{"id":16962,"date":"2022-06-25T11:28:00","date_gmt":"2022-06-25T11:28:00","guid":{"rendered":"https:\/\/zecovalve.com\/?p=16962"},"modified":"2022-09-10T23:58:32","modified_gmt":"2022-09-10T23:58:32","slug":"how-to-choose-concentric-butterfly-valve-double-offset-butterfly-valve-and-triple-offset-butterfly-valve","status":"publish","type":"post","link":"https:\/\/zecovalve.com\/fr\/how-to-choose-concentric-butterfly-valve-double-offset-butterfly-valve-and-triple-offset-butterfly-valve.html","title":{"rendered":"Comment choisir une vanne papillon concentrique, une vanne papillon \u00e0 double excentration et une vanne papillon \u00e0 triple excentration"},"content":{"rendered":"<p>Il existe quatre types de vannes papillon, la vanne papillon concentrique, la vanne papillon simple excentrique, la vanne papillon double excentration et la vanne papillon triple excentration.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-choose-these-four\">Comment choisir ces quatre-l\u00e0 ? <\/h2>\n\n\n\n<p>La vanne papillon concentrique, la vanne papillon simple excentrique, la vanne papillon double excentration et la vanne papillon triple excentration refl\u00e8tent le fait que le processus d&#039;ouverture et de fermeture permet de plus en plus d&#039;\u00e9conomiser du travail et que l&#039;usure de la surface d&#039;\u00e9tanch\u00e9it\u00e9 est de moins en moins. En r\u00e9glant la position de l&#039;arbre rotatif de la plaque de la vanne papillon, l&#039;\u00e9tat d&#039;\u00e9tanch\u00e9it\u00e9 et d&#039;ouverture de la vanne papillon peut \u00eatre modifi\u00e9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vanne papillon concentrique<\/h3>\n\n\n\n<p>A<strong>&nbsp;vanne papillon concentrique&nbsp;<\/strong>se caract\u00e9rise par la m\u00eame position de l&#039;axe de la tige, du centre du papillon et du centre du corps de vanne. D&#039;une mani\u00e8re g\u00e9n\u00e9rale, le<strong>&nbsp;vanne papillon concentrique<\/strong>&nbsp;est utilis\u00e9 autant que possible si une vanne papillon concentrique peut en principe \u00eatre utilis\u00e9e. La vanne papillon concentrique est un produit conventionnel en raison de sa faible exigence d&#039;\u00e9tanch\u00e9it\u00e9 tant dans sa structure que dans son fonctionnement. Afin de surmonter l&#039;extrusion, les rayures et d&#039;assurer les performances d&#039;\u00e9tanch\u00e9it\u00e9, les si\u00e8ges de vannes papillon concentriques sont essentiellement constitu\u00e9s de mat\u00e9riaux \u00e9lastiques tels que le caoutchouc ou le polyt\u00e9trafluoro\u00e9thyl\u00e8ne, qui sont des vannes papillon \u00e0 \u00e9tanch\u00e9it\u00e9 souple.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vanne papillon double excentrique<\/h3>\n\n\n\n<p>La vanne papillon double excentrique est la plus utilis\u00e9e. La structure se caract\u00e9rise par le fait que l&#039;axe de la tige s&#039;\u00e9carte \u00e0 la fois du centre de la plaque papillon et du centre du corps de vanne. Il s&#039;\u00e9carte de deux positions centrales et est appel\u00e9\u00a0<strong>vanne papillon double excentrique<\/strong>. De nombreuses vannes papillon \u00e0 double excentrage sont des joints lin\u00e9aires. Une friction se produit entre le disque et le si\u00e8ge de soupape lorsque la surface d&#039;\u00e9tanch\u00e9it\u00e9 est ferm\u00e9e. L&#039;effet d&#039;\u00e9tanch\u00e9it\u00e9 est tr\u00e8s bon. Il pr\u00e9sente les caract\u00e9ristiques d\u2019une petite surface et d\u2019une forte pression. Une fois la vanne ouverte, la plaque papillon peut se d\u00e9tacher rapidement du si\u00e8ge de vanne, \u00e9liminant consid\u00e9rablement la surextrusion et les rayures inutiles entre la plaque papillon et le si\u00e8ge de vanne, r\u00e9duisant ainsi la r\u00e9sistance \u00e0 l&#039;ouverture, r\u00e9duisant l&#039;usure et am\u00e9liorant la dur\u00e9e de vie. du si\u00e8ge de soupape.