{"id":798,"date":"2026-10-02T13:17:52","date_gmt":"2026-10-02T11:17:52","guid":{"rendered":"https:\/\/www.valfonta.com\/producto\/valvula-reductora-de-pressio-model-vd\/"},"modified":"2026-10-22T09:23:35","modified_gmt":"2026-10-22T07:23:35","slug":"valvula-reductora-de-pressio-model-vd","status":"publish","type":"product","link":"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-vd\/","title":{"rendered":"V\u00e0lvula reductora de pressi\u00f3 VD"},"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 VD<\/span><\/p><\/nav><article class=\"wp-block-group vf-pdp vfd-model--VD 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 Pist\u00f3 guiat en 3 punts<\/p><h1 class=\"wp-block-heading\">V\u00e0lvula reductora de pressi\u00f3 VD<\/h1><\/div><div class=\"wp-block-group vf-pdp-media vf-photo is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><span class=\"vf-pdp-badge\">Novetat: vapor fins a 200 \u00b0C<\/span><\/p><figure class=\"wp-block-image vf-img-suelta\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-vd-perspectiva.webp\" alt=\"V\u00e0lvula reductora de pressi\u00f3 VD embridada, vista en perspectiva\" class=\"wp-image-10121\" width=\"900\" height=\"900\" fetchpriority=\"high\"><\/figure><div class=\"wp-block-group vf-pdp-thumbs is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><button aria-label=\"Veure la vista en perspectiva\" aria-pressed=\"true\" data-alt=\"V\u00e0lvula reductora de pressi\u00f3 VD embridada, vista en perspectiva\" data-vf-thumb=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-vd-perspectiva.webp\" type=\"button\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-vd-perspectiva-400.webp\" alt=\"\" class=\"wp-image-10116\" width=\"58\" height=\"58\" loading=\"lazy\"><\/button><button aria-label=\"Veure la vista frontal\" aria-pressed=\"false\" data-alt=\"V\u00e0lvula reductora de pressi\u00f3 VD embridada, vista frontal\" data-vf-thumb=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-vd-frontal.webp\" type=\"button\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-vd-frontal-400.webp\" alt=\"\" class=\"wp-image-10117\" width=\"58\" height=\"58\" loading=\"lazy\"><\/button><\/p><\/div><\/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 i seient simple, amb pist\u00f3 de regulaci\u00f3 guiat en 3 punts. Mant\u00e9 constant la pressi\u00f3 de sortida en vapor fins a 200 \u00b0C, l\u00edquids, aire comprimit i gasos neutres, de DN15 a DN100 i amb fins a 40 barg d'entrada. <strong>Novetat: la VD ja est\u00e0 disponible per a vapor fins a 200 \u00b0C.<\/strong><\/p><ul class=\"vf-pdp-keys wp-block-list\"><li><span>Di\u00e0metres<\/span><b>DN15 a DN100<\/b><\/li><li><span>Pressi\u00f3 nominal<\/span><b>PN16 a PN40 <small>ANSI 150 i 300<\/small><\/b><\/li><li><span>Pressi\u00f3 d'entrada<\/span><b>fins a 40 barg<\/b><\/li><li><span>Pressi\u00f3 de sortida<\/span><b>1,5 a 16 barg <small>est\u00e0ndard 1,5 a 8<\/small><\/b><\/li><li><span>Temperatura<\/span><b>\u221220 a 200 \u00b0C <small>amb juntes AFLAS<\/small><\/b><\/li><li><span>Kv<\/span><b>3,5 a 115 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\/VD-18A-ESP-2026.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>Pintura epoxi al forn de gran duresa<\/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 VD<\/h2><p class=\"wp-block-paragraph\">La <strong>VD<\/strong> \u00e9s la <a href=\"https:\/\/www.valfonta.com\/ca\/valvules-reductores-de-pressio\/\">v\u00e0lvula reductora de pressi\u00f3<\/a> de pist\u00f3 de Valfonta per a di\u00e0metres mitjans i grans: va de DN15 a DN100, amb brides EN o ANSI o rosca fins a 2\u2033. Funciona per acci\u00f3 directa, sense energia auxiliar, i absorbeix les variacions de la pressi\u00f3 d'entrada gr\u00e0cies a un forat de compensaci\u00f3 intern a l'eix.