{"id":15689,"date":"2026-06-01T09:00:00","date_gmt":"2026-06-01T01:00:00","guid":{"rendered":"https:\/\/www.xintaivalves.com\/?p=15689"},"modified":"2026-06-25T12:29:28","modified_gmt":"2026-06-25T04:29:28","slug":"technical-guide-centric-butterfly-valve","status":"publish","type":"post","link":"https:\/\/www.xintaivalves.com\/fa\/blog\/butterfly-valve\/technical-guide-centric-butterfly-valve\/","title":{"rendered":"\u06f1. \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0633\u0646\u062a\u0631\u06cc\u06a9 \u0686\u06cc\u0633\u062a\u061f \u0631\u0627\u0647\u0646\u0645\u0627\u06cc \u06a9\u0627\u0645\u0644 \u0628\u0631\u0627\u06cc \u062e\u0631\u06cc\u062f\u0627\u0631\u0627\u0646 \u0635\u0646\u0639\u062a\u06cc"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 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\">\u0641\u0647\u0631\u0633\u062a \u0645\u0637\u0627\u0644\u0628<\/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=\"Change Table of Contents Status\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u062a\u063a\u06cc\u06cc\u0631 \u0648\u0636\u0639\u06cc\u062a<\/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 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.xintaivalves.com\/fa\/blog\/butterfly-valve\/technical-guide-centric-butterfly-valve\/#How_a_Centric_Butterfly_Valve_Works\" >\u0646\u062d\u0648\u0647 \u06a9\u0627\u0631\u06a9\u0631\u062f \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0633\u0646\u062a\u0631\u06cc\u06a9<\/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.xintaivalves.com\/fa\/blog\/butterfly-valve\/technical-guide-centric-butterfly-valve\/#Types_of_Centric_Butterfly_Valves_by_End_Connection\" >\u0627\u0646\u0648\u0627\u0639 \u0634\u06cc\u0631\u0647\u0627\u06cc \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0633\u0646\u062a\u0631\u06cc\u06a9 \u0628\u0631 \u0627\u0633\u0627\u0633 \u0646\u0648\u0639 \u0627\u062a\u0635\u0627\u0644 \u0627\u0646\u062a\u0647\u0627\u06cc\u06cc<\/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:\/\/www.xintaivalves.com\/fa\/blog\/butterfly-valve\/technical-guide-centric-butterfly-valve\/#Wafer_Type_Butterfly_Valve\" >\u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u0646\u0648\u0639 \u0648\u06cc\u0641\u0631<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.xintaivalves.com\/fa\/blog\/butterfly-valve\/technical-guide-centric-butterfly-valve\/#Lug_Type_Butterfly_Valve\" >\u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u0646\u0648\u0639 \u0644\u0648\u06af<\/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.xintaivalves.com\/fa\/blog\/butterfly-valve\/technical-guide-centric-butterfly-valve\/#Double_Flanged_Butterfly_Valve\" >\u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u062f\u0648 \u0641\u0644\u0646\u062c\u06cc<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.xintaivalves.com\/fa\/blog\/butterfly-valve\/technical-guide-centric-butterfly-valve\/#What_are_the_Differences_Between_a_Centric_vs_Double_Offset_Butterfly_Valve\" >\u062a\u0641\u0627\u0648\u062a \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0633\u0646\u062a\u0631\u06cc\u06a9 \u0648 \u062f\u0648 \u0622\u0641\u0633\u062a \u0686\u06cc\u0633\u062a\u061f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.xintaivalves.com\/fa\/blog\/butterfly-valve\/technical-guide-centric-butterfly-valve\/#Design_Specifications_and_Materials\" >\u0645\u0634\u062e\u0635\u0627\u062a \u0637\u0631\u0627\u062d\u06cc \u0648 \u0645\u0648\u0627\u062f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.xintaivalves.com\/fa\/blog\/butterfly-valve\/technical-guide-centric-butterfly-valve\/#What_Are_the_Strengths_and_Weaknesses_of_CentricConcentric_Valves\" >\u0646\u0642\u0627\u0637 \u0642\u0648\u062a \u0648 \u0636\u0639\u0641 \u0634\u06cc\u0631\u0647\u0627\u06cc \u0633\u0646\u062a\u0631\u06cc\u06a9\/\u0647\u0645\u200c\u0645\u0631\u06a9\u0632 \u0686\u06cc\u0633\u062a\u061f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.xintaivalves.com\/fa\/blog\/butterfly-valve\/technical-guide-centric-butterfly-valve\/#Where_Are_Concentric_or_Centric_Valves_Used_in_Industry\" >\u0634\u06cc\u0631\u0647\u0627\u06cc \u0647\u0645\u200c\u0645\u0631\u06a9\u0632 \u06cc\u0627 \u0633\u0646\u062a\u0631\u06cc\u06a9 \u062f\u0631 \u0635\u0646\u0639\u062a \u06a9\u062c\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f\u061f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.xintaivalves.com\/fa\/blog\/butterfly-valve\/technical-guide-centric-butterfly-valve\/#How_to_Select_the_Right_Centric_or_Center-line_Butterfly_Valve\" >\u0646\u062d\u0648\u0647 \u0627\u0646\u062a\u062e\u0627\u0628 \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0633\u0646\u062a\u0631\u06cc\u06a9 \u06cc\u0627 \u0633\u0646\u062a\u0631 \u0644\u0627\u06cc\u0646 \u0645\u0646\u0627\u0633\u0628<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.xintaivalves.com\/fa\/blog\/butterfly-valve\/technical-guide-centric-butterfly-valve\/#Conclusion\" >\u0646\u062a\u06cc\u062c\u0647<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">\u0627\u06cc\u0646 <strong>\u0633\u0646\u062a\u0631\u06cc\u06a9<\/strong><a href=\"https:\/\/www.xintaivalves.com\/fa\/product\/centerline-wafer-type-butterfly-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong> \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc<\/strong><\/a> \u06cc\u06a9 \u0634\u06cc\u0631 \u06cc\u06a9\u200c\u0686\u0647\u0627\u0631\u0645 \u062f\u0648\u0631 \u0628\u0627 \u0633\u0627\u0642\u0647 \u0648 \u062f\u06cc\u0633\u06a9 \u0645\u0631\u06a9\u0632\u06cc \u0627\u0633\u062a \u06a9\u0647 \u06a9\u0646\u062a\u0631\u0644 \u062c\u0631\u06cc\u0627\u0646 \u0631\u0648\u0634\u0646\/\u062e\u0627\u0645\u0648\u0634 \u0631\u0627 \u062f\u0631 \u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u0644\u0648\u0644\u0647\u200c\u06a9\u0634\u06cc \u0635\u0646\u0639\u062a\u06cc \u0641\u0631\u0627\u0647\u0645 \u0645\u06cc\u200c\u06a9\u0646\u062f. \u0647\u0645\u0686\u0646\u06cc\u0646 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0647\u0645\u200c\u0645\u0631\u06a9\u0632\u060c \u0633\u0646\u062a\u0631 \u0644\u0627\u06cc\u0646 \u06cc\u0627 \u0635\u0641\u0631 \u0622\u0641\u0633\u062a \u0646\u06cc\u0632 \u0634\u0646\u0627\u062e\u062a\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0639\u0645\u0644\u06a9\u0631\u062f \u0633\u0627\u062f\u0647 \u06cc\u06a9\u200c\u0686\u0647\u0627\u0631\u0645 \u062f\u0648\u0631 \u0622\u0646 \u062f\u0644\u06cc\u0644 \u0627\u0635\u0644\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0622\u0646 \u062f\u0631 <a href=\"https:\/\/www.xintaivalves.com\/fa\/blog\/valves-for-water-treatment\/\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/www.xintaivalves.com\/blog\/valves-for-water-treatment\/\" rel=\"noreferrer noopener\">\u062a\u0635\u0641\u06cc\u0647 \u0622\u0628<\/a>, \u060c \u062a\u0648\u0644\u06cc\u062f \u0628\u0631\u0642 \u0648 \u0635\u0646\u0627\u06cc\u0639 \u0641\u0631\u0622\u0648\u0631\u06cc \u0634\u06cc\u0645\u06cc\u0627\u06cc\u06cc \u0627\u0633\u062a.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0627\u06cc\u0646 \u0631\u0627\u0647\u0646\u0645\u0627 \u0627\u0637\u0644\u0627\u0639\u0627\u062a\u06cc \u062f\u0631 \u0645\u0648\u0631\u062f \u0637\u0631\u0627\u062d\u06cc <strong>\u0634\u06cc\u0631\u0647\u0627\u06cc \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0647\u0645\u200c\u0645\u0631\u06a9\u0632<\/strong>, \u060c \u0639\u0645\u0644\u06a9\u0631\u062f\u060c \u0627\u0646\u0648\u0627\u0639\u060c \u0645\u0632\u0627\u06cc\u0627 \u0648 \u0632\u0645\u06cc\u0646\u0647\u200c\u0647\u0627\u06cc\u06cc \u06a9\u0647 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0627\u0632 \u0622\u0646\u0647\u0627 \u0628\u0627 \u0645\u0648\u0641\u0642\u06cc\u062a \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0631\u062f\u060c \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc\u200c\u062f\u0647\u062f.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_a_Centric_Butterfly_Valve_Works\"><\/span><strong><br>\u0646\u062d\u0648\u0647 \u06a9\u0627\u0631\u06a9\u0631\u062f \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0633\u0646\u062a\u0631\u06cc\u06a9<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724722-1024x512.webp\" alt=\"\u0646\u062d\u0648\u0647 \u06a9\u0627\u0631\u06a9\u0631\u062f \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0633\u0646\u062a\u0631\u06cc\u06a9\" class=\"wp-image-15691\" style=\"width:564px;height:auto\" srcset=\"https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724722-1024x512.webp 1024w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724722-300x150.webp 300w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724722-768x384.webp 768w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724722-18x9.webp 18w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724722.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A centric or concentric valve works with a simple, quarter-turn operation and straightforward design. Knowing this operating principle helps you match the valve to the right service condition.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This zero-offset configuration features three components aligned on a single central axis: the stem, the disc, and the valve body. Because this concentric alignment serves as its defining structural feature, it is classified as a concentric or zero-offset butterfly valve.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The disc mounts on a centered shaft and sits directly in the flow path. Rotating the shaft 90 degrees moves the disc from fully open (parallel to flow) to fully closed (perpendicular to flow).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At the closed position, the disc compresses against a resilient elastomeric seat ring. The seat ring deforms slightly under pressure. This elastic deformation creates a bubble-tight seal that prevents leakage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This elastic deformation yields a bubble-tight, zero-leakage bi-directional shut-off certified to API 598 testing standards. It is also known as a resilient seated butterfly valve because of this elastomeric seat design.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Types_of_Centric_Butterfly_Valves_by_End_Connection\"><\/span><strong>\u0627\u0646\u0648\u0627\u0639 \u0634\u06cc\u0631\u0647\u0627\u06cc \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0633\u0646\u062a\u0631\u06cc\u06a9 \u0628\u0631 \u0627\u0633\u0627\u0633 \u0646\u0648\u0639 \u0627\u062a\u0635\u0627\u0644 \u0627\u0646\u062a\u0647\u0627\u06cc\u06cc<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724723-1024x512.webp\" alt=\"3 \u0646\u0648\u0639 \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u0645\u0631\u06a9\u0632\u06cc \u0628\u0631 \u0627\u0633\u0627\u0633 \u0627\u062a\u0635\u0627\u0644 \u0627\u0646\u062a\u0647\u0627\u06cc\u06cc\" class=\"wp-image-15692\" style=\"width:646px;height:auto\" srcset=\"https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724723-1024x512.webp 1024w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724723-300x150.webp 300w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724723-768x384.webp 768w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724723-18x9.webp 18w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724723.