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vanne papillon triple excentrique<\/h3>\n\n\n\n<p>La vanne papillon triple excentrique a r\u00e9alis\u00e9 la troisi\u00e8me excentricit\u00e9 sur la base de la vanne papillon double excentrique. La forme de la paire d&#039;\u00e9tanch\u00e9it\u00e9 n&#039;est pas un c\u00f4ne positif, mais un c\u00f4ne oblique. La plupart d&#039;entre eux sont des forces \u00e0 courte distance et des joints de surface. L&#039;arbre de tige d&#039;une vanne papillon triple excentrique est une structure d&#039;axe \u00e0 trois sections. Les segments \u00e0 deux essieux de la tige d&#039;essieu \u00e0 trois sections sont concentriques et la ligne centrale de l&#039;axe du segment central s&#039;\u00e9carte de l&#039;axe des deux extr\u00e9mit\u00e9s. La plaque papillon est install\u00e9e sur le segment d&#039;essieu central. Une telle structure excentrique rend la plaque papillon double excentrique en position compl\u00e8tement ouverte et simple excentrique en position ferm\u00e9e lorsque la plaque papillon tourne. En raison de l&#039;axe excentrique, lors de la fermeture, la plaque papillon se d\u00e9place sur une certaine distance dans le c\u00f4ne d&#039;\u00e9tanch\u00e9it\u00e9 du si\u00e8ge, et la surface d&#039;\u00e9tanch\u00e9it\u00e9 de la plaque papillon et du si\u00e8ge co\u00efncide pour obtenir des performances d&#039;\u00e9tanch\u00e9it\u00e9 fiables. Cela compense la contradiction selon laquelle le joint dur est m\u00e9diocre en termes d&#039;\u00e9tanch\u00e9it\u00e9 et le joint souple est bon en termes d&#039;\u00e9tanch\u00e9it\u00e9 mais ne r\u00e9siste pas aux hautes temp\u00e9ratures.<\/p>\n\n\n\n<p>Quand utiliser une vanne papillon concentrique et quand choisir la vanne papillon double excentrique ou la vanne papillon triple excentrique, cela d\u00e9pend principalement des habitudes d&#039;utilisation et du budget. S&#039;il ne s&#039;agit pas de conditions de travail extr\u00eames, la vanne papillon concentrique est g\u00e9n\u00e9ralement choisie, tandis que la vanne papillon concentrique est choisie dans la mesure du possible. Parce que la vanne papillon concentrique est de structure simple et de prix relativement \u00e9conomique.<\/p>\n\n\n\n<p><br>Zeco Valve Group Co., Ltd. vous propose diverses vannes papillon. Bienvenue pour les acheter!<\/p>\n\n\n\n<!-- Andy:h-related-tags -->\n<h2 id=\"h-related-tags\">Balises associ\u00e9es :<\/h2>\n<!-- \/Andy:h-related-tags -->\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/\">Soupape ZECO<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/introduction-of-epdm-nbr-butterfly-valve-seat-industrial-valve-information-news-zeco-valve.html\/\">Robinet \u00e0 papillon NBR<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/difference-between-gate-valve-and-butterfly-valve.html\/\">Diff\u00e9rence entre la vanne \u00e0 vanne et la vanne papillon<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/advantages-and-disadvantages-of-globe-valves.html\/\">Qu'est-ce qu'un robinet \u00e0 soupape ?<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/produit\/manual-gate-valve\/\">Fabricant de robinets-vannes \u00e0 commande manuelle<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/tag\/shanghai-pressure-reducing-valve-factory\/\">Usine de soupapes de r\u00e9duction de pression de Shanghai<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/the-difference-between-globe-valve-and-ball-valve.html\/\">Robinet \u00e0 soupape et robinet \u00e0 bille<\/a>\n\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Il existe quatre types de vannes papillon, la vanne papillon concentrique, la vanne papillon simple excentrique, la vanne papillon double excentration et la vanne papillon triple excentration\u2026 <a title=\"Comment choisir une vanne papillon concentrique, une vanne papillon \u00e0 double excentration et une vanne papillon \u00e0 triple excentration\" class=\"read-more\" href=\"https:\/\/zecovalve.com\/fr\/how-to-choose-concentric-butterfly-valve-double-offset-butterfly-valve-and-triple-offset-butterfly-valve.html\" aria-label=\"Plus sur Comment choisir une vanne papillon concentrique, une vanne papillon \u00e0 double excentration et une vanne papillon \u00e0 triple excentration\">Lire