<\/p><p class=\"wp-block-paragraph\">El cos es fabrica en <strong>bronze, acer al carboni o acer inoxidable<\/strong>, amb interiors d'acer inoxidable, i es protegeix amb pintura epoxi al forn. \u00c9s d'ajust molt senzill i el seu disseny interior facilita una circulaci\u00f3 efica\u00e7 del fluid. Entre els seus usos hi ha les xarxes de distribuci\u00f3 d'aigua i les instal\u00b7lacions contra incendis.<\/p><ul class=\"vf-pdp-apps wp-block-list\"><li><b>Xarxes de vapor<\/b><span>Novetat: reducci\u00f3 de la pressi\u00f3 de vapor fins a 200 \u00b0C, de DN15 a DN100.<\/span><\/li><li><b>Xarxes de distribuci\u00f3 d'aigua<\/b><span>Reducci\u00f3 i estabilitzaci\u00f3 de la pressi\u00f3 a la xarxa.<\/span><\/li><li><b>Contra incendis i ruixadors<\/b><span>Regulaci\u00f3 de la pressi\u00f3 en sistemes de ruixadors.<\/span><\/li><li><b>Aig\u00fces residuals<\/b><span>Instal\u00b7lacions d'aig\u00fces residuals.<\/span><\/li><li><b>Aire comprimit industrial<\/b><span>Reducci\u00f3 de la pressi\u00f3 de xarxa per als consums.<\/span><\/li><li><b>Fuel-oil<\/b><span>L\u00ednies d'alimentaci\u00f3 de combustible l\u00edquid.<\/span><\/li><li><b>Laboratoris i instal\u00b7lacions sanit\u00e0ries<\/b><span>Instal\u00b7lacions qu\u00edmiques de laboratori i sanit\u00e0ries.<\/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 VD si\u2026<\/h3><ul class=\"vf-si wp-block-list\"><li>Treballa amb vapor fins a 200 \u00b0C, aigua, fuel-oil, aire comprimit o gasos neutres.<\/li><li>Necessita di\u00e0metres de DN15 a DN100 o cabals alts, amb Kv de fins a 115 m\u00b3\/h.<\/li><li>La pressi\u00f3 d'entrada arriba a 40 barg.<\/li><li>Vol triar el material del cos: bronze, acer al carboni o acer inoxidable.<\/li><\/ul><h3 class=\"wp-block-heading\">Millor un altre model si\u2026<\/h3><ul class=\"vf-no wp-block-list\"><li>El vapor supera els 200 \u00b0C: vegi la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-autoaccionada\/\">M1<\/a> (fins a 220 \u00b0C).<\/li><li>Necessita pressions de sortida per sota d'1,5 barg: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio\/\">M2<\/a> regula des de 0,02 barg i la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv45\/\">PRV45<\/a>, des de 0,01 barg.<\/li><li>Necessita m\u00e9s de DN100: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-autoaccionada\/\">M1<\/a> arriba a DN150.<\/li><li>Treballa amb di\u00e0metres molt petits: la <a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-a-pisto-model-prv20\/\">PRV20<\/a> va de \u00bc\u2033 a \u00be\u2033 i tamb\u00e9 admet 40 bar.<\/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 VD<\/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 i seient simple, amb pist\u00f3 guiat en 3 punts<\/td><\/tr><tr><th scope=\"row\">Di\u00e0metres<\/th><td>DN15, 20, 25, 32, 40, 50, 65, 80 i 100<\/td><\/tr><tr><th scope=\"row\">Connexions<\/th><td>Brides DIN PN16, PN25 i PN40 \u00b7 Brides ANSI classe 150 i 300 \u00b7 Rosca femella BSP o NPT fins a 2\u2033<\/td><\/tr><tr><th scope=\"row\">Pressi\u00f3 nominal<\/th><td>PN16 \u2013 PN25 \u2013 PN40 o classe 150 \u2013 classe 300<\/td><\/tr><tr><th scope=\"row\">Pressi\u00f3 m\u00e0xima d'entrada<\/th><td>40 barg<\/td><\/tr><tr><th scope=\"row\">Pressi\u00f3 diferencial m\u00e0xima (\u0394p)<\/th><td>25 bar (DN15 a DN50) \u00b7 20 bar (DN65 i DN80) \u00b7 16 bar (DN100)<\/td><\/tr><tr><th scope=\"row\">Rang de pressi\u00f3 de sortida<\/th><td>1,5 a 16 barg (est\u00e0ndard, d'1,5 a 8 barg)<\/td><\/tr><tr><th scope=\"row\">Coeficient Kv<\/th><td>Des de 3,5 m\u00b3\/h (DN15) fins a 115 m\u00b3\/h (DN100)<\/td><\/tr><tr><th scope=\"row\">Temperatura<\/th><td>\u221220 a +200 \u00b0C (amb juntes AFLAS)<\/td><\/tr><tr><th scope=\"row\">Fluids<\/th><td>Vapor (fins a 200 \u00b0C), l\u00edquids, aire comprimit i gasos neutres<\/td><\/tr><tr><th scope=\"row\">Material del cos<\/th><td>Bronze RG10, acer al carboni WCB o acer inoxidable CF3M<\/td><\/tr><tr><th scope=\"row\">Interiors<\/th><td>Acer inoxidable 316L (1.4404); bronze opcional<\/td><\/tr><tr><th scope=\"row\">Acabat<\/th><td>Pintura epoxi al forn de gran duresa<\/td><\/tr><tr><th scope=\"row\">Posici\u00f3 de muntatge<\/th><td>Recomanada en canonada horitzontal; hi ha posicions permeses i una de no recomanada<\/td><\/tr><tr><th scope=\"row\">Directiva d'equips a pressi\u00f3<\/th><td>PED 2014\/68\/UE: segons el di\u00e0metre i la pressi\u00f3, amb marcatge CE o sense (ho indica la xapa)<\/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, pes i Kv<\/h3><div class=\"wp-block-group vf-tbl-wrap is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-table vf-tbl vf-tbl--grid\"><table><thead><tr><th scope=\"col\"><\/th><th scope=\"col\">DN15<\/th><th scope=\"col\">DN20<\/th><th scope=\"col\">DN25<\/th><th scope=\"col\">DN32<\/th><th scope=\"col\">DN40<\/th><th scope=\"col\">DN50<\/th><th scope=\"col\">DN65<\/th><th scope=\"col\">DN80<\/th><th scope=\"col\">DN100<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">Kv (m\u00b3\/h)<\/th><td>3,5<\/td><td>5<\/td><td>9<\/td><td>13,5<\/td><td>22<\/td><td>32<\/td><td>57<\/td><td>82<\/td><td>115<\/td><\/tr><tr><th scope=\"row\">Cv (gpm)<\/th><td>4<\/td><td>5,8<\/td><td>10,4<\/td><td>15,6<\/td><td>25<\/td><td>37<\/td><td>66<\/td><td>95<\/td><td>134<\/td><\/tr><tr><th scope=\"row\">Longitud A, brides DIN<\/th><td>130<\/td><td>150<\/td><td>160<\/td><td>180<\/td><td>200<\/td><td>230<\/td><td>290<\/td><td>310<\/td><td>350<\/td><\/tr><tr><th scope=\"row\">Longitud A, ANSI 150<\/th><td>\u2013<\/td><td>\u2013<\/td><td>184<\/td><td>\u2013<\/td><td>222<\/td><td>254<\/td><td>276<\/td><td>298,5<\/td><td>352,5<\/td><\/tr><tr><th scope=\"row\">Longitud A, ANSI 300<\/th><td>\u2013<\/td><td>\u2013<\/td><td>197<\/td><td>\u2013<\/td><td>235<\/td><td>267<\/td><td>292<\/td><td>317,5<\/td><td>\u2013<\/td><\/tr><tr><th scope=\"row\">Rosca BSP \/ NPT<\/th><td>\u00bd\u2033<\/td><td>\u00be\u2033<\/td><td>1\u2033<\/td><td>1\u00bc\u2033<\/td><td>1\u00bd\u2033<\/td><td>2\u2033<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><th scope=\"row\">Cota L<\/th><td>240<\/td><td>240<\/td><td>250<\/td><td>250<\/td><td>300<\/td><td>300<\/td><td>415<\/td><td>430<\/td><td>490<\/td><\/tr><tr><th scope=\"row\">Pes (kg)<\/th><td>10<\/td><td>10<\/td><td>12<\/td><td>13<\/td><td>16<\/td><td>18<\/td><td>35<\/td><td>50<\/td><td>60<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Mides en mil\u00b7l\u00edmetres. Els pl\u00e0nols acotats s\u00f3n a la fitxa t\u00e8cnica en PDF.<\/p><h3 class=\"wp-block-heading\">Possibles avaries i solucions<\/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\">S\u00edmptoma<\/th><th scope=\"col\">Possible causa<\/th><th scope=\"col\">Soluci\u00f3 recomanada<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">La pressi\u00f3 sobrepassa l'ajust<\/th><td>Seient i obturador desgastats<\/td><td>Substituir els components desgastats<\/td><\/tr><tr><th scope=\"row\">La pressi\u00f3 cau per sota de l'ajust<\/th><td>V\u00e0lvula muntada al rev\u00e9s; Kv massa petit; obturador bloquejat<\/td><td>Revisar la fletxa del cos i el dimensionament; substituir les peces danyades<\/td><\/tr><tr><th scope=\"row\">Desajustos en el control<\/th><td>Part\u00edcules entre el seient i l'obturador<\/td><td>Eliminar les part\u00edcules i substituir les peces danyades<\/td><\/tr><tr><th scope=\"row\">Pressi\u00f3 d'entrada fluctuant<\/th><td>V\u00e0lvula massa gran<\/td><td>Triar un Kv inferior si cal<\/td><\/tr><tr><th scope=\"row\">Soroll fort<\/th><td>Velocitat del flux