{"id":775,"date":"2026-10-02T13:11:13","date_gmt":"2026-10-02T11:11:13","guid":{"rendered":"https:\/\/www.valfonta.com\/valvules-de-seguretat\/"},"modified":"2026-10-05T15:22:23","modified_gmt":"2026-10-05T13:22:23","slug":"valvules-de-seguretat","status":"publish","type":"page","link":"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/","title":{"rendered":"V\u00e0lvules de seguretat"},"content":{"rendered":"<div class=\"wp-block-group vf-raiz vf-pl-hub is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-cat-wrap is-layout-flow wp-block-group-is-layout-flow\"><article class=\"wp-block-group vf-pdp vf-cat vf-c2 is-layout-flow wp-block-group-is-layout-flow\"><nav class=\"wp-block-group vf-breadcrumbs vfa-aria-label--Ruta%20de%20navegaci%C3%B3 is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a href=\"\/ca\/\">Inici<\/a><span class=\"vf-sep\">\u203a<\/span><span aria-current=\"page\">V\u00e0lvules de seguretat<\/span><\/p><\/nav><div class=\"wp-block-group vf-cat-hero vf-c2-hero is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-pdp-eyebrow wp-block-paragraph\">Protecci\u00f3 contra sobrepressions \u00b7 Badalona, des de 1962<\/p><h1 class=\"wp-block-heading\">V\u00e0lvules de seguretat<\/h1><p class=\"vf-lead wp-block-paragraph\">Detecten sobrepressions en dip\u00f2sits, calderes o canonades i descarreguen el fluid excessiu sense energia auxiliar; quan la pressi\u00f3 es normalitza, tornen a tancar. Models d'obertura total instant\u00e0nia i d'obertura progressiva, i v\u00e0lvules atmosf\u00e8riques per a recipients estancs.<\/p><ul class=\"vf-pdp-keys wp-block-list\"><li><span>Mides<\/span><b>\u00bc\u2033 a 4\u2033 \u00b7 DN15 a DN100<\/b><\/li><li><span>Pressi\u00f3<\/span><b>fins a PN25<\/b><\/li><li><span>Temperatura<\/span><b>fins a 280 \u00b0C<\/b><\/li><li><span>Material<\/span><b>Llaut\u00f3, bronze o inox 316L<\/b><\/li><\/ul><div class=\"wp-block-group vf-pdp-cta is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--pri\" href=\"#solicitar\">Sol\u00b7licitar oferta<\/a><a class=\"vf-btn vf-btn--sec\" href=\"#modelos\" data-vf-view-go=\"table\">Comparar models<\/a><\/p><\/div><p class=\"vf-pdp-contact wp-block-paragraph\">T\u00e9 dubtes sobre la pressi\u00f3 de tarat? Truqui al <a href=\"tel:+34933720888\">933 720 888<\/a> o escrigui a <a href=\"mailto:valfonta@valfonta.com\">valfonta@valfonta.com<\/a>.<\/p><\/div><div class=\"wp-block-group vf-c2-finder vfa-role--group vfa-aria-labelledby--vf-c2-fh is-layout-flow wp-block-group-is-layout-flow\"><p id=\"vf-c2-fh\" class=\"vf-fh wp-block-paragraph\">Trobi la seva v\u00e0lvula de seguretat<\/p><div class=\"wp-block-group vf-grp is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><span class=\"vf-lab\">Qu\u00e8 necessita<\/span><\/p><div class=\"wp-block-group vf-chips is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><button type=\"button\" class=\"vf-chip\" data-vf-filter=\"fun\" data-v=\"sobre\" aria-pressed=\"false\">Protegir contra la sobrepressi\u00f3<\/button><button type=\"button\" class=\"vf-chip\" data-vf-filter=\"fun\" data-v=\"vacio\" aria-pressed=\"false\">Equilibrar pressi\u00f3 i buit<\/button><\/p><\/div><\/div><div class=\"wp-block-group vf-grp is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><span class=\"vf-lab\">Obertura<\/span><\/p><div class=\"wp-block-group vf-chips is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><button type=\"button\" class=\"vf-chip\" data-vf-filter=\"ap\" data-v=\"total\" aria-pressed=\"false\">Total instant\u00e0nia<\/button><button type=\"button\" class=\"vf-chip\" data-vf-filter=\"ap\" data-v=\"prog\" aria-pressed=\"false\">Progressiva<\/button><\/p><\/div><\/div><div class=\"wp-block-group vf-grp is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><span class=\"vf-lab\">Mida d'entrada<\/span><\/p><div class=\"wp-block-group vf-chips is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><button type=\"button\" class=\"vf-chip\" data-vf-filter=\"dn\" data-v=\"8-20\" aria-pressed=\"false\">Fins a \u00be\u2033<\/button><button type=\"button\" class=\"vf-chip\" data-vf-filter=\"dn\" data-v=\"25-80\" aria-pressed=\"false\">1\u2033 a 3\u2033<\/button><button type=\"button\" class=\"vf-chip\" data-vf-filter=\"dn\" data-v=\"100-100\" aria-pressed=\"false\">4\u2033 o DN100<\/button><\/p><\/div><\/div><div class=\"wp-block-group vf-fbar is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--pri\" href=\"#modelos\"><span>Veure <b data-vf-count=\"\">4<\/b> <span data-vf-count-txt=\"\" data-one=\"model\" data-many=\"models\">models<\/span><\/span><\/a><button type=\"button\" class=\"vf-reset\" data-vf-reset=\"\" hidden>Treure filtres<\/button><\/p><\/div><\/div><\/div><ul class=\"vf-pdp-trust wp-block-list\"><li>V\u00e0lvules de seguretat assajades en banc<\/li><li>Subministrades tarades a la pressi\u00f3 que vost\u00e8 indiqui<\/li><li>Certificats de materials i colades sota comanda<\/li><li>Valfonta, Badalona, des de 1962<\/li><\/ul><nav class=\"wp-block-group vf-pdp-nav vfa-aria-label--Contingut%20de%20la%20fitxa is-layout-flow wp-block-group-is-layout-flow\"><ul class=\"wp-block-list\"><li><a href=\"#modelos\">Models<\/a><\/li><li><a href=\"#como-funciona\">Seguretat o alleujament<\/a><\/li><li><a href=\"#preguntas\">Preguntes<\/a><\/li><li><a href=\"#solicitar\">Sol\u00b7licitar oferta<\/a><\/li><\/ul><\/nav><section id=\"modelos\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Models de v\u00e0lvules de seguretat<\/h2><p class=\"vf-c2-intro wp-block-paragraph\">Filtri amb el cercador de la cap\u00e7alera o canvi\u00ef a la taula comparativa. Cada fitxa inclou especificacions, figures i mides disponibles i la fitxa t\u00e8cnica en PDF.