{"id":5733,"date":"2021-03-06T13:00:13","date_gmt":"2021-03-06T13:00:13","guid":{"rendered":"https:\/\/www.stvvalves.com\/?p=5733"},"modified":"2021-03-06T13:44:44","modified_gmt":"2021-03-06T13:44:44","slug":"gate-valve-materials","status":"publish","type":"post","link":"https:\/\/www.stvvalves.com\/it\/gate-valve-materials\/","title":{"rendered":"Come selezionare i materiali della valvola a saracinesca"},"content":{"rendered":"<div class=\"portlet-body\">\n<div class=\"journal-content-article\">\n<p>La scelta del materiale della valvola a saracinesca dipende principalmente dal mezzo fluido e dall&#039;ambiente di lavoro. A seconda del diverso mezzo e ambiente, anche la selezione del materiale \u00e8 diversa. In generale, la selezione del materiale della valvola \u00e8 divisa in tre aspetti; la superficie di tenuta del disco della valvola, in cui il corpo della valvola \u00e8 generalmente realizzato in acciaio al carbonio, ghisa (ghisa grigia, ghisa duttile), acciaio inossidabile (304 316) e la piastra della valvola \u00e8 in acciaio al carbonio, acciaio inossidabile (304 316), doppia fase acciaio (2507 316) Generalmente, la superficie di tenuta del rivestimento in nylon del rivestimento in fluoro ha: NBR EPDM PDEF ppl. I clienti possono scegliere il materiale corrispondente in base alle loro effettive esigenze. Si prega di contattare il nostro personale di vendita e non vediamo l&#039;ora di collaborare con voi.<\/p>\n<\/div>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 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\">Table of Contents<\/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=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/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' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.stvvalves.com\/it\/gate-valve-materials\/#BODY\" >CORPO<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.stvvalves.com\/it\/gate-valve-materials\/#TRIM\" >ORDINARE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.stvvalves.com\/it\/gate-valve-materials\/#MATERIAL_SELECTION\" >SELEZIONE DEI MATERIALI<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"BODY\"><\/span>CORPO<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"journal-content-article\">\n<div>Il corpo di<a href=\"https:\/\/www.youtube.com\/watch?v=C5ZMLWujKGs\" target=\"_blank\" rel=\"noopener\"> saracinesche<\/a>\u00a0<strong>inferiore a 2 pollici<\/strong>\u00a0\u00e8 generalmente composto\u00a0<a href=\"https:\/\/www.stvvalves.com\/it\/wholesale\/gate-valve\/forged-steel-gate-valve\/\">acciaio forgiato<\/a>\u00a0(i gradi di materiale del corpo pi\u00f9 comuni sono ASTM A105 per servizio ad alta temperatura, ASTM A350 per servizio a bassa temperatura e ASTM A182 F304\/F316 per servizio corrosivo).<\/div>\n<div><\/div>\n<div>I corpi delle valvole a saracinesca di diametro interno\u00a0<strong>superiore a 2 pollici<\/strong>\u00a0sono, invece, realizzate in acciaio fuso (i principali gradi fusi sono ASTM A216 WCB per servizio ad alta temperatura, ASTM A351 per condizioni di bassa temperatura e ASTM A351 CF8 e CF8M \u2013 ovvero valvole a saracinesca in acciaio inossidabile 304 e 316).<\/div>\n<div><\/div>\n<div>\n<div class=\"row-fluid\">\n<h3><span class=\"ez-toc-section\" id=\"TRIM\"><\/span>ORDINARE<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Le parti rimovibili e sostituibili della valvola sono collettivamente definite \u201ctrim\u201d (per una valvola a saracinesca: sede, disco, sede posteriore e stelo).<br \/>\nLa specifica API 600 prevede una serie di combinazioni di finiture standard, come illustrato di seguito<\/p>\n<table width=\"752\">\n<tbody>\n<tr>\n<th>API TRIM #<\/th>\n<th>MATERIALE DI BASE<\/th>\n<th>MATERIALE PER SEDILE<\/th>\n<th>MATERIALE PER DISCO<\/th>\n<th>SEDILE POSTERIORE<br \/>\nMATERIALE<\/th>\n<th>MATERIALE PER STELO<\/th>\n<\/tr>\n<tr>\n<th>1<\/th>\n<td>410<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<\/tr>\n<tr>\n<th>2<\/th>\n<td>304<\/td>\n<td>304<\/td>\n<td>304<\/td>\n<td>304<\/td>\n<td>304<\/td>\n<\/tr>\n<tr>\n<th>3<\/th>\n<td>F310<\/td>\n<td>310<\/td>\n<td>310<\/td>\n<td>310<\/td>\n<td>310<\/td>\n<\/tr>\n<tr>\n<th>4<\/th>\n<td>Difficile 410<\/td>\n<td>Difficile 410<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<\/tr>\n<tr>\n<th>5<\/th>\n<td>Duro<\/td>\n<td>Stellite<\/td>\n<td>Stellite<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<\/tr>\n<tr>\n<th>5A<\/th>\n<td>Duro<\/td>\n<td>Ni-Cr<\/td>\n<td>Ni-Cr<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<\/tr>\n<tr>\n<th>6<\/th>\n<td>410 e