{"id":787,"date":"2026-10-02T13:17:41","date_gmt":"2026-10-02T11:17:41","guid":{"rendered":"https:\/\/www.valfonta.com\/producto\/valvula-exces-de-pressio\/"},"modified":"2026-10-22T09:24:18","modified_gmt":"2026-10-22T07:24:18","slug":"valvula-exces-de-pressio","status":"publish","type":"product","link":"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio\/","title":{"rendered":"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S1"},"content":{"rendered":"<div class=\"wp-block-group vf-raiz vf-pl-ficha-producto 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\" aria-hidden=\"true\">\u203a<\/span><a href=\"https:\/\/www.valfonta.com\/ca\/valvules-alleujament-de-pressio\/\">V\u00e0lvules d'alleujament de pressi\u00f3<\/a><span class=\"vf-sep\" aria-hidden=\"true\">\u203a<\/span><span aria-current=\"page\">V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S1<\/span><\/p><\/nav><article class=\"wp-block-group vf-pdp vfd-model--S1 is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-pdp-hero is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-pdp-title is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-pdp-eyebrow wp-block-paragraph\">V\u00e0lvula d'exc\u00e9s de pressi\u00f3 \u00b7 Membrana i manxa<\/p><h1 class=\"wp-block-heading\">V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S1<\/h1><\/div><div class=\"wp-block-group vf-pdp-media is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><span class=\"vf-pdp-badge\">Fins a DN150<\/span><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M1-S1-3D-700x700-1.jpg\" alt=\"V\u00e0lvula d&#x27;exc\u00e9s de pressi\u00f3 S1 de Valfonta amb actuador de membrana i connexi\u00f3 per brides\" class=\"wp-image-192\" width=\"700\" height=\"700\" fetchpriority=\"high\"><\/p><\/div><div class=\"wp-block-group vf-pdp-body is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-lead wp-block-paragraph\">V\u00e0lvula d'exc\u00e9s de pressi\u00f3 autoaccionada, de seient simple, amb actuador de membrana i eix segellat per manxa d'inox. Limita la pressi\u00f3 d'entrada al valor tarat, de 0,5 a 15 barg, en vapor, aire comprimit, gasos i l\u00edquids, de DN15 a DN150.<\/p><ul class=\"vf-pdp-keys wp-block-list\"><li><span>Di\u00e0metres<\/span><b>DN15 a DN150<\/b><\/li><li><span>Pressi\u00f3 nominal<\/span><b>PN25 \u2013 PN40 <small>Classe 150 \u2013 300<\/small><\/b><\/li><li><span>Rang de tarat<\/span><b>0,5 a 15 barg<\/b><\/li><li><span>Temperatura<\/span><b>fins a 220 \u00b0C <small>segons la membrana<\/small><\/b><\/li><li><span>Kv<\/span><b>3,5 a 240 m\u00b3\/h<\/b><\/li><li><span>Fluids<\/span><b>Vapor, l\u00edquids, aire i gasos<\/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=\"\/wp-content\/uploads\/2026\/10\/S1-18A-ENG.pdf\" target=\"_blank\" rel=\"noopener\">Descarregar la fitxa t\u00e8cnica <small>PDF<\/small><\/a><\/p><\/div><p class=\"vf-pdp-contact wp-block-paragraph\">T\u00e9 dubtes sobre el tarat o el dimensionament? 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><ul class=\"vf-pdp-trust wp-block-list\"><li>Disseny i fabricaci\u00f3 pr\u00f2pies a Badalona<\/li><li>Marcatge ATEX II 2 GD per a zones 1 i 21<\/li><li>Eix segellat per manxa de doble capa d'inox<\/li><li>Recanvis originals per n\u00famero de s\u00e8rie<\/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=\"#aplicaciones\">Aplicacions<\/a><\/li><li><a href=\"#especificaciones\">Especificacions<\/a><\/li><li><a href=\"#funcionamiento\">Funcionament<\/a><\/li><li><a href=\"#instalacion\">Instal\u00b7laci\u00f3<\/a><\/li><li><a href=\"#documentacion\">Documentaci\u00f3<\/a><\/li><li><a href=\"#comparar\">Comparar<\/a><\/li><li><a href=\"#preguntas\">Preguntes<\/a><\/li><li><a href=\"#solicitar\">Sol\u00b7licitar oferta<\/a><\/li><\/ul><\/nav><section id=\"aplicaciones\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-pdp-two 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\">Per a qu\u00e8 s'utilitza la S1<\/h2><p class=\"wp-block-paragraph\">La <strong>S1<\/strong> \u00e9s una <a href=\"https:\/\/www.valfonta.com\/ca\/valvules-alleujament-de-pressio\/\">v\u00e0lvula d'exc\u00e9s de pressi\u00f3<\/a> autoaccionada, sense energia auxiliar. Roman tancada mentre la pressi\u00f3 d'entrada \u00e9s per sota del valor tarat i s'obre de forma proporcional quan el supera, de manera que la pressi\u00f3 aig\u00fces amunt no sobrepassa el valor ajustat.