{"id":791,"date":"2026-10-02T13:17:45","date_gmt":"2026-10-02T11:17:45","guid":{"rendered":"https:\/\/www.valfonta.com\/producto\/valvula-exces-de-pressio-model-prv55\/"},"modified":"2026-10-22T09:24:02","modified_gmt":"2026-10-22T07:24:02","slug":"valvula-exces-de-pressio-model-prv55","status":"publish","type":"product","link":"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv55\/","title":{"rendered":"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 PRV55"},"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 PRV55<\/span><\/p><\/nav><article class=\"wp-block-group vf-pdp vfd-model--PRV55 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 Actuador de membrana<\/p><h1 class=\"wp-block-heading\">V\u00e0lvula d'exc\u00e9s de pressi\u00f3 PRV55<\/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\">Des de 10 mbar<\/span><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV45-55-700x700-1.jpg\" alt=\"V\u00e0lvula d&#x27;exc\u00e9s de pressi\u00f3 PRV55 amb actuador de membrana i cos d&#x27;acer inoxidable 316L\" 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\">V\u00e0lvula autoregulada d'exc\u00e9s de pressi\u00f3, d'acci\u00f3 directa, amb actuador de membrana i cos i interiors d'acer inoxidable 316L. Descarrega l'exc\u00e9s quan la pressi\u00f3 aig\u00fces amunt supera el tarat, ajustable des de 0,01 barg, en gasos, l\u00edquids i 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>Rang de tarat<\/span><b>0,01 a 8 barg <small>segons l'actuador<\/small><\/b><\/li><li><span>Pressi\u00f3 d'entrada<\/span><b>fins a 16 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\/PRV55-16B-ENG.pdf\" target=\"_blank\" rel=\"noopener\">Descarregar la fitxa t\u00e8cnica <small>PDF<\/small><\/a><\/p><\/div><p class=\"vf-pdp-contact wp-block-paragraph\">T\u00e9 dubtes sobre el tarat o el dimensionament? Truqui al <a href=\"tel:+34933720888\">933 720 888<\/a> o escrigui a <a href=\"mailto:valfonta@valfonta.com\">valfonta@valfonta.com<\/a>.<\/p><\/div><\/div><ul class=\"vf-pdp-trust wp-block-list\"><li>Disseny i fabricaci\u00f3 pr\u00f2pies a Badalona<\/li><li>Marcatge ATEX II 2 GD per a zones 1 i 21<\/li><li>Totes les v\u00e0lvules se subministren desgreixades<\/li><li>Recanvis originals disponibles<\/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 PRV55<\/h2><p class=\"wp-block-paragraph\">La <strong>PRV55<\/strong> \u00e9s una <a href=\"https:\/\/www.valfonta.com\/ca\/valvules-alleujament-de-pressio\/\">v\u00e0lvula d'exc\u00e9s de pressi\u00f3<\/a> autoregulada: no necessita energia auxiliar. La pressi\u00f3 aig\u00fces amunt arriba a una <strong>membrana<\/strong> i, quan supera el valor de tarat, la v\u00e0lvula s'obre proporcionalment i alleuja l'exc\u00e9s.<\/p><p class=\"wp-block-paragraph\">La membrana permet tarats <strong>des de 10 mbar<\/strong>; la resta de la gamma comen\u00e7a a 0,5 barg. Est\u00e0 especialment pensada per a gasos, tot i que tamb\u00e9 treballa amb l\u00edquids i vapor. M\u00e9s detall al nostre article sobre v\u00e0lvules d'exc\u00e9s de pressi\u00f3.<\/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 tarats des de 0,01 barg.<\/span><\/li><li><b>Plantes de vapor<\/b><span>Xarxes de vapor i intercanviadors de calor, amb tanc de condensaci\u00f3.<\/span><\/li><li><b>Laboratoris qu\u00edmics<\/b><span>Pressi\u00f3 estable en circuits de gasos i l\u00edquids.<\/span><\/li><li><b>Fuel-oil i ruixadors<\/b><span>L\u00edquids dels grups 1 i 2, com ara fuel-oil o aigua.<\/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 PRV55 si\u2026<\/h3><ul class=\"vf-si wp-block-list\"><li>Necessita tarats molt baixos, des de 10 mbar, i fins a 8 barg.