{"id":797,"date":"2026-10-02T13:17:51","date_gmt":"2026-10-02T11:17:51","guid":{"rendered":"https:\/\/www.valfonta.com\/producto\/valvula-reductora-de-pressio-model-prv45\/"},"modified":"2026-10-22T09:23:39","modified_gmt":"2026-10-22T07:23:39","slug":"valvula-reductora-de-pressio-model-prv45","status":"publish","type":"product","link":"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv45\/","title":{"rendered":"V\u00e0lvula reductora de pressi\u00f3 PRV45"},"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 aria-hidden=\"true\" class=\"vf-sep\">\u203a<\/span><a href=\"https:\/\/www.valfonta.com\/ca\/valvules-reductores-de-pressio\/\">V\u00e0lvules reductores de pressi\u00f3<\/a><span aria-hidden=\"true\" class=\"vf-sep\">\u203a<\/span><span aria-current=\"page\">V\u00e0lvula reductora de pressi\u00f3 PRV45<\/span><\/p><\/nav><article class=\"wp-block-group vf-pdp vfd-model--PRV45 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 reductora de pressi\u00f3 \u00b7 Baixa pressi\u00f3 de sortida<\/p><h1 class=\"wp-block-heading\">V\u00e0lvula reductora de pressi\u00f3 PRV45<\/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\">Baixa pressi\u00f3<\/span><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV45-55-700x700-1.jpg\" alt=\"V\u00e0lvula reductora de pressi\u00f3 PRV45 d&#x27;acer inoxidable 316L amb actuador de membrana per a baixa pressi\u00f3\" class=\"wp-image-191\" 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\">Reductora autoregulada d'acci\u00f3 directa amb actuador de membrana, dissenyada especialment per a gasos a pressi\u00f3 de sortida redu\u00efda: regula des de 10 mbar fins a 8 barg. El cos i els interiors s\u00f3n d'acer inoxidable AISI 316L i admet vapor fins a 150 \u00b0C.<\/p><ul class=\"vf-pdp-keys wp-block-list\"><li><span>Di\u00e0metres<\/span><b>DN15 a DN25<\/b><\/li><li><span>Pressi\u00f3 nominal<\/span><b>PN25<\/b><\/li><li><span>Pressi\u00f3 d'entrada<\/span><b>fins a 16 barg<\/b><\/li><li><span>Pressi\u00f3 de sortida<\/span><b>0,01 a 8 barg<\/b><\/li><li><span>Temperatura<\/span><b>\u221210 a 150 \u00b0C <small>amb juntes de Viton<\/small><\/b><\/li><li><span>Kv<\/span><b>2 a 3,5 m\u00b3\/h<\/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\/PRV45-23-ESP.pdf\" rel=\"noopener\" target=\"_blank\">Descarregar la fitxa t\u00e8cnica <small>PDF<\/small><\/a><\/p><\/div><p class=\"vf-pdp-contact wp-block-paragraph\">T\u00e9 dubtes sobre 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>Regulaci\u00f3 des de 10 mbar<\/li><li>Presa de pressi\u00f3 interna 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 PRV45<\/h2><p class=\"wp-block-paragraph\">La <strong>PRV45<\/strong> \u00e9s la <a href=\"https:\/\/www.valfonta.com\/ca\/valvules-reductores-de-pressio\/\">v\u00e0lvula reductora de pressi\u00f3<\/a> de Valfonta per a pressions de sortida molt baixes. Funciona per acci\u00f3 directa, sense energia auxiliar: la pressi\u00f3 de sortida actua sobre una membrana i s'oposa a la molla de regulaci\u00f3. El di\u00e0metre de l'actuador es tria segons el rang: com m\u00e9s gran, m\u00e9s baixa \u00e9s la pressi\u00f3 que pot regular, fins a 10 mbar.<\/p><p class=\"wp-block-paragraph\">Est\u00e0 pensada sobretot per a <strong>gasos a baixa pressi\u00f3<\/strong>, per\u00f2 tamb\u00e9 treballa amb vapor, aigua, fuel-oil i altres l\u00edquids i gasos dels grups 1 i 2. De s\u00e8rie porta presa de pressi\u00f3 interna, per la qual cosa en l\u00edquids i gasos no necessita canonada de comandament. Si dubta entre una reductora de pist\u00f3 i una de membrana, consulti la nostra comparativa de pist\u00f3 i membrana.<\/p><ul class=\"vf-pdp-apps wp-block-list\"><li><b>Gasos a baixa pressi\u00f3<\/b><span>Aire comprimit, nitrogen i gasos neutres amb sortides de mil\u00b7libars.<\/span><\/li><li><b>Vapor<\/b><span>Fins a 150 \u00b0C, amb canonada de comandament externa i, per sobre de 120 \u00b0C, pot de condensaci\u00f3.<\/span><\/li><li><b>Laboratoris qu\u00edmics<\/b><span>Alimentaci\u00f3 d'equips amb pressi\u00f3 baixa i estable.<\/span><\/li><li><b>Plantes sanit\u00e0ries<\/b><span>L\u00ednies en qu\u00e8 s'exigeix acer inoxidable 316L.<\/span><\/li><li><b>Sistemes de ruixadors<\/b><span>Estabilitzaci\u00f3 de la pressi\u00f3 d'alimentaci\u00f3.<\/span><\/li><li><b>L\u00edquids<\/b><span>Aigua i fuel-oil, de \u221210 a 150 \u00b0C.