{"id":69663,"date":"2026-05-17T17:27:29","date_gmt":"2026-05-17T17:27:29","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/api-st-608\/"},"modified":"2026-05-19T15:30:18","modified_gmt":"2026-05-19T15:30:18","slug":"api-st-608","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/api-st-608\/","title":{"rendered":"API St 608"},"content":{"rendered":"<h2>Technical standards and scope of API 608<\/h2>\n<p>The international standard API 608 regulates the design and operational requirements for metal ball valves intended for integration into systems for transporting oil, petroleum products, and corrosive industrial media. EV Group China provides supply of shut-off valves that fully comply with these regulatory criteria.<\/p>\n<ul>\n<li>Flanged ends: DN 15 \u2013 DN 600 (NPS 1\/2 \u2013 NPS 24).<\/li>\n<li>Butt-welding: DN 15 \u2013 DN 600 (NPS 1\/2 \u2013 NPS 24).<\/li>\n<li>Socket-welding: DN 8 \u2013 DN 50 (NPS 1\/4 \u2013 NPS 2).<\/li>\n<li>Threaded ends: DN 8 \u2013 DN 50 (NPS 1\/4 \u2013 NPS 2).<\/li>\n<\/ul>\n<p>The geometric parameters of the products are strictly aligned with the nominal pipeline dimensions according to the ASME B36.10M standard.<\/p>\n<h2>Classification by nominal pressure<\/h2>\n<p>EV Group China supplies ball valves designed for operation in the following pressure ranges:<\/p>\n<ul>\n<li>Flanged and butt-welded design: classes 150, 300, 600.<\/li>\n<li>Socket-welded and threaded connections: classes 150, 300, 600, 800.<\/li>\n<\/ul>\n<h2>Design features and port configurations<\/h2>\n<p>The standard defines requirements for port configurations, ensuring optimal hydraulic characteristics:<\/p>\n<ul>\n<li>Full port design.<\/li>\n<li>Standard reduced port.<\/li>\n<li>Double (two-stage) reduced port.<\/li>\n<\/ul>\n<p>Technical specifications cover both floating ball and trunnion-mounted ball designs. The examples provided in industry diagrams (see Fig. B.1 and B.2) serve as a basic nomenclature of assemblies and do not limit the variety of engineering solutions for specific industrial tasks.<\/p>\n<p><img decoding=\"async\" src=\"\/image\/catalog\/wiki\/flange\/b1.png\" alt=\"Floating ball valve diagram\" title=\"Floating ball design\"><br \/>\n<img decoding=\"async\" src=\"\/image\/catalog\/wiki\/flange\/b2.png\" alt=\"Trunnion-mounted ball valve diagram\" title=\"Trunnion ball design\"><\/p>\n<p>The products offered by EV Group China complement the requirements of the ASME B16.34 standard, ensuring increased reliability and tightness of shut-off valves under critical operating conditions.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[111],"class_list":["post-69663","wiki","type-wiki","status-publish","hentry","wiki_category-api"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69663","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69663\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69663"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69663"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}