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">There are three main end connection types that serve different installation and service needs. Choosing the right one affects installation cost, maintenance access, and long-term performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Wafer_Type_Butterfly_Valve\"><\/span><strong>\u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u0646\u0648\u0639 \u0648\u06cc\u0641\u0631<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The wafer-type butterfly valve fits between two pipe flanges using through-bolts. The valve body has no integral flanges. This keeps the design compact and lightweight.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The wafer type is the most cost-effective option for general service. Standard <strong>wafer TYPE butterfly valve Dimensions<\/strong> follow API 609, BS EN 558-1, and ASME B16.10. The size range covers DN 40 to DN 600.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Lug_Type_Butterfly_Valve\"><\/span><strong>\u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u0646\u0648\u0639 \u0644\u0648\u06af<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0627\u06cc\u0646 <strong>\u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u0627\u0632 \u0646\u0648\u0639 \u0644\u0648\u06af<\/strong> features threaded inserts cast into the valve body. Each pipe flange bolts to the valve independently. This allows one side of the pipeline to be removed without disturbing the other side.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It suits dead-end service and systems that require periodic removal of downstream piping. Process plants and water distribution networks use this type frequently.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Double_Flanged_Butterfly_Valve\"><\/span><strong>\u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u062f\u0648 \u0641\u0644\u0646\u062c\u06cc<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0627\u06cc\u0646 <strong>double-flanged butterfly valve<\/strong> has integral flanges on both ends. It bolts directly to matching pipe flanges. The heavier body suits larger pipe sizes and more demanding service conditions. This is entirely different from a <strong>\u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u062f\u0648 \u0637\u0631\u0641\u0647\u060c \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u062f\u0648 \u0637\u0631\u0641\u0647,<\/strong> which will be discussed in the next section.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Water mains, power plant cooling circuits, and large-diameter industrial pipelines use this type. Request the <strong>double-flanged butterfly valve catalogue<\/strong> from Xintai Valve for configuration details.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_are_the_Differences_Between_a_Centric_vs_Double_Offset_Butterfly_Valve\"><\/span><strong>\u062a\u0641\u0627\u0648\u062a \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0633\u0646\u062a\u0631\u06cc\u06a9 \u0648 \u062f\u0648 \u0622\u0641\u0633\u062a \u0686\u06cc\u0633\u062a\u061f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The main difference between a centric and a <strong><a href=\"https:\/\/www.xintaivalves.com\/fa\/knowledge-center\/difference-between-double-offset-and-triple-offset-butterfly-valve\/\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/www.xintaivalves.com\/knowledge-center\/difference-between-double-offset-and-triple-offset-butterfly-valve\/\" rel=\"noreferrer noopener\">double offset butterfly valve<\/a><\/strong> is in the stem or disc alignment.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Knowing the key differences saves time and prevents costly specification errors.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Centric or zero-offset butterfly valve<\/strong>: The stem aligns with the disc and body centerlines. The seat is a soft elastomeric material. It handles standard pressure classes: PN 6, PN 10, PN 16, and Class 150. It suits clean or mildly corrosive liquids and gases.<\/li>\n\n\n\n<li><strong>Double offset butterfly valve<\/strong>: The stem has two offsets from the disc centerline. The seat is metal or PTFE. It handles higher pressures, elevated temperatures, and abrasive media. It costs more but extends service life in demanding conditions.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0622 <strong>centric butterfly valve manual<\/strong> typically covers quarter-turn operation using a hand lever or gearbox. The ISO 5211 mounting pad accommodates electric, pneumatic, and hydraulic actuators.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Design_Specifications_and_Materials\"><\/span><strong>\u0645\u0634\u062e\u0635\u0627\u062a \u0637\u0631\u0627\u062d\u06cc \u0648 \u0645\u0648\u0627\u062f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">These parameters define the operating envelope of a standard-centric or zero-offset butterfly valve. Use them to verify compatibility with your piping system before specifying.