<\/p><div class=\"wp-block-group vf-c2-bar is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-count vfa-aria-live--polite wp-block-paragraph\"><b data-vf-count=\"\">4<\/b> <span data-vf-count-txt=\"\" data-one=\"model\" data-many=\"models\" data-fit=\"1\">models<\/span><\/p><p class=\"vf-envolt wp-block-paragraph\"><button type=\"button\" class=\"vf-reset\" data-vf-reset=\"\" hidden>Treure filtres<\/button><\/p><div class=\"wp-block-group vf-view vfa-role--tablist vfa-aria-label--Vista is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><button type=\"button\" role=\"tab\" aria-selected=\"true\" data-vf-view=\"cards\">Targetes<\/button><button type=\"button\" role=\"tab\" aria-selected=\"false\" data-vf-view=\"table\">Taula comparativa<\/button><\/p><\/div><\/div><div class=\"wp-block-group vf-c2-cardsview is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-c2-group vfd-group--seg is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-ghead is-layout-flow wp-block-group-is-layout-flow\"><h3 class=\"wp-block-heading\">V\u00e0lvules de seguretat<\/h3><p class=\"wp-block-paragraph\">Protegeixen dip\u00f2sits, calderes i canonades: obren quan se supera la pressi\u00f3 de tarat i tornen a tancar quan es normalitza.<\/p><\/div><div class=\"wp-block-group vf-c2-cards vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-c2-card vfd-vf-item--p vfd-fun--sobre vfd-ap--total vfd-dnmin--8 vfd-dnmax--100 vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-img is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image vf-img-suelta\"><a href=\"\/ca\/producte\/valvula-de-seguretat-dobertura-total-alper\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/alper-1-700x700-1.jpg\" alt=\"V\u00e0lvula de seguretat ALPER d&#x27;obertura total amb palanca i escapament condu\u00eft a 90\u00b0\" class=\"wp-image-184\" width=\"160\" height=\"160\" loading=\"lazy\"><\/a><\/figure><\/div><div class=\"wp-block-group vf-body is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-tag wp-block-paragraph\">Obertura total instant\u00e0nia<\/p><h3 class=\"wp-block-heading\"><a href=\"\/ca\/producte\/valvula-de-seguretat-dobertura-total-alper\/\">ALPER<\/a><\/h3><p class=\"vf-sub wp-block-paragraph\">V\u00e0lvula de seguretat de molla, amb figures de palanca o herm\u00e8tiques i escapament condu\u00eft.<\/p><div class=\"wp-block-group vf-t-dl is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Mides<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">\u00bc\u2033 a 4\u2033 rosca \u00b7 DN15\u2013100 brides<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Pressi\u00f3<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">PN25 tancament met\u00e0l\u00b7lic \u00b7 PN16 PTFE<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Temperatura<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">fins a 280 \u00b0C <small>inox; 240 \u00b0C bronze<\/small><\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Material<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">bronze RG5 o inox 316L<\/p><\/div><\/div><p class=\"vf-fit wp-block-paragraph\"><b>Tri\u00ef-la si<\/b> necessita obertura total instant\u00e0nia en mides mitjanes o grans, amb rosca o brides.<\/p><div class=\"wp-block-group vf-act is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--sec\" href=\"\/ca\/producte\/valvula-de-seguretat-dobertura-total-alper\/\">Veure fitxa<\/a><a class=\"vf-btn vf-btn--pri\" href=\"#solicitar\" data-vf-model=\"V\u00e0lvula de seguretat ALPER\">Demanar oferta<\/a><\/p><\/div><\/div><\/div><div class=\"wp-block-group vf-c2-card vfd-vf-item--p vfd-fun--sobre vfd-ap--total vfd-dnmin--8 vfd-dnmax--20 vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-img is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image vf-img-suelta\"><a href=\"\/ca\/producte\/valvules-de-seguretat-per-a-calderes-jas\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/jas-1-700x700-1.jpg\" alt=\"V\u00e0lvula de seguretat JAS de llaut\u00f3 amb palanca i escapament condu\u00eft roscat\" class=\"wp-image-195\" width=\"160\" height=\"160\" loading=\"lazy\"><\/a><\/figure><\/div><div class=\"wp-block-group vf-body is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-tag wp-block-paragraph\">Obertura total instant\u00e0nia<\/p><h3 class=\"wp-block-heading\"><a href=\"\/ca\/producte\/valvules-de-seguretat-per-a-calderes-jas\/\">JAS<\/a><\/h3><p class=\"vf-sub wp-block-paragraph\">V\u00e0lvula de seguretat roscada i compacta, de llaut\u00f3 amb tancament de Viton.