<\/p><p class=\"wp-block-paragraph\">Arriba a DN150 i a un Kv de 240 m\u00b3\/h. L'eix del tancament est\u00e0 segellat per una <strong>manxa de doble capa d'acer inoxidable<\/strong> amb sistema antitorsi\u00f3, i la membrana est\u00e0 refor\u00e7ada amb tela interm\u00e8dia. M\u00e9s informaci\u00f3 sobre les v\u00e0lvules d'exc\u00e9s de pressi\u00f3 autoreguladores.<\/p><ul class=\"vf-pdp-apps wp-block-list\"><li><b>Vapor<\/b><span>Fins a 220 \u00b0C amb membrana EPDM+PTFE i tanc de condensaci\u00f3.<\/span><\/li><li><b>Aire comprimit i gasos neutres<\/b><span>Limitaci\u00f3 de la pressi\u00f3 de la l\u00ednia al valor tarat.<\/span><\/li><li><b>Aigua, oli i altres l\u00edquids<\/b><span>Alleujament proporcional de l'exc\u00e9s de pressi\u00f3.<\/span><\/li><li><b>L\u00ednies de gran di\u00e0metre<\/b><span>De DN15 a DN150, amb Kv de fins a 240 m\u00b3\/h.<\/span><\/li><li><b>Zones ATEX<\/b><span>Categoria II 2 GD per a zones 1, 2, 21 i 22.<\/span><\/li><\/ul><\/div><aside class=\"wp-block-group vf-pdp-fit is-layout-flow wp-block-group-is-layout-flow\"><h3 class=\"wp-block-heading\">Tri\u00ef la S1 si\u2026<\/h3><ul class=\"vf-si wp-block-list\"><li>Necessita fins a DN150 o un Kv de fins a 240 m\u00b3\/h.<\/li><li>Treballa amb vapor o l\u00edquids calents, fins a 220 \u00b0C.<\/li><li>Vol l'eix segellat per manxa d'acer inoxidable.<\/li><li>La seva pressi\u00f3 de tarat \u00e9s entre 0,5 i 15 barg.<\/li><\/ul><h3 class=\"wp-block-heading\">Millor un altre model si\u2026<\/h3><ul class=\"vf-no wp-block-list\"><li>Necessita tarar per sota de 0,5 barg: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv55\/\">PRV55<\/a> ajusta des de 0,01 barg (DN15 a DN25).<\/li><li>La seva pressi\u00f3 de tarat supera els 15 barg: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-alleujament-de-pressio\/\">S3<\/a> arriba a 20 barg.<\/li><li>Prefereix una v\u00e0lvula sense membrana ni canonada de comandament: vegi la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-alleujament-de-pressio\/\">S3<\/a>, de c\u00e0rrega per molla.<\/li><li>Li n'hi ha prou amb DN15 a DN25 en inox: vegi la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv53\/\">PRV53<\/a> o la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv54\/\">PRV54<\/a> (vapor fins a 210 \u00b0C).<\/li><\/ul><\/aside><\/div><\/section><section id=\"especificaciones\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Especificacions t\u00e8cniques de la S1<\/h2><div class=\"wp-block-group vf-tbl-wrap is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-table vf-tbl\"><table><tbody><tr><th scope=\"row\">Tipus<\/th><td>Autoaccionada, de globus i seient simple, amb actuador de membrana<\/td><\/tr><tr><th scope=\"row\">Di\u00e0metres<\/th><td>DN15 a DN150<\/td><\/tr><tr><th scope=\"row\">Connexions<\/th><td>Brides EN PN16 a PN40 \u00b7 Brides ANSI 150 \/ 300 \u00b7 Rosca BSP o NPT de \u00bd\u2033 a 2\u2033 \u00b7 Extrems per soldar sota comanda<\/td><\/tr><tr><th scope=\"row\">Pressi\u00f3 nominal<\/th><td>PN25 \u2013 PN40 \u00b7 ANSI Classe 150 \u2013 Classe 300<\/td><\/tr><tr><th scope=\"row\">Rang de tarat<\/th><td>0,5 a 15 barg, segons l'actuador i les molles<\/td><\/tr><tr><th scope=\"row\">Pressi\u00f3 diferencial m\u00e0xima<\/th><td>16 bar (DN15\u2013DN50) \u00b7 12 bar (DN65\u2013DN80) \u00b7 10 bar (DN100)<\/td><\/tr><tr><th scope=\"row\">Coeficient Kv<\/th><td>De 3,5 m\u00b3\/h (DN15) a 240 m\u00b3\/h (DN150). Kv o Cv redu\u00eft sota comanda<\/td><\/tr><tr><th scope=\"row\">Temperatura segons la membrana<\/th><td>NBR: \u221220 a 80 \u00b0C \u00b7 EPDM: \u221240 a 125 \u00b0C \u00b7 EPDM + PTFE: 125 a 220 \u00b0C<\/td><\/tr><tr><th scope=\"row\">Temperatura segons el tancament<\/th><td>NBR: 80 \u00b0C \u00b7 EPDM o FPM: 150 \u00b0C \u00b7 PTFE + grafit: 220 \u00b0C<\/td><\/tr><tr><th scope=\"row\">Material del cos<\/th><td>Acer al carboni A216 WCB o acer inoxidable A351 CF3M. Sota comanda: bronze RG10, d\u00faplex o superd\u00faplex<\/td><\/tr><tr><th