Cu-Ni<\/td>\n<td>Cu-Ni<\/td>\n<td>Cu-Ni<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<\/tr>\n<tr>\n<th>7<\/th>\n<td>410 e Duro 410<\/td>\n<td>Difficile 410<\/td>\n<td>Difficile 410<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<\/tr>\n<tr>\n<th>8<\/th>\n<td>410 e Hardface<\/td>\n<td>Stellite<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<\/tr>\n<tr>\n<th>8A<\/th>\n<td>410 e Hardface<\/td>\n<td>Ni-Cr<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<td>410<\/td>\n<\/tr>\n<tr>\n<th>9<\/th>\n<td>Monel<\/td>\n<td>Monel<\/td>\n<td>Monel<\/td>\n<td>Monel<\/td>\n<td>Monel<\/td>\n<\/tr>\n<tr>\n<th>10<\/th>\n<td>316<\/td>\n<td>316<\/td>\n<td>316<\/td>\n<td>316<\/td>\n<td>316<\/td>\n<\/tr>\n<tr>\n<th>11<\/th>\n<td>Monel<\/td>\n<td>Stellite<\/td>\n<td>Monel<\/td>\n<td>Monel<\/td>\n<td>Monel<\/td>\n<\/tr>\n<tr>\n<th>12<\/th>\n<td>316 e Hardfaced<\/td>\n<td>Stellite<\/td>\n<td>316<\/td>\n<td>316<\/td>\n<td>316<\/td>\n<\/tr>\n<tr>\n<th>13<\/th>\n<td>Lega 20<\/td>\n<td>Lega 20<\/td>\n<td>Lega 20<\/td>\n<td>Lega 20<\/td>\n<td>Lega 20<\/td>\n<\/tr>\n<tr>\n<th>14<\/th>\n<td>Lega 20 e superficie dura<\/td>\n<td>Stellite<\/td>\n<td>Lega 20<\/td>\n<td>Lega 20<\/td>\n<td>Lega 20<\/td>\n<\/tr>\n<tr>\n<th>15<\/th>\n<td>304 e Hardfaced<\/td>\n<td>Stellite<\/td>\n<td>Stellite<\/td>\n<td>304<\/td>\n<td>304<\/td>\n<\/tr>\n<tr>\n<th>16<\/th>\n<td>316 e Hardfaced<\/td>\n<td>Stellite<\/td>\n<td>Stellite<\/td>\n<td>316<\/td>\n<td>316<\/td>\n<\/tr>\n<tr>\n<th>17<\/th>\n<td>347 e Hardfaced<\/td>\n<td>Stellite<\/td>\n<td>Stellite<\/td>\n<td>347<\/td>\n<td>347<\/td>\n<\/tr>\n<tr>\n<th>18<\/th>\n<td>Lega 20 e superficie dura<\/td>\n<td>Stellite<\/td>\n<td>Stellite<\/td>\n<td>Lega 20<\/td>\n<td>Lega 20<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"MATERIAL_SELECTION\"><\/span>SELEZIONE DEI MATERIALI<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<table>\n<tbody>\n<tr>\n<th>ORDINARE<\/th>\n<th>SERVIZIO CONSIGLIATO<\/th>\n<\/tr>\n<tr>\n<td><strong>13% Cr, acciaio inossidabile tipo 410<\/strong><\/td>\n<td>Per oli e vapori d&#039;olio e servizi generali con sedi e cunei trattati termicamente.<\/td>\n<\/tr>\n<tr>\n<td><strong>13% Cr, Tipo 410 pi\u00f9 riporto duro<\/strong><\/td>\n<td>Trim universale per servizi generali che richiedono una lunga durata fino a 593 \u00b0C (1100 \u00b0F).*<\/td>\n<\/tr>\n<tr>\n<td><strong>Tipo 316 inossidabile<\/strong><\/td>\n<td>Per liquidi e gas corrosivi per l&#039;acciaio inossidabile 410, fino a 537 \u00b0C (1000 \u00b0F).*<\/td>\n<\/tr>\n<tr>\n<td><strong>Monel<\/strong><\/td>\n<td>Per servizi corrosivi fino a 450\u00b0C (842\u00b0F) come acidi, alcali, soluzioni saline, ecc.<\/td>\n<\/tr>\n<tr>\n<td><strong>Lega 20<\/strong><\/td>\n<td>Per servizi corrosivi come acidi caldi da -49\u00b0F a 608oF (da -45\u00b0C a 320\u00b0C).<\/td>\n<\/tr>\n<tr>\n<td><strong>NACE<\/strong><\/td>\n<td>Finiture 316 o 410 appositamente trattate combinate opzionalmente con bulloni B7M e<br \/>\nDadi 2HM per soddisfare i requisiti NACE MR-01-75.<\/td>\n<\/tr>\n<tr>\n<td><strong>Stellite completa<\/strong><\/td>\n<td>Rivestimento completamente duro, adatto per servizi abrasivi e gravosi fino a 650 \u00b0C (1200 \u00b0F).<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>The material selection of gate valve mainly depends on the fluid medium and working environment. According to the different medium and environment, the material selection is also different. Generally speaking, the material selection of valve is divided into three aspects; the sealing surface of valve disc, in which the valve body is generally made of [&hellip;]<\/p>\n","protected":false},"author":290641,"featured_media":5742,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[135,1456],"class_list":["post-5733","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news","tag-gate-valve","tag-gate-valve-materials"],"_links":{"self":[{"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/posts\/5733","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/users\/290641"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/comments?post=5733"}],"version-history":[{"count":7,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/posts\/5733\/revisions"}],"predecessor-version":[{"id":5743,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/posts\/5733\/revisions\/5743"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/media\/5742"}],"wp:attachment":[{"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/media?parent=5733"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/categories?post=5733"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/tags?post=5733"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}