{"id":2231,"date":"2024-07-26T14:38:19","date_gmt":"2024-07-26T12:38:19","guid":{"rendered":"https:\/\/taitecnologie.it\/spheroidal-cast-iron-ball-check-valve-gjs-500-pn-10-16\/"},"modified":"2025-03-25T14:18:03","modified_gmt":"2025-03-25T13:18:03","slug":"spheroidal-cast-iron-ball-check-valve-gjs-500-pn-10-16","status":"publish","type":"post","link":"https:\/\/taitecnologie.it\/en\/spheroidal-cast-iron-ball-check-valve-gjs-500-pn-10-16\/","title":{"rendered":"SPHEROIDAL CAST IRON BALL CHECK VALVE GJS 500 PN 10-16"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"2231\" class=\"elementor elementor-2231\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2b8a11c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2b8a11c\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-895c4ac\" data-id=\"895c4ac\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e58b5d0 elementor-widget elementor-widget-heading\" data-id=\"e58b5d0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">VALVOLA DI RITEGNO A PALLA IN GHISA SFEROIDALE GJS 500 PN 10-16<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-8eaa5a5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8eaa5a5\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-9c048d3\" data-id=\"9c048d3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1707060 elementor-widget elementor-widget-heading\" data-id=\"1707060\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">ART. 106P<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-95c4063 elementor-widget elementor-widget-text-editor\" data-id=\"95c4063\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Valvola di ritegno a palla in ghisa sferoidale GJS 500, con viteria in acciaio inossidabile. La sfera interna \u00e8 realizzata in acciaio zincato o ghisa sferoidale (da DN 50 fino a DN 150 acciaio &#8211; da DN 200 a DN 300 ghisa GGG 40). La sfera \u00e8 interamente rivestita in elastomero NBR. Ha la funzione di impedire il riflusso di fluidi viscosi, densi e con materiali in sospensione. Si pu\u00f2 installare sia in posizione orizzontale che verticale, purch\u00e9 la direzione del fluido a valvola aperta avvenga nella direzione indicata dalla freccia. La tenuta viene realizzata tramite l\u2019azione della sfera gommata.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-51318da\" data-id=\"51318da\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-56cb212 elementor-widget elementor-widget-image\" data-id=\"56cb212\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"298\" height=\"259\" src=\"https:\/\/taitecnologie.it\/wp-content\/uploads\/VALVOLA-DI-RITEGNO-A-PALLA-IN-GHISA-SFEROIDALE-GJS-500-PN-10-16.jpg\" class=\"attachment-large size-large wp-image-1824\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-cd0ed59 elementor-widget elementor-widget-heading\" data-id=\"cd0ed59\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Campo di applicazione:<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-64cf49f elementor-widget elementor-widget-text-editor\" data-id=\"64cf49f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul>\n \t<li>tubazioni convoglianti acqua calda (NBR max. 70\u00b0C) e fredda, altri fluidi non aggressivi, solitamente installato per impianti fognari, anche per acqua potabile, in accordo al D.M. 174 del 2004 (pressione minima di utilizzo minimo 2 bar \/ vedi report di prova scaricabile da www.taitecnologie.it).<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0a210f4 elementor-widget elementor-widget-heading\" data-id=\"0a210f4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Caratteristiche Tecniche<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-55c3147 elementor-widget elementor-widget-text-editor\" data-id=\"55c3147\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul>\n<li>Riferimento normativo per gli impianti fognari: EN 12050-4<\/li>\n<li>Riferimento normativo del prodotto: UNI EN 1074-3 &#8211; UNI EN 1092-2<\/li>\n<li>Massima pressione esercizio: PN16<\/li>\n<li>Scartamento secondo UNI EN 558 + A1<\/li>\n<li>Testate secondo norma UNI EN 12266-1<\/li>\n<li>Verniciatura: RAL5005 epossidica spessore medio 250 \u03bc<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fba8814 elementor-widget