scope=\"row\">Interiors<\/th><td>Acer inoxidable AISI 316L. Manxa de doble capa d'acer inoxidable<\/td><\/tr><tr><th scope=\"row\">Presa de pressi\u00f3<\/th><td>Canonada de comandament exterior de 10 \u00d7 1 mm. Sota comanda, presa directa al cos per a tarats de m\u00e9s d'1 bar<\/td><\/tr><tr><th scope=\"row\">Tanc de condensaci\u00f3<\/th><td>Necessari per a vapor i per a l\u00edquids a m\u00e9s de 125 \u00b0C<\/td><\/tr><tr><th scope=\"row\">ATEX<\/th><td>II 2 GD c IIC Tx \/ c IIIC Tx\u00baC \u00b7 certificat LOM 14.034 U<\/td><\/tr><tr><th scope=\"row\">Directiva d'equips a pressi\u00f3<\/th><td>PED 2014\/68\/UE: la placa indica si requereix marcatge CE<\/td><\/tr><\/tbody><\/table><\/figure><\/div><h3 class=\"wp-block-heading\">Dimensions i pes<\/h3><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\"><\/th><th scope=\"col\">DN15<\/th><th scope=\"col\">DN20<\/th><th scope=\"col\">DN25<\/th><th scope=\"col\">DN32<\/th><th scope=\"col\">DN40<\/th><th scope=\"col\">DN50<\/th><th scope=\"col\">DN65<\/th><th scope=\"col\">DN80<\/th><th scope=\"col\">DN100<\/th><th scope=\"col\">DN125<\/th><th scope=\"col\">DN150<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">Kv (m\u00b3\/h)<\/th><td>3,5<\/td><td>5<\/td><td>9<\/td><td>13,5<\/td><td>22<\/td><td>32<\/td><td>57<\/td><td>82<\/td><td>115<\/td><td>190<\/td><td>240<\/td><\/tr><tr><th scope=\"row\">Longitud A (EN)<\/th><td>130<\/td><td>150<\/td><td>160<\/td><td>180<\/td><td>200<\/td><td>230<\/td><td>290<\/td><td>310<\/td><td>350<\/td><td>400<\/td><td>480<\/td><\/tr><tr><th scope=\"row\">Longitud A (ANSI 150)<\/th><td>\u2013<\/td><td>\u2013<\/td><td>184<\/td><td>\u2013<\/td><td>222<\/td><td>254<\/td><td>276<\/td><td>298,5<\/td><td>352,5<\/td><td>\u2013<\/td><td>451<\/td><\/tr><tr><th scope=\"row\">Longitud A (ANSI 300)<\/th><td>\u2013<\/td><td>\u2013<\/td><td>197<\/td><td>\u2013<\/td><td>235<\/td><td>267<\/td><td>292<\/td><td>317,5<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><th scope=\"row\">Al\u00e7ada L<\/th><td>440<\/td><td>445<\/td><td>450<\/td><td>455<\/td><td>463<\/td><td>475<\/td><td>560<\/td><td>560<\/td><td>575<\/td><td>600<\/td><td>640<\/td><\/tr><tr><th scope=\"row\">Pes (kg)<\/th><td>20<\/td><td>22<\/td><td>24<\/td><td>28<\/td><td>32<\/td><td>35<\/td><td>52<\/td><td>57<\/td><td>68<\/td><td>85<\/td><td>105<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Mides en mil\u00b7l\u00edmetres. DN150 EN: 450 mm sota comanda. Pl\u00e0nols acotats a la fitxa t\u00e8cnica.<\/p><h3 class=\"wp-block-heading\">Rangs de tarat i di\u00e0metre de l'actuador (mm)<\/h3><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\">Rang (barg)<\/th><th scope=\"col\">DN15 a DN50<\/th><th scope=\"col\">DN65 a DN100<\/th><th scope=\"col\">DN125 i DN150<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">0,5 \u2013 1,5<\/th><td>295<\/td><td>295<\/td><td>350<\/td><\/tr><tr><th scope=\"row\">1 \u2013 3<\/th><td>255<\/td><td>255<\/td><td>295<\/td><\/tr><tr><th scope=\"row\">2 \u2013 5<\/th><td>230<\/td><td>230<\/td><td>255<\/td><\/tr><tr><th scope=\"row\">4 \u2013 8<\/th><td>175<\/td><td>175<\/td><td>230<\/td><\/tr><tr><th scope=\"row\">7 \u2013 12<\/th><td>\u2013<\/td><td>175<\/td><td>175<\/td><\/tr><tr><th scope=\"row\">7 \u2013 15<\/th><td>175<\/td><td>Consultar<\/td><td>Consultar<\/td><\/tr><\/tbody><\/table><\/figure><\/div><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Especejament i materials (22 peces)<\/summary><div class=\"wp-block-group 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\">N\u00fam.<\/th><th scope=\"col\">Pe\u00e7a<\/th><th scope=\"col\">Material<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">1<\/th><td>Cos<\/td><td>A216 WCB (1.0619) \u00b7 A351 CF3M (1.4408) \u00b7 bronze RG10<\/td><\/tr><tr><th scope=\"row\">3, 39<\/th><td>Suports del tancament<\/td><td>Inox 316L (1.4404)<\/td><\/tr><tr><th scope=\"row\">6, 51<\/th><td>Tapes<\/td><td>Inox 316L; la 6 tamb\u00e9 en acer 1.1191<\/td><\/tr><tr><th scope=\"row\">8<\/th><td>Guia de la manxa<\/td><td>Acer 1.0570 o 1.1191, o inox 316L<\/td><\/tr><tr><th scope=\"row\">9, 22<\/th><td>Juntes t\u00f2riques<\/td><td>Viton<\/td><\/tr><tr><th