<\/p><div class=\"wp-block-group vf-t-dl is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Mides<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">\u00bc\u2033 a \u00be\u2033<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Pressi\u00f3<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">PN16<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Temperatura<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">fins a 180 \u00b0C<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Figures<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">310 amb palanca \u00b7 311 herm\u00e8tica<\/p><\/div><\/div><p class=\"vf-fit wp-block-paragraph\"><b>Tri\u00ef-la si<\/b> necessita una v\u00e0lvula de seguretat roscada i compacta, de \u00bc\u2033 a \u00be\u2033, fins a PN16 i 180 \u00b0C.<\/p><div class=\"wp-block-group vf-act is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--sec\" href=\"\/ca\/producte\/valvules-de-seguretat-per-a-calderes-jas\/\">Veure fitxa<\/a><a class=\"vf-btn vf-btn--pri\" href=\"#solicitar\" data-vf-model=\"V\u00e0lvula de seguretat JAS\">Demanar oferta<\/a><\/p><\/div><\/div><\/div><div class=\"wp-block-group vf-c2-card vfd-vf-item--p vfd-fun--sobre vfd-ap--prog vfd-dnmin--10 vfd-dnmax--80 vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-img is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image vf-img-suelta\"><a href=\"\/ca\/producte\/valvula-de-seguretat-d-apertura-progresiva-figura-368-371\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/alivio-368-700x700-1.jpg\" alt=\"V\u00e0lvula de seguretat d&#x27;obertura progressiva figura 368 de llaut\u00f3 amb palanca i connexi\u00f3 roscada\" class=\"wp-image-196\" width=\"160\" height=\"160\" loading=\"lazy\"><\/a><\/figure><\/div><div class=\"wp-block-group vf-body is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-tag wp-block-paragraph\">Obertura progressiva<\/p><h3 class=\"wp-block-heading\"><a href=\"\/ca\/producte\/valvula-de-seguretat-d-apertura-progresiva-figura-368-371\/\">368\u2013371<\/a><\/h3><p class=\"vf-sub wp-block-paragraph\">V\u00e0lvula de seguretat d'obertura progressiva, amb escapament lliure (368) o condu\u00eft (371).<\/p><div class=\"wp-block-group vf-t-dl is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Mides<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">3\/8\u2033 a 3\u2033<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Tarat<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">0\u20131 \u00b7 1\u201311 \u00b7 11\u201316 bar<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Temperatura<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">fins a 180 \u00b0C<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Escapament<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">lliure (368) \u00b7 condu\u00eft (371)<\/p><\/div><\/div><p class=\"vf-fit wp-block-paragraph\"><b>Tri\u00ef-la si<\/b> busca una obertura progressiva, no de dispar instantani.<\/p><div class=\"wp-block-group vf-act is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--sec\" href=\"\/ca\/producte\/valvula-de-seguretat-d-apertura-progresiva-figura-368-371\/\">Veure fitxa<\/a><a class=\"vf-btn vf-btn--pri\" href=\"#solicitar\" data-vf-model=\"V\u00e0lvula de seguretat 368\u2013371\">Demanar oferta<\/a><\/p><\/div><\/div><\/div><\/div><\/div><div class=\"wp-block-group vf-c2-group vfd-group--atm is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-ghead is-layout-flow wp-block-group-is-layout-flow\"><h3 class=\"wp-block-heading\">V\u00e0lvules atmosf\u00e8riques<\/h3><p class=\"wp-block-paragraph\">Deixen entrar aire si hi ha buit i, en la versi\u00f3 de doble regulaci\u00f3, sortir l'exc\u00e9s de pressi\u00f3, en rangs molt petits.<\/p><\/div><div class=\"wp-block-group vf-c2-cards vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-c2-card vfd-vf-item--p vfd-fun--vacio vfd-ap--prog vfd-dnmin--15 vfd-dnmax--100 vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-img is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image vf-img-suelta\"><a href=\"\/ca\/producte\/valvules-atmosferiques-alper\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/alperatmos-2-700x700-1.jpg\" alt=\"V\u00e0lvula atmosf\u00e8rica ALPER de doble regulaci\u00f3 amb escapament condu\u00eft a 90\u00b0 i malla de protecci\u00f3\" class=\"wp-image-197\" width=\"160\" height=\"160\" loading=\"lazy\"><\/a><\/figure><\/div><div class=\"wp-block-group vf-body is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-tag wp-block-paragraph\">Pressi\u00f3 i buit<\/p><h3 class=\"wp-block-heading\"><a href=\"\/ca\/producte\/valvules-atmosferiques-alper\/\">ALPER atmosf\u00e8rica<\/a><\/h3><p class=\"vf-sub wp-block-paragraph\">V\u00e0lvula atmosf\u00e8rica per a recipients estancs: regulaci\u00f3 simple (buit) o doble (pressi\u00f3 i buit).