{"id":792,"date":"2026-10-02T13:17:46","date_gmt":"2026-10-02T11:17:46","guid":{"rendered":"https:\/\/www.valfonta.com\/producto\/valvula-reductora-de-pressio-s2\/"},"modified":"2026-10-22T09:23:59","modified_gmt":"2026-10-22T07:23:59","slug":"valvula-reductora-de-pressio-s2","status":"publish","type":"product","link":"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/","title":{"rendered":"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S2"},"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 S2<\/span><\/p><\/nav><article class=\"wp-block-group vf-pdp vfd-model--S2 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<\/p><h1 class=\"wp-block-heading\">V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S2<\/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\">Presa interna<\/span><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\" alt=\"V\u00e0lvula d&#x27;exc\u00e9s de pressi\u00f3 S2 de Valfonta amb actuador de membrana i connexi\u00f3 per brides\" class=\"wp-image-193\" 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 autoreguladora d'acci\u00f3 directa, amb actuador de membrana i presa de pressi\u00f3 interna. Mant\u00e9 la pressi\u00f3 d'entrada al valor m\u00e0xim ajustat, de 0,02 a 10 barg, en aire comprimit, gasos, l\u00edquids i vapor a baixa temperatura.<\/p><ul class=\"vf-pdp-keys wp-block-list\"><li><span>Di\u00e0metres<\/span><b>DN15 a DN100<\/b><\/li><li><span>Pressi\u00f3 nominal<\/span><b>PN16 a PN40 <small>Classe 150 \u2013 300<\/small><\/b><\/li><li><span>Rang de tarat<\/span><b>0,02 a 10 barg <small>fins a 16, consultar<\/small><\/b><\/li><li><span>Temperatura<\/span><b>fins a 180 \u00b0C <small>amb PTFE i tanc<\/small><\/b><\/li><li><span>Kv<\/span><b>3,5 a 115 m\u00b3\/h<\/b><\/li><li><span>Presa de pressi\u00f3<\/span><b>Interna <small>externa per a vapor<\/small><\/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\/S2-18A-ESP.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>Membrana refor\u00e7ada amb tela interm\u00e8dia<\/li><li>Recanvis recomanats identificats a l'especejament<\/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 S2<\/h2><p class=\"wp-block-paragraph\">La <strong>S2<\/strong> \u00e9s una <a href=\"https:\/\/www.valfonta.com\/ca\/valvules-alleujament-de-pressio\/\">v\u00e0lvula d'exc\u00e9s de pressi\u00f3<\/a> que mant\u00e9 la pressi\u00f3 aig\u00fces amunt: mentre la pressi\u00f3 d'entrada \u00e9s per sota del valor ajustat roman tancada i, quan el supera, s'obre en proporci\u00f3 a l'augment de pressi\u00f3 per alleujar l'exc\u00e9s. Treballa per acci\u00f3 directa, sense energia auxiliar.<\/p><p class=\"wp-block-paragraph\">De s\u00e8rie porta <strong>presa de pressi\u00f3 interna<\/strong>, de manera que en gasos i l\u00edquids no necessita canonada de comandament exterior. Amb els seus diferents actuadors permet tarats molt baixos, des de 0,02 barg. 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>Manteniment de pressi\u00f3<\/b><span>Mant\u00e9 la pressi\u00f3 aig\u00fces amunt al valor m\u00e0xim ajustat.<\/span><\/li><li><b>Alimentaci\u00f3 entre zones<\/b><span>Permet que una zona amb exc\u00e9s de pressi\u00f3 n'alimenti una altra de menys pressi\u00f3 sense desproveir la l\u00ednia principal.<\/span><\/li><li><b>Control de gasos<\/b><span>Especialment indicada per a gasos entre \u221210 i +80 \u00b0C.<\/span><\/li><li><b>Aire comprimit i l\u00edquids<\/b><span>Alleujament proporcional cap a una l\u00ednia de reciclatge o de retorn.<\/span><\/li><li><b>Vapor a baixa temperatura<\/b><span>Amb presa de pressi\u00f3 externa i tanc de condensaci\u00f3.<\/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 S2 si\u2026<\/h3><ul class=\"vf-si wp-block-list\"><li>Necessita tarats baixos, des de 0,02 barg.