scope=\"row\">10<\/th><td>Molles<\/td><td>Acer per a molles 55Si7 (1.0904)<\/td><\/tr><tr><th scope=\"row\">11<\/th><td>Rodament de boles<\/td><td>Acer 100Cr6 (1.3505)<\/td><\/tr><tr><th scope=\"row\">12, 34<\/th><td>Suports de molles<\/td><td>Acer 1.1191<\/td><\/tr><tr><th scope=\"row\">13<\/th><td>Femella de regulaci\u00f3<\/td><td>Acer 8.8<\/td><\/tr><tr><th scope=\"row\">14, 23, 24, 31, 32<\/th><td>Platina, plat i eix de membrana, columna i femella de la manxa<\/td><td>Acer 1.1191<\/td><\/tr><tr><th scope=\"row\">7, 15, 16, 17, 27, 50<\/th><td>Cargols i femelles<\/td><td>Acer 8.8 (cargols 7 i 50 tamb\u00e9 en inox A2)<\/td><\/tr><tr><th scope=\"row\">18<\/th><td>R\u00e0cord<\/td><td>Llaut\u00f3<\/td><\/tr><tr><th scope=\"row\">19<\/th><td>Membrana<\/td><td>EPDM o EPDM + PTFE<\/td><\/tr><tr><th scope=\"row\">20, 26<\/th><td>Actuador superior i inferior<\/td><td>Xapa d'acer 1.0335 amb pintura epoxi o inox AISI 316<\/td><\/tr><tr><th scope=\"row\">21, 29<\/th><td>Cargol de membrana i eix de regulaci\u00f3<\/td><td>Inox AISI 304 (1.4301)<\/td><\/tr><tr><th scope=\"row\">25, 25b, 42<\/th><td>Cargol i femelles<\/td><td>Inox A2<\/td><\/tr><tr><th scope=\"row\">28<\/th><td>Sistema antitorsi\u00f3<\/td><td>Acer 1.1191<\/td><\/tr><tr><th scope=\"row\">30<\/th><td>Guia del coixinet<\/td><td>Inox AISI 304L (1.4307)<\/td><\/tr><tr><th scope=\"row\">33<\/th><td>Manxa<\/td><td>Acer inoxidable<\/td><\/tr><tr><th scope=\"row\">35, 52<\/th><td>Juntes<\/td><td>Grafit amb metall<\/td><\/tr><tr><th scope=\"row\">40<\/th><td>Tancament<\/td><td>PTFE grafitat (altres sota comanda)<\/td><\/tr><tr><th scope=\"row\">45<\/th><td>Seient<\/td><td>Inox 316L (1.4404)<\/td><\/tr><\/tbody><\/table><\/figure><\/div><\/div><\/details><\/section><section id=\"funcionamiento\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Com funciona la S1<\/h2><p class=\"wp-block-paragraph\">La S1 treballa per equilibri de forces entre les molles de regulaci\u00f3 i la pressi\u00f3 d'entrada sobre la membrana.<\/p><ol class=\"vf-steps wp-block-list\"><li><b>Tarat.<\/b> Les molles (K) comprimeixen la membrana (H) amb la for\u00e7a que es fixa a la femella de regulaci\u00f3 (F).<\/li><li><b>V\u00e0lvula tancada.<\/b> Per sota del valor tarat, les molles mantenen l'obturador contra el seient.<\/li><li><b>Obertura proporcional.<\/b> La pressi\u00f3 d'entrada arriba a la membrana per la canonada de comandament (L). Si supera el valor tarat, la v\u00e0lvula s'obre en proporci\u00f3 a l'augment de pressi\u00f3.<\/li><li><b>Tancament.<\/b> Quan la pressi\u00f3 torna a baixar per sota del valor tarat, les molles tanquen la v\u00e0lvula.<\/li><li><b>Estanquitat de l'eix.<\/b> La manxa de doble capa (E) segella l'eix; un sistema antitorsi\u00f3 la protegeix.<\/li><\/ol><p class=\"wp-block-paragraph\">Una v\u00e0lvula d'exc\u00e9s no \u00e9s una v\u00e0lvula de seguretat: si necessita protecci\u00f3 contra sobrepressions, munti-hi, a m\u00e9s, una de les nostres <a href=\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/\">v\u00e0lvules de seguretat<\/a>. Vegi la difer\u00e8ncia entre v\u00e0lvula de seguretat i d'alleujament.<\/p><\/section><section id=\"instalacion\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Instal\u00b7laci\u00f3 de la S1<\/h2><p class=\"wp-block-paragraph\">El manual recomana muntar la S1 amb v\u00e0lvules d'interrupci\u00f3 a tots dos costats, filtre, man\u00f2metres d'entrada i de sortida i, si cal, tanc de condensaci\u00f3. Conv\u00e9 instal\u00b7lar-la en un bypass amb les seves v\u00e0lvules d'interrupci\u00f3, que torni a la canonada principal per darrere de la presa de pressi\u00f3.<\/p><h3 class=\"wp-block-heading\">Muntatge i posada en marxa<\/h3><ol class=\"vf-steps wp-block-list\"><li><b>Netegi la canonada i munti un filtre colador<\/b> davant de la v\u00e0lvula per protegir el tancament.<\/li><li><b>Respecti la fletxa del cos<\/b> i munti la v\u00e0lvula en canonada horitzontal (amb un lleuger pendent si hi ha condensats).<\/li><li><b>Posici\u00f3 de muntatge:<\/b> l'est\u00e0ndard, amb l'actuador per sota del cos, serveix per a qualsevol fluid a m\u00e9s de 0 \u00b0C; amb l'actuador per sobre, nom\u00e9s per a gasos i l\u00edquids fins a 80 \u00b0C. No es permeten altres posicions.