<\/p><div class=\"wp-block-group vf-t-dl is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Mides<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">\u00bd\u2033 a 4\u2033 rosca \u00b7 brides DIN<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Pressi\u00f3 positiva<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">+0,080 a +8 bar<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Buit<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">\u22120,050 a \u22120,650 bar<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Temperatura<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">fins a 280 \u00b0C <small>inox<\/small><\/p><\/div><\/div><p class=\"vf-fit wp-block-paragraph\"><b>Tri\u00ef-la si<\/b> necessita equilibrar un dip\u00f2sit estanc amb l'atmosfera, contra el buit o la pressi\u00f3.<\/p><div class=\"wp-block-group vf-act is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--sec\" href=\"\/ca\/producte\/valvules-atmosferiques-alper\/\">Veure fitxa<\/a><a class=\"vf-btn vf-btn--pri\" href=\"#solicitar\" data-vf-model=\"V\u00e0lvula atmosf\u00e8rica ALPER\">Demanar oferta<\/a><\/p><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"wp-block-group vf-c2-table vfa-hidden-- is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-tbl-wrap is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-table vf-tbl vf-tbl--grid\"><table><thead><tr><th scope=\"col\"><button type=\"button\" data-vf-sort=\"0\" data-type=\"t\">Model<\/button><\/th><th scope=\"col\"><button type=\"button\" data-vf-sort=\"1\" data-type=\"t\">Obertura<\/button><\/th><th scope=\"col\"><button type=\"button\" data-vf-sort=\"2\" data-type=\"t\">Mides d'entrada<\/button><\/th><th scope=\"col\"><button type=\"button\" data-vf-sort=\"3\" data-type=\"t\">Connexi\u00f3<\/button><\/th><th scope=\"col\"><button type=\"button\" data-vf-sort=\"4\" data-type=\"t\">Material<\/button><\/th><th scope=\"col\"><button type=\"button\" data-vf-sort=\"5\" data-type=\"t\">Pressi\u00f3<\/button><\/th><th scope=\"col\"><button type=\"button\" data-vf-sort=\"6\" data-type=\"n\">T. m\u00e0x. (\u00b0C)<\/button><\/th><\/tr><\/thead><tbody><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"t\" data-fun=\"sobre\" data-ap=\"total\" data-dnmin=\"8\" data-dnmax=\"100\"><\/span><span class=\"vf-dato\" hidden data-s=\"ALPER\"><\/span><a href=\"\/ca\/producte\/valvula-de-seguretat-dobertura-total-alper\/\">ALPER<\/a><\/th><td><span class=\"vf-dato\" hidden data-s=\"Total instant\u00e0nia\"><\/span>Total instant\u00e0nia<\/td><td><span class=\"vf-dato\" hidden data-s=\"\u00bc\u2033\u20134\u2033 \u00b7 DN15\u2013100\"><\/span>\u00bc\u2033\u20134\u2033 \u00b7 DN15\u2013100<\/td><td><span class=\"vf-dato\" hidden data-s=\"Rosca BSP o brides DIN\"><\/span>Rosca BSP o brides DIN<\/td><td><span class=\"vf-dato\" hidden data-s=\"Bronze RG5 o inox 316L\"><\/span>Bronze RG5 o inox 316L<\/td><td><span class=\"vf-dato\" hidden data-s=\"PN25 (PN16 amb PTFE)\"><\/span>PN25 (PN16 amb PTFE)<\/td><td><span class=\"vf-dato\" hidden data-s=\"280\"><\/span>280 inox \u00b7 240 bronze<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"t\" data-fun=\"sobre\" data-ap=\"total\" data-dnmin=\"8\" data-dnmax=\"20\"><\/span><span class=\"vf-dato\" hidden data-s=\"JAS\"><\/span><a href=\"\/ca\/producte\/valvules-de-seguretat-per-a-calderes-jas\/\">JAS<\/a><\/th><td><span class=\"vf-dato\" hidden data-s=\"Total instant\u00e0nia\"><\/span>Total instant\u00e0nia<\/td><td><span class=\"vf-dato\" hidden data-s=\"\u00bc\u2033\u2013\u00be\u2033\"><\/span>\u00bc\u2033\u2013\u00be\u2033<\/td><td><span class=\"vf-dato\" hidden data-s=\"Rosca BSP\"><\/span>Rosca BSP<\/td><td><span class=\"vf-dato\" hidden data-s=\"Llaut\u00f3, tancament Viton\"><\/span>Llaut\u00f3, tancament Viton<\/td><td><span class=\"vf-dato\" hidden data-s=\"PN16\"><\/span>PN16<\/td><td><span class=\"vf-dato\" hidden data-s=\"180\"><\/span>180<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"t\" data-fun=\"sobre\" data-ap=\"prog\" data-dnmin=\"10\" data-dnmax=\"80\"><\/span><span class=\"vf-dato\" hidden data-s=\"368\u2013371\"><\/span><a href=\"\/ca\/producte\/valvula-de-seguretat-d-apertura-progresiva-figura-368-371\/\">368\u2013371<\/a><\/th><td><span class=\"vf-dato\" hidden data-s=\"Progressiva\"><\/span>Progressiva<\/td><td><span class=\"vf-dato\" hidden data-s=\"3\/8\u2033\u20133\u2033\"><\/span>3\/8\u2033\u20133\u2033<\/td><td><span class=\"vf-dato\" hidden data-s=\"Rosca BSP\"><\/span>Rosca BSP<\/td><td><span class=\"vf-dato\" hidden data-s=\"Llaut\u00f3 \/ bronze\"><\/span>Llaut\u00f3 \/ bronze<\/td><td><span class=\"vf-dato\" hidden data-s=\"Tarat 0\u201316 bar (PN16 bronze \u00b7 PN12 Viton)\"><\/span>Tarat 0\u201316 bar (PN16 bronze \u00b7 PN12 Viton)<\/td><td><span class=\"vf-dato\" hidden data-s=\"180\"><\/span>180<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"t\" data-fun=\"vacio\" data-ap=\"prog\" data-dnmin=\"15\" data-dnmax=\"100\"><\/span><span