plus<\/a><\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","kt_blocks_editor_width":"","footnotes":""},"categories":[2210],"tags":[1957,3657,3192,2519,2211,2184],"class_list":["post-16962","post","type-post","status-publish","format-standard","hentry","category-butterfly-valve","tag-butterfly-valve","tag-center-line-butterfly-valve","tag-china-epdm-butterfly-valve","tag-concentric-butterfly-valve","tag-double-offset-butterfly-valve","tag-triple-offset-butterfly-valve","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"featured_image_src_large":false,"author_info":{"display_name":"Jerry","author_link":"https:\/\/zecovalve.com\/fr\/author\/jerry"},"comment_info":0,"category_info":[{"term_id":2210,"name":"Butterfly Valve","slug":"butterfly-valve","term_group":0,"term_taxonomy_id":2210,"taxonomy":"category","description":"","parent":0,"count":49,"filter":"raw","cat_ID":2210,"category_count":49,"category_description":"","cat_name":"Butterfly Valve","category_nicename":"butterfly-valve","category_parent":0}],"tag_info":[{"term_id":1957,"name":"butterfly valve","slug":"butterfly-valve","term_group":0,"term_taxonomy_id":1957,"taxonomy":"post_tag","description":"","parent":0,"count":30,"filter":"raw"},{"term_id":3657,"name":"Center line Butterfly Valve","slug":"center-line-butterfly-valve","term_group":0,"term_taxonomy_id":3657,"taxonomy":"post_tag","description":"<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_e4c4a1-9b\"} \/-->\r\n\r\n<!-- wp:generateblocks\/button-container {\"uniqueId\":\"6d8495a3\",\"isDynamic\":true,\"blockVersion\":2} -->\r\n<!-- wp:generateblocks\/button {\"uniqueId\":\"3d442e11\",\"hasUrl\":true,\"target\":true,\"backgroundColor\":\"#0366d6\",\"textColor\":\"#ffffff\",\"backgroundColorHover\":\"#222222\",\"textColorHover\":\"#ffffff\",\"paddingTop\":\"15\",\"paddingRight\":\"20\",\"paddingBottom\":\"15\",\"paddingLeft\":\"20\"} -->\r\n<a class=\"gb-button gb-button-3d442e11 gb-button-text\" href=\"mailto:commercial@zecovalve.com\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>GET CENTERLINE BUTTERFLY VALVE PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA resilient seated butterfly valve with superior design features and materials of construction to provide repeatable tight shutoff in severe abrasive and corrosive environments for a variety of applications.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Standard of Centerline Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li>Flange Standard.:DIN2501, BS10-D, BS4504, ANSI B16.1, B16.42, JIS B2239<\/li>\r\n \t<li>Valve Tested: API598<\/li>\r\n \t<li>Face to Face: DIN3202-K1, EN558-1 20 SERIES, BS5155, MSS SP-67<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Material of Centerline Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:table -->\r\n<figure class=\"wp-block-table\">\r\n<table>\r\n<tbody>\r\n<tr>\r\n<td><strong>o<\/strong><\/td>\r\n<td><strong>Parts Name<\/strong><\/td>\r\n<td><strong>Material<\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>1<\/td>\r\n<td>Body<\/td>\r\n<td>C.I. \/ D.I. \/ C.S.\u00a0\/ S.S.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>2<\/td>\r\n<td>Disc<\/td>\r\n<td>A536 60-40-18 \/ CF8 \/ CF8M \/ Br \/ AI-Br<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>3<\/td>\r\n<td>Seat<\/td>\r\n<td>NBR \/ EPDM \/ VITON \/ PTFE<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>4<\/td>\r\n<td>Stem<\/td>\r\n<td>SS410 \/ SS304 \/ SS216<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>5<\/td>\r\n<td>Pin<\/td>\r\n<td>SS304 \/ SS316<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>6<\/td>\r\n<td>Bushing<\/td>\r\n<td>PTFE \/ Bronze<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>7<\/td>\r\n<td>O-Ring<\/td>\r\n<td>NBR \/ EPDM \/ VITON<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>8<\/td>\r\n<td>Key<\/td>\r\n<td>Carbon Steel \/ SUS304 \/ SUS316<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n<!