<\/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 PRV45 si\u2026<\/h3><ul class=\"vf-si wp-block-list\"><li>Necessita pressions de sortida molt baixes, des de 10 mbar.<\/li><li>Regula gasos, aire comprimit o nitrogen, o vapor fins a 150 \u00b0C.<\/li><li>Treballa en DN15 a DN25 amb fins a 16 barg d'entrada.<\/li><li>El cos i els interiors han de ser d'acer inoxidable 316L.<\/li><\/ul><h3 class=\"wp-block-heading\">Millor un altre model si\u2026<\/h3><ul class=\"vf-no wp-block-list\"><li>L'entrada supera els 16 bar: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv44\/\">PRV44<\/a> admet 25 bar i la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio\/\">M2<\/a>, 40 bar, totes dues amb vapor.<\/li><li>Necessita m\u00e9s de DN25 amb sortides baixes: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio\/\">M2<\/a> arriba a DN100 i regula des de 0,02 barg.<\/li><li>Necessita sortides de m\u00e9s de 8 barg: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv44\/\">PRV44<\/a> arriba a 12 barg i la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-autoaccionada\/\">M1<\/a>, a 15 barg.<\/li><li>El vapor supera els 150 \u00b0C: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv44\/\">PRV44<\/a> admet 210 \u00b0C i la M1, 220 \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 PRV45<\/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>Reductora de pressi\u00f3 autoregulada, d'acci\u00f3 directa, amb actuador de membrana<\/td><\/tr><tr><th scope=\"row\">Di\u00e0metres<\/th><td>DN15 (\u00bd\u2033), DN20 (\u00be\u2033) i DN25 (1\u2033)<\/td><\/tr><tr><th scope=\"row\">Connexions<\/th><td>Rosca BSP o NPT \u00b7 Brides EN PN16\/25 \u00b7 Brides ANSI CL150 \u00b7 Clamp, SW o BW sota consulta<\/td><\/tr><tr><th scope=\"row\">Pressi\u00f3 nominal<\/th><td>PN25<\/td><\/tr><tr><th scope=\"row\">Pressi\u00f3 m\u00e0xima d'entrada<\/th><td>16 barg<\/td><\/tr><tr><th scope=\"row\">Rang de pressi\u00f3 de sortida<\/th><td>0,01 a 8 barg, segons l'actuador: 10 \u2013 200 mbar \u00b7 0,1 \u2013 2 barg \u00b7 1 \u2013 8 barg<\/td><\/tr><tr><th scope=\"row\">Coeficient Kv<\/th><td>2 m\u00b3\/h (DN15) \u00b7 2,5 m\u00b3\/h (DN20) \u00b7 3,5 m\u00b3\/h (DN25). Kv especials sota consulta<\/td><\/tr><tr><th scope=\"row\">Temperatura<\/th><td>\u221210 a +150 \u00b0C (amb juntes de Viton)<\/td><\/tr><tr><th scope=\"row\">Fluids<\/th><td>L\u00edquids i gasos dels grups 1 i 2: vapor, aire comprimit, nitrogen, fuel-oil, aigua, gasos neutres<\/td><\/tr><tr><th scope=\"row\">Materials<\/th><td>Cos i interiors d'acer inoxidable AISI 316L. Cos de superd\u00faplex sota consulta<\/td><\/tr><tr><th scope=\"row\">Membrana<\/th><td>NBR, EPDM o EPDM+PTFE<\/td><\/tr><tr><th scope=\"row\">Juntes i tancament<\/th><td>NBR, EPDM, Viton o PTFE grafitat<\/td><\/tr><tr><th scope=\"row\">Presa de pressi\u00f3<\/th><td>Interna de s\u00e8rie; externa opcional, necess\u00e0ria en vapor<\/td><\/tr><tr><th scope=\"row\">Directiva d'equips a pressi\u00f3<\/th><td>PED 2014\/68\/UE, article 4.3: no requereix marcatge CE<\/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><\/tbody><\/table><\/figure><\/div><h3 class=\"wp-block-heading\">Dimensions<\/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\">\u00bd\u2033 rosca<\/th><th scope=\"col\">\u00be\u2033 rosca<\/th><th scope=\"col\">1\u2033 rosca<\/th><th scope=\"col\">DN15 EN<\/th><th scope=\"col\">DN20 EN<\/th><th scope=\"col\">DN25 EN<\/th><th scope=\"col\">DN15 ANSI<\/th><th scope=\"col\">DN20 ANSI<\/th><th scope=\"col\">DN25 ANSI<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">Kv (m\u00b3\/h)<\/th><td>2<\/td><td>2,5<\/td><td>3,5<\/td><td>2<\/td><td>2,5<\/td><td>3,5<\/td><td>2<\/td><td>2,5<\/td><td>3,5<\/td><\/tr><tr><th scope=\"row\">Longitud A \/ AA<\/th><td>108<\/td><td>108<\/td><td>108<\/td><td>130<\/td><td>150<\/td><td>160<\/td><td>184<\/td><td>184<\/td><td>184<\/td><\/tr><tr><th scope=\"row\">\u00d8 brida D1<\/th><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>95<\/td><td>105<\/td><td>115<\/td><td>89<\/td><td>98<\/td><td>108<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Mides en mil\u00b7l\u00edmetres. L'al\u00e7ada i el pes depenen de l'actuador triat: consulti la fitxa t\u00e8cnica en PDF o pregunti al nostre equip t\u00e8cnic.