class=\"vf-dato\" hidden data-s=\"ALPER atmosf\u00e8rica\"><\/span><a href=\"\/ca\/producte\/valvules-atmosferiques-alper\/\">ALPER atmosf\u00e8rica<\/a><\/th><td><span class=\"vf-dato\" hidden data-s=\"Progressiva\"><\/span>Progressiva<\/td><td><span class=\"vf-dato\" hidden data-s=\"\u00bd\u2033\u20134\u2033 \u00b7 DN15\u2013100\"><\/span>\u00bd\u2033\u20134\u2033 \u00b7 DN15\u2013100<\/td><td><span class=\"vf-dato\" hidden data-s=\"Rosca BSP o brides DIN\"><\/span>Rosca BSP o brides DIN<\/td><td><span class=\"vf-dato\" hidden data-s=\"Bronze RG5 o inox 316L\"><\/span>Bronze RG5 o inox 316L<\/td><td><span class=\"vf-dato\" hidden data-s=\"+0,080 a +8 bar \u00b7 \u22120,050 a \u22120,650 bar\"><\/span>+0,080 a +8 bar \u00b7 \u22120,050 a \u22120,650 bar<\/td><td><span class=\"vf-dato\" hidden data-s=\"280\"><\/span>280 inox<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Dades de les fitxes t\u00e8cniques de cada model. Totes treballen amb l\u00edquids, aire comprimit, gasos neutres i vapor. A l'ALPER, les brides DIN arriben a DN32 en les figures d'inox.<\/p><\/div><div class=\"wp-block-group vf-c2-empty vfa-hidden-- is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\"><b>Cap model no encaixa amb aquests filtres.<\/b> Expliqui'ns la seva instal\u00b7laci\u00f3 al <a href=\"#solicitar\" data-vf-model=\"No ho s\u00e9 \/ necessito assessorament\">formulari<\/a> i li recomanarem la v\u00e0lvula.<\/p><\/div><\/section><section id=\"como-funciona\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">V\u00e0lvula de seguretat i v\u00e0lvula d'alleujament: en qu\u00e8 es diferencien<\/h2><div class=\"wp-block-group vf-c2-how vf-solo is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-txt is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">La difer\u00e8ncia principal \u00e9s en la manera d'obrir. L'<a href=\"\/ca\/producte\/valvula-de-seguretat-dobertura-total-alper\/\">ALPER<\/a> i la <a href=\"\/ca\/producte\/valvules-de-seguretat-per-a-calderes-jas\/\">JAS<\/a> s\u00f3n d'<strong>obertura total instant\u00e0nia<\/strong> (A.I.T.): quan se supera la pressi\u00f3 de tarat, obren del tot i descarreguen el fluid excessiu. La <a href=\"\/ca\/producte\/valvula-de-seguretat-d-apertura-progresiva-figura-368-371\/\">368\u2013371<\/a> \u00e9s d'<strong>obertura progressiva<\/strong>: comen\u00e7a a obrir quan se supera el tarat, i la seva fitxa t\u00e8cnica tamb\u00e9 la denomina v\u00e0lvula d'alleujament.<\/p><p class=\"wp-block-paragraph\">Les <a href=\"\/ca\/valvules-alleujament-de-pressio\/\">v\u00e0lvules d'alleujament<\/a> i d'exc\u00e9s de pressi\u00f3 de Valfonta obren proporcionalment a l'augment de pressi\u00f3 i mantenen la pressi\u00f3 aig\u00fces amunt en el valor ajustat. Els seus manuals adverteixen que no s\u00f3n v\u00e0lvules de seguretat: si la instal\u00b7laci\u00f3 necessita protecci\u00f3 contra sobrepressions, cal muntar-hi, a m\u00e9s, una v\u00e0lvula de seguretat. Ho expliquem a la difer\u00e8ncia entre v\u00e0lvula de seguretat i d'alleujament.<\/p><p class=\"wp-block-paragraph\">Les <a href=\"\/ca\/producte\/valvules-atmosferiques-alper\/\">v\u00e0lvules atmosf\u00e8riques ALPER<\/a> compleixen una altra funci\u00f3: permeten l'entrada o la sortida d'aire en recipients estancs. Les de regulaci\u00f3 simple actuen contra el buit i les de doble regulaci\u00f3, tamb\u00e9 contra la pressi\u00f3 positiva, en rangs molt petits.<\/p><\/div><\/div><\/section><section id=\"normativa\" class=\"wp-block-group vf-c2-norm is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Certificaci\u00f3<\/h2><div class=\"wp-block-group vf-norm vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><b>Directiva d'equips a pressi\u00f3<\/b><\/p><p class=\"wp-block-paragraph\">La 368\u2013371 t\u00e9 certificat PED 2014\/68\/UE. A l'ALPER, les figures roscades 375, 376, 385, 386, 395 i 396 porten certificat CE; per a les embridades, consulti'ns. Les v\u00e0lvules atmosf\u00e8riques no porten certificat CE.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><b>Certificats sota comanda<\/b><\/p><p class=\"wp-block-paragraph\">Per a l'ALPER, la JAS i la 368\u2013371, si se sol\u00b7liciten amb antelaci\u00f3, es lliuren amb la v\u00e0lvula certificats de materials, colades i rendiments.<\/p><\/div><\/div><p class=\"wp-block-paragraph\">Consulti i descarregui els <a href=\"\/ca\/certificats\/\">certificats de Valfonta<\/a>.<\/p><\/section><section id=\"preguntas\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Preguntes freq\u00fcents sobre v\u00e0lvules de seguretat<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Quina difer\u00e8ncia hi ha entre una v\u00e0lvula de seguretat i una d&#x27;alleujament?