elevada; cavitaci\u00f3<\/td><td>Comprovar el dimensionament; en gasos, instal\u00b7lar un difusor de flux<\/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>Bronze RG10, acer al carboni WCB o acer inox. CF3M<\/td><\/tr><tr><th scope=\"row\">2<\/th><td>Seient<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">3<\/th><td>Eix (DN65 a DN100)<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">4<\/th><td>Volandera<\/td><td>Acer inox. A2-70<\/td><\/tr><tr><th scope=\"row\">5<\/th><td>Cargols<\/td><td>Acer inox. A2-70<\/td><\/tr><tr><th scope=\"row\">6<\/th><td>Pist\u00f3<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">7<\/th><td>\u00c8mbol<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">8<\/th><td>Junta t\u00f2rica de seguretat<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">9<\/th><td>Tapa del caputx\u00f3<\/td><td>Acer inox. CF3M<\/td><\/tr><tr><th scope=\"row\">10<\/th><td>Molla<\/td><td>Acer per a molles amb pintura epoxi (60\u2013100 micres)<\/td><\/tr><tr><th scope=\"row\">11<\/th><td>Femella de regulaci\u00f3<\/td><td>Acer galvanitzat 1.1191<\/td><\/tr><tr><th scope=\"row\">12<\/th><td>Coixinet pla<\/td><td>PTFE + grafit<\/td><\/tr><tr><th scope=\"row\">13<\/th><td>Eix de regulaci\u00f3<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">14<\/th><td>Volandera de seguretat<\/td><td>Acer inox. A2-70<\/td><\/tr><tr><th scope=\"row\">15<\/th><td>Junta t\u00f2rica<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">16<\/th><td>Eix del pist\u00f3<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">17<\/th><td>Femella<\/td><td>Acer inox. A2-70<\/td><\/tr><tr><th scope=\"row\">18<\/th><td>Junta t\u00f2rica<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">19<\/th><td>Guia de l'\u00e8mbol<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">20<\/th><td>Junta t\u00f2rica<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">21<\/th><td>Junta plana<\/td><td>PTFE<\/td><\/tr><tr><th scope=\"row\">22<\/th><td>Junta t\u00f2rica<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">26<\/th><td>\u00c8mbol de compensaci\u00f3<\/td><td>NBR o PTFE + grafit + inox 302<\/td><\/tr><tr><th scope=\"row\">27<\/th><td>Guia inferior del casquet<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">28<\/th><td>Obturador<\/td><td>NBR o PTFE grafitat<\/td><\/tr><tr><th scope=\"row\">29<\/th><td>Cargol de l'obturador<\/td><td>Acer inox. A2-70<\/td><\/tr><tr><th scope=\"row\">30<\/th><td>Guia de l'obturador (DN65 a DN100)<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">31<\/th><td>Suport de l'obturador<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">41<\/th><td>Eix del casquet inferior (DN100)<\/td><td>Acer inox. AISI 316L<\/td><\/tr><tr><th scope=\"row\">42<\/th><td>Junta t\u00f2rica (DN100)<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">43<\/th><td>Volandera de la molla (DN100)<\/td><td>Acer inox. AISI 316L<\/td><\/tr><tr><th scope=\"row\">44<\/th><td>Cargols (DN100)<\/td><td>Acer inox. A2-70<\/td><\/tr><tr><th scope=\"row\">51<\/th><td>Eix, substitueix 3 i 30 (DN15 a DN50)<\/td><td>1.4404 (316L)<\/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\">VD.SP1<\/th><td>Juntes i tancaments<\/td><td>7, 8, 18, 20, 21, 22, 26 i 28 (i 42 en DN100)<\/td><\/tr><tr><th scope=\"row\">VD.SP2<\/th><td>Molla<\/td><td>10<\/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 VD<\/h2><p class=\"wp-block-paragraph\">La VD treballa per equilibri de forces sobre el pist\u00f3 de regulaci\u00f3. No necessita aire, electricitat ni preses de pressi\u00f3 externes.<\/p><ol class=\"vf-steps wp-block-list\"><li><b>Tancament per la pressi\u00f3 d'entrada.<\/b> La pressi\u00f3 aig\u00fces amunt arriba a la v\u00e0lvula i empeny el pist\u00f3 cap amunt, cosa que tanca el pas.<\/li><li><b>Obertura amb la molla.