<\/li><li>Treballa amb gasos, l\u00edquids o vapor dels grups 1 i 2, fins a 150 \u00b0C.<\/li><li>Necessita di\u00e0metres petits, de DN15 a DN25, amb cos d'acer inoxidable 316L.<\/li><li>Busca una v\u00e0lvula autoregulada, sense aire ni electricitat.<\/li><\/ul><h3 class=\"wp-block-heading\">Millor un altre model si\u2026<\/h3><ul class=\"vf-no wp-block-list\"><li>Tara per sobre de 8 barg: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv54\/\">PRV54<\/a> arriba a 12 barg, la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/\">S2<\/a> a 10 i la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-alleujament-de-pressio\/\">S3<\/a> a 20.<\/li><li>Supera els 150 \u00b0C: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv54\/\">PRV54<\/a> admet 210 \u00b0C, i 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>, 220 \u00b0C.<\/li><li>Necessita m\u00e9s de DN25: 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 DN150, i la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/\">S2<\/a>, a DN100.<\/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 PRV55<\/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>V\u00e0lvula d'exc\u00e9s de pressi\u00f3 autoregulada, d'acci\u00f3 directa, equilibrada per pist\u00f3, 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 \u00b7 Brides ANSI CL150 \u00b7 Clamp 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 tarat<\/th><td>0,01 a 8 barg, segons la mida de l'actuador i la molla<\/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 especial sota comanda<\/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, fuel-oil, aigua, nitrogen, gasos neutres<\/td><\/tr><tr><th scope=\"row\">Materials<\/th><td>Cos i interiors en acer inoxidable AISI 316L. Membrana en EPDM o EPDM+PTFE. Actuador de xapa d'acer amb pintura epoxi<\/td><\/tr><tr><th scope=\"row\">Presa de pressi\u00f3<\/th><td>Interna o externa. Externa necess\u00e0ria amb vapor i amb l\u00edquids a m\u00e9s de 125 \u00b0C<\/td><\/tr><tr><th scope=\"row\">Posici\u00f3 de muntatge<\/th><td>Canonada horitzontal. Actuador cap avall amb qualsevol fluid i sempre amb vapor; cap amunt nom\u00e9s amb gasos i l\u00edquids fins a 80 \u00b0C<\/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 (fluids dels grups 1 i 2)<\/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\">Sota comanda<\/th><td>Cos en bronze RG10 \u00b7 actuador d'acer inoxidable \u00b7 juntes especials \u00b7 Kv especial<\/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\">\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\">Al\u00e7ada H1<\/th><td>258<\/td><td>258<\/td><td>258<\/td><td>258<\/td><td>258<\/td><td>258<\/td><td>258<\/td><td>258<\/td><td>258<\/td><\/tr><tr><th scope=\"row\">Al\u00e7ada H2<\/th><td>320<\/td><td>320<\/td><td>320<\/td><td>320<\/td><td>320<\/td><td>320<\/td><td>320<\/td><td>320<\/td><td>320<\/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><tr><th scope=\"row\">Pes (kg)<\/th><td>2,5<\/td><td>2,5<\/td><td>2,5<\/td><td>5<\/td><td>5<\/td><td>5<\/td><td>5<\/td><td>5<\/td><td>5<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Mides en mil\u00b7l\u00edmetres. El di\u00e0metre de l'actuador (D) dep\u00e8n del rang de tarat. Els pl\u00e0nols acotats s\u00f3n a la fitxa t\u00e8cnica en PDF.