-- \/wp:table -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Design Features of Centerline Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Corrosion Resistance<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nWith Centerline Butterfly Valves only two parts of the valve come in contact with the medium. This means that neither the body nor mechanical parts such as the shaft are exposed to the corrosive environment.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe only two parts in contact with the medium are the body lining and the disc. These are available in a selection of materials so that a suitable corrosion-resistant combination can be chosen for most any application.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Bi-directional Shutoff<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nCenterline Butterfly Valves are liquid and gas-tight in both flow directions. The disc presses with uniform compression into the elastic cartridge seat over the entire circumference of the valve.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Replaceable Seat<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe replaceable seat consists of a reinforced backup ring, on which the elastomer seat material is vulcanized. When mounting the valve between the pipe flanges this stable seat cannot be deformed or displaced. The cartridge design also prevents deformation when the valve is cycled, such as stretching and bulging of the elastomer in front of the moving disc.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe fixed connection between the elastomer and the backup ring allows the use of the valve in a full vacuum and high flow velocities. The slightly protruding sealing lip of the seat also serves as the flange seal.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-features-of-centerline-butterfly-valve\">Features of Centerline Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li>Suitable for both gaseous and liquid service<\/li>\r\n \t<li>Phenolic Backed Seat for superior sealing and long term use<\/li>\r\n \t<li>Single-piece stem design assures even torque distribution<\/li>\r\n \t<li>Positive shutoff bi-directionally<\/li>\r\n \t<li>Direct mount automation<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Applications of Centerline Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li>HVAC<\/li>\r\n \t<li>Chemical\/Petrochemical Processing<\/li>\r\n \t<li>Food and Beverage<\/li>\r\n \t<li>Power and Utilities<\/li>\r\n \t<li>Pulp and Paper<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->","parent":0,"count":12,"filter":"raw"},{"term_id":3192,"name":"China EPDM Butterfly Valve","slug":"china-epdm-butterfly-valve","term_group":0,"term_taxonomy_id":3192,"taxonomy":"post_tag","description":"<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_d933f8-47\"} \/-->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-what-is-epdm-butterfly-valve\">What is EPDM Butterfly Valve?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEPDM is the abbreviated name for Ethylene Propylene Diene Monomer. In general industry, one may see other abbreviations or trade names used in lieu of EPDM such as EPT, Nordel, ECD, or EPR. All of these are the same materials as EPDM. EPDM is a standard seat material offered in Bray resilient-seated butterfly valves.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:generateblocks\/button-container {\"uniqueId\":\"6d8495a3\",\"isDynamic\":true,\"blockVersion\":2} -->\r\n<!-- wp:generateblocks\/button {\"uniqueId\":\"3d442e11\",\"hasUrl\":true,\"target\":true,\"backgroundColor\":\"#0366d6\",\"textColor\":\"#ffffff\",\"backgroundColorHover\":\"#222222\",\"textColorHover\":\"#ffffff\",\"paddingTop\":\"15\",\"paddingRight\":\"20\",\"paddingBottom\":\"15\",\"paddingLeft\":\"20\"} -->\r\n<a class=\"gb-button gb-button-3d442e11 gb-button-text\" href=\"mailto:commercial@zecovalve.com\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>GET CHINA EPDM BUTTERFLY VALVE PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Specifications of EPDM Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:table {\"className\":\"is-style-stripes\"} -->\r\n<figure class=\"wp-block-table is-style-stripes\">\r\n<table>\r\n<tbody>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Design