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>\u067e\u0627\u0631\u0627\u0645\u062a\u0631<\/strong><\/td><td><strong>\u0627\u0631\u0632\u0634<\/strong><\/td><\/tr><tr><td><strong>\u0645\u062d\u062f\u0648\u062f\u0647 \u0627\u0646\u062f\u0627\u0632\u0647<\/strong><\/td><td>DN 40 to DN 600<\/td><\/tr><tr><td><strong>\u0627\u0646\u062f\u0627\u0632\u0647 \u06af\u06cc\u0631\u06cc \u0641\u0634\u0627\u0631<\/strong><\/td><td>PN 6 \/ PN 10 \/ PN 16 \/ Class 150<\/td><\/tr><tr><td><strong>\u0627\u0633\u062a\u0627\u0646\u062f\u0627\u0631\u062f \u0637\u0631\u0627\u062d\u06cc<\/strong><\/td><td>API 609 \/ BS EN 593 \/ IS: 13095<\/td><\/tr><tr><td><strong>\u0631\u0648 \u062f\u0631 \u0631\u0648 \u0627\u0628\u0639\u0627\u062f.<\/strong><\/td><td>API 609 \/ BS EN 558-1 \/ ASME B16.10<\/td><\/tr><tr><td><strong>\u0627\u0633\u062a\u0627\u0646\u062f\u0627\u0631\u062f \u062a\u0633\u062a<\/strong><\/td><td>API 598 \/ BS EN 12266 Part 1<\/td><\/tr><tr><td><strong>\u0646\u0635\u0628 \u0639\u0645\u0644\u06af\u0631<\/strong><\/td><td>ISO 5211<\/td><\/tr><tr><td><strong>\u0633\u0648\u0631\u0627\u062e\u06a9\u0627\u0631\u06cc \u0641\u0644\u0646\u062c<\/strong><\/td><td>\u0627\u0633\u062a\u0627\u0646\u062f\u0627\u0631\u062f ASME B16.5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0645\u0648\u0627\u062f \u0628\u062f\u0646\u0647 \u0648 \u062f\u06cc\u0633\u06a9: <\/strong>\u0686\u062f\u0646\u060c \u0686\u062f\u0646 \u062f\u0627\u06a9\u062a\u06cc\u0644 (\u0628\u0627 \u067e\u0648\u0634\u0634 \u0646\u0627\u06cc\u0644\u0648\u0646 \u06cc\u0627 \u0627\u067e\u0648\u06a9\u0633\u06cc)\u060c CF8\u060c CF8M.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0645\u0648\u0627\u062f \u0644\u0627\u06cc\u0646\u0631 \u0646\u0634\u06cc\u0645\u0646\u06af\u0627\u0647: <\/strong>EPDM\u060c NBR\u060c Viton\u060c \u0633\u06cc\u0644\u06cc\u06a9\u0648\u0646\u060c PTFE\u060c Hypalon \u0648 \u0646\u0626\u0648\u067e\u0631\u0646. \u0645\u0627\u062f\u0647 \u0646\u0634\u06cc\u0645\u0646\u06af\u0627\u0647 \u0631\u0627 \u0628\u0631 \u0627\u0633\u0627\u0633 \u0633\u06cc\u0627\u0644 \u0648 \u062e\u0648\u0627\u0635 \u0634\u06cc\u0645\u06cc\u0627\u06cc\u06cc \u0622\u0646 \u0627\u0646\u062a\u062e\u0627\u0628 \u06a9\u0646\u06cc\u062f.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0637\u0631\u0627\u062d\u06cc \u0633\u0627\u0642\u0647: <\/strong>\u0633\u0627\u0642\u0647 \u0636\u062f \u0627\u0646\u0641\u062c\u0627\u0631. \u0627\u0632 \u0628\u06cc\u0631\u0648\u0646 \u0632\u062f\u0646 \u0633\u0627\u0642\u0647 \u062a\u062d\u062a \u0641\u0634\u0627\u0631 \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0645\u06cc \u06a9\u0646\u062f. \u0627\u0645\u06a9\u0627\u0646 \u062c\u062f\u0627\u0633\u0627\u0632\u06cc \u0627\u06cc\u0645\u0646 \u0634\u06cc\u0631 \u0631\u0627 \u0641\u0631\u0627\u0647\u0645 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0646\u0634\u06cc\u0645\u0646\u06af\u0627\u0647: <\/strong>\u0637\u0631\u0627\u062d\u06cc \u0646\u0634\u06cc\u0645\u0646\u06af\u0627\u0647 \u0642\u0641\u0644 \u0645\u0631\u06a9\u0632\u06cc\u060c \u062d\u0631\u06a9\u062a \u0646\u0634\u06cc\u0645\u0646\u06af\u0627\u0647 \u0631\u0627 \u062f\u0631 \u062d\u06cc\u0646 \u0646\u0634\u0633\u062a\u0646 \u0648 \u0628\u0644\u0646\u062f \u0634\u062f\u0646 \u062f\u06cc\u0633\u06a9 \u0627\u0632 \u0628\u06cc\u0646 \u0645\u06cc \u0628\u0631\u062f.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Are_the_Strengths_and_Weaknesses_of_CentricConcentric_Valves\"><\/span><strong>\u0646\u0642\u0627\u0637 \u0642\u0648\u062a \u0648 \u0636\u0639\u0641 \u0634\u06cc\u0631\u0647\u0627\u06cc \u0633\u0646\u062a\u0631\u06cc\u06a9\/\u0647\u0645\u200c\u0645\u0631\u06a9\u0632 \u0686\u06cc\u0633\u062a\u061f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0628\u0631\u0627\u06cc \u06a9\u0645\u06a9 \u0628\u0647 \u062e\u0631\u06cc\u062f\u0627\u0631\u0627\u0646 \u062f\u0631 \u0627\u0646\u062a\u062e\u0627\u0628 \u0622\u06af\u0627\u0647\u0627\u0646\u0647\u060c \u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u0645\u0642\u0627\u06cc\u0633\u0647\u200c\u0627\u06cc \u0627\u0632 \u0645\u0632\u0627\u06cc\u0627 \u0648 \u0645\u0639\u0627\u06cc\u0628 \u0634\u06cc\u0631\u0647\u0627\u06cc \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0647\u0645\u200c\u0645\u0631\u06a9\u0632 \u06cc\u0627 \u0635\u0641\u0631- \u0622\u0641\u0633\u062a \u0622\u0648\u0631\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>\u0645\u0632\u0627\u06cc\u0627\u06cc<\/strong><\/td><td><strong>\u0645\u0639\u0627\u06cc\u0628<\/strong><\/td><\/tr><tr><td>\u0628\u062f\u0646\u0647 \u0641\u0634\u0631\u062f\u0647 \u0648 \u0633\u0628\u06a9. \u0646\u06cc\u0627\u0632 \u0628\u0647 \u067e\u0634\u062a\u06cc\u0628\u0627\u0646\u06cc \u0644\u0648\u0644\u0647 \u0648 \u0646\u06cc\u0631\u0648\u06cc \u06a9\u0627\u0631 \u0631\u0627 \u062f\u0631 \u062d\u06cc\u0646 \u0646\u0635\u0628 \u06a9\u0627\u0647\u0634 \u0645\u06cc \u062f\u0647\u062f.<\/td><td>\u0637\u0631\u0627\u062d\u06cc \u0646\u0631\u0645-\u0633\u06cc\u0644\u060c \u0633\u0631\u0648\u06cc\u0633 \u0631\u0627 \u0628\u0647 \u06a9\u0644\u0627\u0633\u200c\u0647\u0627\u06cc \u0641\u0634\u0627\u0631 PN 6 \u062a\u0627 PN 16 \/ Class 150 \u0645\u062d\u062f\u0648\u062f \u0645\u06cc\u200c\u06a9\u0646\u062f.