<\/p><h3 class=\"wp-block-heading\">Rang de tarat 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 tarat<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">295<\/th><td>10 \u2013 200 mbar<\/td><\/tr><tr><th scope=\"row\">230<\/th><td>100 \u2013 1.000 mbar<\/td><\/tr><tr><th scope=\"row\">230<\/th><td>0,5 \u2013 2 barg<\/td><\/tr><tr><th scope=\"row\">175<\/th><td>1 \u2013 4 barg<\/td><\/tr><tr><th scope=\"row\">175<\/th><td>3 \u2013 8 barg<\/td><\/tr><tr><th scope=\"row\">350<\/th><td>Consultar<\/td><\/tr><\/tbody><\/table><\/figure><\/div><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Especejament i materials (33 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 inox. AISI 316L<\/td><\/tr><tr><th scope=\"row\">2<\/th><td>Cargol de tancament<\/td><td>Acer inox. 316L<\/td><\/tr><tr><th scope=\"row\">3<\/th><td>Tancament<\/td><td>PTFE grafitat<\/td><\/tr><tr><th scope=\"row\">4<\/th><td>Junta<\/td><td>PTFE<\/td><\/tr><tr><th scope=\"row\">5<\/th><td>Seient<\/td><td>Acer inox. 316L<\/td><\/tr><tr><th scope=\"row\">6<\/th><td>Junta<\/td><td>PTFE<\/td><\/tr><tr><th scope=\"row\">7<\/th><td>Tapa de la v\u00e0lvula<\/td><td>Acer 1.1141<\/td><\/tr><tr><th scope=\"row\">8<\/th><td>Junta<\/td><td>PTFE<\/td><\/tr><tr><th scope=\"row\">9<\/th><td>Actuador superior<\/td><td>Xapa d'acer 1.0035 amb pintura epoxi<\/td><\/tr><tr><th scope=\"row\">10<\/th><td>Actuador inferior<\/td><td>Xapa d'acer 1.0035 amb pintura epoxi<\/td><\/tr><tr><th scope=\"row\">11<\/th><td>Eix<\/td><td>Acer inox. 316L<\/td><\/tr><tr><th scope=\"row\">12<\/th><td>Guia del casquet<\/td><td>Acer inox. 316L<\/td><\/tr><tr><th scope=\"row\">13<\/th><td>Guia de l'eix<\/td><td>Acer inox. 316L<\/td><\/tr><tr><th scope=\"row\">14<\/th><td>Cargol Allen<\/td><td>Acer inox. A2-70<\/td><\/tr><tr><th scope=\"row\">15<\/th><td>Junta<\/td><td>PTFE grafitat<\/td><\/tr><tr><th scope=\"row\">17<\/th><td>Suport del tancament<\/td><td>Acer inox. 316L<\/td><\/tr><tr><th scope=\"row\">18<\/th><td>Guia del tancament<\/td><td>Acer inox. 316L<\/td><\/tr><tr><th scope=\"row\">21<\/th><td>Tapa inferior<\/td><td>Acer inox. 316L<\/td><\/tr><tr><th scope=\"row\">22<\/th><td>Junta<\/td><td>Viton<\/td><\/tr><tr><th scope=\"row\">23<\/th><td>Femella<\/td><td>Acer inox. A2<\/td><\/tr><tr><th scope=\"row\">24<\/th><td>Cargol M8<\/td><td>Acer inox. A2<\/td><\/tr><tr><th scope=\"row\">25<\/th><td>Femella KM-6<\/td><td>Acer<\/td><\/tr><tr><th scope=\"row\">26<\/th><td>Junta t\u00f2rica<\/td><td>NBR \/ Viton<\/td><\/tr><tr><th scope=\"row\">27<\/th><td>Suport de la molla<\/td><td>Xapa d'acer 1.0035 galvanitzada<\/td><\/tr><tr><th scope=\"row\">28<\/th><td>Molla de regulaci\u00f3<\/td><td>Acer 52SiCrNi5<\/td><\/tr><tr><th scope=\"row\">29<\/th><td>Caputx\u00f3 de la molla<\/td><td>Acer 1.1191 amb pintura epoxi<\/td><\/tr><tr><th scope=\"row\">30<\/th><td>Cargol de regulaci\u00f3<\/td><td>Acer galvanitzat 1.1191<\/td><\/tr><tr><th scope=\"row\">31<\/th><td>Femella de regulaci\u00f3<\/td><td>Acer galvanitzat 1.1191<\/td><\/tr><tr><th scope=\"row\">32<\/th><td>Guia de la molla<\/td><td>Acer galvanitzat 1.1191<\/td><\/tr><tr><th scope=\"row\">33<\/th><td>Cargol<\/td><td>Acer inox. A2-70<\/td><\/tr><tr><th scope=\"row\">34<\/th><td>Femella<\/td><td>Acer inox. A2-70<\/td><\/tr><tr><th scope=\"row\">35<\/th><td>Suport inferior de la membrana<\/td><td>Acer inox. 316L<\/td><\/tr><tr><th scope=\"row\">36<\/th><td>Membrana<\/td><td>EPDM \/ EPDM+PTFE<\/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\">PRV55.SP1<\/th><td>Kit de tancament i sistema d'equilibratge<\/td><td>2, 3, 11, 12, 15 i 17<\/td><\/tr><tr><th scope=\"row\">PRV55.SP2<\/th><td>Juntes<\/td><td>6 i 22<\/td><\/tr><tr><th scope=\"row\">PRV55.SP3<\/th><td>Molles<\/td><td>Consulti el manual<\/td><\/tr><tr><th scope=\"row\">PRV55.SP4<\/th><td>Membrana EPDM i juntes t\u00f2riques<\/td><td>26 i 36<\/td><\/tr><tr><th scope=\"row\">PRV55.SP4<\/th><td>Membrana EPDM, membrana PTFE i juntes t\u00f2riques<\/td><td>26, 36 i 36b<\/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 PRV55<\/h2><p class=\"wp-block-paragraph\">La PRV55 treballa per equilibri entre la molla de regulaci\u00f3 i la pressi\u00f3 d'entrada, que actua sobre la membrana, sense aire ni electricitat.