elementor-widget-image\" data-id=\"fba8814\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"591\" height=\"215\" src=\"https:\/\/taitecnologie.it\/wp-content\/uploads\/VALVOLA-DI-RITEGNO-A-PALLA-IN-GHISA-SFEROIDALE-GJS-500-PN-10-16-TAB-1.jpg\" class=\"attachment-large size-large wp-image-1828\" alt=\"\" srcset=\"https:\/\/taitecnologie.it\/wp-content\/uploads\/VALVOLA-DI-RITEGNO-A-PALLA-IN-GHISA-SFEROIDALE-GJS-500-PN-10-16-TAB-1.jpg 591w, https:\/\/taitecnologie.it\/wp-content\/uploads\/VALVOLA-DI-RITEGNO-A-PALLA-IN-GHISA-SFEROIDALE-GJS-500-PN-10-16-TAB-1-300x109.jpg 300w\" sizes=\"(max-width: 591px) 100vw, 591px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0b3ecf4 elementor-widget elementor-widget-image\" data-id=\"0b3ecf4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"483\" height=\"337\" src=\"https:\/\/taitecnologie.it\/wp-content\/uploads\/VALVOLA-DI-RITEGNO-A-PALLA-IN-GHISA-SFEROIDALE-GJS-500-PN-10-16-TAB-2.jpg\" class=\"attachment-large size-large wp-image-1830\" alt=\"\" srcset=\"https:\/\/taitecnologie.it\/wp-content\/uploads\/VALVOLA-DI-RITEGNO-A-PALLA-IN-GHISA-SFEROIDALE-GJS-500-PN-10-16-TAB-2.jpg 483w, https:\/\/taitecnologie.it\/wp-content\/uploads\/VALVOLA-DI-RITEGNO-A-PALLA-IN-GHISA-SFEROIDALE-GJS-500-PN-10-16-TAB-2-300x209.jpg 300w\" sizes=\"(max-width: 483px) 100vw, 483px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2db085b elementor-align-center elementor-widget elementor-widget-button\" data-id=\"2db085b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/taitecnologie.it\/wp-content\/uploads\/106P_scheda-tecnica-ped-rev-1-7-24.pdf\" id=\" \">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"far fa-file-pdf\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Scarica la Scheda Tecnica<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-70ed18a\" data-id=\"70ed18a\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f8688b4 elementor-widget elementor-widget-image\" data-id=\"f8688b4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"350\" height=\"200\" src=\"https:\/\/taitecnologie.it\/wp-content\/uploads\/TAI-BIG.jpg\" class=\"attachment-full size-full wp-image-1619\" alt=\"\" srcset=\"https:\/\/taitecnologie.it\/wp-content\/uploads\/TAI-BIG.jpg 350w, https:\/\/taitecnologie.it\/wp-content\/uploads\/TAI-BIG-300x171.jpg 300w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-346b407 elementor-widget elementor-widget-global elementor-global-1968 elementor-widget-text-editor\" data-id=\"346b407\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>T.A.I. Tecnologie antincendio e idrauliche s.r.l. unipersonale<\/strong><\/p><p>Via Monte Fenera, 72\/A<br \/>13018 Valduggia (VC) &#8211; Italia<br \/>Tel. 0163.48257<br \/>Fax. 0163.438442<br \/>E-mail <a class=\"link-white\" href=\"mailto:info@taitecnologie.it\">info@taitecnologie.it<\/a><\/p><p><strong>International Sales Office<\/strong><br \/>Tel: <a class=\"link-white\" href=\"callto:+390237920277\">(+39) 0237920277<\/a><br \/>Email: <a class=\"link-white\" href=\"mailto:sales@taitecnologie.it\">sales@taitecnologie.it<\/a><br \/>P.IVA 01922820020<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-11cadf5 elementor-search-form--skin-minimal elementor-widget elementor-widget-search-form\" data-id=\"11cadf5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;skin&quot;:&quot;minimal&quot;}\" data-widget_type=\"search-form.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<search role=\"search\">\n\t\t\t<form class=\"elementor-search-form\" action=\"https:\/\/taitecnologie.it\/en\/\" method=\"get\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-search-form__container\">\n\t\t\t\t\t<label class=\"elementor-screen-only\" for=\"elementor-search-form-11cadf5\">Search<\/label>\n\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-search-form__icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-search\"><\/i>\t\t\t\t\t\t\t<span class=\"elementor-screen-only\">Search<\/span>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\n\t\t\t\t\t<input id=\"elementor-search-form-11cadf5\" placeholder=\"Cerca...\" class=\"elementor-search-form__input\" type=\"search\" name=\"s\" value=\"\">\n\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/form>\n\t\t<\/search>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fbbed15 elementor-widget elementor-widget-sitemap\" data-id=\"fbbed15\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"sitemap.