<\/td><\/tr><tr><td>\u06af\u0634\u062a\u0627\u0648\u0631 \u0639\u0645\u0644\u06cc\u0627\u062a\u06cc \u067e\u0627\u06cc\u06cc\u0646. \u0627\u0645\u06a9\u0627\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0639\u0645\u0644\u06af\u0631\u0647\u0627\u06cc \u06a9\u0648\u0686\u06a9\u062a\u0631 \u0648 \u06a9\u0645\u200c\u0647\u0632\u06cc\u0646\u0647\u200c\u062a\u0631 \u0631\u0627 \u0641\u0631\u0627\u0647\u0645 \u0645\u06cc\u200c\u06a9\u0646\u062f.<\/td><td>\u0628\u0631\u0627\u06cc \u0628\u062e\u0627\u0631 \u0628\u0627 \u062f\u0645\u0627\u06cc \u0628\u0627\u0644\u0627 \u0628\u062f\u0648\u0646 \u0627\u0646\u062a\u062e\u0627\u0628 \u0635\u062d\u06cc\u062d \u0645\u0627\u062f\u0647 \u0646\u0634\u06cc\u0645\u0646\u06af\u0627\u0647 \u062a\u0648\u0635\u06cc\u0647 \u0646\u0645\u06cc\u200c\u0634\u0648\u062f.<\/td><\/tr><tr><td>\u0642\u0637\u0639\u0627\u062a \u0645\u062a\u062d\u0631\u06a9 \u06a9\u0645. \u0641\u0631\u06a9\u0627\u0646\u0633 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0648 \u06a9\u0644 \u0647\u0632\u06cc\u0646\u0647 \u0686\u0631\u062e\u0647 \u0639\u0645\u0631 \u0631\u0627 \u06a9\u0627\u0647\u0634 \u0645\u06cc \u062f\u0647\u062f.<\/td><td>\u062f\u06cc\u0633\u06a9 \u062f\u0631 \u0647\u0646\u06af\u0627\u0645 \u0628\u0627\u0632 \u0628\u0648\u062f\u0646 \u062f\u0631 \u0645\u0633\u06cc\u0631 \u062c\u0631\u06cc\u0627\u0646 \u0628\u0627\u0642\u06cc \u0645\u06cc\u200c\u0645\u0627\u0646\u062f. \u0627\u06cc\u0646 \u0627\u0645\u0631 \u0628\u0627\u0639\u062b \u0627\u0641\u062a \u0641\u0634\u0627\u0631 \u06a9\u0645 \u0627\u0645\u0627 \u0642\u0627\u0628\u0644 \u0627\u0646\u062f\u0627\u0632\u0647\u200c\u06af\u06cc\u0631\u06cc \u0645\u06cc\u200c\u0634\u0648\u062f.<\/td><\/tr><tr><td>\u0642\u0637\u0639 \u062f\u0648 \u0637\u0631\u0641\u0647. \u062f\u0631 \u0647\u0631 \u062f\u0648 \u062c\u0647\u062a \u062c\u0631\u06cc\u0627\u0646 \u0622\u0628\u200c\u0628\u0646\u062f\u06cc \u0645\u06cc\u200c\u06a9\u0646\u062f.<\/td><td><\/td><\/tr><tr><td>\u0637\u06cc\u0641 \u06af\u0633\u062a\u0631\u062f\u0647\u200c\u0627\u06cc \u0627\u0632 \u0645\u0648\u0627\u062f \u0646\u0634\u06cc\u0645\u0646\u06af\u0627\u0647. \u0627\u06a9\u062b\u0631 \u0645\u0627\u06cc\u0639\u0627\u062a\u060c \u06af\u0627\u0632\u0647\u0627 \u0648 \u067e\u0648\u062f\u0631\u0647\u0627 \u0631\u0627 \u0645\u062f\u06cc\u0631\u06cc\u062a \u0645\u06cc\u200c\u06a9\u0646\u062f.<\/td><td><\/td><\/tr><tr><td>\u062d\u0641\u0631\u0647 \u0628\u062f\u0646\u0647 \u0647\u0645\u200c\u0627\u0646\u062f\u0627\u0632\u0647 \u062e\u0637. \u062c\u0631\u06cc\u0627\u0646 \u0631\u0627 \u0628\u0647 \u062d\u062f\u0627\u06a9\u062b\u0631 \u0645\u06cc\u200c\u0631\u0633\u0627\u0646\u062f \u0648 \u0627\u0641\u062a \u0641\u0634\u0627\u0631 \u0631\u0627 \u0628\u0647 \u062d\u062f\u0627\u0642\u0644 \u0645\u06cc\u200c\u0631\u0633\u0627\u0646\u062f.<\/td><td><\/td><\/tr><tr><td>\u0647\u0645 \u0648\u0638\u0627\u06cc\u0641 \u062c\u062f\u0627\u0633\u0627\u0632\u06cc \u0631\u0648\u0634\u0646\/\u062e\u0627\u0645\u0648\u0634 \u0648 \u0647\u0645 \u0648\u0638\u0627\u06cc\u0641 \u062a\u0646\u0638\u06cc\u0645\/\u06a9\u0646\u062a\u0631\u0644 \u062c\u0631\u06cc\u0627\u0646 \u0631\u0627 \u0627\u0646\u062c\u0627\u0645 \u0645\u06cc\u200c\u062f\u0647\u062f.<\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Where_Are_Concentric_or_Centric_Valves_Used_in_Industry\"><\/span><strong>\u0634\u06cc\u0631\u0647\u0627\u06cc \u0647\u0645\u200c\u0645\u0631\u06a9\u0632 \u06cc\u0627 \u0633\u0646\u062a\u0631\u06cc\u06a9 \u062f\u0631 \u0635\u0646\u0639\u062a \u06a9\u062c\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f\u061f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724724-1024x512.webp\" alt=\"\u0634\u06cc\u0631\u0647\u0627\u06cc \u0645\u0631\u06a9\u0632\u06cc \u06cc\u0627 \u0647\u0645 \u0645\u0631\u06a9\u0632 \u0645\u0648\u0631\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u062f\u0631 \u0635\u0646\u0639\u062a\" class=\"wp-image-15693\" style=\"width:686px;height:auto\" srcset=\"https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724724-1024x512.webp 1024w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724724-300x150.webp 300w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724724-768x384.webp 768w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724724-18x9.webp 18w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2026\/06\/\u56fe\u724724.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u0627\u06cc\u0646 <strong>\u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0647\u0645\u200c\u0645\u0631\u06a9\u0632<\/strong> \u0637\u06cc\u0641 \u06af\u0633\u062a\u0631\u062f\u0647\u200c\u0627\u06cc \u0627\u0632 \u0635\u0646\u0627\u06cc\u0639 \u0631\u0627 \u067e\u0648\u0634\u0634 \u0645\u06cc\u200c\u062f\u0647\u062f. \u0633\u0627\u0632\u06af\u0627\u0631\u06cc \u0622\u0646 \u0628\u0627 \u0631\u0633\u0627\u0646\u0647\u200c\u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641\u060c \u0627\u0646\u062f\u0627\u0632\u0647\u200c\u0647\u0627\u06cc \u0644\u0648\u0644\u0647 \u0648 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc \u0641\u0639\u0627\u0644\u200c\u0633\u0627\u0632\u06cc\u060c \u067e\u0630\u06cc\u0631\u0634 \u06af\u0633\u062a\u0631\u062f\u0647\u200c\u0627\u06cc \u0631\u0627 \u0647\u062f\u0627\u06cc\u062a \u0645\u06cc\u200c\u06a9\u0646\u062f.