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">En la manera d'obrir i en la seva funci\u00f3. Les v\u00e0lvules de seguretat ALPER i JAS obren de manera total i instant\u00e0nia quan se supera el tarat; la 368\u2013371 obre de manera progressiva i la seva fitxa tamb\u00e9 la denomina v\u00e0lvula d'alleujament. Les <a href=\"\/ca\/valvules-alleujament-de-pressio\/\">v\u00e0lvules d'alleujament i d'exc\u00e9s de pressi\u00f3<\/a> obren proporcionalment a l'augment de pressi\u00f3 i no substitueixen una v\u00e0lvula de seguretat.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Es lliuren tarades?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">S\u00ed. Les v\u00e0lvules de seguretat ALPER, JAS i 368\u2013371 s'assagen en banc de proves i se subministren tarades a la pressi\u00f3 que indiqui el client.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Amb quins fluids treballen?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Amb l\u00edquids, aire comprimit, gasos neutres i vapor. La temperatura m\u00e0xima \u00e9s de 180 \u00b0C a la JAS i la 368\u2013371, i de 280 \u00b0C a les ALPER d'inox.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Per a qu\u00e8 serveix una v\u00e0lvula atmosf\u00e8rica?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Per equilibrar la pressi\u00f3 d'un recipient estanc amb l'atmosf\u00e8rica: deixa entrar aire si hi ha buit i, en la versi\u00f3 de doble regulaci\u00f3, deixa sortir l'exc\u00e9s de pressi\u00f3.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Quines dades necessita Valfonta per fer una oferta?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">El fluid i la seva temperatura, la pressi\u00f3 de tarat, la mida i la connexi\u00f3 (rosca o brides), el material i si la vol amb palanca o herm\u00e8tica.<\/p><\/div><\/details><\/section><section id=\"guias\" class=\"wp-block-group vf-c2-more is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-sin-idioma is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"vf-sin-idioma wp-block-heading\">Guies t\u00e8cniques sobre seguretat i alleujament<\/h2><div class=\"wp-block-group vf-arts vf-sin-idioma vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-sin-idioma vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a data-vf-href=\"\/blog\/diferencia-entre-valvula-de-seguridad-y-de-alivio\/\">Difer\u00e8ncia entre v\u00e0lvula de seguretat i d'alleujament<\/a><\/p><\/div><div class=\"wp-block-group vf-sin-idioma vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a data-vf-href=\"\/blog\/tarado-de-valvulas-de-alivio\/\">Tarat de v\u00e0lvules d'alleujament i auditoria de seguretat<\/a><\/p><\/div><\/div><\/div><p class=\"vf-fams wp-block-paragraph\"><b>Altres fam\u00edlies:<\/b> <a href=\"\/ca\/valvules-alleujament-de-pressio\/\">V\u00e0lvules d'alleujament de pressi\u00f3<\/a> \u00b7 <a href=\"\/ca\/valvules-reductores-de-pressio\/\">V\u00e0lvules reductores de pressi\u00f3<\/a> \u00b7 <a href=\"\/ca\/valvula-de-control\/\">V\u00e0lvules de control<\/a> \u00b7 <a href=\"\/ca\/ejectors-vapor-liquids\/\">Ejectors<\/a><\/p><\/section><section id=\"solicitar\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-quote is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Sol\u00b7liciti oferta d'una v\u00e0lvula de seguretat<\/h2><p class=\"wp-block-paragraph\">Indiqui'ns les dades de la seva instal\u00b7laci\u00f3 i li recomanarem el model, la figura i la mida adequats.<\/p><ul class=\"wp-block-list\"><li>Fluid i temperatura<\/li><li>Pressi\u00f3 de tarat (o buit de tarat)<\/li><li>Mida i connexi\u00f3 (rosca o brides)<\/li><li>Material i si la vol amb palanca o herm\u00e8tica<\/li><\/ul><p class=\"vf-pdp-contact wp-block-paragraph\">Tamb\u00e9 pot trucar al <a href=\"tel:+34933720888\">933 720 888<\/a>.<\/p><\/div>\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f578-o1\" lang=\"ca\" dir=\"ltr\" data-wpcf7-id=\"578\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/ca\/wp-json\/wp\/v2\/pages\/775#wpcf7-f578-o1\" method=\"post\" class=\"wpcf7-form init vf-form wpcf7-acceptance-as-validation\" aria-label=\"Formulari de contacte\" novalidate=\"novalidate\" data-status=\"init\" toolname=\"solicitar_oferta\" tooldescription=\"Demana a Valfonta una oferta dels models d&#039;aquesta p\u00e0gina (model, di\u00e0metre, fluid i pressions); respon una persona de l&#039;equip.\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"578\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.2.3\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"ca\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f578-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/><input type=\"hidden\" name=\"_vf_t\" value=\"1792706879.0cd9bbd5e15262d7\" \/>\n<\/fieldset>\n<input class=\"wpcf7-form-control wpcf7-hidden\" value=\"V\u00e1lvulas de seguridad\" type=\"hidden\" name=\"familia\" \/><label>Nom *<span class=\"wpcf7-form-control-wrap\" data-name=\"nombre\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" autocomplete=\"name\" aria-required=\"true\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"nombre\" \/><\/span><\/label><label>Empresa<span