<\/li><li><b>Subjecti la canonada, no la v\u00e0lvula<\/b> ni l'actuador: suports a prop de les brides.<\/li><li><b>Connecti la presa de control<\/b> a la canonada d'entrada, a 1 m com a m\u00ednim (o 10 \u00d7 DN), amb tub de 10 \u00d7 1 mm. Si la pressi\u00f3 oscil\u00b7la, afegeixi-hi una v\u00e0lvula d'agulla.<\/li><li><b>Tanc de condensaci\u00f3<\/b> amb vapor o l\u00edquids a m\u00e9s de 125 \u00b0C: al punt m\u00e9s alt, amb un lleuger pendent cap a la canonada i ple fins a vessar.<\/li><li><b>Posi en marxa a poc a poc:<\/b> amb l'agulla oberta i la instal\u00b7laci\u00f3 calenta, obri lentament l'a\u00efllament, primer a l'entrada.<\/li><li><b>Ajusti el tarat<\/b> amb la femella de regulaci\u00f3 (Valfonta la lliura preajustada). En comprimir la molla (gir horari) augmenta la pressi\u00f3 de tarat. Comprovi-ho al man\u00f2metre d'entrada.<\/li><\/ol><p class=\"wp-block-paragraph\">La instal\u00b7laci\u00f3 l'ha de fer personal especialitzat, sense superar la pressi\u00f3 i la temperatura de disseny; en zones ATEX, asseguri la conductivitat el\u00e8ctrica amb la instal\u00b7laci\u00f3. Vegi tamb\u00e9 la nostra guia de tarat de v\u00e0lvules d'alleujament.<\/p><\/section><section id=\"documentacion\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Documentaci\u00f3 t\u00e8cnica de la S1<\/h2><div class=\"wp-block-group vf-docs is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-doc vf-amb-enllac is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i>PDF<\/i><\/p><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><b>Fitxa t\u00e8cnica S1 (en angl\u00e8s)<\/b><span>PDF \u00b7 6 p\u00e0gines \u00b7 caracter\u00edstiques, especejament, dimensions i rangs de tarat<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/wp-content\/uploads\/2026\/10\/S1-18A-ENG.pdf\" aria-label=\"PDF Fitxa t\u00e8cnica S1 (en angl\u00e8s) PDF \u00b7 6 p\u00e0gines \u00b7 caracter\u00edstiques, especejament, dimensions i rangs de tarat\" target=\"_blank\" rel=\"noopener\"><\/a><\/p><\/div><div class=\"wp-block-group vf-doc vf-amb-enllac is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i>PDF<\/i><\/p><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><b>Manual de funcionament, instal\u00b7laci\u00f3 i manteniment<\/b><span>PDF \u00b7 17 p\u00e0gines \u00b7 muntatge, ATEX, avaries, especejament i recepci\u00f3<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/wp-content\/uploads\/2026\/10\/Manual-S1-18A-ESP.pdf\" aria-label=\"PDF Manual de funcionament, instal\u00b7laci\u00f3 i manteniment PDF \u00b7 17 p\u00e0gines \u00b7 muntatge, ATEX, avaries, especejament i recepci\u00f3\" target=\"_blank\" rel=\"noopener\"><\/a><\/p><\/div><\/div><p class=\"wp-block-paragraph\">Per demanar recanvis, indiqui el n\u00famero de s\u00e8rie (S\/N) de la placa. Certificats de comanda: vegi els nostres <a href=\"https:\/\/www.valfonta.com\/ca\/certificats\/\">certificats de qualitat<\/a>.<\/p><\/section><section id=\"comparar\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">La S1 comparada amb altres v\u00e0lvules d'exc\u00e9s de pressi\u00f3<\/h2><p class=\"wp-block-paragraph\">La gamma va de DN15 a DN150 i de 0,01 a 20 barg de tarat.<\/p><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\">Model<\/th><th scope=\"col\">DN<\/th><th scope=\"col\">PN<\/th><th scope=\"col\">Tarat (barg)<\/th><th scope=\"col\">T. m\u00e0x. (\u00b0C)<\/th><th scope=\"col\">Vapor<\/th><th scope=\"col\">Cos de s\u00e8rie<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv53\/\">PRV53<\/a><\/th><td>15 \u2013 25<\/td><td>25<\/td><td>0,5 \u2013 15<\/td><td>150<\/td><td>No<\/td><td>Inox CF3M<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv54\/\">PRV54<\/a><\/th><td>15 \u2013 25<\/td><td>25<\/td><td>0,5 \u2013 12<\/td><td>210<\/td><td>S\u00ed<\/td><td>Inox CF3M<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv55\/\">PRV55<\/a><\/th><td>15 \u2013 25<\/td><td>25<\/td><td>0,01 \u2013 8<\/td><td>150<\/td><td>S\u00ed<\/td><td>Inox CF3M<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-class=\"vf-cur\"><\/span>S1<\/th><td>15 \u2013 150<\/td><td>40<\/td><td>0,5 \u2013 15<\/td><td>220<\/td><td>S\u00ed<\/td><td>Acer al carboni o inox CF3M<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/\">S2<\/a><\/th><td>15 \u2013 100<\/td><td>40<\/td><td>0,02 \u2013 10<\/td><td>180<\/td><td>S\u00ed<\/td><td>Acer al carboni o inox CF3M<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-alleujament-de-pressio\/\">S3<\/a><\/th><td>15 \u2013 150<\/td><td>40<\/td><td>0,5 \u2013 20<\/td><td>220<\/td><td>S\u00ed<\/td><td>Acer al carboni o inox CF3M<\/td><\/tr><tr><th scope=\"row\">S4<\/th><td>15 \u2013 100<\/td><td>40<\/td><td>0,5 \u2013 20<\/td><td>220<\/td><td>S\u00ed<\/td><td>Acer al carboni o inox CF3M<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Dades del cat\u00e0leg resum de Valfonta (2025); tarat de la S2 segons la seva fitxa t\u00e8cnica. Totes admeten aigua, oli, aire i gasos no inflamables.<\/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 la S1<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>La S1 serveix com a v\u00e0lvula de seguretat?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">No. Nom\u00e9s s'ha de fer servir com a v\u00e0lvula d'alleujament de pressi\u00f3. Si la instal\u00b7laci\u00f3 necessita protecci\u00f3 contra sobrepressions, instal\u00b7li-hi, a m\u00e9s, un dispositiu de seguretat, com les nostres <a href=\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/\">v\u00e0lvules de seguretat<\/a>.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Es pot fer servir amb vapor?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">S\u00ed, fins a 220 \u00b0C amb membrana EPDM + PTFE. Cal instal\u00b7lar el tanc de condensaci\u00f3, que protegeix la membrana, i omplir-lo fins que vessi abans de la posada en marxa.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Com s&#x27;ajusta la pressi\u00f3 de tarat?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Amb la femella de regulaci\u00f3 i una eina est\u00e0ndard: en sentit horari es comprimeix la molla i augmenta la pressi\u00f3 de tarat. Valfonta la lliura preajustada al valor demanat per evitar un trencament prematur de la membrana.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Es pot instal\u00b7lar en una zona ATEX?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">S\u00ed. T\u00e9 categoria ATEX II 2 GD (certificat LOM 14.034 U) per a zones 1 i 2 (gasos, vapors i l\u00edquids inflamables) i 21 i 22 (pols combustible), segons la classe t\u00e8rmica que correspongui a la temperatura del fluid.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Quin manteniment necessita?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Revisi peri\u00f2dicament les juntes i les peces de desgast; la freq\u00fc\u00e8ncia dep\u00e8n de les condicions de servei. Es pot fer amb la v\u00e0lvula instal\u00b7lada, despressuritzada i a\u00efllada, i nom\u00e9s amb recanvis originals.<\/p><\/div><\/details><\/section><section id=\"relacionados\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Altres models de v\u00e0lvules d'exc\u00e9s de pressi\u00f3<\/h2><ul class=\"vf-rel wp-block-list\"><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-alleujament-de-pressio\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-alivio-presion-s3-s4-perspectiva-400.webp\" alt=\"V\u00e0lvula d&#x27;alleujament S3\" class=\"wp-image-10230\" width=\"300\" height=\"300\" loading=\"lazy\"><b>V\u00e0lvula d'alleujament S3<\/b><span>C\u00e0rrega per molla, fins a DN150 i 20 barg de tarat.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL.jpg\" alt=\"V\u00e0lvula d&#x27;exc\u00e9s S2\" class=\"wp-image-206\" width=\"300\" height=\"300\" loading=\"lazy\"><b>V\u00e0lvula d'exc\u00e9s S2<\/b><span>Membrana amb presa interna, DN15 a DN100.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv53\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV30-44.jpg\" alt=\"V\u00e0lvula d&#x27;exc\u00e9s PRV53\" class=\"wp-image-207\" width=\"300\" height=\"300\" loading=\"lazy\"><b>V\u00e0lvula d'exc\u00e9s PRV53<\/b><span>Inox CF3M, DN15 a DN25, tarat de 0,5 a 15 barg.