<\/li><li>Treballa amb gasos, aire comprimit o l\u00edquids i prefereix no muntar canonada de comandament.<\/li><li>Els seus di\u00e0metres van de DN15 a DN100.<\/li><li>La temperatura no supera els 180 \u00b0C.<\/li><\/ul><h3 class=\"wp-block-heading\">Millor un altre model si\u2026<\/h3><ul class=\"vf-no wp-block-list\"><li>Treballa amb vapor o l\u00edquids a m\u00e9s de 180 \u00b0C: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio\/\">S1<\/a> i la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-alleujament-de-pressio\/\">S3<\/a> arriben a 220 \u00b0C.<\/li><li>Necessita DN125 o DN150: vegi la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio\/\">S1<\/a> o la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-alleujament-de-pressio\/\">S3<\/a>.<\/li><li>La seva pressi\u00f3 de tarat supera els 10 barg: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-alleujament-de-pressio\/\">S3<\/a> arriba a 20 barg.<\/li><li>Li n'hi ha prou amb DN15 a DN25 en acer inoxidable: vegi la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv55\/\">PRV55<\/a>, des de 0,01 barg.<\/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 S2<\/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>Autoreguladora, d'acci\u00f3 directa, amb actuador de membrana i tancament equilibrat per \u00e8mbol de compensaci\u00f3<\/td><\/tr><tr><th scope=\"row\">Di\u00e0metres<\/th><td>DN15 a DN100<\/td><\/tr><tr><th scope=\"row\">Connexions<\/th><td>Brides EN PN16, PN25 i PN40 \u00b7 Brides ANSI 150 \/ 300 \u00b7 Rosca BSP o NPT fins a 2\u2033<\/td><\/tr><tr><th scope=\"row\">Pressi\u00f3 nominal<\/th><td>PN16 \u2013 PN25 \u2013 PN40 \u00b7 ANSI Classe 150 \u2013 Classe 300<\/td><\/tr><tr><th scope=\"row\">Rang de tarat<\/th><td>0,02 a 10 barg segons l'actuador i la molla (fins a 16 barg, consultar)<\/td><\/tr><tr><th scope=\"row\">Pressi\u00f3 m\u00e0xima d'entrada<\/th><td>10 barg (fins a 16 barg, consultar)<\/td><\/tr><tr><th scope=\"row\">Pressi\u00f3 diferencial m\u00e0xima<\/th><td>16 bar de DN15 a DN50<\/td><\/tr><tr><th scope=\"row\">Coeficient Kv<\/th><td>De 3,5 m\u00b3\/h (DN15) a 115 m\u00b3\/h (DN100). Kv 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 PTFE: fins a 180 \u00b0C amb tanc de condensaci\u00f3 \u00b7 FKM: consultar<\/td><\/tr><tr><th scope=\"row\">Temperatura segons el tancament<\/th><td>NBR: 80 \u00b0C \u00b7 EPDM: 125 \u00b0C \u00b7 FPM: 150 \u00b0C \u00b7 PTFE + grafit: 180 \u00b0C<\/td><\/tr><tr><th scope=\"row\">Material del cos<\/th><td>Acer al carboni WCB (1.0619) o acer inoxidable CF3M (1.4408). Sota comanda: bronze RG10, d\u00faplex o superd\u00faplex<\/td><\/tr><tr><th scope=\"row\">Interiors<\/th><td>Acer inoxidable AISI 316L<\/td><\/tr><tr><th scope=\"row\">Presa de pressi\u00f3<\/th><td>Interna de s\u00e8rie. Externa sota comanda, obligat\u00f2ria per a vapor i per a l\u00edquids a m\u00e9s de 125 \u00b0C<\/td><\/tr><tr><th scope=\"row\">Construccions especials<\/th><td>Actuador d'acer inoxidable \u00b7 Kv redu\u00eft \u00b7 Tap de protecci\u00f3 de l'eix de regulaci\u00f3<\/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><\/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><\/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><\/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><\/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><\/tr><tr><th scope=\"row\">Al\u00e7ada L<\/th><td>345<\/td><td>345<\/td><td>320<\/td><td>320<\/td><td>375<\/td><td>375<\/td><td>405<\/td><td>490<\/td><td>505<\/td><\/tr><tr><th scope=\"row\">Al\u00e7ada L amb tap<\/th><td>360<\/td><td>360<\/td><td>335<\/td><td>335<\/td><td>390<\/td><td>390<\/td><td>420<\/td><td>505<\/td><td>520<\/td><\/tr><tr><th scope=\"row\">Pes (kg)<\/th><td>20<\/td><td>20<\/td><td>22<\/td><td>23<\/td><td>25<\/td><td>28<\/td><td>43<\/td><td>53<\/td><td>60<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Mides en mil\u00b7l\u00edmetres. Pl\u00e0nols acotats a la fitxa t\u00e8cnica en PDF.