<\/p><h3 class=\"wp-block-heading\">Rang de sortida segons l'actuador<\/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\">\u00d8 actuador D (mm)<\/th><th scope=\"col\">Rang de pressi\u00f3 de sortida<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">175<\/th><td>1 \u2013 8 bar<\/td><\/tr><tr><th scope=\"row\">230<\/th><td>0,1 \u2013 2 bar<\/td><\/tr><tr><th scope=\"row\">295<\/th><td>10 \u2013 200 mbar<\/td><\/tr><tr><th scope=\"row\">350<\/th><td>Mil\u00b7libars, sota consulta<\/td><\/tr><\/tbody><\/table><\/figure><\/div><\/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 PRV45<\/h2><p class=\"wp-block-paragraph\">La PRV45 regula per equilibri de forces entre la molla de regulaci\u00f3 i la pressi\u00f3 de sortida, que actua sobre la membrana de l'actuador. La membrana de gran di\u00e0metre permet treballar en mil\u00b7libars.<\/p><ol class=\"vf-steps wp-block-list\"><li><b>Tancament per la pressi\u00f3 d'entrada.<\/b> El fluid entra a la v\u00e0lvula i, per la difer\u00e8ncia de seccions, la pressi\u00f3 d'entrada tendeix a tancar-la.<\/li><li><b>Obertura amb la molla.<\/b> En comprimir la molla de regulaci\u00f3 (28) amb el cargol (30), el conjunt de tancament obre la v\u00e0lvula i permet la regulaci\u00f3.<\/li><li><b>Regulaci\u00f3.<\/b> La pressi\u00f3 de sortida arriba a la membrana per la presa interna i s'oposa a la molla. Quan supera el valor d'ajust, la v\u00e0lvula tanca.<\/li><li><b>Cabal zero.<\/b> Si es tanquen les v\u00e0lvules aig\u00fces avall, la PRV45 absorbeix les oscil\u00b7lacions i mant\u00e9 la pressi\u00f3 de sortida segons la regulaci\u00f3.<\/li><\/ol><\/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 PRV45<\/h2><p class=\"wp-block-paragraph\">Aquest \u00e9s l'esquema recomanat, amb bypass per poder fer el manteniment sense aturar el servei. En vapor el muntatge canvia: ho expliquem a sota dels passos. M\u00e9s detall a la nostra guia sobre com instal\u00b7lar una v\u00e0lvula reductora de pressi\u00f3.<\/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 aria-label=\"Esquema d'instal\u00b7laci\u00f3 recomanat d'una v\u00e0lvula reductora de pressi\u00f3, amb bypass\" role=\"img\" viewbox=\"0 0 900 230\"><path d=\"M20 120 H880\" fill=\"none\" stroke=\"#9aa0a6\" stroke-width=\"6\"><\/path><path d=\"M70 120 V40 H760 V120\" fill=\"none\" stroke=\"#9aa0a6\" stroke-dasharray=\"2 0\" stroke-width=\"4\"><\/path><path d=\"M865 120 l14 0 -10 -7 m10 7 -10 7\" fill=\"none\" stroke=\"#1e2123\" stroke-width=\"3\"><\/path><g><path d=\"M415 40 l-14 -10 v20 z M415 40 l14 -10 v20 z\" fill=\"#fff\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><line stroke=\"#1e2123\" stroke-width=\"2\" x1=\"415\" x2=\"415\" y1=\"40\" y2=\"22\"><\/line><rect fill=\"#1e2123\" height=\"4\" width=\"16\" x=\"407\" y=\"18\"><\/rect><circle cx=\"415\" cy=\"72\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"415\" y=\"76\">1b<\/text><\/g><g><path d=\"M130 120 l-14 -10 v20 z M130 120 l14 -10 v20 z\" fill=\"#fff\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><line stroke=\"#1e2123\" stroke-width=\"2\" x1=\"130\" x2=\"130\" y1=\"120\" y2=\"102\"><\/line><rect fill=\"#1e2123\" height=\"4\" width=\"16\" x=\"122\" y=\"98\"><\/rect><circle cx=\"130\" cy=\"152\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"130\" y=\"156\">1<\/text><\/g><g><rect fill=\"#fff\" height=\"36\" rx=\"4\" stroke=\"#1e2123\" stroke-width=\"2\" width=\"60\" x=\"195\" y=\"102\"><\/rect><circle cx=\"225\" cy=\"160\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"225\" y=\"164\">2<\/text><\/g><path d=\"M205 112 h40 M205 120 h40 M205 128 h40\" stroke=\"#1e2123\" stroke-width=\"1.5\"><\/path><g><line stroke=\"#1e2123\" stroke-width=\"2\" x1=\"300\" x2=\"300\" y1=\"116\" y2=\"90\"><\/line><circle cx=\"300\" cy=\"77\" fill=\"#fff\" r=\"13\" stroke=\"#1e2123\" stroke-width=\"2\"><\/circle><line stroke=\"#e6305d\" stroke-width=\"2\" x1=\"300\" x2=\"307\" y1=\"77\" y2=\"70\"><\/line><circle cx=\"324\" cy=\"64\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"324\" y=\"68\">3<\/text><\/g><g><rect fill=\"#fdecf1\" height=\"68\" rx=\"4\" stroke=\"#e6305d\" stroke-width=\"2\" width=\"110\" x=\"360\" y=\"86\"><\/rect><circle cx=\"415\" cy=\"176\" fill=\"#e6305d\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"415\" y=\"180\">4<\/text><\/g><path d=\"M392 120 h46 l-10 -8 m10 8 -10 8\" fill=\"none\" stroke=\"#e6305d\" stroke-width=\"2.5\"><\/path><path d=\"M470 156 V198\" stroke=\"#1e2123\" stroke-dasharray=\"4 4\" stroke-width=\"2\"><\/path><path d=\"M620 150 V198\" stroke=\"#1e2123\" stroke-dasharray=\"4 4\" stroke-width=\"2\"><\/path><path d=\"M474 190 H616\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><path