{"id":4717,"date":"2024-07-15T12:27:33","date_gmt":"2024-07-15T12:27:33","guid":{"rendered":"https:\/\/sinovalveco.com\/product\/double-offset-butterfly-valve\/"},"modified":"2024-08-23T08:53:01","modified_gmt":"2024-08-23T08:53:01","slug":"double-offset-butterfly-valve","status":"publish","type":"product","link":"https:\/\/ntgdvalve.com\/fr\/double-offset-butterfly-valve\/","title":{"rendered":"Vanne papillon \u00e0 double excentration"},"content":{"rendered":"<p><span style=\"font-size: 14pt;\"><strong>Double offset butterfly\u00a0valves<\/strong> are commonly regarded as high-performance butterfly valves. They are among the most popular eccentric butterfly valves in the market, apart from triple-offset valves. Additionally, they have often considered the finest type of butterfly valves.<\/span><\/p>\n<p><a href=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer.jpg\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-post-2224 wp-image-2219 aligncenter entered lazyloading\" src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer.jpg\" sizes=\"(max-width: 695px) 100vw, 695px\" srcset=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer.jpg 2339w, https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer-768x543.jpg 768w, https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer-1536x1086.jpg 1536w, https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer-2048x1447.jpg 2048w\" alt=\"high performance butterfly manufacturer\" width=\"695\" height=\"491\" data-lazy-srcset=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer.jpg 2339w, https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer-768x543.jpg 768w, https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer-1536x1086.jpg 1536w, https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer-2048x1447.jpg 2048w\" data-lazy-sizes=\"(max-width: 695px) 100vw, 695px\" data-lazy-src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer.jpg\" data-ll-status=\"loading\" \/><noscript><img decoding=\"async\" class=\"wp-post-2224 wp-image-2219 aligncenter\" src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer.jpg\" alt=\"high performance butterfly manufacturer\" width=\"695\" height=\"491\" srcset=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer.jpg 2339w, https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer-768x543.jpg 768w, https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer-1536x1086.jpg 1536w, https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/12\/high-performance-butterfly-manufacturer-2048x1447.jpg 2048w\" sizes=\"(max-width: 695px) 100vw, 695px\"><\/noscript><\/a><\/p>\n<p style=\"text-align: center;\">DOUBLE OFFSET BUTTERFLY VALVE<\/p>\n<p><span style=\"font-size: 14pt;\">Industrial valves require a broader pressure and temperature range than traditional butterfly valves could achieve. This has led to the development of a high-performance butterfly valve. Double eccentric butterfly valves provide a simple, lightweight, compact and cost-effective structure with a low operating torque benefit.<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 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: #0a0a0a;color:#0a0a0a\" 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: #0a0a0a;color:#0a0a0a\" 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:\/\/ntgdvalve.com\/fr\/double-offset-butterfly-valve\/#What_is_Double_Offset_Butterfly_valve\" >What is Double Offset Butterfly valve?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ntgdvalve.com\/fr\/double-offset-butterfly-valve\/#Classification_By_Connection_Type\" >Classification By Connection Type<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ntgdvalve.com\/fr\/double-offset-butterfly-valve\/#Wafer_Type\" >Wafer Type:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/ntgdvalve.com\/fr\/double-offset-butterfly-valve\/#Lug_Type\" >Lug Type:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/ntgdvalve.com\/fr\/double-offset-butterfly-valve\/#Flanged_End_Type\" >Flanged End Type:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/ntgdvalve.com\/fr\/double-offset-butterfly-valve\/#Welded_End_Type\" >Welded End Type:<\/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:\/\/ntgdvalve.com\/fr\/double-offset-butterfly-valve\/#How_does_Double_Offset_Butterfly_Valve_Work\" >How does Double Offset Butterfly Valve Work?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/ntgdvalve.com\/fr\/double-offset-butterfly-valve\/#When_to_use_Double_offset_butterfly_valve\" >When to use Double offset butterfly valve?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/ntgdvalve.com\/fr\/double-offset-butterfly-valve\/#Difference_Between_Double_and_Triple_offset_butterfly_Valve\" >Difference Between Double and Triple offset butterfly Valve<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_is_Double_Offset_Butterfly_valve\"><\/span><span id=\"What_is_Double_Offset_Butterfly_valve\"><span style=\"font-size: 24pt; color: #0000ff;\"><strong>What is Double Offset Butterfly valve?