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv54\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV30-44.jpg\" alt=\"V\u00e0lvula d&#x27;exc\u00e9s PRV54\" class=\"wp-image-207\" width=\"300\" height=\"300\" loading=\"lazy\"><b>V\u00e0lvula d'exc\u00e9s PRV54<\/b><span>Inox CF3M, DN15 a DN25, vapor fins a 210 \u00b0C.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv55\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV45-55.jpg\" alt=\"V\u00e0lvula d&#x27;exc\u00e9s PRV55\" class=\"wp-image-208\" width=\"300\" height=\"300\" loading=\"lazy\"><b>V\u00e0lvula d'exc\u00e9s PRV55<\/b><span>Tarats des de 0,01 barg, DN15 a DN25.<\/span><\/a><\/li><\/ul><\/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 de la S1<\/h2><p class=\"wp-block-paragraph\">Indiqui'ns les dades de la seva instal\u00b7laci\u00f3 i li recomanarem el di\u00e0metre, el Kv, l'actuador i la membrana adequats per a la seva pressi\u00f3 de tarat.<\/p><ul class=\"wp-block-list\"><li>Fluid i temperatura de servei<\/li><li>Pressi\u00f3 de tarat i pressi\u00f3 normal de servei<\/li><li>Cabal que ha de descarregar la v\u00e0lvula<\/li><li>Di\u00e0metre, material del cos i tipus de connexi\u00f3<\/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-f588-o1\" lang=\"ca\" dir=\"ltr\" data-wpcf7-id=\"588\">\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\/product\/787#wpcf7-f588-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=\"588\" \/><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-f588-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=\"1792703033.dcb93af8211681b0\" \/>\n<\/fieldset>\n<input class=\"wpcf7-form-control wpcf7-hidden\" value=\"S1\" type=\"hidden\" name=\"modelo\" \/><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><fieldset><legend>Dades de l'aplicaci\u00f3 (opcional)<\/legend><label>Di\u00e0metre<span class=\"wpcf7-form-control-wrap\" data-name=\"dn\"><select class=\"wpcf7-form-control wpcf7-select\" aria-invalid=\"false\" name=\"dn\"><option value=\"\">Seleccioni<\/option><option value=\"DN15 (\u00bd\u2033)\">DN15 (\u00bd\u2033)<\/option><option value=\"DN20 (\u00be\u2033)\">DN20 (\u00be\u2033)<\/option><option value=\"DN25 (1\u2033)\">DN25 (1\u2033)<\/option><option value=\"DN32 (1\u00bc\u2033)\">DN32 (1\u00bc\u2033)<\/option><option value=\"DN40 (1\u00bd\u2033)\">DN40 (1\u00bd\u2033)<\/option><option value=\"DN50 (2\u2033)\">DN50 (2\u2033)<\/option><option value=\"DN65\">DN65<\/option><option value=\"DN80\">DN80<\/option><option value=\"DN100\">DN100<\/option><option value=\"DN125\">DN125<\/option><option value=\"DN150\">DN150<\/option><option value=\"No ho s\u00e9\">No ho s\u00e9<\/option><\/select><\/span><\/label><label>Fluid<span class=\"wpcf7-form-control-wrap\" data-name=\"fluido\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"vapor, aigua, aire comprimit\u2026\" value=\"\" type=\"text\" name=\"fluido\" \/><\/span><\/label><label>Pressi\u00f3 de tarat (barg)<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>Pressi\u00f3 de servei (barg)<span class=\"wpcf7-form-control-wrap\" data-name=\"p_servicio\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"p_servicio\" \/><\/span><\/label><label>Cabal a descarregar<span class=\"wpcf7-form-control-wrap\" data-name=\"caudal\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"p. ex. 10 m\u00b3\/h o kg\/h de vapor\" value=\"\" type=\"text\" name=\"caudal\" \/><\/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><\/fieldset><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>","protected":false},"excerpt":{"rendered":"<p>Inici\u203aV\u00e0lvules d'alleujament de pressi\u00f3\u203aV\u00e0lvula d'exc\u00e9s de pressi\u00f3 S1 V\u00e0lvula d'exc\u00e9s de pressi\u00f3 \u00b7 Membrana i manxa V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S1 Fins a DN150 V\u00e0lvula d'exc\u00e9s de pressi\u00f3 autoaccionada, de seient simple, amb actuador de membrana i eix segellat per manxa d'inox. Limita la pressi\u00f3 d'entrada al valor tarat, de 0,5 a 15 barg, en ... <a title=\"V\u00e0lvula d&#039;exc\u00e9s de pressi\u00f3 S1\" class=\"read-more\" href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio\/\" aria-label=\"M\u00e9s informaci\u00f3 sobre V\u00e0lvula d&#039;exc\u00e9s de pressi\u00f3 S1\">Llegiu m\u00e9s<\/a><\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false,"_generate-full-width-content":"true","_generate-disable-headline":"true","rank_math_title":"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S1 fins a DN150 | Valfonta","rank_math_description":"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S1 autoaccionada, amb membrana i manxa d'estanquitat. DN15 a DN150, PN25\u2013PN40, tarat de 0,5 a 15 barg, vapor fins a 220 \u00b0C.","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. 