d=\"M474 190 l8 -5 v10 z M616 190 l-8 -5 v10 z\" fill=\"#1e2123\"><\/path><text fill=\"#1e2123\" font-family=\"Montserrat,Arial\" font-size=\"13\" text-anchor=\"middle\" x=\"545\" y=\"214\">0,5 \u2013 1 m<\/text><g><rect fill=\"#fff\" height=\"34\" rx=\"4\" stroke=\"#1e2123\" stroke-width=\"2\" width=\"26\" x=\"610\" y=\"68\"><\/rect><circle cx=\"623\" cy=\"124\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"623\" y=\"128\">5<\/text><\/g><path d=\"M623 102 V117\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><g><line stroke=\"#1e2123\" stroke-width=\"2\" x1=\"690\" x2=\"690\" y1=\"116\" y2=\"90\"><\/line><circle cx=\"690\" cy=\"77\" fill=\"#fff\" r=\"13\" stroke=\"#1e2123\" stroke-width=\"2\"><\/circle><line stroke=\"#e6305d\" stroke-width=\"2\" x1=\"690\" x2=\"697\" y1=\"77\" y2=\"70\"><\/line><circle cx=\"714\" cy=\"64\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"714\" y=\"68\">6<\/text><\/g><g><path d=\"M800 120 l-14 -10 v20 z M800 120 l14 -10 v20 z\" fill=\"#fff\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><line stroke=\"#1e2123\" stroke-width=\"2\" x1=\"800\" x2=\"800\" y1=\"120\" y2=\"102\"><\/line><rect fill=\"#1e2123\" height=\"4\" width=\"16\" x=\"792\" y=\"98\"><\/rect><circle cx=\"800\" cy=\"152\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"800\" y=\"156\">1a<\/text><\/g><\/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>V\u00e0lvules de tall (1, 1a) i de bypass (1b)<\/li><li>Filtre<\/li><li>Man\u00f2metre d'entrada<\/li><li>Reductora PRV45<\/li><li>V\u00e0lvula de seguretat, a 0,5\u20131 m de la reductora<\/li><li>Man\u00f2metre de sortida<\/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<\/b> abans de muntar la v\u00e0lvula: qualsevol impuresa pot perjudicar el funcionament de la reductora.<\/li><li><b>Instal\u00b7li un filtre colador<\/b> aig\u00fces amunt per protegir el tancament i la membrana, i deixi espai per desmuntar-lo i netejar-lo.<\/li><li><b>Munti la v\u00e0lvula en canonada horitzontal<\/b> i respecti la fletxa del cos. Hi ha una posici\u00f3 de muntatge no permesa, en qu\u00e8 la v\u00e0lvula no treballaria b\u00e9: comprovi-la al manual.<\/li><li><b>Subjecti la canonada, no la v\u00e0lvula:<\/b> els suports han d'anar tan a prop com sigui possible de la reductora, per\u00f2 sense fixar-los mai a ella ni a l'actuador.<\/li><li><b>Deixi entre 0,5 i 1 m<\/b> fins a la v\u00e0lvula de seguretat per a una millor compensaci\u00f3.<\/li><li><b>Posi en marxa a poc a poc:<\/b> obri lentament les v\u00e0lvules de tall per evitar cops d'ariet.<\/li><li><b>Ajusti la pressi\u00f3 de sortida<\/b> amb una clau Allen de 8 mm al cargol de regulaci\u00f3 (30). En comprimir la molla augmenta la pressi\u00f3 de sortida; en descomprimir-la, disminueix.<\/li><\/ol><h3 class=\"wp-block-heading\">Muntatge amb vapor i canonada de comandament externa<\/h3><p class=\"wp-block-paragraph\">En vapor, o si ho demana amb la comanda, la v\u00e0lvula treballa amb <strong>canonada de comandament externa<\/strong>. Connecti-la a la canonada principal a la zona de pressi\u00f3 redu\u00efda, com a m\u00ednim a 1 m de la sortida de la v\u00e0lvula, amb tub de 10 \u00d7 1 mm. Si darrere de la reductora hi ha un distribu\u00efdor, connecti la canonada de comandament al distribu\u00efdor, encara que sigui a diversos metres. Si la v\u00e0lvula tendeix a oscil\u00b7lar, instal\u00b7li una v\u00e0lvula d'agulla a la canonada de comandament.<\/p><p class=\"wp-block-paragraph\">Amb vapor, l'actuador es munta en posici\u00f3 baixa i, per sobre de 120 \u00b0C, \u00e9s imprescindible un <strong>pot de condensaci\u00f3<\/strong> que protegeixi la membrana del sobreescalfament. Llegeixi tamb\u00e9 el nostre article sobre la v\u00e0lvula reductora de pressi\u00f3 per a vapor.<\/p><p class=\"wp-block-paragraph\">La v\u00e0lvula l'ha d'instal\u00b7lar personal qualificat, sense superar mai la pressi\u00f3 i la temperatura de servei per a les quals s'ha dimensionat. En zones ATEX cal assegurar l'equipotencialitat de la v\u00e0lvula amb la instal\u00b7laci\u00f3.