<\/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 i DN20<\/th><th scope=\"col\">DN25 i DN32<\/th><th scope=\"col\">DN40 i DN50<\/th><th scope=\"col\">DN65<\/th><th scope=\"col\">DN80<\/th><th scope=\"col\">DN100<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">0,02 \u2013 0,05<\/th><td>350<\/td><td>350<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><th scope=\"row\">0,03 \u2013 0,1<\/th><td>295<\/td><td>295<\/td><td>350<\/td><td>350<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><th scope=\"row\">0,1 \u2013 1<\/th><td>295<\/td><td>295<\/td><td>295<\/td><td>295<\/td><td>295<\/td><td>295<\/td><\/tr><tr><th scope=\"row\">0,2 \u2013 2<\/th><td>230<\/td><td>230<\/td><td>230<\/td><td>230<\/td><td>295<\/td><td>295<\/td><\/tr><tr><th scope=\"row\">1,5 \u2013 4<\/th><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>175<\/td><td>230<\/td><td>230<\/td><\/tr><tr><th scope=\"row\">1 \u2013 6<\/th><td>175<\/td><td>175<\/td><td>175<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><th scope=\"row\">3 \u2013 6<\/th><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>175<\/td><td>230<\/td><td>230<\/td><\/tr><tr><th scope=\"row\">3 \u2013 10<\/th><td>175<\/td><td>175<\/td><td>175<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><th scope=\"row\">4 \u2013 12<\/th><td>175<\/td><td>175<\/td><td>175<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><\/tbody><\/table><\/figure><\/div><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Especejament i materials (20 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>Acer al carboni 1.0619 (WCB) \u00b7 inox 1.4408 (CF3M) \u00b7 bronze RG10<\/td><\/tr><tr><th scope=\"row\">2, 3, 30<\/th><td>Casquet i suports del tancament<\/td><td>Inox 1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">4<\/th><td>Cargols<\/td><td>Acer 8.8 o inox A2-70<\/td><\/tr><tr><th scope=\"row\">5<\/th><td>Junta<\/td><td>PTFE<\/td><\/tr><tr><th scope=\"row\">6, 7, 14, 16, 20, 29<\/th><td>Cargols, femelles i volandera de seguretat<\/td><td>Inox A2-70<\/td><\/tr><tr><th scope=\"row\">8, 21<\/th><td>Actuador superior i inferior<\/td><td>Xapa d'acer 1.0335 amb pintura epoxi o inox AISI 316L<\/td><\/tr><tr><th scope=\"row\">9<\/th><td>Suport de la molla<\/td><td>Xapa d'acer galvanitzada 1.0035<\/td><\/tr><tr><th scope=\"row\">10<\/th><td>Molla de regulaci\u00f3<\/td><td>Acer 52SiCrNi5 amb epoxi<\/td><\/tr><tr><th scope=\"row\">11<\/th><td>Femella de regulaci\u00f3<\/td><td>Acer 8.8 galvanitzat<\/td><\/tr><tr><th scope=\"row\">12<\/th><td>Coixinet<\/td><td>PTFE + grafit<\/td><\/tr><tr><th scope=\"row\">13, 18<\/th><td>Eix de regulaci\u00f3 i eix<\/td><td>Inox 1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">15<\/th><td>Junta t\u00f2rica<\/td><td>NBR, FKM o EPDM<\/td><\/tr><tr><th scope=\"row\">19<\/th><td>Membrana<\/td><td>NBR, EPDM o FKM (PTFE com a opci\u00f3)<\/td><\/tr><tr><th scope=\"row\">22, 23, 27<\/th><td>Plat inferior de membrana, guia de l'\u00e8mbol i bonet<\/td><td>Inox 1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">24<\/th><td>Tapa<\/td><td>Acer galvanitzat 1.1141<\/td><\/tr><tr><th scope=\"row\">25<\/th><td>Junta<\/td><td>Grafit<\/td><\/tr><tr><th scope=\"row\">26<\/th><td>\u00c8mbol de compensaci\u00f3<\/td><td>NBR, FKM, EPDM o PTFE + grafit<\/td><\/tr><tr><th scope=\"row\">28<\/th><td>Tancament<\/td><td>NBR, FKM, EPDM o PTFE + grafit<\/td><\/tr><tr><th scope=\"row\">41, 43, 44<\/th><td>Eix