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-sitemap-wrap\"><div class=\"elementor-sitemap-section\"><p class=\"elementor-sitemap-title elementor-sitemap-category-title\">Categorie<\/p><ul class=\"elementor-sitemap-list elementor-sitemap-category-list\">\t<li class=\"elementor-sitemap-item elementor-sitemap-item-category cat-item cat-item-49\"><a href=\"https:\/\/taitecnologie.it\/en\/category\/water-line-en\/\">Water Line<\/a>\n<\/li>\n\t<li class=\"elementor-sitemap-item elementor-sitemap-item-category cat-item cat-item-60\"><a href=\"https:\/\/taitecnologie.it\/en\/category\/malleable-cast-iron-fittings\/\">Malleable Cast Iron Fittings<\/a>\n<\/li>\n\t<li class=\"elementor-sitemap-item elementor-sitemap-item-category cat-item cat-item-50\"><a href=\"https:\/\/taitecnologie.it\/en\/category\/industrial-valves\/\">Industrial Valves<\/a>\n<\/li>\n\t<li class=\"elementor-sitemap-item elementor-sitemap-item-category cat-item cat-item-55\"><a href=\"https:\/\/taitecnologie.it\/en\/category\/galvanised-barrels\/\">Galvanised Barrels<\/a>\n<\/li>\n\t<li class=\"elementor-sitemap-item elementor-sitemap-item-category cat-item cat-item-52\"><a href=\"https:\/\/taitecnologie.it\/en\/category\/fittings-en\/\">Fittings<\/a>\n<\/li>\n\t<li class=\"elementor-sitemap-item elementor-sitemap-item-category cat-item cat-item-53\"><a href=\"https:\/\/taitecnologie.it\/en\/category\/black-ankle-boots\/\">Black ankle boots<\/a>\n<\/li>\n\t<li class=\"elementor-sitemap-item elementor-sitemap-item-category cat-item cat-item-51\"><a href=\"https:\/\/taitecnologie.it\/en\/category\/anti-vibration-elastic-joints\/\">Anti-vibration elastic joints<\/a>\n<\/li>\n\t<li class=\"elementor-sitemap-item elementor-sitemap-item-category cat-item cat-item-54\"><a href=\"https:\/\/taitecnologie.it\/en\/category\/all-thread-nipples\/\">All-Thread Nipples<\/a>\n<\/li>\n\t<li class=\"elementor-sitemap-item elementor-sitemap-item-category cat-item cat-item-65\"><a href=\"https:\/\/taitecnologie.it\/en\/category\/accessories-water-systems\/\">Accessories Water Systems<\/a>\n<\/li>\n<\/ul><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7927cf2 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"7927cf2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/taitecnologie.it\/dove-siamo\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">CONTATTACI<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5cb425b elementor-widget elementor-widget-image\" data-id=\"5cb425b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"78\" src=\"https:\/\/taitecnologie.it\/wp-content\/uploads\/bocciolone.gif\" class=\"attachment-large size-large wp-image-1332\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-80dce34 elementor-widget elementor-widget-text-editor\" data-id=\"80dce34\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Per materiale antincendio consultate il <strong>Catalogo antincendio di Bocciolone Antincendio spa<\/strong> azienda partner<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>SPHEROIDAL CAST IRON BALL CHECK VALVE GJS 500 PN 10-16 ART. 106P A ball check valve made of spheroidal cast iron GJS 500, with stainless steel screws. The inner ball is made of galvanised steel or spheroidal cast iron (DN 50 to DN 150 steel &#8211; DN 200 to DN 300 cast iron GGG 40). [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":2232,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[50,49],"tags":[66],"class_list":["post-2231","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industrial-valves","category-water-line-en","tag-inglese"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SPHEROIDAL CAST IRON BALL CHECK VALVE GJS 500 PN 10-16 - T.A.I<\/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:\/\/taitecnologie.it\/spheroidal-cast-iron-ball-check-valve-gjs-500-pn-10-16\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SPHEROIDAL CAST IRON BALL CHECK VALVE GJS 500 PN 10-16 - T.A.I\" \/>\n<meta property=\"og:description\" content=\"SPHEROIDAL CAST IRON BALL CHECK VALVE GJS 500 PN 10-16 ART. 106P A ball check valve made of spheroidal cast iron GJS 500, with stainless steel screws. The inner ball is made of galvanised steel or spheroidal cast iron (DN 50 to DN 150 steel &#8211; DN 200 to DN 300 cast iron GGG 40). 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