<\/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 PRV45<\/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 PRV45<\/b><span>PDF \u00b7 5 p\u00e0gines \u00b7 caracter\u00edstiques, especejament, esquemes d'instal\u00b7laci\u00f3 i dimensions<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/wp-content\/uploads\/2026\/10\/PRV45-23-ESP.pdf\" aria-label=\"PDF Fitxa t\u00e8cnica PRV45 PDF \u00b7 5 p\u00e0gines \u00b7 caracter\u00edstiques, especejament, esquemes d&#x27;instal\u00b7laci\u00f3 i dimensions\" rel=\"noopener\" target=\"_blank\"><\/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 i instal\u00b7laci\u00f3<\/b><span>PDF \u00b7 11 p\u00e0gines \u00b7 muntatge, presa de control, ATEX, manteniment 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-PRV45-23A-ESP.pdf\" aria-label=\"PDF Manual de funcionament i instal\u00b7laci\u00f3 PDF \u00b7 11 p\u00e0gines \u00b7 muntatge, presa de control, ATEX, manteniment i recepci\u00f3\" rel=\"noopener\" target=\"_blank\"><\/a><\/p><\/div><\/div><p class=\"wp-block-paragraph\">Necessita el certificat d'una comanda o la documentaci\u00f3 ATEX? Consulti els nostres <a href=\"https:\/\/www.valfonta.com\/ca\/certificats\/\">certificats de qualitat<\/a> o demani'l al nostre equip t\u00e8cnic.<\/p><\/section><section id=\"comparar\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">La PRV45 comparada amb altres reductores de Valfonta<\/h2><p class=\"wp-block-paragraph\">La PRV45 \u00e9s la reductora amb la pressi\u00f3 de sortida m\u00ednima m\u00e9s baixa de la gamma. Aquesta taula l'ajuda a comprovar si \u00e9s el model adequat o si li conv\u00e9 un altre.<\/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\">Entrada m\u00e0x. (barg)<\/th><th scope=\"col\">Sortida (barg)<\/th><th scope=\"col\">T. m\u00e0x. (\u00b0C)<\/th><th scope=\"col\">Vapor<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-class=\"vf-cur\"><\/span>PRV45<\/th><td>15 \u2013 25<\/td><td>25<\/td><td>16<\/td><td>0,01 \u2013 8<\/td><td>150<\/td><td>S\u00ed<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-a-pisto-model-prv20\/\">PRV20<\/a><\/th><td>8 \u2013 20<\/td><td>40<\/td><td>40<\/td><td>0,2 \u2013 20<\/td><td>150<\/td><td>No<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-a-pisto-model-prv30\/\">PRV30<\/a><\/th><td>15 \u2013 25<\/td><td>25<\/td><td>25<\/td><td>0,5 \u2013 12<\/td><td>80 (125\u2013150)<\/td><td>No<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv44\/\">PRV44<\/a><\/th><td>15 \u2013 25<\/td><td>25<\/td><td>25<\/td><td>0,5 \u2013 12<\/td><td>210<\/td><td>S\u00ed<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-vd\/\">VD<\/a><\/th><td>15 \u2013 100<\/td><td>40<\/td><td>40<\/td><td>1,5 \u2013 16<\/td><td>200<\/td><td>S\u00ed<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-autoaccionada\/\">M1<\/a><\/th><td>15 \u2013 150<\/td><td>40<\/td><td>40<\/td><td>0,1 \u2013 15<\/td><td>220<\/td><td>S\u00ed<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio\/\">M2<\/a><\/th><td>15 \u2013 100<\/td><td>40<\/td><td>40<\/td><td>0,02 \u2013 10<\/td><td>180<\/td><td>S\u00ed<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Temperatura entre par\u00e8ntesis: amb juntes EPDM o Viton. Dades del cat\u00e0leg general de v\u00e0lvules reductores de Valfonta (2025). M\u00e9s informaci\u00f3 sobre les reductores i estabilitzadores de membrana.<\/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 PRV45<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Quina \u00e9s la pressi\u00f3 de sortida m\u00ednima de la PRV45?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">10 mbar (0,01 barg). Amb l'actuador de 295 mm regula de 10 a 200 mbar; amb el de 230 mm, de 0,1 a 2 bar, i amb el de 175 mm, d'1 a 8 bar. Per a rangs especials en mil\u00b7libars hi ha un actuador de 350 mm, sota consulta.<\/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 150 \u00b0C. En vapor la v\u00e0lvula treballa amb canonada de comandament externa, l'actuador es munta en posici\u00f3 baixa i, per sobre de 120 \u00b0C, cal instal\u00b7lar un pot de condensaci\u00f3 per protegir la membrana.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Necessita canonada de comandament?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">En l\u00edquids i gasos, no: se subministra amb presa de pressi\u00f3 interna. En vapor, o si ho demana amb la comanda, es connecta una canonada de comandament de 10 \u00d7 1 mm a la zona de pressi\u00f3 redu\u00efda, com a m\u00ednim a 1 m de la sortida de la v\u00e0lvula.<\/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 sortida?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Amb una clau Allen de 8 mm al cargol de regulaci\u00f3. En comprimir la molla augmenta la pressi\u00f3 de sortida i en descomprimir-la disminueix. Ho expliquem a com es regula una v\u00e0lvula reductora de pressi\u00f3.