del casquet inferior, volandera i cargols (DN100)<\/td><td>Inox 316L i A2-70<\/td><\/tr><tr><th scope=\"row\">42<\/th><td>Junta t\u00f2rica (DN100)<\/td><td>NBR, FKM o EPDM<\/td><\/tr><\/tbody><\/table><\/figure><\/div><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Recanvis recomanats<\/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\">Refer\u00e8ncia<\/th><th scope=\"col\">Descripci\u00f3<\/th><th scope=\"col\">Peces<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">\u2014<\/th><td>Membrana<\/td><td>19<\/td><\/tr><tr><th scope=\"row\">\u2014<\/th><td>Tancament i \u00e8mbol de compensaci\u00f3<\/td><td>26 i 28<\/td><\/tr><tr><th scope=\"row\">\u2014<\/th><td>Juntes i juntes t\u00f2riques<\/td><td>5, 15, 25 i 42 (DN100)<\/td><\/tr><tr><th scope=\"row\">\u2014<\/th><td>Coixinet<\/td><td>12<\/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 S2<\/h2><p class=\"wp-block-paragraph\">La S2 equilibra la pressi\u00f3 d'entrada sobre la membrana amb la for\u00e7a de la molla de regulaci\u00f3.<\/p><ol class=\"vf-steps wp-block-list\"><li><b>Detecci\u00f3.<\/b> La pressi\u00f3 d'entrada (p1) arriba a l'actuador per la presa interna o, sota comanda, per una presa externa.<\/li><li><b>V\u00e0lvula tancada.<\/b> Mentre la for\u00e7a d'aquesta pressi\u00f3 \u00e9s inferior a la de la molla, el tancament roman sobre el seient.<\/li><li><b>Obertura proporcional.<\/b> Quan la supera, la v\u00e0lvula s'obre en proporci\u00f3 a l'augment de pressi\u00f3 i alleuja l'exc\u00e9s de fluid.<\/li><li><b>Tancament equilibrat.<\/b> L'\u00e8mbol de compensaci\u00f3 equilibra les forces sobre el tancament, i la molla torna a tancar la v\u00e0lvula quan la pressi\u00f3 baixa.<\/li><li><b>Tarat.<\/b> La for\u00e7a de la molla s'ajusta amb l'eix de regulaci\u00f3 (13).<\/li><\/ol><p class=\"wp-block-paragraph\">No s'ha d'utilitzar mai com a accessori de seguretat. Si la instal\u00b7laci\u00f3 necessita protecci\u00f3 contra sobrepressions, munti-hi tamb\u00e9 una de les nostres <a href=\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/\">v\u00e0lvules de seguretat<\/a>.<\/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 S2<\/h2><p class=\"wp-block-paragraph\">L'esquema recomanat pel fabricant munta la S2 en una derivaci\u00f3 de la l\u00ednia principal, entre v\u00e0lvules d'a\u00efllament i amb filtre, que descarrega l'exc\u00e9s a una l\u00ednia de reciclatge. Un man\u00f2metre permet comprovar la pressi\u00f3 d'entrada.<\/p><div class=\"wp-block-group vf-diagram vf-s-7307c0 vf-t-figure is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-svgw is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><svg viewbox=\"0 0 900 240\" role=\"img\" aria-label=\"Esquema d'instal\u00b7laci\u00f3 d'una v\u00e0lvula d'alleujament o d'exc\u00e9s de pressi\u00f3 en derivaci\u00f3\"><path d=\"M20 90 H880\" stroke=\"#9aa0a6\" stroke-width=\"6\" fill=\"none\"><\/path><path d=\"M865 90 l14 0 -10 -7 m10 7 -10 7\" stroke=\"#1e2123\" stroke-width=\"3\" fill=\"none\"><\/path><rect x=\"60\" y=\"62\" width=\"90\" height=\"56\" rx=\"4\" fill=\"#fff\" stroke=\"#1e2123\" stroke-width=\"2\"><\/rect><circle cx=\"105\" cy=\"90\" r=\"16\" fill=\"none\" stroke=\"#1e2123\" stroke-width=\"2\"><\/circle><path d=\"M97 90 l18 0\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><path d=\"M420 90 V150\" stroke=\"#9aa0a6\" stroke-width=\"5\"><\/path><rect x=\"385\" y=\"150\" width=\"70\" height=\"46\" rx=\"4\" fill=\"#fdecf1\" stroke=\"#e6305d\" stroke-width=\"2\"><\/rect><path d=\"M420 160 v24 m-7 -8 7 8 7 -8\" stroke=\"#e6305d\" stroke-width=\"2.5\" fill=\"none\"><\/path><path d=\"M455 173 H640 V215\" stroke=\"#9aa0a6\" stroke-width=\"5\" fill=\"none\"><\/path><path d=\"M632 