<\/b> Amb la v\u00e0lvula tancada, en girar en sentit horari el cargol de regulaci\u00f3 (13) es comprimeix la molla (10), que actua sobre el casquet i el tancament i obre la v\u00e0lvula.<\/li><li><b>Regulaci\u00f3.<\/b> La v\u00e0lvula obre el pas fins que s'assoleix la pressi\u00f3 aig\u00fces avall ajustada.<\/li><li><b>Compensaci\u00f3.<\/b> Les variacions de la pressi\u00f3 d'entrada s'absorbeixen mitjan\u00e7ant la compensaci\u00f3 de la secci\u00f3 superior del casquet, comunicada pel forat intern de l'eix (51).<\/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 VD<\/h2><p class=\"wp-block-paragraph\">Valfonta recomana instal\u00b7lar la VD amb bypass, segons aquest esquema, per poder fer el manteniment sense aturar el servei. Si vol m\u00e9s detall, consulti 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><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 d'a\u00efllament (1, 1a) i de bypass (1b)<\/li><li>Filtre<\/li><li>Man\u00f2metre d'entrada<\/li><li>Reductora VD<\/li><li>V\u00e0lvula de seguretat<\/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 d'instal\u00b7lar la v\u00e0lvula, perqu\u00e8 cap impuresa no n'afecti el funcionament.<\/li><li><b>Instal\u00b7li un filtre<\/b> a l'entrada de la v\u00e0lvula per protegir-la.<\/li><li><b>Munti la v\u00e0lvula en canonada horitzontal<\/b> i respecti la fletxa del cos. Hi ha una posici\u00f3 no recomanada, en qu\u00e8 podria no funcionar 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>Posi en marxa a poc a poc:<\/b> obri lentament les v\u00e0lvules de tancament per evitar cops d'ariet.<\/li><li><b>Ajusti la pressi\u00f3 de sortida<\/b> amb el cargol de regulaci\u00f3 (13): girant-lo en sentit horari es comprimeix la molla i augmenta la pressi\u00f3; en sentit antihorari, disminueix.<\/li><\/ol><p class=\"wp-block-paragraph\">Per al manteniment, afluixi del tot la femella de regulaci\u00f3 per destensar la molla i asseguri's que no hi ha pressi\u00f3 a la canonada ni a la v\u00e0lvula i que la seva temperatura \u00e9s l'ambient. El seient es desmunta amb una eina especial, el pl\u00e0nol de la qual pot demanar a Valfonta. Si hi ha soroll o la pressi\u00f3 no es mant\u00e9, vegi la taula d'avaries i els nostres articles sobre problemes de les reductores i cavitaci\u00f3 en reductores.<\/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 VD<\/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 VD<\/b><span>PDF \u00b7 4 p\u00e0gines \u00b7 caracter\u00edstiques, especejament, dimensions i esquema d'instal\u00b7laci\u00f3<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/wp-content\/uploads\/2026\/10\/VD-18A-ESP-2026.pdf\" aria-label=\"PDF Fitxa t\u00e8cnica VD PDF \u00b7 4 p\u00e0gines \u00b7 caracter\u00edstiques, especejament, dimensions i esquema d&#x27;instal\u00b7laci\u00f3\" 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 14 p\u00e0gines \u00b7 instal\u00b7laci\u00f3, ATEX, avaries, 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-VD-18B-ESP.pdf\" aria-label=\"PDF Manual de funcionament i instal\u00b7laci\u00f3 PDF \u00b7 14 p\u00e0gines \u00b7 instal\u00b7laci\u00f3, ATEX, avaries, desmuntatge 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 VD comparada amb altres reductores de Valfonta<\/h2><p class=\"wp-block-paragraph\">La VD \u00e9s la reductora de pist\u00f3 de m\u00e9s di\u00e0metre 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>VD<\/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-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-prv45\/\">PRV45<\/a><\/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-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). Si dubta entre pist\u00f3 i membrana, llegeixi la nostra comparativa de reductores de pist\u00f3 i 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 VD<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Es pot fer servir la VD amb vapor?