-toc-section\" id=\"Butterfly_Valve_Material_Selection\"><\/span>Butterfly Valve Material Selection<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Choosing appropriate materials for both the disc and seat is fundamental to sealing performance. Material selection must consider:<\/p>\n<ul class=\"custom-list\">\n<li>Chemical compatibility with the process media<\/li>\n<li>Temperature range of the application<\/li>\n<li>Pressure requirements<\/li>\n<li>Abrasion resistance for particulate-laden fluids<\/li>\n<li>Corrosion resistance for aggressive chemicals<\/li>\n<\/ul>\n<p>For example, EPDM provides excellent sealing in water applications but would quickly degrade in petroleum-based fluids where NBR would be more appropriate. Similarly, metal seats with specialized coatings may be necessary for high-temperature steam applications.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Precision_Manufacturing\"><\/span>Precision Manufacturing<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"img-container\">\n<div class=\"image-embed\" contenteditable=\"false\" data-image=\"%7B%22src%22%3A%22https%3A%2F%2Fstorage.googleapis.com%2F48877118-7272-4a4d-b302-0465d8aa4548%2F7c0162ef-88b5-4cf7-9ba9-cc48ad7031d3%2F738e19ae-a6c0-44c7-a28e-cf33fee8b999.jpg%22%2C%22title%22%3A%22Precision%20manufacturing%20of%20butterfly%20valve%20sealing%20components%22%2C%22method%22%3A%22text-to-image%22%2C%22date%22%3A1766151610531%7D\">\n<div class=\"_Media_1itgw_1 _ImageEmbed_1itgw_28\">\n<div class=\"_Buttons_1itgw_5\" contenteditable=\"false\" data-media=\"true\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>The geometric precision of sealing components directly impacts performance. Modern manufacturing techniques including CNC machining, precision casting, and advanced quality control ensure consistent dimensions and surface finishes. Even minor variations in roundness, flatness, or surface finish can compromise sealing effectiveness.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Proper_Installation\"><\/span>Proper Installation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Even the best-designed valve will fail to seal properly if incorrectly installed. Key installation considerations include:<\/p>\n<ul class=\"custom-list\">\n<li>Proper alignment with pipe flanges<\/li>\n<li>Correct bolt torquing sequence and values<\/li>\n<li>Appropriate gasket selection and installation<\/li>\n<li>Verification of disc movement and clearance<\/li>\n<li>Proper actuator adjustment and limit setting<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Operating_Conditions\"><\/span>Operating Conditions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Butterfly valve sealing performance is influenced by the actual operating conditions, which may differ from design specifications. Factors such as pressure spikes, temperature fluctuations, flow turbulence, and water hammer can all affect sealing integrity. Proper valve selection must account for both normal and extreme operating scenarios.<\/p>\n<\/section>\n<section id=\"challenges\">\n<h2><span class=\"ez-toc-section\" id=\"Common_Challenges_with_Butterfly_Valve_Sealing_and_Solutions\"><\/span>Common Challenges with Butterfly Valve Sealing and Solutions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"img-container\"><\/div>\n<div class=\"pros-cons\">\n<div class=\"pros\">\n<h3 class=\"pros-title\"><span class=\"ez-toc-section\" id=\"Common_Sealing_Challenges\"><\/span>Common Sealing Challenges<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Seat wear from frequent cycling<\/li>\n<li>Chemical attack degrading seat materials<\/li>\n<li>Temperature extremes causing material failure<\/li>\n<li>Particulate buildup preventing complete closure<\/li>\n<li>Waterhammer damaging sealing components<\/li>\n<li>Stem leakage from packing wear<\/li>\n<li>Disc-to-seat misalignment<\/li>\n<\/ul>\n<\/div>\n<div class=\"cons\">\n<h3 class=\"cons-title\"><span class=\"ez-toc-section\" id=\"Effective_Solutions\"><\/span>Effective Solutions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Selecting appropriate seat materials for the application<\/li>\n<li>Implementing proper valve sizing to prevent excessive velocity<\/li>\n<li>Using eccentric designs to reduce seat wear<\/li>\n<li>Installing strainers upstream to prevent particulate damage<\/li>\n<li>Implementing controlled actuation to prevent slamming<\/li>\n<li>Regular maintenance and inspection programs<\/li>\n<li>Proper torque application during closure<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"Case_Study_Solving_Sealing_Issues_in_High-Cycle_Applications\"><\/span>Case Study: Solving Sealing Issues in High-Cycle Applications<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A water treatment facility experienced frequent leakage with standard concentric butterfly valves used for daily backwash operations. The high cycling rate (over 1,000 cycles per year) caused premature wear of the EPDM seats, resulting in leakage and increased maintenance costs.<\/p>\n<p>The solution involved replacing the concentric valves with double eccentric designs featuring reinforced PTFE seats. The eccentric design minimized rubbing during operation, while the reinforced PTFE provided better wear resistance than the original EPDM. Additionally, the actuation system was modified to include slow-closing functionality to reduce dynamic stresses. These changes extended the maintenance interval from 6 months to 3 years, significantly reducing downtime and maintenance costs.