205 l8 12 8 -12\" stroke=\"#1e2123\" stroke-width=\"2.5\" fill=\"none\"><\/path><g><circle cx=\"300\" cy=\"51\" r=\"13\" fill=\"#fff\" stroke=\"#1e2123\" stroke-width=\"2\"><\/circle><line x1=\"300\" y1=\"64\" x2=\"300\" y2=\"90\" stroke=\"#1e2123\" stroke-width=\"2\"><\/line><line x1=\"300\" y1=\"51\" x2=\"307\" y2=\"44\" stroke=\"#e6305d\" stroke-width=\"2\"><\/line><\/g><rect x=\"720\" y=\"65\" width=\"110\" height=\"50\" rx=\"4\" fill=\"#fff\" stroke=\"#1e2123\" stroke-width=\"2\"><\/rect><circle cx=\"105\" cy=\"138\" r=\"11\" fill=\"#1e2123\"><\/circle><text x=\"105\" y=\"142\" font-size=\"12\" font-weight=\"700\" fill=\"#fff\" text-anchor=\"middle\" font-family=\"Montserrat,Arial\">1<\/text><circle cx=\"324\" cy=\"38\" r=\"11\" fill=\"#1e2123\"><\/circle><text x=\"324\" y=\"42\" font-size=\"12\" font-weight=\"700\" fill=\"#fff\" text-anchor=\"middle\" font-family=\"Montserrat,Arial\">2<\/text><circle cx=\"420\" cy=\"218\" r=\"11\" fill=\"#e6305d\"><\/circle><text x=\"420\" y=\"222\" font-size=\"12\" font-weight=\"700\" fill=\"#fff\" text-anchor=\"middle\" font-family=\"Montserrat,Arial\">3<\/text><circle cx=\"640\" cy=\"232\" r=\"11\" fill=\"#1e2123\"><\/circle><text x=\"640\" y=\"236\" font-size=\"12\" font-weight=\"700\" fill=\"#fff\" text-anchor=\"middle\" font-family=\"Montserrat,Arial\">4<\/text><circle cx=\"775\" cy=\"136\" r=\"11\" fill=\"#1e2123\"><\/circle><text x=\"775\" y=\"140\" font-size=\"12\" font-weight=\"700\" fill=\"#fff\" text-anchor=\"middle\" font-family=\"Montserrat,Arial\">5<\/text><\/svg><\/p><\/div><div class=\"wp-block-group vf-t-figcaption is-layout-flow wp-block-group-is-layout-flow\"><ol class=\"wp-block-list\"><li>L\u00ednia principal (bomba o equip que genera la pressi\u00f3)<\/li><li>Man\u00f2metre de pressi\u00f3 d'entrada<\/li><li>V\u00e0lvula d'exc\u00e9s S2, amb v\u00e0lvules d'a\u00efllament i filtre<\/li><li>Desc\u00e0rrega a reciclatge o retorn<\/li><li>Consum<\/li><\/ol><\/div><\/div><h3 class=\"wp-block-heading\">Muntatge i posada en marxa<\/h3><ol class=\"vf-steps wp-block-list\"><li><b>Netegi la canonada i instal\u00b7li un filtre colador<\/b> a l'entrada: protegeix el tancament i redueix el manteniment.<\/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> utilitzi la posici\u00f3 est\u00e0ndard del manual per a qualsevol fluid a m\u00e9s de 0 \u00b0C; l'alternativa nom\u00e9s serveix per a gasos i l\u00edquids fins a 80 \u00b0C. No es recomanen 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>Presa de control:<\/b> amb vapor o l\u00edquids a m\u00e9s de 125 \u00b0C, demani la v\u00e0lvula amb presa externa i connecti-la a l'entrada, a 1 m com a m\u00ednim (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> per a vapor i l\u00edquids a m\u00e9s de 125 \u00b0C: al punt m\u00e9s alt i ple fins a vessar.<\/li><li><b>Posi en marxa a poc a poc:<\/b> obri lentament les v\u00e0lvules d'a\u00efllament per evitar cops d'ariet.<\/li><li><b>Ajusti el tarat<\/b> amb l'eix 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\">Si la pressi\u00f3 oscil\u00b7la, revisi el punt de presa i el dimensionament (Kvs, di\u00e0metre o actuador). L'ajudem amb el tarat de v\u00e0lvules d'alleujament i amb el chattering en 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 S2<\/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 S2<\/b><span>PDF \u00b7 5 p\u00e0gines \u00b7 caracter\u00edstiques, especejament, dimensions i instal\u00b7laci\u00f3<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/wp-content\/uploads\/2026\/10\/S2-18A-ESP.pdf\" aria-label=\"PDF Fitxa t\u00e8cnica S2 PDF \u00b7 5 p\u00e0gines \u00b7 caracter\u00edstiques, especejament, dimensions i instal\u00b7laci\u00f3\" 