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0627\u06cc\u0646 \u0634\u06cc\u0631\u0647\u0627 \u0639\u0645\u062f\u062a\u0627\u064b \u062f\u0631 \u0645\u0648\u0627\u0631\u062f \u0632\u06cc\u0631 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u062a\u0635\u0641\u06cc\u0647 \u0622\u0628 \u0648 \u0641\u0627\u0636\u0644\u0627\u0628: <\/strong>\u0627\u0646\u0639\u0642\u0627\u062f\u060c \u062a\u0647\u200c\u0646\u0634\u06cc\u0646\u06cc\u060c \u0641\u06cc\u0644\u062a\u0631\u0627\u0633\u06cc\u0648\u0646 \u0648 \u06af\u0646\u062f\u0632\u062f\u0627\u06cc\u06cc. \u0646\u0631\u062e \u062c\u0631\u06cc\u0627\u0646 \u0628\u0627\u0644\u0627 \u0631\u0627 \u0628\u0627 \u0642\u0637\u0639 \u0645\u062d\u06a9\u0645 \u0645\u062f\u06cc\u0631\u06cc\u062a \u0645\u06cc\u200c\u06a9\u0646\u062f.<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.xintaivalves.com\/fa\/blog\/gate-valve\/power-plant-valves-guide-types-functions\/\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/www.xintaivalves.com\/blog\/gate-valve\/power-plant-valves-guide-types-functions\/\" rel=\"noreferrer noopener\">\u062a\u0648\u0644\u06cc\u062f \u0628\u0631\u0642<\/a>: <\/strong>\u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u0622\u0628 \u062e\u0646\u06a9\u200c\u06a9\u0646\u0646\u062f\u0647\u060c \u062e\u0637\u0648\u0637 \u0644\u0648\u0644\u0647 \u0645\u06cc\u0639\u0627\u0646 \u0648 \u062e\u062f\u0645\u0627\u062a \u06a9\u0645\u06a9\u06cc.<\/li>\n\n\n\n<li><strong>\u067e\u0631\u062f\u0627\u0632\u0634 \u0634\u06cc\u0645\u06cc\u0627\u06cc\u06cc \u0648 \u067e\u062a\u0631\u0648\u0634\u06cc\u0645\u06cc: <\/strong>\u06af\u0632\u06cc\u0646\u0647\u200c\u0647\u0627\u06cc \u0646\u0634\u06cc\u0645\u0646\u06af\u0627\u0647 PTFE \u0648 Viton \u062f\u0631 \u0628\u0631\u0627\u0628\u0631 \u0631\u0633\u0627\u0646\u0647\u200c\u0647\u0627\u06cc \u0634\u06cc\u0645\u06cc\u0627\u06cc\u06cc \u062a\u0647\u0627\u062c\u0645\u06cc \u0645\u0642\u0627\u0648\u0645\u062a \u0645\u06cc\u200c\u06a9\u0646\u0646\u062f.<\/li>\n\n\n\n<li><strong>\u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u062a\u0647\u0648\u06cc\u0647 \u0645\u0637\u0628\u0648\u0639: <\/strong>\u062a\u0648\u0632\u06cc\u0639 \u0622\u0628 \u0633\u0631\u062f\u060c \u0622\u0628 \u06af\u0631\u0645 \u0648 \u0628\u062e\u0627\u0631 \u062f\u0631 \u0648\u0627\u062d\u062f\u0647\u0627\u06cc \u0647\u0648\u0627\u0633\u0627\u0632 \u0648 \u06a9\u0627\u0646\u0627\u0644\u200c\u06a9\u0634\u06cc.<\/li>\n\n\n\n<li><strong>\u062d\u0641\u0627\u0638\u062a \u062f\u0631 \u0628\u0631\u0627\u0628\u0631 \u0622\u062a\u0634: <\/strong>\u0634\u0628\u06a9\u0647\u200c\u0647\u0627\u06cc \u0647\u06cc\u062f\u0631\u0627\u0646\u062a \u0622\u0628\u060c \u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u0627\u0633\u067e\u0631\u06cc\u0646\u06a9\u0644\u0631 \u0648 \u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u0627\u0637\u0641\u0627\u0621 \u062d\u0631\u06cc\u0642 \u0641\u0648\u0645.<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.xintaivalves.com\/fa\/blog\/mining-industry-valve\/\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/www.xintaivalves.com\/blog\/mining-industry-valve\/\" rel=\"noreferrer noopener\">\u0645\u0639\u062f\u0646<\/a> \u0648 \u0641\u0631\u0622\u0648\u0631\u06cc \u0645\u0648\u0627\u062f \u0645\u0639\u062f\u0646\u06cc: <\/strong>\u062c\u0627\u0628\u062c\u0627\u06cc\u06cc \u062f\u0648\u063a\u0627\u0628 \u0628\u0627 \u062f\u06cc\u0633\u06a9 \u0641\u0648\u0644\u0627\u062f \u0636\u062f \u0632\u0646\u06af \u06a9\u0631\u0648\u0645 \u0628\u0627\u0644\u0627 \u06cc\u0627 CF8M \u0648 \u0627\u0646\u062a\u062e\u0627\u0628 \u0646\u0634\u06cc\u0645\u0646\u06af\u0627\u0647 \u0645\u0642\u0627\u0648\u0645 \u062f\u0631 \u0628\u0631\u0627\u0628\u0631 \u062e\u0648\u0631\u062f\u06af\u06cc.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Select_the_Right_Centric_or_Center-line_Butterfly_Valve\"><\/span><strong>\u0646\u062d\u0648\u0647 \u0627\u0646\u062a\u062e\u0627\u0628 \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0633\u0646\u062a\u0631\u06cc\u06a9 \u06cc\u0627 \u0633\u0646\u062a\u0631 \u0644\u0627\u06cc\u0646 \u0645\u0646\u0627\u0633\u0628<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0627\u0632 \u0627\u06cc\u0646 \u0686\u06a9 \u0644\u06cc\u0633\u062a \u0647\u062f\u0627\u06cc\u062a \u0634\u062f\u0647 \u0628\u0631\u0627\u06cc \u06a9\u0645\u06a9 \u0628\u0647 \u0627\u0646\u062a\u062e\u0627\u0628 \u0634\u06cc\u0631 \u0645\u0646\u0627\u0633\u0628 \u0628\u0631\u0627\u06cc \u0633\u06cc\u0633\u062a\u0645 \u062e\u0648\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f. \u0627\u06cc\u0646 \u06a9\u0627\u0631 \u0628\u0647 \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u062e\u0637\u0627\u0647\u0627\u06cc \u0639\u062f\u0645 \u062a\u0637\u0627\u0628\u0642 \u0648 \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u0647\u0632\u06cc\u0646\u0647\u200c\u0647\u0627\u06cc \u062a\u0639\u0645\u06cc\u0631 \u0648 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u06cc\u0627 \u062a\u0639\u0648\u06cc\u0636 \u06af\u0631\u0627\u0646 \u06a9\u0645\u06a9 \u0645\u06cc\u200c\u06a9\u0646\u062f.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u0646\u0648\u0639 \u0645\u0627\u062f\u0647 \u0686\u06cc\u0633\u062a\u061f <\/strong>\u0622\u06cc\u0627<strong> <\/strong>\u0645\u0627\u06cc\u0639\u060c \u06af\u0627\u0632\u060c \u062f\u0648\u063a\u0627\u0628 \u06cc\u0627 \u067e\u0648\u062f\u0631 \u0627\u0633\u062a\u061f<\/li>\n\n\n\n<li><strong>\u0641\u0634\u0627\u0631 \u0648 \u062f\u0645\u0627\u06cc \u0639\u0645\u0644\u06cc\u0627\u062a\u06cc \u0686\u0642\u062f\u0631 \u0627\u0633\u062a\u061f <\/strong>\u0631\u062a\u0628\u0647 PN \u0645\u0648\u0631\u062f \u0646\u06cc\u0627\u0632 \u0648 \u0633\u0627\u0632\u06af\u0627\u0631\u06cc \u0645\u0648\u0627\u062f \u0646\u0634\u06cc\u0645\u0646\u06af\u0627\u0647 \u0631\u0627 \u062a\u0623\u06cc\u06cc\u062f \u06a9\u0646\u06cc\u062f.