<\/p><ol class=\"vf-steps wp-block-list\"><li><b>Tancada sense pressi\u00f3.<\/b> Mentre la pressi\u00f3 d'entrada no arriba al tarat, la molla de regulaci\u00f3 (28) mant\u00e9 la v\u00e0lvula tancada. El pist\u00f3 equilibra la pressi\u00f3 que actua sobre el tancament.<\/li><li><b>Detecci\u00f3 a la membrana.<\/b> La pressi\u00f3 aig\u00fces amunt arriba a la membrana per la l\u00ednia de control externa o, opcionalment, per la presa interna.<\/li><li><b>Obertura proporcional.<\/b> Quan aquesta pressi\u00f3 supera el valor de consigna, la v\u00e0lvula s'obre en proporci\u00f3 a l'increment de pressi\u00f3 i descarrega l'exc\u00e9s. Si baixa, la molla la torna a tancar.<\/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 PRV55<\/h2><p class=\"wp-block-paragraph\">La instal\u00b7laci\u00f3 t\u00edpica de la PRV55 \u00e9s en una derivaci\u00f3 de la l\u00ednia principal, amb desc\u00e0rrega a reciclatge.<\/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>Bomba o equip que genera la pressi\u00f3<\/li><li>Man\u00f2metre d'entrada<\/li><li>V\u00e0lvula d'exc\u00e9s de pressi\u00f3 PRV55, amb v\u00e0lvula d'interrupci\u00f3 i filtre al davant<\/li><li>Desc\u00e0rrega a reciclatge o dip\u00f2sit<\/li><li>Consum o equip protegit<\/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 part\u00edcula pot danyar el tancament.<\/li><li><b>Instal\u00b7li un filtre colador<\/b> aig\u00fces amunt per protegir el tancament i la membrana, amb espai per netejar-lo.<\/li><li><b>Munti la v\u00e0lvula en canonada horitzontal<\/b>, segons la fletxa del cos. L'actuador va cap avall (sempre amb vapor) o, amb gasos i l\u00edquids fins a 80 \u00b0C, cap amunt; mai en horitzontal.<\/li><li><b>Connecti la l\u00ednia de control externa<\/b> amb vapor i amb l\u00edquids a m\u00e9s de 125 \u00b0C (recomanada tamb\u00e9 per sota; amb gasos no cal): tub de 10 \u00d7 1 mm a la canonada principal, com a m\u00ednim a 1 m de la v\u00e0lvula. Si la pressi\u00f3 oscil\u00b7la, afegeixi una v\u00e0lvula d'agulla.<\/li><li><b>Instal\u00b7li el tanc de condensaci\u00f3<\/b> amb vapor i amb l\u00edquids a m\u00e9s de 120 \u00b0C, al punt m\u00e9s alt de la canonada, i ompli'l d'aigua fins que vessi abans de la posada en marxa.<\/li><li><b>Subjecti la canonada, no la v\u00e0lvula:<\/b> suports a prop de les brides, mai a la v\u00e0lvula ni a l'actuador. Amb vapor, inclini la canonada per evacuar el condensat.<\/li><li><b>Posi en marxa a poc a poc:<\/b> obri lentament les v\u00e0lvules d'interrupci\u00f3 per evitar cops d'ariet.<\/li><li><b>Ajusti la pressi\u00f3 de tarat<\/b> amb el cargol de regulaci\u00f3. En comprimir la molla augmenta la pressi\u00f3 de tarat; en descomprimir-la, disminueix. Comprovi el valor al man\u00f2metre d'entrada.<\/li><\/ol><p class=\"wp-block-paragraph\">La v\u00e0lvula l'ha d'instal\u00b7lar personal qualificat, sense superar mai la temperatura de servei per a la qual s'ha dimensionat. En zones ATEX cal assegurar l'equipotencialitat de la v\u00e0lvula amb la instal\u00b7laci\u00f3. Vegi tamb\u00e9 la nostra guia sobre el tarat de v\u00e0lvules d'alleujament.