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 16 p\u00e0gines \u00b7 muntatge, ATEX, avaries 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-S2-18A-ESP.pdf\" aria-label=\"PDF Manual de funcionament, instal\u00b7laci\u00f3 i manteniment PDF \u00b7 16 p\u00e0gines \u00b7 muntatge, ATEX, avaries 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 S2 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\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio\/\">S1<\/a><\/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\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-class=\"vf-cur\"><\/span>S2<\/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 S2<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>La S2 \u00e9s una 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. \u00c9s un accessori de pressi\u00f3 que alleuja l'exc\u00e9s de manera proporcional. Si la instal\u00b7laci\u00f3 necessita protecci\u00f3 contra sobrepressions, cal instal\u00b7lar-hi tamb\u00e9 una <a href=\"https:\/\/www.valfonta.com\/ca\/valvules-de-seguretat\/\">v\u00e0lvula de seguretat<\/a>.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Necessita canonada de comandament exterior?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">No, de s\u00e8rie porta presa de pressi\u00f3 interna. Nom\u00e9s cal presa externa amb vapor o amb l\u00edquids a m\u00e9s de 125 \u00b0C, connectada a 1 m de l'entrada com a m\u00ednim, o si es demana expressament.<\/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, amb vapor a baixa temperatura. S'ha de demanar amb presa de pressi\u00f3 externa i tanc de condensaci\u00f3, que protegeix la membrana del sobreescalfament. Amb membrana de PTFE i tanc treballa fins a 180 \u00b0C.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Quina pressi\u00f3 de tarat admet?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">De 0,02 a 10 barg, segons l'actuador i la molla; fins a 16 barg, consultar. Per a 0,02 a 0,05 barg s'utilitza l'actuador de 350 mm (DN15 a DN32).<\/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-exces-de-pressio\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M1-S1-3D.jpg\" alt=\"V\u00e0lvula d&#x27;exc\u00e9s S1\" class=\"wp-image-205\" width=\"300\" height=\"300\" loading=\"lazy\"><b>V\u00e0lvula d'exc\u00e9s S1<\/b><span>Membrana i manxa, fins a DN150 i 220 \u00b0C.<\/span><\/a><\/li><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-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 S2<\/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-f593-o1\" lang=\"ca\" dir=\"ltr\" data-wpcf7-id=\"593\">\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\/792#wpcf7-f593-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=\"593\" \/><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-f593-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=\"1792703025.1e18264ac0cddf34\" \/>\n<\/fieldset>\n<input class=\"wpcf7-form-control wpcf7-hidden\" value=\"S2\" 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=\"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=\"aire comprimit, gas, aigua\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. 50 Nm\u00b3\/h o 5 m\u00b3\/h\" 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 S2 V\u00e0lvula d'exc\u00e9s de pressi\u00f3 \u00b7 Membrana V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S2 Presa interna V\u00e0lvula d'exc\u00e9s de pressi\u00f3 autoreguladora d'acci\u00f3 directa, amb actuador de membrana i presa de pressi\u00f3 interna. Mant\u00e9 la pressi\u00f3 d'entrada al valor m\u00e0xim ajustat, de 0,02 a 10 barg, en aire comprimit, gasos, l\u00edquids ... <a title=\"V\u00e0lvula d&#039;exc\u00e9s de pressi\u00f3 