<\/p>\n<\/section>\n<section id=\"maintenance\">\n<h2><span class=\"ez-toc-section\" id=\"Maintenance_Practices_for_Long-Term_Sealing_Effectiveness\"><\/span>Maintenance Practices for Long-Term Sealing Effectiveness<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"img-container\"><\/div>\n<p>Maintaining effective butterfly valve sealing requires a systematic approach to inspection, testing, and preventive maintenance. A comprehensive maintenance program should include:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Regular_Inspection_Protocols\"><\/span>Regular Inspection Protocols<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul class=\"list-numbers\">\n<li>Visual inspection of external components for signs of leakage or damage<\/li>\n<li>Operational testing to verify full closure and proper sealing<\/li>\n<li>Stem packing inspection and adjustment as needed<\/li>\n<li>Actuator function verification and lubrication<\/li>\n<li>Checking for unusual noise or vibration during operation<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Preventive_Maintenance_Schedules\"><\/span>Preventive Maintenance Schedules<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Effective maintenance scheduling should be based on both time intervals and cycle counts, depending on which occurs first. Critical valves in severe service may require more frequent attention than those in less demanding applications.<\/p>\n<div class=\"table-container\">\n<table class=\"responsive-table responsive-table-striped\">\n<thead>\n<tr>\n<td data-row=\"head\">Service Type<\/td>\n<td data-row=\"head\">Inspection Frequency<\/td>\n<td data-row=\"head\">Recommended Actions<\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-label=\"Service Type\">Normal Service<\/td>\n<td data-label=\"Inspection Frequency\">Annually or 5,000 cycles<\/td>\n<td data-label=\"Recommended Actions\">Visual inspection, operational testing, lubrication<\/td>\n<\/tr>\n<tr>\n<td data-label=\"Service Type\">Severe Service<\/td>\n<td data-label=\"Inspection Frequency\">Quarterly or 2,500 cycles<\/td>\n<td data-label=\"Recommended Actions\">Complete inspection, seat examination, stem seal verification<\/td>\n<\/tr>\n<tr>\n<td data-label=\"Service Type\">Critical Service<\/td>\n<td data-label=\"Inspection Frequency\">Monthly or 1,000 cycles<\/td>\n<td data-label=\"Recommended Actions\">Comprehensive testing, leak detection, actuator diagnostics<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"Proper_Lubrication\"><\/span>Proper Lubrication<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Lubrication is essential for components like stems, bearings, and actuators. However, care must be taken to use lubricants compatible with the process media and to avoid contaminating soft sealing materials with incompatible greases. Manufacturer recommendations should be followed regarding lubricant type and application frequency.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Rebuilding_and_Replacement_Strategies\"><\/span>Rebuilding and Replacement Strategies<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"img-container\">\n<div class=\"image-embed\" contenteditable=\"false\" data-image=\"%7B%22src%22%3A%22https%3A%2F%2Fstorage.googleapis.com%2F48877118-7272-4a4d-b302-0465d8aa4548%2F7c0162ef-88b5-4cf7-9ba9-cc48ad7031d3%2Fe02bbcff-f671-44e7-b710-6fc5d9af6b90.jpg%22%2C%22title%22%3A%22Butterfly%20valve%20seal%20replacement%20process%22%2C%22method%22%3A%22text-to-image%22%2C%22date%22%3A1766151610431%7D\">\n<div class=\"_Media_1itgw_1 _ImageEmbed_1itgw_28\">\n<div class=\"_Buttons_1itgw_5\" contenteditable=\"false\" data-media=\"true\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>Eventually, sealing components will require replacement. Having a planned approach to rebuilding valves can minimize downtime and ensure proper restoration of sealing performance. Key considerations include:<\/p>\n<ul class=\"custom-list\">\n<li>Maintaining an inventory of critical spare parts<\/li>\n<li>Documenting proper disassembly and reassembly procedures<\/li>\n<li>Using proper tools and fixtures to avoid damage during maintenance<\/li>\n<li>Implementing post-maintenance testing to verify proper sealing<\/li>\n<li>Tracking maintenance history to identify recurring issues<\/li>\n<\/ul>\n<\/section>\n<section id=\"comparison\">\n<h2><span class=\"ez-toc-section\" id=\"Butterfly_Valve_Sealing_Compared_to_Other_Valve_Types\"><\/span>Butterfly Valve Sealing Compared to Other Valve Types<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"img-container\"><\/div>\n<p>Understanding how butterfly valve sealing compares to other common valve types helps in making appropriate selection decisions for specific applications:<\/p>\n<div class=\"table-container\">\n<table class=\"responsive-table responsive-table-striped\">\n<thead>\n<tr>\n<td data-row=\"head\">Ventiltyp<\/td>\n<td data-row=\"head\">Sealing Mechanism<\/td>\n<td data-row=\"head\">Sealing Performance<\/td>\n<td data-row=\"head\">Best Applications<\/td>\n<td data-row=\"head\">Limitations<\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-label=\"Valve