{"id":611,"date":"2026-09-16T06:59:18","date_gmt":"2026-09-16T06:59:18","guid":{"rendered":"https:\/\/wdlvalve.com\/product\/duplex-gate-valves\/"},"modified":"2026-09-18T03:15:41","modified_gmt":"2026-09-18T03:15:41","slug":"%e5%8f%8c%e7%9b%b8%e4%b8%8d%e9%94%88%e9%92%a2%e9%97%b8%e9%98%80","status":"publish","type":"product","link":"https:\/\/wdlvalve.com\/zh\/product\/%e5%8f%8c%e7%9b%b8%e4%b8%8d%e9%94%88%e9%92%a2%e9%97%b8%e9%98%80\/","title":{"rendered":"\u53cc\u5c42\u4e0d\u9508\u94a2\u95f8\u9600"},"content":{"rendered":"<article style=\"max-width: 1200px; margin: 0 auto; font-family: Arial,Helvetica,sans-serif; color: #222; line-height: 1.7;\">\n<h2 style=\"color: #123a5a; font-size: 28px; margin: 0 0 16px;\">Duplex Stainless Steel Gate Valve for Seawater and Chloride Service<\/h2>\n<p>WDL Valve duplex stainless steel gate valves are designed for reliable pipeline<br \/>\nisolation in corrosive, chloride-rich and demanding industrial environments.<br \/>\nThe valve provides full shut-off performance and is suitable for applications<br \/>\nwhere high mechanical strength and resistance to corrosion are required.<\/p>\n<p>Duplex stainless steel combines two metallurgical phases: ferritic stainless steel<br \/>\nand austenitic stainless steel. The ferritic phase improves yield strength,<br \/>\nintergranular corrosion resistance and chloride stress corrosion cracking<br \/>\nresistance. The austenitic phase contributes toughness, ductility and weldability.<\/p>\n<p>Compared with austenitic stainless steel grades offering similar corrosion<br \/>\nresistance, duplex stainless steel normally contains lower levels of nickel and<br \/>\nmolybdenum. This can provide a cost-efficient material option for large industrial<br \/>\nvalves and corrosion-resistant pipeline systems.<\/p>\n<h2 style=\"color: #123a5a; font-size: 26px; margin: 28px 0 16px;\">\u4e3b\u8981\u7279\u70b9<\/h2>\n<ul style=\"padding-left: 22px; margin-top: 0;\">\n<li>High mechanical strength for demanding industrial pipeline service.<\/li>\n<li>Improved resistance to chloride stress corrosion cracking.<\/li>\n<li>Good resistance to pitting and crevice corrosion in chloride-containing media.<\/li>\n<li>Suitable for seawater and desalination applications.<\/li>\n<li>Good toughness and weldability compared with fully ferritic stainless steel.<\/li>\n<li>Lower nickel content than many austenitic stainless steel grades.<\/li>\n<li>Reliable shut-off for process, utility and seawater pipelines.<\/li>\n<li>Suitable for manual or customized actuation arrangements according to project requirements.<\/li>\n<li>Available with customized materials, pressure ratings, dimensions and end connections.<\/li>\n<\/ul>\n<h2 style=\"color: #123a5a; font-size: 26px; margin: 28px 0 16px;\">Technical Overview<\/h2>\n<div style=\"width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; margin-bottom: 28px;\">\n<table style=\"width: 100%; min-width: 720px; border: 1px solid #111111!important; border-collapse: collapse; background: #ffffff;\" border=\"1\" rules=\"all\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<th style=\"width: 34%; padding: 11px; border: 1px solid #111111!important; background: #eaf3f8; text-align: left;\">\u9879\u76ee<\/th>\n<th style=\"padding: 11px; border: 1px solid #111111!important; background: #eaf3f8; text-align: left;\">\u63cf\u8ff0<\/th>\n<\/tr>\n<tr>\n<td style=\"padding: 11px; border: 1px solid #111111!important;\">\u4ea7\u54c1\u7c7b\u578b<\/td>\n<td style=\"padding: 11px; border: 1px solid #111111!important;\">\u53cc\u76f8\u4e0d\u9508\u94a2\u95f8\u9600<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 11px; border: 1px solid #111111!important;\">Primary Function<\/td>\n<td style=\"padding: 11px; border: 1px solid #111111!important;\">Pipeline isolation and full shut-off<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 11px; border: 1px solid #111111!important;\">Valve Material<\/td>\n<td style=\"padding: 11px; border: 1px solid #111111!important;\">Duplex stainless steel and project-specified duplex grades<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 11px; border: 1px solid #111111!important;\">Corrosion Performance<\/td>\n<td style=\"padding: 11px; border: 1px solid #111111!important;\">Resistance to chloride corrosion, pitting, crevice corrosion and chloride stress corrosion cracking<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 11px; border: 