{"id":44342,"date":"2026-09-30T03:55:48","date_gmt":"2026-09-30T03:55:48","guid":{"rendered":"https:\/\/valve-atlas.com\/api-600-cast-steel-gate-valves\/pressure-seal-gate-valve\/"},"modified":"2026-09-30T03:55:48","modified_gmt":"2026-09-30T03:55:48","slug":"pressure-seal-gate-valve","status":"publish","type":"page","link":"https:\/\/valve-atlas.com\/fr_ca\/api-600-cast-steel-gate-valves\/pressure-seal-gate-valve\/","title":{"rendered":"Pressure Seal Gate Valve: Class 900\u20132500"},"content":{"rendered":"<div class=\"vx-page\"><section class=\"vx-intro vx-intro-has-media\"><div class=\"vx-intro-text\"><nav class=\"vx-crumbs\" aria-label=\"chapelure\"><a href=\"\/\">Accueil<\/a><i>\/<\/i><a href=\"\/industrial-valves\/\">Vannes industrielles<\/a><i>\/<\/i><a href=\"\/api-600-cast-steel-gate-valves\/\">Vannes \u00e0 guillotine et \u00e0 soupape en acier moul\u00e9<\/a><i>\/<\/i><span>Vanne \u00e0 guillotine \u00e0 joint d&#039;\u00e9tanch\u00e9it\u00e9 sous pression<\/span><\/nav><p class=\"vx-eyebrow\">Vannes \u00e0 guillotine et \u00e0 soupape en acier moul\u00e9<\/p><div class=\"vx-lead\"><p>In a pressure seal gate valve, the bonnet seal is designed to tighten as internal pressure rises. At high pressure and temperature this gives more reliable sealing than a bolted bonnet, together with a more compact and lighter body.<\/p><\/div><div class=\"vx-chips\"><span>Joint d&#039;\u00e9tanch\u00e9it\u00e9<\/span><span>ASME B16.34<\/span><span>Class 900\u20132500<\/span><span>WC6 \/ WC9 \/ C12A<\/span><\/div><div class=\"vx-actions\"><a class=\"vx-btn\" href=\"\/contact\/\">Demander un devis<\/a><a class=\"vx-btn vx-btn-line\" href=\"\/wp-content\/uploads\/2026\/09\/valveatlas-datasheet-pressure-seal-gate-valve.pdf\" target=\"_blank\" rel=\"noopener\">T\u00e9l\u00e9charger la fiche technique (PDF)<\/a><\/div><\/div><figure class=\"vx-intro-media vx-intro-ph\"><div><b>Joint d&#039;\u00e9tanch\u00e9it\u00e9<\/b><span>Vanne \u00e0 guillotine \u00e0 joint d&#039;\u00e9tanch\u00e9it\u00e9 sous pression<\/span><\/div><\/figure><\/section>\n<h2 class=\"vx-h2\">Aper\u00e7u<\/h2><p>Pressure seal gate valves are used in Class 900, 1500 and 2500 on high-pressure steam, boiler feedwater and power plant main and auxiliary lines. Chromium-molybdenum cast steels (WC6, WC9, C12A) are preferred for high-temperature strength; for material designations, see our <a href=\"\/2026\/07\/25\/how-to-read-valve-codes-wcb-cf8m-trim\/\">guide to reading valve material codes<\/a>.<\/p>\n<h2 class=\"vx-h2\">Sp\u00e9cifications techniques<\/h2><div class=\"vx-table-wrap\"><table class=\"vx-table vx-spec\"><tbody><tr><th scope=\"row\">classe de pression<\/th><td>ASME Class 900, 1500, 2500<\/td><\/tr><tr><th scope=\"row\">Connexions terminales<\/th><td>Mainly butt-weld (BW); RTJ flanged option<\/td><\/tr><tr><th scope=\"row\">Mat\u00e9riels<\/th><td>WCB, WC6, WC9, C12A; F22 \/ F91 (forged)<\/td><\/tr><tr><th scope=\"row\">Garniture<\/th><td>Hard-faced (Stellite) seats and wedge<\/td><\/tr><tr><th scope=\"row\">Op\u00e9ration<\/th><td>Gear operator, multi-turn electric actuator; bypass and drain options<\/td><\/tr><\/tbody><\/table><\/div>\n<h2 class=\"vx-h2\">Caract\u00e9ristiques principales<\/h2><ul class=\"vx-check\"><li>Bonnet seal that tightens with pressure<\/li><li>Cr-Mo materials for high temperature<\/li><li>Optional bypass line and warm-up connection<\/li><li>Butt-weld ends suited to power plant and boiler lines<\/li><\/ul>\n<h2 class=\"vx-h2\">Catalog data<\/h2><ul class=\"vx-check\"><li><strong>Application:<\/strong> on Class 900, 1500 and 2500 gate valves, the body-bonnet joint is usually a pressure seal design; in Class 150\u2013600, a bolted bonnet is standard.