class=\"wpcf7-form-control-wrap\" data-name=\"empresa\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" autocomplete=\"organization\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"empresa\" \/><\/span><\/label><label>Correu electr\u00f2nic *<span class=\"wpcf7-form-control-wrap\" data-name=\"email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" autocomplete=\"email\" aria-required=\"true\" aria-invalid=\"false\" value=\"\" type=\"email\" name=\"email\" \/><\/span><\/label><label>Tel\u00e8fon<span class=\"wpcf7-form-control-wrap\" data-name=\"telefono\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-tel wpcf7-text wpcf7-validates-as-tel\" autocomplete=\"tel\" aria-invalid=\"false\" value=\"\" type=\"tel\" name=\"telefono\" \/><\/span><\/label><label class=\"vf-full\">Model<span class=\"wpcf7-form-control-wrap\" data-name=\"modelo\"><select class=\"wpcf7-form-control wpcf7-select\" aria-invalid=\"false\" name=\"modelo\"><option value=\"\">Seleccioni<\/option><option value=\"V\u00e0lvula de seguretat ALPER\">V\u00e0lvula de seguretat ALPER<\/option><option value=\"V\u00e0lvula de seguretat JAS\">V\u00e0lvula de seguretat JAS<\/option><option value=\"V\u00e0lvula de seguretat 368\u2013371\">V\u00e0lvula de seguretat 368\u2013371<\/option><option value=\"V\u00e0lvula atmosf\u00e8rica ALPER\">V\u00e0lvula atmosf\u00e8rica ALPER<\/option><option value=\"No ho s\u00e9 \/ necessito assessorament\">No ho s\u00e9 \/ necessito assessorament<\/option><\/select><\/span><\/label><label>Pressi\u00f3 de tarat (bar)<span class=\"wpcf7-form-control-wrap\" data-name=\"tarado\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"tarado\" \/><\/span><\/label><label>Temperatura (\u00b0C)<span class=\"wpcf7-form-control-wrap\" data-name=\"temperatura\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"temperatura\" \/><\/span><\/label><label class=\"vf-full\">Missatge<span class=\"wpcf7-form-control-wrap\" data-name=\"mensaje\"><textarea cols=\"40\" rows=\"4\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea\" aria-invalid=\"false\" name=\"mensaje\"><\/textarea><\/span><\/label><label class=\"vf-chk vf-full\"><span class=\"wpcf7-form-control-wrap\" data-name=\"privacidad\"><span class=\"wpcf7-form-control wpcf7-acceptance\"><span class=\"wpcf7-list-item\"><input type=\"checkbox\" name=\"privacidad\" value=\"1\" aria-invalid=\"false\" \/><\/span><\/span><\/span> <span>He llegit i accepto la <a href=\"\/ca\/politica-de-privacitat\/\">pol\u00edtica de privacitat<\/a> *<\/span><\/label><input class=\"wpcf7-form-control wpcf7-submit has-spinner vf-btn vf-btn--pri\" type=\"submit\" value=\"Enviar la sol\u00b7licitud\" \/><span class=\"vf-hp\" aria-hidden=\"true\"><label>Web <input type=\"text\" name=\"vf_web\" value=\"\" tabindex=\"-1\" autocomplete=\"off\" toolparamdescription=\"Campo de control: d\u00e9jalo vac\u00edo\"><\/label><\/span><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<\/form>\n<\/div>\n\n<\/div><\/section><div class=\"wp-block-group vf-pdp-bar is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--sec\" href=\"tel:+34933720888\">Trucar<\/a><a class=\"vf-btn vf-btn--pri\" href=\"#solicitar\">Sol\u00b7licitar oferta<\/a><\/p><\/div><\/article><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Inici\u203aV\u00e0lvules de seguretat Protecci\u00f3 contra sobrepressions \u00b7 Badalona, des de 1962 V\u00e0lvules de seguretat Detecten sobrepressions en dip\u00f2sits, calderes o canonades i descarreguen el fluid excessiu sense energia auxiliar; quan la pressi\u00f3 es normalitza, tornen a tancar. Models d'obertura total instant\u00e0nia i d'obertura progressiva, i v\u00e0lvules atmosf\u00e8riques per a recipients estancs. Sol\u00b7licitar ofertaComparar models T\u00e9 ... <a title=\"V\u00e0lvules de seguretat\" class=\"read-more\" href=\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/\" aria-label=\"M\u00e9s informaci\u00f3 sobre V\u00e0lvules de seguretat\">Llegiu m\u00e9s<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_generate-full-width-content":"true","_generate-disable-headline":"true","rank_math_title":"V\u00e0lvules de seguretat i atmosf\u00e8riques | Valfonta","rank_math_description":"V\u00e0lvules de seguretat ALPER, JAS i 368\u2013371 d'obertura total o progressiva, de \u00bc\u2033 a 4\u2033 o DN100, i v\u00e0lvules atmosf\u00e8riques ALPER per a pressi\u00f3 i buit.","rank_math_focus_keyword":"","vf_jsonld":"[{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.valfonta.com\/#organization\",\"name\":\"Valfonta\",\"legalName\":\"Val Fonta, S.L.\",\"taxID\":\"B59935718\",\"url\":\"https:\/\/www.valfonta.com\/ca\/\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valfonta-logo.webp\"},\"foundingDate\":\"1962\",\"email\":\"valfonta@valfonta.com\",\"telephone\":\"+34 933 720 888\",\"address\":{\"@type\":\"PostalAddress\",\"streetAddress\":\"C\/ Bronze 26, Pol. Ind. Les Guixeres\",\"postalCode\":\"08915\",\"addressLocality\":\"Badalona\",\"addressRegion\":\"Barcelona\",\"addressCountry\":\"ES\"},\"description\":\"Disseny, fabricaci\u00f3 i venda de v\u00e0lvules reductores de pressi\u00f3, v\u00e0lvules d'alleujament de pressi\u00f3 i v\u00e0lvules de control.