<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-size: 14pt;\">High-Performance Butterfly Valves uses\u00a0a disk offset from the centre of its seat, due to which it is named as\u00a0Double Offset butterfly valve. In this setting, the disk is eccentric or offset from the seat of the valve. When the disk begins to rotate, it shifts away from the seat instead of around it. In fact, this design utilizes line pressure to help give it a proper\u00a0sealing. This functionality allows the\u00a0usage\u00a0of double\u00a0offset butterfly valves in high-pressure systems such as ethanol or HVAC. PTFE or plastic are used commonly as a\u00a0seat material in double offset valves, but metal seats are also provided\u00a0to meet fire-testing requirements such as API 607.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Classification_By_Connection_Type\"><\/span><span id=\"Classification_By_Connection_Type\"><span style=\"font-size: 24pt; color: #0000ff;\"><strong>Classification By Connection Type<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-size: 14pt;\">Based on the connection there are four main types of high performance or double offset butterfly valves.<\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt;\">Wafer type ends.<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Lug type ends.<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Both flanged ends.<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Butt-welded types end.<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Wafer_Type\"><\/span><span id=\"Wafer_Type\"><span style=\"font-size: 14pt;\"><strong>Wafer Type:<\/strong> <\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">The wafer type\u00a0of the double offset butterfly valves is constructed to provide a strong sealing, safeguard against bi-directional pressure differentials, and to prevent any backflow in devices that were built for unidirectional flow. This is done by the use of a tightly\u00a0fitted seal material, such as an O-ring, gasket, precisely machined, along with a smooth valve face on the downstream and upstream parts of the valve.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Lug_Type\"><\/span><span id=\"Lug_Type\"><span style=\"font-size: 14pt;\"><strong>Lug Type:<\/strong> <\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">In the lug body type of the butterfly valve configuration one end of the pipeline can be removed without impacting the other side of the valve. This can be achieved with threaded inserts, flanges, and two sets of lugs (bolts) that do not use nuts so each flange has its bolts. In a Lug type connection, you do not have to shut down the whole device to inspect, clean, repair, or replace the lug butterfly valve.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Flanged_End_Type\"><\/span><span id=\"Flanged_End_Type\"><span style=\"font-size: 14pt;\"><strong>Flanged End Type:<\/strong> <\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">The flanged end type butterfly valve uses a flange at both ends of the valve to be attached with pipe flanges. This type of end connection is used for the very large size of the butterfly valve.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Welded_End_Type\"><\/span><span id=\"Welded_End_Type\"><span style=\"font-size: 14pt;\"><strong>Welded End Type:<\/strong> <\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">The welded end type butterfly valve is used where the system is under very high pressure. These types are generally used for small size butterfly valves.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_does_Double_Offset_Butterfly_Valve_Work\"><\/span><span id=\"How_does_Double_Offset_Butterfly_Valve_Work\"><span style=\"font-size: 24pt; color: #0000ff;\"><strong>How does Double Offset Butterfly Valve Work?<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-size: 14pt;\">Double-offset butterfly valves have a two-offset\u00a0disk which can be used\u00a0up to 1,480 psi [10 MPa]. Compared to the single-offset design, the double-offset butterfly valve uses\u00a0a stem which is present behind the disk. In the high-performance butterfly valve, the second offset stem is pushed back to one side from the middle of the disk. This offset geometry allows the\u00a0disk to be rubbed\u00a0over the seat with just 1\u00b0 to 3\u00b0 of 90\u00b0 rotation.<\/span><\/p>\n<p><span style=\"font-size: 14pt;\">The action of the double offset butterfly valve refers to\u00a0the cone profile while\u00a0sealing the valve. The configuration of the disk and shaft offsets produces the cam action of the disk in the seat, minimizing the torque required\u00a0to operate\u00a0the valve.