<\/li><li><strong>Sealing:<\/strong> as internal pressure rises, the bonnet seal is compressed harder; at high pressure and temperature the joint is more reliable and more compact than a bolted flange connection.<\/li><li><strong>Materials:<\/strong> A216 WCB, A217 WC6, WC9, C12A and A351 CF8M; trim 5, 8 or 12 (hardfaced).<\/li><li><strong>Face-to-face:<\/strong> ASME B16.10; butt-weld (BW) ends are the most common option on power plant steam lines.<\/li><\/ul><h2 class=\"vx-h2\">Trim options (API 600)<\/h2><p>Trim is the material combination of the internal parts in contact with the fluid: wedge (or disc), seat and stem. Stating the trim number in the inquiry and the order defines the internal materials in a single line:<\/p><div class=\"vx-table-wrap\"><table class=\"vx-table\"><thead><tr><th scope=\"col\">Trim no.<\/th><th scope=\"col\">Wedge \/ disc face<\/th><th scope=\"col\">Seat face<\/th><th scope=\"col\">Tige<\/th><th scope=\"col\">Service typique<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>13Cr<\/td><td>13Cr<\/td><td>13Cr (F6a)<\/td><td>Water, air, general service<\/td><\/tr><tr><td>2<\/td><td>304 (18Cr-8Ni)<\/td><td>304<\/td><td>304<\/td><td>Mildly corrosive service<\/td><\/tr><tr><td>5<\/td><td>CoCr hardfacing (Stellite)<\/td><td>CoCr hardfacing<\/td><td>13Cr<\/td><td>High temperature, steam, erosive fluids<\/td><\/tr><tr><td>8<\/td><td>13Cr<\/td><td>CoCr hardfacing<\/td><td>13Cr<\/td><td>Hydrocarbons and steam; the most common trim for carbon steel valves<\/td><\/tr><tr><td>10<\/td><td>316 (18Cr-8Ni-Mo)<\/td><td>316<\/td><td>316<\/td><td>Corrosive service<\/td><\/tr><tr><td>12<\/td><td>316<\/td><td>CoCr hardfacing<\/td><td>316<\/td><td>Corrosive and erosive service<\/td><\/tr><tr><td>13<\/td><td>Alloy 20 (19Cr-29Ni)<\/td><td>Alliage 20<\/td><td>Alliage 20<\/td><td>Sulfuric acid and similar aggressive media<\/td><\/tr><tr><td>16<\/td><td>CoCr hardfacing<\/td><td>CoCr hardfacing<\/td><td>316<\/td><td>Severe corrosive and erosive service<\/td><\/tr><\/tbody><\/table><\/div><p class=\"vx-note\">The table lists the most common trims. For the full API 600 trim table (1\u201318) or special trims, send us your specification.<\/p>\n<h2 class=\"vx-h2\">Documentation et tests<\/h2><p>Dans le cadre de projets industriels, la documentation technique est aussi importante que la vanne elle-m\u00eame. Nous confirmons la certification et le p\u00e9rim\u00e8tre des tests pour chaque \u00e9l\u00e9ment d\u00e8s l&#039;\u00e9tablissement du devis.<\/p><ul class=\"vx-check\"><li><strong>EN 10204 3.1 certificats de mat\u00e9riaux<\/strong> pour les pi\u00e8ces sous pression et en contact avec le fluide, tra\u00e7abilit\u00e9 par num\u00e9ro de coul\u00e9e<\/li><li><strong>EN 10204 3.2<\/strong> avec inspection par un tiers, sur demande<\/li><li><strong>Rapports d&#039;essais de pression<\/strong> essais de coque, de si\u00e8ge et, le cas \u00e9ch\u00e9ant, de gaz, conformes aux normes API 598 ou EN 12266-1<\/li><li><strong>Certificats d&#039;essai au feu<\/strong> (API 607 \/ ISO 10497) pour les conceptions test\u00e9es en mati\u00e8re de r\u00e9sistance au feu<\/li><li><strong>Rapports PMI<\/strong> pour les mat\u00e9riaux en alliage et en acier inoxydable<\/li><li><strong>Rapports d&#039;inspection dimensionnelle, visuelle