\"},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.valfonta.com\/#website\",\"url\":\"https:\/\/www.valfonta.com\/ca\/\",\"name\":\"Valfonta\",\"publisher\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"ca\"},{\"@type\":\"CollectionPage\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/#webpage\",\"url\":\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/\",\"name\":\"V\u00e0lvules de seguretat i atmosf\u00e8riques | Valfonta\",\"description\":\"V\u00e0lvules de seguretat ALPER, JAS i 368\u2013371 d'obertura total o progressiva, de \u00bc\u2033 a 4\u2033 o DN100, i v\u00e0lvules atmosf\u00e8riques ALPER per a pressi\u00f3 i buit.\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"ca\",\"datePublished\":\"2020-03-11T11:01:53+02:00\",\"dateModified\":\"2026-01-13T10:37:53+02:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/#breadcrumb\"},\"mainEntity\":{\"@id\":\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/#modelos\"},\"primaryImageOfPage\":{\"@type\":\"ImageObject\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/alper-1.jpg\"}},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Inici\",\"item\":\"https:\/\/www.valfonta.com\/ca\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"V\u00e0lvules de seguretat\",\"item\":\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/\"}]},{\"@type\":\"ItemList\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/#modelos\",\"name\":\"V\u00e0lvules de seguretat\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"url\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-de-seguretat-dobertura-total-alper\/\",\"name\":\"V\u00e0lvula de seguretat ALPER\"},{\"@type\":\"ListItem\",\"position\":2,\"url\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvules-de-seguretat-per-a-calderes-jas\/\",\"name\":\"V\u00e0lvules de seguretat JAS\"},{\"@type\":\"ListItem\",\"position\":3,\"url\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-de-seguretat-d-apertura-progresiva-figura-368-371\/\",\"name\":\"V\u00e0lvula de seguretat d'obertura progressiva 368 \u2013 371\"},{\"@type\":\"ListItem\",\"position\":4,\"url\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvules-atmosferiques-alper\/\",\"name\":\"V\u00e0lvules atmosf\u00e8riques ALPER\"}]},{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Quina difer\u00e8ncia hi ha entre una v\u00e0lvula de seguretat i una d'alleujament?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"En la manera d'obrir i en la seva funci\u00f3. Les v\u00e0lvules de seguretat ALPER i JAS obren de manera total i instant\u00e0nia quan se supera el tarat; la 368\u2013371 obre de manera progressiva i la seva fitxa tamb\u00e9 la denomina v\u00e0lvula d'alleujament. Les v\u00e0lvules d'alleujament i d'exc\u00e9s de pressi\u00f3 obren proporcionalment a l'augment de pressi\u00f3 i no substitueixen una v\u00e0lvula de seguretat.\"}},{\"@type\":\"Question\",\"name\":\"Es lliuren tarades?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"S\u00ed. Les v\u00e0lvules de seguretat ALPER, JAS i 368\u2013371 s'assagen en banc de proves i se subministren tarades a la pressi\u00f3 que indiqui el client.\"}},{\"@type\":\"Question\",\"name\":\"Amb quins fluids treballen?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Amb l\u00edquids, aire comprimit, gasos neutres i vapor. La temperatura m\u00e0xima \u00e9s de 180 \u00b0C a la JAS i la 368\u2013371, i de 280 \u00b0C a les ALPER d'inox.\"}},{\"@type\":\"Question\",\"name\":\"Per a qu\u00e8 serveix una v\u00e0lvula atmosf\u00e8rica?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Per equilibrar la pressi\u00f3 d'un recipient estanc amb l'atmosf\u00e8rica: deixa entrar aire si hi ha buit i, en la versi\u00f3 de doble regulaci\u00f3, deixa sortir l'exc\u00e9s de pressi\u00f3.\"}},{\"@type\":\"Question\",\"name\":\"Quines dades necessita Valfonta per fer una oferta?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"El fluid i la seva temperatura, la pressi\u00f3 de tarat, la mida i la connexi\u00f3 (rosca o brides), el material i si la vol amb palanca o herm\u00e8tica.\"}}]}]}]","footnotes":"","_vg_translation_of":"45","_vg_lang":"ca","_vg_wpml_state":"{\"lang\":\"ca\",\"trid\":\"45\",\"src\":\"es\"}"},"class_list":["post-775","page","type-page","status-publish"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/pages\/775","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/comments?post=775"}],"version-history":[{"count":1,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/pages\/775\/revisions"}],"predecessor-version":[{"id":776,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/pages\/775\/revisions\/776"}],"wp:attachment":[{"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/media?parent=775"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}