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"When_to_use_Double_offset_butterfly_valve\"><\/span><span id=\"When_to_use_Double_offset_butterfly_valve\"><span style=\"font-size: 24pt; color: #0000ff;\"><strong>When to use Double offset butterfly valve?<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-size: 14pt;\">The double-offset butterfly valve is designed to be used in applications requiring greater resistance to the pressure. The disk is placed in the center of the pipe bore and designed to improve the sealing capability and minimize valve wear.<\/span><\/p>\n<p><span style=\"font-size: 14pt;\">High-performance butterfly valves are suitable for application in water, wastewater, oil, steam and gasses in a cost-effective, compact build. Their corrosion-resistant, single-element thrust bearing and disk spacer eliminates body wear and helps maintain a positive centering of the disk in the valve bore.<\/span><\/p>\n<p><span style=\"font-size: 14pt;\">Double-offset\u00a0butterfly valves can be operated\u00a0manually using a handle, or with\u00a0gears or actuators.\u00a0These devices\u00a0rotate\u00a0the valve disk to the ideal location for effective\u00a0sealing\u00a0or complete opening of the valve. High-performance butterfly valves are used mostly in the water, chemical and petrochemical industries and can also be used in fuel handling &amp;\u00a0control and many other applications.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Difference_Between_Double_and_Triple_offset_butterfly_Valve\"><\/span><span id=\"Difference_Between_Double_and_Triple_offset_butterfly_Valve\"><span style=\"font-size: 24pt; color: #0000ff;\"><strong>Difference Between Double and Triple offset butterfly Valve<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><span style=\"font-size: 14pt;\">The double offset butterfly valve has two offsets at the center that produce cam action at the time of the application process.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-size: 14pt;\">Triple offset butterfly valves (TOV) have three different offset valves. Two offsets are located at the centre whereas the third is on the seat surface which creates the shape of the disk and seat form of the cone.<\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt;\">The double offset Butterfly valve can be used for an application of up to 325\u00b0C and can be used in pressure as high as 50 bars. While a Triple Offset Butterfly valves can be used for a demanding &amp; long-term application of up to 932\u00b0F (500\u00b0C) and the valve is designed to withstand a high pressure of up to 725 psi (50 bar).<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Double offset butterfly valve seat is made up of soft material while in triple offset butterfly valve seat is made of hard metal.<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">One of the key distinctions between the two butterfly valves is their appearance. In the double offset butterfly valve, the two offsets of this type of valve allow easy opening and retain their strong sealing strength.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-size: 14pt;\">NTGD Valve is a experienced <strong>double offset butterfly valve manufacturer<\/strong>, please feel free to send us mail if you have any inquiry.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u203b Double disque excentrique<br \/>\n\u203b Gamme de tailles : NPS 2 \u00e0 NPS 48<br \/>\n\u203b Gamme de classes : PN16\/25\/40\/150LB\/300LB<br \/>\n\u203b Conception STD.. : API609\/ MSS SP-68<br \/>\n\u203b Fabricant de vanne papillon \u00e0 double excentration<\/p>","protected":false},"featured_media":6538,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_eb_attr":"","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-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":"","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-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":"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":""},"mobile":{"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":""}}},"product_brand":[],"product_cat":[91],"product_tag":[],"class_list":["post-4717","product","type-product","status-publish","has-post-thumbnail","product_cat-butterfly-valve","desktop-align-left","tablet-align-left","mobile-align-left","first","instock","featured","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/product\/4717","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/comments?post=4717"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/media\/6538"}],"wp:attachment":[{"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/media?parent=4717"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/product_brand?post=4717"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/product_cat?post=4717"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/ntgdvalve.com\/fr\/wp-json\/wp\/v2\/product_tag?post=4717"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}