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Limita la pressi\u00f3 d'entrada al valor tarat, de 0,5 a 15 barg, en vapor, aire comprimit, gasos i l\u00edquids, de DN15 a DN150.\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Valfonta\"},\"manufacturer\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"model\":\"S1\",\"image\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M1-S1-3D-700x700-1.jpg\",\"material\":\"Acer al carboni A216 WCB o acer inoxidable A351 CF3M\",\"additionalProperty\":[{\"@type\":\"PropertyValue\",\"name\":\"Tipus\",\"value\":\"Autoaccionada, de globus i seient simple, amb actuador de membrana\"},{\"@type\":\"PropertyValue\",\"name\":\"Di\u00e0metres\",\"value\":\"DN15 a DN150\"},{\"@type\":\"PropertyValue\",\"name\":\"Connexions\",\"value\":\"Brides EN PN16 a PN40 \u00b7 Brides ANSI 150 \/ 300 \u00b7 Rosca BSP o NPT de \u00bd\u2033 a 2\u2033 \u00b7 Extrems per soldar sota comanda\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressi\u00f3 nominal\",\"value\":\"PN25 \u2013 PN40 \u00b7 ANSI Classe 150 \u2013 Classe 300\"},{\"@type\":\"PropertyValue\",\"name\":\"Rang de tarat\",\"value\":\"0,5 a 15 barg, segons l'actuador i les molles\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressi\u00f3 diferencial m\u00e0xima\",\"value\":\"16 bar (DN15\u2013DN50) \u00b7 12 bar (DN65\u2013DN80) \u00b7 10 bar (DN100)\"},{\"@type\":\"PropertyValue\",\"name\":\"Coeficient Kv\",\"value\":\"De 3,5 m\u00b3\/h (DN15) a 240 m\u00b3\/h (DN150). 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Si la instal\u00b7laci\u00f3 necessita protecci\u00f3 contra sobrepressions, instal\u00b7li-hi, a m\u00e9s, un dispositiu de seguretat, com les nostres v\u00e0lvules de seguretat.\"}},{\"@type\":\"Question\",\"name\":\"Es pot fer servir amb vapor?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"S\u00ed, fins a 220 \u00b0C amb membrana EPDM + PTFE. Cal instal\u00b7lar el tanc de condensaci\u00f3, que protegeix la membrana, i omplir-lo fins que vessi abans de la posada en marxa.\"}},{\"@type\":\"Question\",\"name\":\"Com s'ajusta la pressi\u00f3 de tarat?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Amb la femella de regulaci\u00f3 i una eina est\u00e0ndard: en sentit horari es comprimeix la molla i augmenta la pressi\u00f3 de tarat. Valfonta la lliura preajustada al valor demanat per evitar un trencament prematur de la membrana.\"}},{\"@type\":\"Question\",\"name\":\"Es pot instal\u00b7lar en una zona ATEX?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"S\u00ed. T\u00e9 categoria ATEX II 2 GD (certificat LOM 14.034 U) per a zones 1 i 2 (gasos, vapors i l\u00edquids inflamables) i 21 i 22 (pols combustible), segons la classe t\u00e8rmica que correspongui a la temperatura del fluid.\"}},{\"@type\":\"Question\",\"name\":\"Quin manteniment necessita?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Revisi peri\u00f2dicament les juntes i les peces de desgast; la freq\u00fc\u00e8ncia dep\u00e8n de les condicions de servei. Es pot fer amb la v\u00e0lvula instal\u00b7lada, despressuritzada i a\u00efllada, i nom\u00e9s amb recanvis originals.\"}}]}]}]"},"product_brand":[],"product_cat":[80],"product_tag":[],"class_list":["post-787","product","type-product","status-publish","product_cat-uncategorized","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product\/787","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/media?parent=787"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_brand?post=787"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_cat?post=787"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_tag?post=787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}