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">S\u00ed. \u00c9s una novetat de la gamma: la VD ja est\u00e0 disponible per a vapor fins a 200 \u00b0C, amb juntes AFLAS. Indiqui'ns la pressi\u00f3 i la temperatura del vapor i li confirmarem la configuraci\u00f3.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Quina pressi\u00f3 de sortida es pot ajustar?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">El rang de sortida va d'1,5 a 16 barg; el rang est\u00e0ndard \u00e9s d'1,5 a 8 barg. La pressi\u00f3 d'entrada pot arribar a 40 barg, amb una pressi\u00f3 diferencial m\u00e0xima de 25 bar fins a DN50, 20 bar en DN65 i DN80, i 16 bar en DN100.<\/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 el cargol de regulaci\u00f3 (13). Girant-lo en sentit horari es comprimeix la molla i augmenta la pressi\u00f3 de sortida; en sentit antihorari, 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. Les juntes, el seient, l'eix i l'obturador pateixen un desgast normal i se substitueixen quan cal; es pot fer amb el cos instal\u00b7lat, despressuritzat i a\u00efllat. Hi ha dos recanvis: juntes i tancaments (VD.SP1) i molla (VD.SP2).<\/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 VD 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>Inox 316L, de DN15 a DN25 i fins a 25 bar.<\/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-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>DN15\u201325, equilibrada per manxa i per a vapor fins a 210 \u00b0C.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-prv45\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV45-55-700x700-1.jpg\" alt=\"Reductora PRV45\" class=\"wp-image-191\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Reductora PRV45<\/b><span>Sortides molt baixes, des de 0,01 barg, i vapor.<\/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 vapor fins a 180 \u00b0C.<\/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 VD<\/h2><p class=\"wp-block-paragraph\">Indiqui'ns les dades de la seva instal\u00b7laci\u00f3 i li recomanarem el di\u00e0metre, el material del cos i les juntes adequades.<\/p><ul class=\"wp-block-list\"><li>Fluid i temperatura de servei<\/li><li>Pressi\u00f3 d'entrada i pressi\u00f3 de sortida desitjada<\/li><li>Cabal m\u00e0xim i m\u00ednim<\/li><li>Material del cos i connexi\u00f3 (brides DIN, ANSI o rosca)<\/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-f599-o1\" lang=\"ca\" dir=\"ltr\" data-wpcf7-id=\"599\">\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\/798#wpcf7-f599-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=\"599\" \/><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-f599-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/><input type=\"hidden\" name=\"_vf_t\" value=\"1792703033.dcb93af8211681b0\" \/>\n<\/fieldset>\n<input class=\"wpcf7-form-control wpcf7-hidden\" value=\"VD\" 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\">DN15<\/option><option value=\"DN20\">DN20<\/option><option value=\"DN25\">DN25<\/option><option value=\"DN32\">DN32<\/option><option value=\"DN40\">DN40<\/option><option value=\"DN50\">DN50<\/option><option value=\"DN65\">DN65<\/option><option value=\"DN80\">DN80<\/option><option value=\"DN100\">DN100<\/option><option value=\"No ho s\u00e9\">No ho s\u00e9<\/option><\/select><\/span><\/label><label>Fluid<span class=\"wpcf7-form-control-wrap\" data-name=\"fluido\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"aigua, aire, fuel-oil\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 (barg)<span class=\"wpcf7-form-control-wrap\" data-name=\"p_salida\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" 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. 