<\/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\">Molt poc. Revisi juntes, membrana i peces de desgast segons les condicions de servei; es pot fer amb la v\u00e0lvula instal\u00b7lada, despressuritzada i a\u00efllada. Hi ha kits de recanvi de juntes, molles i membranes: indiqui'ns el n\u00famero de s\u00e8rie de la placa quan els demani.<\/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. La PRV45 t\u00e9 marcatge ATEX II 2 GD (certificat LOM 14.034 U) i es pot utilitzar en zones 1 i 2 (gasos, vapors i l\u00edquids inflamables) i 21 i 22 (pols combustible), dins de la classe t\u00e8rmica que correspongui a la temperatura del fluid.<\/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 reductores de pressi\u00f3<\/h2><ul class=\"vf-rel wp-block-list\"><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-a-pisto-model-prv30\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-prv30-frontal-400.webp\" alt=\"Reductora PRV30\" class=\"wp-image-199\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Reductora PRV30<\/b><span>De pist\u00f3, DN15\u201325 i fins a 25 bar d'entrada.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv44\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV30-44-700x700-1.jpg\" alt=\"Reductora PRV44\" class=\"wp-image-181\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Reductora PRV44<\/b><span>Equilibrada per manxa, vapor fins a 210 \u00b0C i 25 bar d'entrada.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-a-pisto-model-prv20\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV20-FOTO-700x700-1.jpg\" alt=\"Reductora PRV20\" class=\"wp-image-198\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Reductora PRV20<\/b><span>Inox 316L, de \u00bc\u2033 a \u00be\u2033 i fins a 40 bar d'entrada.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-vd\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-vd-perspectiva-400.webp\" alt=\"Reductora VD\" class=\"wp-image-10116\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Reductora VD<\/b><span>De DN15 a DN100, fins a 40 bar i vapor fins a 200 \u00b0C.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-autoaccionada\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-m1-perspectiva-400.webp\" alt=\"Reductora M1\" class=\"wp-image-201\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Reductora M1<\/b><span>Fins a DN150 i 220 \u00b0C, per a vapor.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\" alt=\"Reductora de membrana M2\" class=\"wp-image-193\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Reductora de membrana M2<\/b><span>DN15\u2013100, sortides des de 0,02 barg i fins a 40 bar d'entrada.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-amb-manxa\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2F-700x700-1.jpg\" alt=\"Reductora amb manxa M2\" class=\"wp-image-202\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Reductora amb manxa M2<\/b><span>Versi\u00f3 amb manxa d'estanquitat.<\/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 PRV45<\/h2><p class=\"wp-block-paragraph\">Indiqui'ns les dades de la seva instal\u00b7laci\u00f3 i li recomanarem el di\u00e0metre, l'actuador i les juntes adequades.<\/p><ul class=\"wp-block-list\"><li>Fluid i temperatura de servei (indiqui si \u00e9s vapor)<\/li><li>Pressi\u00f3 d'entrada i pressi\u00f3 de sortida desitjada, en mbar si \u00e9s molt baixa<\/li><li>Cabal m\u00e0xim i m\u00ednim<\/li><li>Tipus de connexi\u00f3 (rosca o brides)<\/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-f598-o1\" lang=\"ca\" dir=\"ltr\" data-wpcf7-id=\"598\">\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\/797#wpcf7-f598-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=\"598\" \/><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-f598-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=\"PRV45\" 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=\"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=\"nitrogen, aire, vapor\u2026\" value=\"\" type=\"text\" name=\"fluido\" \/><\/span><\/label><label>Pressi\u00f3 d'entrada (barg)<span class=\"wpcf7-form-control-wrap\" data-name=\"p_entrada\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"p_entrada\" \/><\/span><\/label><label>Pressi\u00f3 de sortida desitjada<span class=\"wpcf7-form-control-wrap\" data-name=\"p_salida\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"p. ex. 50 mbar\" value=\"\" type=\"text\" name=\"p_salida\" \/><\/span><\/label><label>Cabal<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. 