et de rev\u00eatement<\/strong><\/li><li><strong>D\u00e9claration CE PDSE 2014\/68\/UE<\/strong> pour les \u00e9quipements relevant de son champ d&#039;application<\/li><li><strong>D\u00e9claration de conformit\u00e9 NACE MR0175 \/ ISO 15156<\/strong> pour service acide (H\u2082S)<\/li><\/ul>\n<h2 class=\"vx-h2\">Fiche technique<\/h2><ul class=\"vx-dl-list\"><li><a href=\"\/wp-content\/uploads\/2026\/09\/valveatlas-datasheet-pressure-seal-gate-valve.pdf\" target=\"_blank\" rel=\"noopener\"><span class=\"vx-pdf\">PDF<\/span><span class=\"vx-dl-t\">Pressure Seal Gate Valve: technical datasheet<\/span><span class=\"vx-dl-m\">PDF \u00b7 Anglais \u00b7 2\u20133 pages<\/span><\/a><\/li><\/ul>\n<section class=\"vx-faq\"><h2 class=\"vx-h2\">Foire aux questions<\/h2><details class=\"vx-faq-item\"><summary>What is the advantage of a pressure seal valve?<\/summary><div class=\"vx-faq-a\"><p>Internal pressure compresses the bonnet seal, so sealing improves as pressure rises. Because no large bolted flange is needed, the body is more compact and lighter in high classes.<\/p><\/div><\/details><details class=\"vx-faq-item\"><summary>Why is a bypass used on large high-pressure valves?<\/summary><div class=\"vx-faq-a\"><p>To equalize the pressure difference across the closed valve before opening and to warm up the line in a controlled way. This reduces opening torque and seat wear and prevents thermal shock.<\/p><\/div><\/details><\/section>\n<h2 class=\"vx-h2\">Produits associ\u00e9s<\/h2><div class=\"vx-grid\"><a class=\"vx-card vx-card-media\" href=\"\/api-600-cast-steel-gate-valves\/api-600-gate-valve\/\"><div class=\"vx-card-img\"><img class=\"vx-thumb wp-image-44264 lazyload\" data-src=\"\/wp-content\/uploads\/2026\/09\/api-600-cast-steel-gate-valve-768x576.jpg\" data-srcset=\"\/wp-content\/uploads\/2026\/09\/api-600-cast-steel-gate-valve-300x225.jpg 300w, \/wp-content\/uploads\/2026\/09\/api-600-cast-steel-gate-valve-768x576.jpg 768w, \/wp-content\/uploads\/2026\/09\/api-600-cast-steel-gate-valve-1024x768.jpg 1024w, \/wp-content\/uploads\/2026\/09\/api-600-cast-steel-gate-valve.jpg 1200w\" data-sizes=\"auto, (max-width: 700px) 100vw, 380px\" width=\"1200\" height=\"900\" alt=\"API 600 flanged cast steel gate valve\" decoding=\"async\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1200px; --smush-placeholder-aspect-ratio: 1200\/900;\"><\/div><div class=\"vx-card-body\"><h3>Vanne \u00e0 guillotine en acier moul\u00e9 API 600<\/h3><p>2\u2033\u201342\u2033, Classe 150\u2013900; OS&amp;Y, coin flexible, options de garniture API.<\/p><span class=\"vx-more\">Voir les d\u00e9tails<\/span><\/div><\/a><a class=\"vx-card vx-card-media\" href=\"\/api-600-cast-steel-gate-valves\/api-6d-slab-gate-valve\/\"><div class=\"vx-card-img\"><img class=\"vx-thumb wp-image-44265 lazyload\" data-src=\"\/wp-content\/uploads\/2026\/09\/api-6d-slab-gate-valves-768x576.jpg\" data-srcset=\"\/wp-content\/uploads\/2026\/09\/api-6d-slab-gate-valves-300x225.jpg 300w, \/wp-content\/uploads\/2026\/09\/api-6d-slab-gate-valves-768x576.jpg 768w, \/wp-content\/uploads\/2026\/09\/api-6d-slab-gate-valves-1024x768.jpg 1024w, \/wp-content\/uploads\/2026\/09\/api-6d-slab-gate-valves.jpg 1200w\" data-sizes=\"auto, (max-width: 700px) 100vw, 380px\" width=\"1200\" height=\"900\" alt=\"API 6D slab gate valves\" decoding=\"async\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1200px; --smush-placeholder-aspect-ratio: 1200\/900;\"><\/div><div class=\"vx-card-body\"><h3>Vanne \u00e0 guillotine API 6D<\/h3><p>Passage int\u00e9gral adapt\u00e9 au raclage ; service de pipelines et de stations.