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 reductores de pressi\u00f3\u203aV\u00e0lvula reductora de pressi\u00f3 VD V\u00e0lvula reductora de pressi\u00f3 \u00b7 Pist\u00f3 guiat en 3 punts V\u00e0lvula reductora de pressi\u00f3 VD Novetat: vapor fins a 200 \u00b0C Reductora autoregulada d'acci\u00f3 directa i seient simple, amb pist\u00f3 de regulaci\u00f3 guiat en 3 punts. Mant\u00e9 constant la pressi\u00f3 de sortida en vapor fins a 200 ... <a title=\"V\u00e0lvula reductora de pressi\u00f3 VD\" class=\"read-more\" href=\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-vd\/\" aria-label=\"M\u00e9s informaci\u00f3 sobre V\u00e0lvula reductora de pressi\u00f3 VD\">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 VD, DN15 a DN100 | Valfonta","rank_math_description":"Reductora de pressi\u00f3 VD d'acci\u00f3 directa amb pist\u00f3 guiat en 3 punts. DN15 a DN100, entrada fins a 40 barg, sortida de 1,5 a 16 barg i vapor fins a 200 \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-reductora-de-pressio-model-vd\/#webpage\",\"url\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-vd\/\",\"name\":\"V\u00e0lvula reductora de pressi\u00f3 VD, DN15 a DN100 | Valfonta\",\"description\":\"Reductora de pressi\u00f3 VD d'acci\u00f3 directa amb pist\u00f3 guiat en 3 punts. DN15 a DN100, entrada fins a 40 barg, sortida de 1,5 a 16 barg i vapor fins a 200 \u00b0C.\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"ca\",\"datePublished\":\"2020-02-05T11:14:29+02:00\",\"dateModified\":\"2026-03-19T14:29:18+02:00\",\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-VD-2016-700x700-1.jpg\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-vd\/#breadcrumb\"},\"mainEntity\":{\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-vd\/#product\"}},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-VD-2016-700x700-1.jpg\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-VD-2016-700x700-1.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-vd\/#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 VD\",\"item\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-vd\/\"}]},{\"@type\":\"Product\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-vd\/#product\",\"name\":\"V\u00e0lvula reductora de pressi\u00f3 VD\",\"url\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-vd\/\",\"description\":\"Reductora autoregulada d'acci\u00f3 directa i seient simple, amb pist\u00f3 de regulaci\u00f3 guiat en 3 punts. Mant\u00e9 constant la pressi\u00f3 de sortida en vapor fins a 200 \u00b0C, l\u00edquids, aire comprimit i gasos neutres, de DN15 a DN100 i amb fins a 40 barg d'entrada. Novetat: la VD ja est\u00e0 disponible per a vapor fins a 200 \u00b0C.\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Valfonta\"},\"manufacturer\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"model\":\"VD\",\"image\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-VD-2016-700x700-1.jpg\",\"material\":\"Bronze RG10, acer al carboni WCB o acer inoxidable CF3M\",\"additionalProperty\":[{\"@type\":\"PropertyValue\",\"name\":\"Tipus\",\"value\":\"Reductora de pressi\u00f3 autoregulada, d'acci\u00f3 directa i seient simple, amb pist\u00f3 guiat en 3 punts\"},{\"@type\":\"PropertyValue\",\"name\":\"Di\u00e0metres\",\"value\":\"DN15, 20, 25, 32, 40, 50, 65, 80 i 100\"},{\"@type\":\"PropertyValue\",\"name\":\"Connexions\",\"value\":\"Brides DIN PN16, PN25 i PN40 \u00b7 Brides ANSI classe 150 i 300 \u00b7 Rosca femella BSP o NPT fins a 2\u2033\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressi\u00f3 nominal\",\"value\":\"PN16 \u2013 PN25 \u2013 PN40 o classe 150 \u2013 classe 300\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressi\u00f3 