Standard<\/td>\r\n<td class=\"has-text-align-left\" data-align=\"left\">EN 593,\u00a0MSS SP67\u00a0\u00a0\u00a0API 609\u00a0\u00a0BS5155<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Inspection &amp;\u00a0Test<\/td>\r\n<td class=\"has-text-align-left\" data-align=\"left\">API 598\u00a0\u00a0ISO 5208\u00a0\u00a0EN 12266<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">End Standard<\/td>\r\n<td class=\"has-text-align-left\" data-align=\"left\">ANSI B16.1 CL. 125LB &amp;\u00a0B16.5 CL. 150LBAS 2129 Table D\u00a0&amp; E\u00a0\u00a0\u00a0BS 10 Table D\u00a0&amp; EDIN 2501 PN6, PN10 &amp;\u00a0PN16EN 1092 PN6, PN10 &amp;\u00a0PN16ISO 2531 PN6, PN10 &amp;\u00a0PN16ISO 7005 PN6, PN10 &amp;\u00a0PN16KS B\u00a01511 \/\u00a0JIS B\u00a02210 5K &amp;\u00a010KMSS SP44 CL. 150LB\u00a0\u00a0AWWAC207SABS 1123 Table 1000\/3 &amp;\u00a0Table 1600\/3<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Face to Face<\/td>\r\n<td class=\"has-text-align-left\" data-align=\"left\">ISO 5752,\u00a0EN 558,\u00a0MSS SP67, and API 609\u00a0\u00a0DIN3202<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Top Flange<\/td>\r\n<td class=\"has-text-align-left\" data-align=\"left\">ISO 5211<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n<!-- \/wp:table -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Types of China EPDM Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li><strong>Wafer Butterfly valves<\/strong>\r\n<ul>\r\n \t<li>Equipped with a tightly fitting seal, o ring, and a flat valve face, Wafer Butterfly valves have good control of flow, which assures unidirectional flow.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Flanged Butterfly valves<\/strong>\r\n<ul>\r\n \t<li>These Flanged Butterfly valves with flanges on both ends. The flange ends connect with the flanges on the pipeline by bolts.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Lug-Style Butterfly valves<\/strong>\r\n<ul>\r\n \t<li>A Lug-Style Butterfly valve has the function of reducing pressure rating.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Welded Butterfly valves<\/strong>\r\n<ul>\r\n \t<li>Butt Weld Butterfly valves and Socket Weld Butterfly valves are two commonly used Welded Butterfly valves. These kinds of valves are of the enclosed type, helping to both on-off and regulate service.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Parts of EPDM Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:table {\"className\":\"is-style-stripes\"} -->\r\n<figure class=\"wp-block-table is-style-stripes\">\r\n<table>\r\n<tbody>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Parts<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Material<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Body<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Cast iron, Ductile iron, WCB<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Seat<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">EPDM, NBR, VITON, PTFE<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Disc<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Nickel ductile iron, AI bronze, Stainless Steel<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Stem<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Stainless Steel, Monel<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Bushing<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">PTFE<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">\"O\" ring<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">PTFE<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Pin<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Stainless Steel<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Key<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Stainless Steel<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n<!-- \/wp:table -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Advantages of EPDM Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nButterfly valves are similar to ball valves but have more advantages. They are open and close very quickly when actuated pneumatically. The disc is lighter than a ball, and the valves require less structural support than a ball valve of comparable diameter. Butterfly valves are very precise, which makes them advantageous in industrial applications. They are quite reliable and require very little maintenance.