20 Nm\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 reductores de pressi\u00f3\u203aV\u00e0lvula reductora de pressi\u00f3 PRV45 V\u00e0lvula reductora de pressi\u00f3 \u00b7 Baixa pressi\u00f3 de sortida V\u00e0lvula reductora de pressi\u00f3 PRV45 Baixa pressi\u00f3 Reductora autoregulada d'acci\u00f3 directa amb actuador de membrana, dissenyada especialment per a gasos a pressi\u00f3 de sortida redu\u00efda: regula des de 10 mbar fins a 8 barg. El cos i els ... <a title=\"V\u00e0lvula reductora de pressi\u00f3 PRV45\" class=\"read-more\" href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv45\/\" aria-label=\"M\u00e9s informaci\u00f3 sobre V\u00e0lvula reductora de pressi\u00f3 PRV45\">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 reductora de pressi\u00f3 PRV45 des de 10 mbar | Valfonta","rank_math_description":"Reductora de pressi\u00f3 PRV45 d'acci\u00f3 directa amb actuador de membrana, en inox 316L. Sortida des de 0,01 barg, entrada fins a 16 barg, DN15 a DN25 i vapor.","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-model-prv45\/#webpage\",\"url\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv45\/\",\"name\":\"V\u00e0lvula reductora de pressi\u00f3 PRV45 des de 10 mbar | Valfonta\",\"description\":\"Reductora de pressi\u00f3 PRV45 d'acci\u00f3 directa amb actuador de membrana, en inox 316L. Sortida des de 0,01 barg, entrada fins a 16 barg, DN15 a DN25 i vapor.\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"ca\",\"datePublished\":\"2020-02-05T11:06:14+02:00\",\"dateModified\":\"2026-03-19T14:30:33+02:00\",\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV45-55-700x700-1.jpg\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv45\/#breadcrumb\"},\"mainEntity\":{\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv45\/#product\"}},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV45-55-700x700-1.jpg\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV45-55-700x700-1.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-model-prv45\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Inici\",\"item\":\"https:\/\/www.valfonta.com\/ca\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"V\u00e0lvules reductores de pressi\u00f3\",\"item\":\"https:\/\/www.valfonta.com\/ca\/valvules-reductores-de-pressio\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"V\u00e0lvula reductora de pressi\u00f3 PRV45\",\"item\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv45\/\"}]},{\"@type\":\"Product\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv45\/#product\",\"name\":\"V\u00e0lvula reductora de pressi\u00f3 PRV45\",\"url\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv45\/\",\"description\":\"Reductora autoregulada d'acci\u00f3 directa amb actuador de membrana, dissenyada especialment per a gasos a pressi\u00f3 de sortida redu\u00efda: regula des de 10 mbar fins a 8 barg. El cos i els interiors s\u00f3n d'acer inoxidable AISI 316L i admet vapor fins a 150 \u00b0C.\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Valfonta\"},\"manufacturer\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"model\":\"PRV45\",\"image\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV45-55-700x700-1.jpg\",\"material\":\"Acer inoxidable AISI 316L\",\"additionalProperty\":[{\"@type\":\"PropertyValue\",\"name\":\"Tipus\",\"value\":\"Reductora de pressi\u00f3 autoregulada, d'acci\u00f3 directa, amb actuador de membrana\"},{\"@type\":\"PropertyValue\",\"name\":\"Di\u00e0metres\",\"value\":\"DN15 (\u00bd\u2033), DN20 (\u00be\u2033) i DN25 (1\u2033)\"},{\"@type\":\"PropertyValue\",\"name\":\"Connexions\",\"value\":\"Rosca BSP o NPT \u00b7 Brides EN PN16\/25 \u00b7 Brides ANSI CL150 \u00b7 Clamp, SW o BW sota consulta\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressi\u00f3 nominal\",\"value\":\"PN25\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressi\u00f3 m\u00e0xima d'entrada\",\"value\":\"16 barg\"},{\"@type\":\"PropertyValue\",\"name\":\"Rang de pressi\u00f3 de sortida\",\"value\":\"0,01 a 8 barg, segons l'actuador: 10 \u2013 200 mbar \u00b7 0,1 \u2013 2 barg \u00b7 1 \u2013 8 barg\"},{\"@type\":\"PropertyValue\",\"name\":\"Coeficient Kv\",\"value\":\"2 m\u00b3\/h (DN15) \u00b7 2,5 m\u00b3\/h (DN20) \u00b7 