Type\">Absperrklappe<\/td>\n<td data-label=\"Sealing Mechanism\">Disc against seat<\/td>\n<td data-label=\"Sealing Performance\">Good to excellent, depending on design<\/td>\n<td data-label=\"Best Applications\">Large diameter, low pressure, space-constrained<\/td>\n<td data-label=\"Limitations\">Pressure limitations, disc always in flow path<\/td>\n<\/tr>\n<tr>\n<td data-label=\"Valve Type\">Kugelhahn<\/td>\n<td data-label=\"Sealing Mechanism\">Ball against seat rings<\/td>\n<td data-label=\"Sealing Performance\">Excellent, bubble-tight<\/td>\n<td data-label=\"Best Applications\">High pressure, tight shutoff requirements<\/td>\n<td data-label=\"Limitations\">Higher cost, larger envelope, cavity trapping<\/td>\n<\/tr>\n<tr>\n<td data-label=\"Valve Type\">Absperrschieber<\/td>\n<td data-label=\"Sealing Mechanism\">Gate against seat rings<\/td>\n<td data-label=\"Sealing Performance\">Good when new, deteriorates with wear<\/td>\n<td data-label=\"Best Applications\">Full flow requirements, infrequent operation<\/td>\n<td data-label=\"Limitations\">Slow operation, large actuator forces, seat wear<\/td>\n<\/tr>\n<tr>\n<td data-label=\"Valve Type\">Durchgangsventil<\/td>\n<td data-label=\"Sealing Mechanism\">Disc against seat ring<\/td>\n<td data-label=\"Sealing Performance\">Excellent, renewable seating<\/td>\n<td data-label=\"Best Applications\">Throttling, frequent operation<\/td>\n<td data-label=\"Limitations\">High pressure drop, larger size, higher cost<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"When_to_Choose_Butterfly_Valves_for_Optimal_Sealing\"><\/span>When to Choose Butterfly Valves for Optimal Sealing<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Butterfly valves offer superior sealing performance in applications where:<\/p>\n<ul class=\"custom-list\">\n<li>Space and weight constraints make other valve types impractical<\/li>\n<li>Large diameters are required (especially above 12 inches\/300mm)<\/li>\n<li>Quick operation is needed (quarter-turn vs. multi-turn)<\/li>\n<li>Cost considerations are important (generally less expensive than equivalent ball or gate valves)<\/li>\n<li>Moderate pressure and temperature conditions prevail<\/li>\n<\/ul>\n<p>Modern triple eccentric butterfly valves have expanded these traditional boundaries, now offering sealing performance comparable to ball valves in many high-pressure, high-temperature applications while maintaining the space and weight advantages inherent to the butterfly design.<\/p>\n<\/section>\n<section id=\"conclusion\">\n<h2><span class=\"ez-toc-section\" id=\"Ensuring_Optimal_Butterfly_Valve_Sealing_Performance\"><\/span>Ensuring Optimal Butterfly Valve Sealing Performance<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Effective butterfly valve sealing requires a holistic approach that begins with proper valve selection and continues through installation, operation, and maintenance. By understanding the fundamental principles of butterfly valve sealing and the factors that influence performance, engineers and maintenance professionals can ensure reliable operation and extended service life.<\/p>\n<p>Key takeaways for optimizing butterfly valve sealing include:<\/p>\n<ul class=\"custom-list\">\n<li>Match the valve design (concentric, eccentric) to the application requirements<\/li>\n<li>Select appropriate sealing materials based on media, temperature, and pressure<\/li>\n<li>Ensure proper installation with correct alignment and torque<\/li>\n<li>Implement regular inspection and maintenance programs<\/li>\n<li>Consider the entire system when diagnosing sealing issues<\/li>\n<li>Stay informed about advances in valve technology and materials<\/li>\n<\/ul>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>How Butterfly Valve Sealing Works EffectivelyButterfly valve sealing is a critical aspect of fluid control systems that directly impacts operational efficiency, safety, and maintenance costs. Understanding how these sealing mechanisms work helps engineers and maintenance professionals select the right valve for specific applications and ensure optimal performance. This comprehensive guide explores the fundamentals of butterfly [&hellip;]<\/p>\n","protected":false},"author":290641,"featured_media":7319,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[3853,3855,3854],"class_list":["post-8680","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news","tag-different-types-of-butterfly-valve-sealing","tag-metal-seat-butterfly-valve","tag-soft-seat-butterfly-valve"],"_links":{"self":[{"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/posts\/8680","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/users\/290641"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/comments?post=8680"}],"version-history":[{"count":2,"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/posts\/8680\/revisions"}],"predecessor-version":[{"id":8686,"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/posts\/8680\/revisions\/8686"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/media\/7319"}],"wp:attachment":[{"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/media?parent=8680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/categories?post=8680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/tags?post=8680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}