<\/p><\/section><section id=\"documentacion\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Documentaci\u00f3 t\u00e8cnica de la PRV55<\/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 PRV55 (en angl\u00e8s)<\/b><span>PDF \u00b7 5 p\u00e0gines \u00b7 caracter\u00edstiques, especejament, 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\/PRV55-16B-ENG.pdf\" aria-label=\"PDF Fitxa t\u00e8cnica PRV55 (en angl\u00e8s) PDF \u00b7 5 p\u00e0gines \u00b7 caracter\u00edstiques, especejament, instal\u00b7laci\u00f3 i dimensions\" 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 i instal\u00b7laci\u00f3 (en angl\u00e8s)<\/b><span>PDF \u00b7 13 p\u00e0gines \u00b7 muntatge, ATEX, recanvis, desmuntatge 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-PRV55-16B-ENG.pdf\" aria-label=\"PDF Manual de funcionament i instal\u00b7laci\u00f3 (en angl\u00e8s) PDF \u00b7 13 p\u00e0gines \u00b7 muntatge, ATEX, recanvis, desmuntatge i recepci\u00f3\" target=\"_blank\" rel=\"noopener\"><\/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 PRV55 comparada amb altres v\u00e0lvules d'exc\u00e9s de pressi\u00f3<\/h2><p class=\"wp-block-paragraph\">La gamma cobreix des de DN15 fins a DN150 i tarats de 0,01 a 20 barg. Comprovi si la PRV55 \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\">Tarat (barg)<\/th><th scope=\"col\">T. m\u00e0x. (\u00b0C)<\/th><th scope=\"col\">Vapor<\/th><th scope=\"col\">Cos<\/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\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-class=\"vf-cur\"><\/span>PRV55<\/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 WCB o inox CF3M<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/\">S2<\/a><\/th><td>15 \u2013 100<\/td><td>40<\/td><td>0,02 \u2013 10<\/td><td>180<\/td><td>S\u00ed<\/td><td>Acer WCB 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 WCB 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 WCB o inox CF3M<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Dades del cat\u00e0leg resum de v\u00e0lvules d'exc\u00e9s de pressi\u00f3 de Valfonta (2025), excepte el tarat de la S2, que procedeix de la seva fitxa t\u00e8cnica. Tots els models admeten l\u00edquids, oli, aire i gasos no inflamables. Si dubta entre una v\u00e0lvula d'exc\u00e9s i una de seguretat, llegeixi la difer\u00e8ncia entre v\u00e0lvula de seguretat i d'alleujament.<\/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 PRV55<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Quina pressi\u00f3 de tarat es pot ajustar amb la PRV55?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">De 0,01 a 8 barg, segons la mida de l'actuador i la molla (vegi la taula d'especificacions). La pressi\u00f3 m\u00e0xima d'entrada \u00e9s de 16 barg.<\/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. Amb vapor es munta en canonada horitzontal amb l'actuador cap avall, amb l\u00ednia de control externa i amb tanc de condensaci\u00f3 ple d'aigua, que protegeix la membrana de la calor.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Quina difer\u00e8ncia hi ha entre la PRV55 i la PRV54?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Totes dues s\u00f3n de DN15 a DN25, PN25 i aptes per a vapor. La PRV55 porta actuador de membrana i tara des de 0,01 fins a 8 barg, fins a 150 \u00b0C. La <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv54\/\">PRV54<\/a> est\u00e0 equilibrada per manxa, tara de 0,5 a 12 barg i admet fins a 210 \u00b0C.<\/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\">No necessita manteniment peri\u00f2dic, per\u00f2 les peces de desgast s'han de revisar segons les condicions de servei. En zones ATEX, el manual indica canviar les juntes cada 25.000 hores o quan ho aconsellin les inspeccions. Es pot fer amb el cos instal\u00b7lat, despressuritzat i a\u00efllat.