1px solid #111111!important;\">\u9002\u7528\u4ecb\u8d28<\/td>\n<td style=\"padding: 11px; border: 1px solid #111111!important;\">Seawater, brine, process water, oil, chemical fluids and other corrosive media subject to material selection<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 11px; border: 1px solid #111111!important;\">Customization<\/td>\n<td style=\"padding: 11px; border: 1px solid #111111!important;\">Custom pressure class, size, end connection, trim material and actuator configuration available<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 style=\"color: #123a5a; font-size: 26px; margin: 28px 0 16px;\">\u5178\u578b\u5e94\u7528<\/h2>\n<ul style=\"padding-left: 22px; margin-top: 0;\">\n<li>Oil refining systems<\/li>\n<li>Fertilizer production plants<\/li>\n<li>\u7eb8\u6d46\u4e0e\u9020\u7eb8\u52a0\u5de5<\/li>\n<li>Petrochemical engineering<\/li>\n<li>Heat exchanger and condenser systems<\/li>\n<li>Seawater desalination plants<\/li>\n<li>Brine and seawater pipelines<\/li>\n<li>Corrosive industrial water systems<\/li>\n<\/ul>\n<h2 style=\"color: #123a5a; font-size: 26px; margin: 28px 0 16px;\">Why Use Duplex Stainless Steel?<\/h2>\n<p>Duplex stainless steel is selected when a project requires a combination of<br \/>\ncorrosion resistance, strength and long-term mechanical reliability. Its higher<br \/>\nyield strength can support robust valve construction, while its austenitic and<br \/>\nferritic structure provides a balance of toughness, weldability and resistance to<br \/>\nchloride-related corrosion mechanisms.<\/p>\n<p>A duplex stainless steel gate valve is primarily used for isolation rather than<br \/>\ncontinuous throttling. For accurate flow regulation, a dedicated control valve<br \/>\nshould be selected according to the process conditions.<\/p>\n<h2 style=\"color: #123a5a; font-size: 26px; margin: 28px 0 16px;\">WDL Valve Supply Capability<\/h2>\n<p>WDL Valve supplies duplex stainless steel valves for standard and customized<br \/>\nindustrial applications. Product configuration can be developed according to<br \/>\noperating pressure, temperature, medium composition, chloride concentration,<br \/>\nvalve size, connection standard and project requirements.<\/p>\n<p style=\"padding: 16px 18px; border: 1px solid #1378ae; background: #eef6fa; margin-top: 28px;\">Final valve materials, pressure-temperature limits, dimensions and testing requirements shall be confirmed against the approved WDL Valve technical drawing and project datasheet.<\/p>\n<\/article>","protected":false},"excerpt":{"rendered":"<p>WDL Valve \u53cc\u76f8\u4e0d\u9508\u94a2\u95f8\u9600\u5177\u6709\u9ad8\u5f3a\u5ea6\u3001\u8010\u6c2f\u5316\u7269\u8150\u8680\u4ee5\u53ca\u53ef\u9760\u7684\u622a\u6b62\u6027\u80fd\uff0c\u9002\u7528\u4e8e\u6d77\u6c34\u6de1\u5316\u3001\u77f3\u5316\u3001\u70bc\u6cb9\u3001\u5316\u80a5\u4ee5\u53ca\u5236\u6d46\u9020\u7eb8\u7b49\u9886\u57df\u3002<\/p>","protected":false},"featured_media":610,"comment_status":"open","ping_status":"closed","template":"","meta":{"_kad_post_transparent":"default","_kad_post_title":"","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"product_brand":[],"product_cat":[35,32,31,44],"product_tag":[],"class_list":["post-611","product","type-product","status-publish","has-post-thumbnail","product_cat-gate-valves","product_cat-valve-materials","product_cat-valve-types","product_cat-duplex-steel-valves","first","instock","shipping-taxable","product-type-simple","entry","content-bg","loop-entry"],"_links":{"self":[{"href":"https:\/\/wdlvalve.com\/zh\/wp-json\/wp\/v2\/product\/611","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wdlvalve.com\/zh\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/wdlvalve.com\/zh\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/wdlvalve.com\/zh\/wp-json\/wp\/v2\/comments?post=611"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wdlvalve.com\/zh\/wp-json\/wp\/v2\/media\/610"}],"wp:attachment":[{"href":"https:\/\/wdlvalve.com\/zh\/wp-json\/wp\/v2\/media?parent=611"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/wdlvalve.com\/zh\/wp-json\/wp\/v2\/product_brand?post=611"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/wdlvalve.com\/zh\/wp-json\/wp\/v2\/product_cat?post=611"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/wdlvalve.com\/zh\/wp-json\/wp\/v2\/product_tag?post=611"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}