<\/li>\n\n\n\n<li><strong>\u0646\u0648\u0639 \u0627\u062a\u0635\u0627\u0644 \u062e\u0637 \u0644\u0648\u0644\u0647 \u0686\u06cc\u0633\u062a\u061f <\/strong>\u0622\u06cc\u0627<strong> <\/strong>\u0648\u06cc\u0641\u0631\u060c \u0644\u0627\u06af \u06cc\u0627 \u062f\u0648 \u0641\u0644\u0646\u062c\u061f<\/li>\n\n\n\n<li><strong>\u0627\u0646\u062f\u0627\u0632\u0647 \u0644\u0648\u0644\u0647 (DN) \u0648 \u0627\u0628\u0639\u0627\u062f \u0631\u0648 \u0628\u0647 \u0631\u0648 \u0686\u0642\u062f\u0631 \u0627\u0633\u062a\u061f <\/strong>\u0647\u0645\u06cc\u0634\u0647<strong> <\/strong>\u0645\u0631\u0627\u062c\u0639\u0647 \u06a9\u0646\u06cc\u062f <strong>\u0628\u0647 \u0627\u0628\u0639\u0627\u062f \u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u0646\u0648\u0639 \u0648\u06cc\u0641\u0631<\/strong> \u062f\u0631 \u06a9\u0627\u062a\u0627\u0644\u0648\u06af \u0645\u062d\u0635\u0648\u0644.<\/li>\n\n\n\n<li><strong>\u06f1. \u0631\u0648\u0634 \u0641\u0639\u0627\u0644\u200c\u0633\u0627\u0632\u06cc \u0686\u06cc\u0633\u062a\u061f <\/strong>\u06f2. \u0622\u06cc\u0627 \u0627\u06cc\u0646 \u06cc\u06a9<strong> <\/strong>\u0627\u0647\u0631\u0645 \u062f\u0633\u062a\u06cc\u060c \u06af\u06cc\u0631\u0628\u06a9\u0633\u060c \u0645\u062d\u0631\u06a9 \u0627\u0644\u06a9\u062a\u0631\u06cc\u06a9\u06cc\u060c \u067e\u0646\u0648\u0645\u0627\u062a\u06cc\u06a9 \u06cc\u0627 \u0647\u06cc\u062f\u0631\u0648\u0644\u06cc\u06a9\u061f<\/li>\n\n\n\n<li><strong>\u0633\u0627\u0632\u06af\u0627\u0631\u06cc \u0634\u06cc\u0645\u06cc\u0627\u06cc\u06cc \u0631\u0627 \u0628\u0631\u0631\u0633\u06cc \u06a9\u0646\u06cc\u062f: <\/strong>\u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u062d\u0627\u0635\u0644 \u06a9\u0646\u06cc\u062f \u06a9\u0647 \u062c\u0646\u0633 \u0646\u0634\u06cc\u0645\u0646\u06af\u0627\u0647 \u0631\u0627 \u0628\u0631 \u0627\u0633\u0627\u0633 \u062e\u0648\u0627\u0635 \u0634\u06cc\u0645\u06cc\u0627\u06cc\u06cc \u0645\u062d\u06cc\u0637 \u0627\u0646\u062a\u062e\u0627\u0628 \u06a9\u0646\u06cc\u062f.<\/li>\n<\/ol>\n\n\n\n<style>\n  .hero-card {\n    display: flex;\n    flex-wrap: wrap;\n    align-items: center;\n    background: #f7f8fa;\n    border-radius: 16px;\n    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);\n    padding: 24px;\n    max-width: 900px;\n    margin: 40px auto;\n    font-family: 'Poppins', Arial, sans-serif;\n    text-decoration: none !important;\n    color: inherit;\n    transition: transform 0.3s ease, box-shadow 0.3s ease;\n  }\n\n  .hero-card:hover {\n    transform: translateY(-3px);\n    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);\n  }\n\n  .hero-image {\n    width: 220px;\n    height: auto;\n    border-radius: 12px;\n    object-fit: contain; \n    background: #ffffff;\n    flex-shrink: 0;\n  }\n\n  .hero-content {\n    padding-left: 24px;\n    flex: 1;\n    min-width: 260px;\n  }\n\n  .hero-title {\n    font-size: 1.6rem;\n    font-weight: bold;\n    margin-bottom: 12px;\n    color: #222;\n    font-family: 'Poppins', Arial, sans-serif;\n    text-transform: capitalize;\n  }\n\n  .hero-description {\n    font-size: 1rem;\n    color: #555;\n    margin-bottom: 18px;\n    line-height: 1.6;\n  }\n\n  .hero-link {\n    display: inline-block;\n    padding: 10px 20px;\n    background-color: #D70C19;\n    color: #fff !important;\n    text-decoration: none !important;\n    border-radius: 8px;\n    font-weight: bold;\n    transition: background 0.2s ease-in-out;\n  }\n\n  .hero-link:hover {\n    background-color: #a80913; \n  }\n\n  @media (max-width: 640px) {\n    .hero-card {\n      flex-direction: column;\n      text-align: center;\n    }\n    .hero-content {\n      padding-left: 0;\n      padding-top: 20px;\n    }\n    .hero-image {\n      width: 100%;\n      max-width: 280px;\n    }\n  }\n<\/style>\n\n<a class=\"hero-card\" href=\"https:\/\/www.xintaivalves.com\/fa\/products\/ptfe-lined-flanged-centerline-butterfly-valve\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n  <img decoding=\"async\" class=\"hero-image\" src=\"https:\/\/xintaivalves.b-cdn.net\/wp-content\/uploads\/2026\/06\/%E4%B8%AD%E7%BA%BF%E8%A1%AC%E6%B0%9F%E6%B3%95%E5%85%B0%E8%9D%B6%E9%98%80.jpg\" alt=\"\u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u062e\u0637 \u0645\u0631\u06a9\u0632\u06cc \u0641\u0644\u0646\u062c \u062f\u0627\u0631 \u0628\u0627 \u067e\u0648\u0634\u0634 PTFE \u0628\u0631\u0627\u06cc \u0645\u062d\u06cc\u0637 \u0647\u0627\u06cc \u062e\u0648\u0631\u0646\u062f\u0647\">\n  <div class=\"hero-content\">\n    <div class=\"hero-title\">\u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647\u200c\u0627\u06cc \u062e\u0637 \u0645\u0631\u06a9\u0632\u06cc \u0628\u0627 \u0622\u0633\u062a\u0631 PTFE \u0648 \u0641\u0644\u0646\u062c\u200c\u062f\u0627\u0631<\/div>\n    <div class=\"hero-description\">\n      <strong>\u0642\u0627\u0628\u0644\u06cc\u062a \u0627\u0635\u0644\u06cc:<\/strong> \u0628\u0647 \u0637\u0648\u0631 \u062e\u0627\u0635 \u0628\u0631\u0627\u06cc \u062c\u0627\u0628\u062c\u0627\u06cc\u06cc \u0645\u062d\u06cc\u0637 \u0647\u0627\u06cc \u0628\u0633\u06cc\u0627\u0631 \u062e\u0648\u0631\u0646\u062f\u0647 \u0645\u0647\u0646\u062f\u0633\u06cc \u0634\u062f\u0647 \u0627\u0633\u062a.