<\/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 PRV55 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), segons la classe t\u00e8rmica que correspongui a la temperatura del fluid. Vegi el nostre article sobre v\u00e0lvules ATEX.<\/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-model-prv54\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV30-44-700x700-1.jpg\" alt=\"Exc\u00e9s de pressi\u00f3 PRV54\" class=\"wp-image-181\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Exc\u00e9s de pressi\u00f3 PRV54<\/b><span>Amb manxa: tarat de 0,5 a 12 barg i vapor fins a 210 \u00b0C.<\/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-PRV30-44-700x700-1.jpg\" alt=\"Exc\u00e9s de pressi\u00f3 PRV53\" class=\"wp-image-181\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Exc\u00e9s de pressi\u00f3 PRV53<\/b><span>Inox 316L, tarat fins a 15 barg i fins a 150 \u00b0C, sense vapor.<\/span><\/a><\/li><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-700x700-1.jpg\" alt=\"Exc\u00e9s de pressi\u00f3 S1\" class=\"wp-image-192\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Exc\u00e9s de pressi\u00f3 S1<\/b><span>De DN15 a DN150 i PN40, per a vapor fins a 220 \u00b0C.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-s2\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\" alt=\"Exc\u00e9s de pressi\u00f3 S2\" class=\"wp-image-193\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Exc\u00e9s de pressi\u00f3 S2<\/b><span>De DN15 a DN100, PN40 i tarat des de 0,02 barg.<\/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=\"Alleujament de pressi\u00f3 S3\" class=\"wp-image-10230\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Alleujament de pressi\u00f3 S3<\/b><span>De DN15 a DN150, PN40, tarat fins a 20 barg i 220 \u00b0C.<\/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 PRV55<\/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 el rang de molla per a la seva pressi\u00f3 de tarat, i la membrana i les juntes adequades al fluid.<\/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>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-f592-o1\" lang=\"ca\" dir=\"ltr\" data-wpcf7-id=\"592\">\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\/791#wpcf7-f592-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=\"592\" \/><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-f592-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=\"1792703045.00886d93ef026ba6\" \/>\n<\/fieldset>\n<input class=\"wpcf7-form-control wpcf7-hidden\" value=\"PRV55\" 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=\"aire, nitrogen, vapor, 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\" placeholder=\"p. ex. 0,05\" value=\"\" type=\"text\" name=\"tarado\" \/><\/span><\/label><label>Pressi\u00f3 de servei (barg)<span class=\"wpcf7-form-control-wrap\" data-name=\"p_servicio\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"p_servicio\" \/><\/span><\/label><label>Cabal a descarregar<span class=\"wpcf7-form-control-wrap\" data-name=\"caudal\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"p. ex. 10 Nm\u00b3\/h o 2 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 PRV55 V\u00e0lvula d'exc\u00e9s de pressi\u00f3 \u00b7 Actuador de membrana V\u00e0lvula d'exc\u00e9s de pressi\u00f3 PRV55 Des de 10 mbar V\u00e0lvula autoregulada d'exc\u00e9s de pressi\u00f3, d'acci\u00f3 directa, amb actuador de membrana i cos i interiors d'acer inoxidable 316L. Descarrega l'exc\u00e9s quan la pressi\u00f3 aig\u00fces amunt supera el tarat, ajustable des ... <a