S2\" class=\"read-more\" href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/\" aria-label=\"M\u00e9s informaci\u00f3 sobre V\u00e0lvula d&#039;exc\u00e9s de pressi\u00f3 S2\">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 S2 de membrana | Valfonta","rank_math_description":"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S2 de membrana i acci\u00f3 directa, amb presa interna. DN15 a DN100, tarat de 0,02 a 10 barg i fins a 180 \u00b0C amb tanc.","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\":\"ItemPage\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/#webpage\",\"url\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/\",\"name\":\"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S2 de membrana | Valfonta\",\"description\":\"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S2 de membrana i acci\u00f3 directa, amb presa interna. DN15 a DN100, tarat de 0,02 a 10 barg i fins a 180 \u00b0C amb tanc.\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"ca\",\"datePublished\":\"2020-02-05T12:36:31+02:00\",\"dateModified\":\"2026-03-19T14:12:44+02:00\",\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/#breadcrumb\"},\"mainEntity\":{\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/#product\"}},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\",\"width\":\"1000\",\"height\":\"1000\",\"caption\":\"V\u00e0lvula reductora de pressi\u00f3\",\"inLanguage\":\"ca\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Inici\",\"item\":\"https:\/\/www.valfonta.com\/ca\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"V\u00e0lvules d'alleujament de pressi\u00f3\",\"item\":\"https:\/\/www.valfonta.com\/ca\/valvules-alleujament-de-pressio\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S2\",\"item\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/\"}]},{\"@type\":\"Product\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/#product\",\"name\":\"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 S2\",\"url\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/\",\"description\":\"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 autoreguladora d'acci\u00f3 directa, amb actuador de membrana i presa de pressi\u00f3 interna. Mant\u00e9 la pressi\u00f3 d'entrada al valor m\u00e0xim ajustat, de 0,02 a 10 barg, en aire comprimit, gasos, l\u00edquids i vapor a baixa temperatura.\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Valfonta\"},\"manufacturer\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"model\":\"S2\",\"image\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\",\"material\":\"Acer al carboni WCB o acer inoxidable CF3M\",\"additionalProperty\":[{\"@type\":\"PropertyValue\",\"name\":\"Tipus\",\"value\":\"Autoreguladora, d'acci\u00f3 directa, amb actuador de membrana i tancament equilibrat per \u00e8mbol de compensaci\u00f3\"},{\"@type\":\"PropertyValue\",\"name\":\"Di\u00e0metres\",\"value\":\"DN15 a DN100\"},{\"@type\":\"PropertyValue\",\"name\":\"Connexions\",\"value\":\"Brides EN PN16, PN25 i PN40 \u00b7 Brides ANSI 150 \/ 300 \u00b7 Rosca BSP o NPT fins a 2\u2033\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressi\u00f3 nominal\",\"value\":\"PN16 \u2013 PN25 \u2013 PN40 \u00b7 ANSI Classe 150 \u2013 Classe 300\"},{\"@type\":\"PropertyValue\",\"name\":\"Rang de tarat\",\"value\":\"0,02 a 10 barg segons l'actuador i la molla (fins a 16 barg, consultar)\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressi\u00f3 m\u00e0xima d'entrada\",\"value\":\"10 barg (fins a 16 barg, consultar)\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressi\u00f3 diferencial m\u00e0xima\",\"value\":\"16 bar de DN15 a DN50\"},{\"@type\":\"PropertyValue\",\"name\":\"Coeficient Kv\",\"value\":\"De 3,5 