m\u00e0xima d'entrada\",\"value\":\"40 barg\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressi\u00f3 diferencial m\u00e0xima (\u0394p)\",\"value\":\"25 bar (DN15 a DN50) \u00b7 20 bar (DN65 i DN80) \u00b7 16 bar (DN100)\"},{\"@type\":\"PropertyValue\",\"name\":\"Rang de pressi\u00f3 de sortida\",\"value\":\"1,5 a 16 barg (est\u00e0ndard, d'1,5 a 8 barg)\"},{\"@type\":\"PropertyValue\",\"name\":\"Coeficient Kv\",\"value\":\"Des de 3,5 m\u00b3\/h (DN15) fins a 115 m\u00b3\/h (DN100)\"},{\"@type\":\"PropertyValue\",\"name\":\"Temperatura\",\"value\":\"\u221220 a +200 \u00b0C (amb juntes AFLAS)\"},{\"@type\":\"PropertyValue\",\"name\":\"Fluids\",\"value\":\"Vapor (fins a 200 \u00b0C), l\u00edquids, aire comprimit i gasos neutres\"},{\"@type\":\"PropertyValue\",\"name\":\"Material del cos\",\"value\":\"Bronze RG10, acer al carboni WCB o acer inoxidable CF3M\"},{\"@type\":\"PropertyValue\",\"name\":\"Interiors\",\"value\":\"Acer inoxidable 316L (1.4404); bronze opcional\"},{\"@type\":\"PropertyValue\",\"name\":\"Acabat\",\"value\":\"Pintura epoxi al forn de gran duresa\"},{\"@type\":\"PropertyValue\",\"name\":\"Posici\u00f3 de muntatge\",\"value\":\"Recomanada en canonada horitzontal; hi ha posicions permeses i una de no recomanada\"},{\"@type\":\"PropertyValue\",\"name\":\"Directiva d'equips a pressi\u00f3\",\"value\":\"PED 2014\/68\/UE: segons el di\u00e0metre i la pressi\u00f3, amb marcatge CE o sense (ho indica la xapa)\"},{\"@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 VD\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/VD-18A-ESP-2026.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-VD-18B-ESP.pdf\",\"encodingFormat\":\"application\/pdf\"}]},{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.valfonta.com\/ca\/producte\/valvula-reductora-de-pressio-model-vd\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Es pot fer servir la VD amb vapor?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"S\u00ed. \u00c9s una novetat de la gamma: la VD ja est\u00e0 disponible per a vapor fins a 200 \u00b0C, amb juntes AFLAS. Indiqui'ns la pressi\u00f3 i la temperatura del vapor i li confirmarem la configuraci\u00f3.\"}},{\"@type\":\"Question\",\"name\":\"Quina pressi\u00f3 de sortida es pot ajustar?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"El rang de sortida va d'1,5 a 16 barg; el rang est\u00e0ndard \u00e9s d'1,5 a 8 barg. La pressi\u00f3 d'entrada pot arribar a 40 barg, amb una pressi\u00f3 diferencial m\u00e0xima de 25 bar fins a DN50, 20 bar en DN65 i DN80, i 16 bar en DN100.\"}},{\"@type\":\"Question\",\"name\":\"Com s'ajusta la pressi\u00f3 de sortida?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Amb el cargol de regulaci\u00f3 (13). Girant-lo en sentit horari es comprimeix la molla i augmenta la pressi\u00f3 de sortida; en sentit antihorari, 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. Les juntes, el seient, l'eix i l'obturador pateixen un desgast normal i se substitueixen quan cal; es pot fer amb el cos instal\u00b7lat, despressuritzat i a\u00efllat. Hi ha dos recanvis: juntes i tancaments (VD.SP1) i molla (VD.SP2).\"}},{\"@type\":\"Question\",\"name\":\"Es pot instal\u00b7lar en una zona ATEX?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"S\u00ed. La VD 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-798","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\/798","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=798"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_brand?post=798"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_cat?post=798"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/ca\/wp-json\/wp\/v2\/product_tag?post=798"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}