<\/p><span class=\"vx-more\">Voir les d\u00e9tails<\/span><\/div><\/a><a class=\"vx-card vx-card-media\" href=\"\/api-600-cast-steel-gate-valves\/bs-1873-globe-valve\/\"><div class=\"vx-card-img\"><img class=\"vx-thumb wp-image-44267 lazyload\" data-src=\"\/wp-content\/uploads\/2026\/09\/cast-steel-globe-valves-768x576.jpg\" data-srcset=\"\/wp-content\/uploads\/2026\/09\/cast-steel-globe-valves-300x225.jpg 300w, \/wp-content\/uploads\/2026\/09\/cast-steel-globe-valves-768x576.jpg 768w, \/wp-content\/uploads\/2026\/09\/cast-steel-globe-valves-1024x768.jpg 1024w, \/wp-content\/uploads\/2026\/09\/cast-steel-globe-valves.jpg 1200w\" data-sizes=\"auto, (max-width: 700px) 100vw, 380px\" width=\"1200\" height=\"900\" alt=\"Cast steel globe valves\" decoding=\"async\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1200px; --smush-placeholder-aspect-ratio: 1200\/900;\"><\/div><div class=\"vx-card-body\"><h3>Vanne \u00e0 globe en acier moul\u00e9 BS 1873<\/h3><p>Capot boulonn\u00e9 et joint d&#039;\u00e9tanch\u00e9it\u00e9 sous pression ; disque plat ou bouchon, si\u00e8ge arri\u00e8re, garniture Stellite.<\/p><span class=\"vx-more\">Voir les d\u00e9tails<\/span><\/div><\/a><\/div>\n<section class=\"vx-cta\"><div><h2>Request a quote: Pressure Seal Gate Valve<\/h2><p>Partagez votre liste de vannes, votre fiche technique ou le cahier des charges de votre projet. Nous examinons les normes, les mat\u00e9riaux et la documentation ligne par ligne et vous soumettons une offre d\u00e9taill\u00e9e, toute d\u00e9rogation au cahier des charges \u00e9tant mentionn\u00e9e par \u00e9crit.<\/p><\/div><div class=\"vx-cta-actions\"><a class=\"vx-btn\" href=\"\/contact\/\">Demander un devis<\/a><a class=\"vx-cta-link\" href=\"mailto:info@valve-atlas.com\">info@valve-atlas.com<\/a><a class=\"vx-cta-link\" href=\"tel:+16475537109\">+1 (647) 553-7109<\/a><\/div><\/section><\/div>","protected":false},"excerpt":{"rendered":"<p>Home\/Industrial Valves\/Cast Steel Gate &amp; Globe Valves\/Pressure Seal Gate Valve Cast Steel Gate &amp; Globe Valves In a pressure seal gate valve, the bonnet seal is designed to tighten as internal pressure rises. At high pressure and temperature this gives more reliable sealing than a bolted bonnet, together with a more compact and lighter body.&hellip;<\/p>","protected":false},"author":1,"featured_media":0,"parent":44051,"menu_order":6,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"iawp_total_views":2,"footnotes":""},"class_list":["post-44342","page","type-page","status-publish","hentry","description-off"],"acf":[],"_links":{"self":[{"href":"https:\/\/valve-atlas.com\/fr_ca\/wp-json\/wp\/v2\/pages\/44342","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/valve-atlas.com\/fr_ca\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/valve-atlas.com\/fr_ca\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/valve-atlas.com\/fr_ca\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/valve-atlas.com\/fr_ca\/wp-json\/wp\/v2\/comments?post=44342"}],"version-history":[{"count":0,"href":"https:\/\/valve-atlas.com\/fr_ca\/wp-json\/wp\/v2\/pages\/44342\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/valve-atlas.com\/fr_ca\/wp-json\/wp\/v2\/pages\/44051"}],"wp:attachment":[{"href":"https:\/\/valve-atlas.com\/fr_ca\/wp-json\/wp\/v2\/media?parent=44342"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}