m\u00b3\/h (DN15) a 115 m\u00b3\/h (DN100). Kv redu\u00eft sota comanda\"},{\"@type\":\"PropertyValue\",\"name\":\"Temperatura segons la membrana\",\"value\":\"NBR: \u221220 a 80 \u00b0C \u00b7 EPDM: \u221240 a 125 \u00b0C \u00b7 PTFE: fins a 180 \u00b0C amb tanc de condensaci\u00f3 \u00b7 FKM: consultar\"},{\"@type\":\"PropertyValue\",\"name\":\"Temperatura segons el tancament\",\"value\":\"NBR: 80 \u00b0C \u00b7 EPDM: 125 \u00b0C \u00b7 FPM: 150 \u00b0C \u00b7 PTFE + grafit: 180 \u00b0C\"},{\"@type\":\"PropertyValue\",\"name\":\"Material del cos\",\"value\":\"Acer al carboni WCB (1.0619) o acer inoxidable CF3M (1.4408). Sota comanda: bronze RG10, d\u00faplex o superd\u00faplex\"},{\"@type\":\"PropertyValue\",\"name\":\"Interiors\",\"value\":\"Acer inoxidable AISI 316L\"},{\"@type\":\"PropertyValue\",\"name\":\"Presa de pressi\u00f3\",\"value\":\"Interna de s\u00e8rie. Externa sota comanda, obligat\u00f2ria per a vapor i per a l\u00edquids a m\u00e9s de 125 \u00b0C\"},{\"@type\":\"PropertyValue\",\"name\":\"Construccions especials\",\"value\":\"Actuador d'acer inoxidable \u00b7 Kv redu\u00eft \u00b7 Tap de protecci\u00f3 de l'eix de regulaci\u00f3\"},{\"@type\":\"PropertyValue\",\"name\":\"ATEX\",\"value\":\"II 2 GD c IIC Tx \/ c IIIC Tx\u00baC \u00b7 certificat LOM 14.034 U\"},{\"@type\":\"PropertyValue\",\"name\":\"Directiva d'equips a pressi\u00f3\",\"value\":\"PED 2014\/68\/UE: la placa indica si requereix marcatge CE\"}],\"category\":\"V\u00e0lvules d'alleujament de pressi\u00f3\",\"subjectOf\":[{\"@type\":\"DigitalDocument\",\"name\":\"Fitxa t\u00e8cnica S2\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/S2-18A-ESP.pdf\",\"encodingFormat\":\"application\/pdf\"},{\"@type\":\"DigitalDocument\",\"name\":\"Manual de funcionament, instal\u00b7laci\u00f3 i manteniment\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Manual-S2-18A-ESP.pdf\",\"encodingFormat\":\"application\/pdf\"}]},{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"La S2 \u00e9s una v\u00e0lvula de seguretat?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. \u00c9s un accessori de pressi\u00f3 que alleuja l'exc\u00e9s de manera proporcional. Si la instal\u00b7laci\u00f3 necessita protecci\u00f3 contra sobrepressions, cal instal\u00b7lar-hi tamb\u00e9 una v\u00e0lvula de seguretat.\"}},{\"@type\":\"Question\",\"name\":\"Necessita canonada de comandament exterior?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, de s\u00e8rie porta presa de pressi\u00f3 interna. Nom\u00e9s cal presa externa amb vapor o amb l\u00edquids a m\u00e9s de 125 \u00b0C, connectada a 1 m de l'entrada com a m\u00ednim, o si es demana expressament.\"}},{\"@type\":\"Question\",\"name\":\"Es pot fer servir amb vapor?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"S\u00ed, amb vapor a baixa temperatura. S'ha de demanar amb presa de pressi\u00f3 externa i tanc de condensaci\u00f3, que protegeix la membrana del sobreescalfament. Amb membrana de PTFE i tanc treballa fins a 180 \u00b0C.\"}},{\"@type\":\"Question\",\"name\":\"Quina pressi\u00f3 de tarat admet?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"De 0,02 a 10 barg, segons l'actuador i la molla; fins a 16 barg, consultar. Per a 0,02 a 0,05 barg s'utilitza l'actuador de 350 mm (DN15 a DN32).\"}},{\"@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-792","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\/792","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=792"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_brand?post=792"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_cat?post=792"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_tag?post=792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}