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:list {\"ordered\":true} -->\r\n<ol>\r\n \t<li>Turning on\/off easily and rapidly with less force. Having less fluid resistance and can be operated frequently.<\/li>\r\n \t<li>Simple structure, small size, and short face-to-face dimension, which are suitable for large-diameter valves.<\/li>\r\n \t<li>It can be used for transmitting mud, fewer liquids are stored at the apertures of the pipe.<\/li>\r\n \t<li>Long service life. Standing the test of tens of thousands of opening\/closing operations.<\/li>\r\n \t<li>Butterfly valves have excellent regulation performance.<\/li>\r\n \t<li>Small torque. The pressure on discs at the two sides of the spindle is almost equal, causing contrary torque. Thereby, the valves can be opened with less force.<\/li>\r\n \t<li>A sealing face is generally made of rubber or plastic. So the butterfly valves can be with good sealing under low pressure.<\/li>\r\n<\/ol>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading -->\r\n<h2>EPDM Butterfly Valve - China Manufacturers, Factory, Suppliers<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nWe'll make each hard work to become excellent and excellent, and speed up our measures for standing from the rank of intercontinental top-grade and high-tech enterprises for Epdm Butterfly Valve, Rubber Lined Double Flange Butterfly Valve, Butterfly Valve Wafer, Electric Actuator Butterfly Valve, Lug Support Butterfly Valve. We warmly welcome friends from all walks of existence to cooperate with us. The product will supply to all over the world, such as in Europe, America, Australia, Zurich, Mexico, Greece, and Azerbaijan. We have top engineers in these industries and an efficient team in the research. What is more, we have our own archives mouths and markets in China at a low cost. Therefore, we can meet different inquiries from different clients. Please find our website to check more information about our products.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":7,"filter":"raw"},{"term_id":2519,"name":"Concentric Butterfly Valve","slug":"concentric-butterfly-valve","term_group":0,"term_taxonomy_id":2519,"taxonomy":"post_tag","description":"","parent":0,"count":5,"filter":"raw"},{"term_id":2211,"name":"Double Offset butterfly valve","slug":"double-offset-butterfly-valve","term_group":0,"term_taxonomy_id":2211,"taxonomy":"post_tag","description":"","parent":0,"count":7,"filter":"raw"},{"term_id":2184,"name":"triple offset butterfly valve","slug":"triple-offset-butterfly-valve","term_group":0,"term_taxonomy_id":2184,"taxonomy":"post_tag","description":"","parent":0,"count":8,"filter":"raw"}],"taxonomy_info":{"category":[{"value":2210,"label":"Butterfly Valve"}],"post_tag":[{"value":1957,"label":"butterfly valve"},{"value":3657,"label":"Center line Butterfly Valve"},{"value":3192,"label":"China EPDM Butterfly Valve"},{"value":2519,"label":"Concentric Butterfly Valve"},{"value":2211,"label":"Double Offset butterfly valve"},{"value":2184,"label":"triple offset butterfly valve"}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Choose Concentric Butterfly Valve Double Offset Butterfly Valve and Triple Offset Butterfly Valve - ZECO Valve<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zecovalve.com\/fr\/how-to-choose-concentric-butterfly-valve-double-offset-butterfly-valve-and-triple-offset-butterfly-valve.html\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Choose Concentric Butterfly Valve Double Offset Butterfly Valve and Triple Offset Butterfly Valve - ZECO Valve\" \/>\n<meta property=\"og:description\" content=\"There are four types of butterfly valves, concentric butterfly valve, single eccentric butterfly valve, double offset butterfly valve and triple offset butterfly ... 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