3,5 m\u00b3\/h (DN25). Kv especials sota consulta\"},{\"@type\":\"PropertyValue\",\"name\":\"Temperatura\",\"value\":\"\u221210 a +150 \u00b0C (amb juntes de Viton)\"},{\"@type\":\"PropertyValue\",\"name\":\"Fluids\",\"value\":\"L\u00edquids i gasos dels grups 1 i 2: vapor, aire comprimit, nitrogen, fuel-oil, aigua, gasos neutres\"},{\"@type\":\"PropertyValue\",\"name\":\"Materials\",\"value\":\"Cos i interiors d'acer inoxidable AISI 316L. Cos de superd\u00faplex sota consulta\"},{\"@type\":\"PropertyValue\",\"name\":\"Membrana\",\"value\":\"NBR, EPDM o EPDM+PTFE\"},{\"@type\":\"PropertyValue\",\"name\":\"Juntes i tancament\",\"value\":\"NBR, EPDM, Viton o PTFE grafitat\"},{\"@type\":\"PropertyValue\",\"name\":\"Presa de pressi\u00f3\",\"value\":\"Interna de s\u00e8rie; externa opcional, necess\u00e0ria en vapor\"},{\"@type\":\"PropertyValue\",\"name\":\"Directiva d'equips a pressi\u00f3\",\"value\":\"PED 2014\/68\/UE, article 4.3: no requereix marcatge CE\"},{\"@type\":\"PropertyValue\",\"name\":\"ATEX\",\"value\":\"II 2 GD c IIC Tx \/ c IIIC Tx\u00baC \u00b7 certificat LOM 14.034 U\"}],\"category\":\"V\u00e0lvules reductores de pressi\u00f3\",\"subjectOf\":[{\"@type\":\"DigitalDocument\",\"name\":\"Fitxa t\u00e8cnica PRV45 (en angl\u00e8s)\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/PRV45-23-ESP.pdf\",\"encodingFormat\":\"application\/pdf\"},{\"@type\":\"DigitalDocument\",\"name\":\"Manual de funcionament i instal\u00b7laci\u00f3\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Manual-PRV45-23A-ESP.pdf\",\"encodingFormat\":\"application\/pdf\"}]},{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv45\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Quina \u00e9s la pressi\u00f3 de sortida m\u00ednima de la PRV45?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"10 mbar (0,01 barg). Amb l'actuador de 295 mm regula de 10 a 200 mbar; amb el de 230 mm, de 0,1 a 2 bar, i amb el de 175 mm, d'1 a 8 bar. Per a rangs especials en mil\u00b7libars hi ha un actuador de 350 mm, sota consulta.\"}},{\"@type\":\"Question\",\"name\":\"Es pot fer servir amb vapor?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"S\u00ed, fins a 150 \u00b0C. En vapor la v\u00e0lvula treballa amb canonada de comandament externa, l'actuador es munta en posici\u00f3 baixa i, per sobre de 120 \u00b0C, cal instal\u00b7lar un pot de condensaci\u00f3 per protegir la membrana.\"}},{\"@type\":\"Question\",\"name\":\"Necessita canonada de comandament?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"En l\u00edquids i gasos, no: se subministra amb presa de pressi\u00f3 interna. En vapor, o si ho demana amb la comanda, es connecta una canonada de comandament de 10 \u00d7 1 mm a la zona de pressi\u00f3 redu\u00efda, com a m\u00ednim a 1 m de la sortida de la v\u00e0lvula.\"}},{\"@type\":\"Question\",\"name\":\"Com s'ajusta la pressi\u00f3 de sortida?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Amb una clau Allen de 8 mm al cargol de regulaci\u00f3. En comprimir la molla augmenta la pressi\u00f3 de sortida i en descomprimir-la disminueix. Ho expliquem a com es regula una v\u00e0lvula reductora de pressi\u00f3.\"}},{\"@type\":\"Question\",\"name\":\"Quin manteniment necessita?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Molt poc. Revisi juntes, membrana i peces de desgast segons les condicions de servei; es pot fer amb la v\u00e0lvula instal\u00b7lada, despressuritzada i a\u00efllada. Hi ha kits de recanvi de juntes, molles i membranes: indiqui'ns el n\u00famero de s\u00e8rie de la placa quan els demani.\"}},{\"@type\":\"Question\",\"name\":\"Es pot instal\u00b7lar en una zona ATEX?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"S\u00ed. La PRV45 t\u00e9 marcatge ATEX II 2 GD (certificat LOM 14.034 U) i es pot utilitzar en zones 1 i 2 (gasos, vapors i l\u00edquids inflamables) i 21 i 22 (pols combustible), dins de la classe t\u00e8rmica que correspongui a la temperatura del fluid.\"}}]}]}]"},"product_brand":[],"product_cat":[80],"product_tag":[],"class_list":["post-797","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\/797","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=797"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_brand?post=797"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_cat?post=797"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_tag?post=797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}