title=\"V\u00e0lvula d&#039;exc\u00e9s de pressi\u00f3 PRV55\" class=\"read-more\" href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv55\/\" aria-label=\"M\u00e9s informaci\u00f3 sobre V\u00e0lvula d&#039;exc\u00e9s de pressi\u00f3 PRV55\">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 PRV55 de membrana | Valfonta","rank_math_description":"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 PRV55 amb actuador de membrana i interiors d'inox 316L. DN15 a DN25, PN25, tarat de 0,01 a 8 barg i vapor fins a 150 \u00b0C.","rank_math_focus_keyword":"","vf_jsonld":"[{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.valfonta.com\/#organization\",\"name\":\"Valfonta\",\"legalName\":\"Val Fonta, S.L.\",\"taxID\":\"B59935718\",\"url\":\"https:\/\/www.valfonta.com\/ca\/\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valfonta-logo.webp\"},\"foundingDate\":\"1962\",\"email\":\"valfonta@valfonta.com\",\"telephone\":\"+34 933 720 888\",\"address\":{\"@type\":\"PostalAddress\",\"streetAddress\":\"C\/ Bronze 26, Pol. Ind. 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-exces-de-pressio-model-prv55\/#webpage\",\"url\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv55\/\",\"name\":\"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 PRV55 de membrana | Valfonta\",\"description\":\"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 PRV55 amb actuador de membrana i interiors d'inox 316L. DN15 a DN25, PN25, tarat de 0,01 a 8 barg i vapor fins a 150 \u00b0C.\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"ca\",\"datePublished\":\"2020-02-05T12:10:25+02:00\",\"dateModified\":\"2026-03-19T14:24:42+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-exces-de-pressio-model-prv55\/#breadcrumb\"},\"mainEntity\":{\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv55\/#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-exces-de-pressio-model-prv55\/#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 PRV55\",\"item\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv55\/\"}]},{\"@type\":\"Product\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv55\/#product\",\"name\":\"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 PRV55\",\"url\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv55\/\",\"description\":\"V\u00e0lvula autoregulada d'exc\u00e9s de pressi\u00f3, d'acci\u00f3 directa, amb actuador de membrana i cos i interiors d'acer inoxidable 316L. Descarrega l'exc\u00e9s quan la pressi\u00f3 aig\u00fces amunt supera el tarat, ajustable des de 0,01 barg, en gasos, l\u00edquids i vapor fins a 150 \u00b0C.\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Valfonta\"},\"manufacturer\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"model\":\"PRV55\",\"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\":\"V\u00e0lvula d'exc\u00e9s de pressi\u00f3 autoregulada, d'acci\u00f3 directa, equilibrada per pist\u00f3, 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 \u00b7 Brides ANSI CL150 \u00b7 Clamp 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 tarat\",\"value\":\"0,01 a 8 barg, segons la mida de l'actuador i la molla\"},{\"@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 especial sota comanda\"},{\"@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, fuel-oil, aigua, nitrogen, gasos neutres\"},{\"@type\":\"PropertyValue\",\"name\":\"Materials\",\"value\":\"Cos i interiors en acer inoxidable AISI 316L. Membrana en EPDM o EPDM+PTFE. Actuador de xapa d'acer amb pintura epoxi\"},{\"@type\":\"PropertyValue\",\"name\":\"Presa de pressi\u00f3\",\"value\":\"Interna o externa. Externa