<br>\n      <strong>\u06a9\u0627\u0631\u0628\u0631\u062f \u0635\u0646\u0639\u062a\u06cc:<\/strong> \u0631\u0627\u0647 \u062d\u0644 OEM \u0645\u0648\u0631\u062f \u0627\u0639\u062a\u0645\u0627\u062f \u0628\u0631\u0627\u06cc \u067e\u0631\u062f\u0627\u0632\u0634 \u0634\u06cc\u0645\u06cc\u0627\u06cc\u06cc\u060c \u062a\u0635\u0641\u06cc\u0647 \u0622\u0628\u060c \u062f\u0627\u0631\u0648\u0633\u0627\u0632\u06cc \u0648 \u062a\u0623\u0633\u06cc\u0633\u0627\u062a \u0635\u0646\u0639\u062a\u06cc.\n    <\/div>\n    <span class=\"hero-link\">\u0645\u0634\u062e\u0635\u0627\u062a \u0641\u0646\u06cc \u0631\u0627 \u0645\u0634\u0627\u0647\u062f\u0647 \u06a9\u0646\u06cc\u062f<\/span>\n  <\/div>\n<\/a>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>\u0646\u062a\u06cc\u062c\u0647<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0634\u06cc\u0631 \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u0645\u0631\u06a9\u0632\u06cc\u060c \u0628\u062f\u0648\u0646 \u0622\u0641\u0633\u062a \u06cc\u0627 \u062e\u0637 \u0645\u0631\u06a9\u0632\u06cc \u0628\u0647 \u062f\u0644\u06cc\u0644 \u0637\u0631\u0627\u062d\u06cc \u0633\u0627\u062f\u0647\u060c \u0647\u0632\u06cc\u0646\u0647 \u0639\u0645\u0644\u06cc\u0627\u062a\u06cc \u067e\u0627\u06cc\u06cc\u0646 \u0648 \u062f\u0627\u0645\u0646\u0647 \u06a9\u0627\u0631\u0628\u0631\u062f \u06af\u0633\u062a\u0631\u062f\u0647\u060c \u0628\u0631\u0627\u06cc \u0633\u06cc\u0633\u062a\u0645 \u0647\u0627\u06cc \u0635\u0646\u0639\u062a\u06cc \u0645\u0646\u0627\u0633\u0628 \u0627\u0633\u062a. \u0627\u06cc\u0646 \u0634\u06cc\u0631\u0647\u0627 \u0622\u0628\u060c \u06af\u0627\u0632\u060c \u0645\u0648\u0627\u062f \u0634\u06cc\u0645\u06cc\u0627\u06cc\u06cc \u0648 \u067e\u0648\u062f\u0631\u06cc \u0631\u0627 \u062f\u0631 \u0631\u0627\u06cc\u062c \u062a\u0631\u06cc\u0646 \u06a9\u0644\u0627\u0633 \u0647\u0627\u06cc \u0641\u0634\u0627\u0631 \u062c\u0627\u0628\u062c\u0627 \u0645\u06cc \u06a9\u0646\u0646\u062f.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.xintaivalves.com\/fa\/\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/www.xintaivalves.com\/blog\/how-xintai-valve-supports-large-scale-epc-projects-globally\/\" rel=\"noreferrer noopener\">\u0634\u06cc\u0631 Xintai<\/a> \u0634\u06cc\u0631\u0647\u0627\u06cc \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u0631\u0627 \u0645\u0637\u0627\u0628\u0642 \u0628\u0627 \u0627\u0633\u062a\u0627\u0646\u062f\u0627\u0631\u062f\u0647\u0627\u06cc API 609\u060c BS EN 593\u060c API 598\u060c ASME B16.10 \u0648 ISO 5211 \u0637\u0631\u0627\u062d\u06cc \u0645\u06cc \u06a9\u0646\u062f. \u0627\u06cc\u0646 \u0646\u0648\u0639 \u0634\u06cc\u0631\u0647\u0627\u06cc \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u0634\u0627\u0645\u0644 \u0645\u0648\u0627\u0631\u062f \u0647\u0645 \u0645\u0631\u06a9\u0632\u060c, <a href=\"https:\/\/www.xintaivalves.com\/fa\/product\/double-eccentric-butterfly-valves\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u062f\u0648 \u0628\u0631\u0627\u0628\u0631 \u062e\u0627\u0631\u062c \u0627\u0632 \u0645\u0631\u06a9\u0632<\/a>\u060c \u0648 <a href=\"https:\/\/www.xintaivalves.com\/fa\/product\/triple-eccentric-butterfly-valves\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u062f\u0631\u06cc\u0686\u0647 \u0647\u0627\u06cc \u067e\u0631\u0648\u0627\u0646\u0647 \u0627\u06cc \u063a\u06cc\u0631\u0639\u0627\u062f\u06cc \u0633\u0647 \u06af\u0627\u0646\u0647<\/a><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-vivid-red-background-color has-text-color has-background has-link-color has-medium-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/www.xintaivalves.com\/fa\/contact\/\" style=\"font-style:normal;font-weight:500\" target=\"_blank\" rel=\"noreferrer noopener\">\u062f\u0631\u06cc\u0627\u0641\u062a \u0642\u06cc\u0645\u062a<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>The centric butterfly valve is a quarter-turn valve with a centered stem and disc that provides on\/off flow control in industrial piping systems. It is also known as a concentric, center-line, or zero-offset butterfly valve.\u00a0 Its simple quarter-turn operation is the reason why it is mainly used in water treatment, power generation, and chemical processing [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":15690,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-15689","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-butterfly-valve"],"_links":{"self":[{"href":"https:\/\/www.xintaivalves.com\/fa\/wp-json\/wp\/v2\/posts\/15689","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xintaivalves.com\/fa\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xintaivalves.com\/fa\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fa\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fa\/wp-json\/wp\/v2\/comments?post=15689"}],"version-history":[{"count":2,"href":"https:\/\/www.xintaivalves.com\/fa\/wp-json\/wp\/v2\/posts\/15689\/revisions"}],"predecessor-version":[{"id":15695,"href":"https:\/\/www.xintaivalves.com\/fa\/wp-json\/wp\/v2\/posts\/15689\/revisions\/15695"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fa\/wp-json\/wp\/v2\/media\/15690"}],"wp:attachment":[{"href":"https:\/\/www.xintaivalves.com\/fa\/wp-json\/wp\/v2\/media?parent=15689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fa\/wp-json\/wp\/v2\/categories?post=15689"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xintaivalves.com\/fa\/wp-json\/wp\/v2\/tags?post=15689"}],"curies":[{"name":"\u0648\u0631\u062f\u067e\u0631\u0633","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}