necess\u00e0ria amb vapor i amb l\u00edquids a m\u00e9s de 125 \u00b0C\"},{\"@type\":\"PropertyValue\",\"name\":\"Posici\u00f3 de muntatge\",\"value\":\"Canonada horitzontal. Actuador cap avall amb qualsevol fluid i sempre amb vapor; cap amunt nom\u00e9s amb gasos i l\u00edquids fins a 80 \u00b0C\"},{\"@type\":\"PropertyValue\",\"name\":\"Directiva d'equips a pressi\u00f3\",\"value\":\"PED 2014\/68\/UE, article 4.3: no requereix marcatge CE (fluids dels grups 1 i 2)\"},{\"@type\":\"PropertyValue\",\"name\":\"ATEX\",\"value\":\"II 2 GD c IIC Tx \/ c IIIC Tx\u00baC \u00b7 certificat LOM 14.034 U\"},{\"@type\":\"PropertyValue\",\"name\":\"Sota comanda\",\"value\":\"Cos en bronze RG10 \u00b7 actuador d'acer inoxidable \u00b7 juntes especials \u00b7 Kv especial\"}],\"category\":\"V\u00e0lvules d'alleujament de pressi\u00f3\",\"subjectOf\":[{\"@type\":\"DigitalDocument\",\"name\":\"Fitxa t\u00e8cnica PRV55 (en angl\u00e8s)\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/PRV55-16B-ENG.pdf\",\"encodingFormat\":\"application\/pdf\"},{\"@type\":\"DigitalDocument\",\"name\":\"Manual de funcionament i instal\u00b7laci\u00f3 (en angl\u00e8s)\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Manual-PRV55-16B-ENG.pdf\",\"encodingFormat\":\"application\/pdf\"}]},{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-exces-de-pressio-model-prv55\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Quina pressi\u00f3 de tarat es pot ajustar amb la PRV55?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"De 0,01 a 8 barg, segons la mida de l'actuador i la molla (vegi la taula d'especificacions). La pressi\u00f3 m\u00e0xima d'entrada \u00e9s de 16 barg.\"}},{\"@type\":\"Question\",\"name\":\"Es pot fer servir amb vapor?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"S\u00ed, fins a 150 \u00b0C. Amb vapor es munta en canonada horitzontal amb l'actuador cap avall, amb l\u00ednia de control externa i amb tanc de condensaci\u00f3 ple d'aigua, que protegeix la membrana de la calor.\"}},{\"@type\":\"Question\",\"name\":\"Quina difer\u00e8ncia hi ha entre la PRV55 i la PRV54?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Totes dues s\u00f3n de DN15 a DN25, PN25 i aptes per a vapor. La PRV55 porta actuador de membrana i tara des de 0,01 fins a 8 barg, fins a 150 \u00b0C. La PRV54 est\u00e0 equilibrada per manxa, tara de 0,5 a 12 barg i admet fins a 210 \u00b0C.\"}},{\"@type\":\"Question\",\"name\":\"Quin manteniment necessita?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No necessita manteniment peri\u00f2dic, per\u00f2 les peces de desgast s'han de revisar segons les condicions de servei. En zones ATEX, el manual indica canviar les juntes cada 25.000 hores o quan ho aconsellin les inspeccions. Es pot fer amb el cos instal\u00b7lat, despressuritzat i a\u00efllat.\"}},{\"@type\":\"Question\",\"name\":\"Es pot instal\u00b7lar en una zona ATEX?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"S\u00ed. La PRV55 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), segons la classe t\u00e8rmica que correspongui a la temperatura del fluid. Vegi el nostre article sobre v\u00e0lvules ATEX.\"}}]}]}]"},"product_brand":[],"product_cat":[80],"product_tag":[],"class_list":["post-791","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\/791","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=791"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_brand?post=791"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_cat?post=791"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_tag?post=791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}