{"id":665,"date":"2026-10-02T13:17:52","date_gmt":"2026-10-02T11:17:52","guid":{"rendered":"https:\/\/www.valfonta.com\/producto\/pressure-reducing-valve-vd\/"},"modified":"2026-10-22T09:21:56","modified_gmt":"2026-10-22T07:21:56","slug":"pressure-reducing-valve-vd","status":"publish","type":"product","link":"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/","title":{"rendered":"VD pressure reducing valve"},"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--Breadcrumbs is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a href=\"\/en\/\">Home<\/a><span aria-hidden=\"true\" class=\"vf-sep\">\u203a<\/span><a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">Pressure reducing valves<\/a><span aria-hidden=\"true\" class=\"vf-sep\">\u203a<\/span><span aria-current=\"page\">VD pressure reducing valve<\/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\">Pressure reducing valve \u00b7 3-point guided piston<\/p><h1 class=\"wp-block-heading\">VD pressure reducing valve<\/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\">New: steam up to 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=\"Flanged VD pressure reducing valve, perspective view\" 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=\"Show perspective view\" aria-pressed=\"true\" data-alt=\"Flanged VD pressure reducing valve, perspective view\" 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=\"Show front view\" aria-pressed=\"false\" data-alt=\"Flanged VD pressure reducing valve, front view\" 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\">Self-regulating, direct-acting, single-seat reducing valve with a regulating piston guided at 3 points. It keeps the outlet pressure constant on steam up to 200 \u00b0C, liquids, compressed air, and inert gases, from DN15 to DN100 and with up to 40 barg inlet pressure. <strong>New: the VD is now available for steam up to 200 \u00b0C.<\/strong><\/p><ul class=\"vf-pdp-keys wp-block-list\"><li><span>Sizes<\/span><b>DN15 to DN100<\/b><\/li><li><span>Pressure rating<\/span><b>PN16 to PN40 <small>ANSI 150 and 300<\/small><\/b><\/li><li><span>Inlet pressure<\/span><b>up to 40 barg<\/b><\/li><li><span>Outlet pressure<\/span><b>1.5 to 16 barg <small>standard 1.5 to 8<\/small><\/b><\/li><li><span>Temperature<\/span><b>\u221220 to 200 \u00b0C <small>with AFLAS gaskets<\/small><\/b><\/li><li><span>Kv<\/span><b>3.5 to 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\">Request a quote<\/a><a class=\"vf-btn vf-btn--sec\" href=\"\/wp-content\/uploads\/2026\/10\/VD-18A-ENG.pdf\" rel=\"noopener\" target=\"_blank\">Download datasheet <small>PDF<\/small><\/a><\/p><\/div><p class=\"vf-pdp-contact wp-block-paragraph\">Questions about sizing? Call <a href=\"tel:+34933720888\">933 720 888<\/a> or email <a href=\"mailto:valfonta@valfonta.com\">valfonta@valfonta.com<\/a>.<\/p><\/div><\/div><ul class=\"vf-pdp-trust wp-block-list\"><li>In-house design and manufacturing in Badalona<\/li><li>ATEX II 2 GD marking for zones 1 and 21<\/li><li>High-hardness baked epoxy paint<\/li><li>Genuine spare parts available<\/li><\/ul><nav class=\"wp-block-group vf-pdp-nav vfa-aria-label--Datasheet%20contents is-layout-flow wp-block-group-is-layout-flow\"><ul class=\"wp-block-list\"><li><a href=\"#aplicaciones\">Applications<\/a><\/li><li><a href=\"#especificaciones\">Specifications<\/a><\/li><li><a href=\"#funcionamiento\">Operation<\/a><\/li><li><a href=\"#instalacion\">Installation<\/a><\/li><li><a href=\"#documentacion\">Documentation<\/a><\/li><li><a href=\"#comparar\">Compare<\/a><\/li><li><a href=\"#preguntas\">FAQ<\/a><\/li><li><a href=\"#solicitar\">Request a quote<\/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\">What the VD is used for<\/h2><p class=\"wp-block-paragraph\">The <strong>VD<\/strong> is Valfonta's piston <a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">pressure reducing valve<\/a> for medium and large sizes: it ranges from DN15 to DN100, with EN or ANSI flanges or threads up to 2\u2033. It operates by direct action, with no auxiliary power, and absorbs inlet pressure variations thanks to an internal compensation hole in the stem.<\/p><p class=\"wp-block-paragraph\">The body is made of <strong>bronze, carbon steel, or stainless steel<\/strong>, with stainless steel internals, and is protected with baked epoxy paint. It is very easy to adjust, and its internal design ensures efficient fluid flow. Its uses include <a href=\"https:\/\/www.valfonta.com\/en\/blog\/water-pressure-reducing-valve\/\">water distribution networks<\/a> and fire protection installations.<\/p><ul class=\"vf-pdp-apps wp-block-list\"><li><b>Steam networks<\/b><span>New: steam pressure reduction up to 200 \u00b0C, from DN15 to DN100.<\/span><\/li><li><b>Water distribution networks<\/b><span>Pressure reduction and stabilization in the network.<\/span><\/li><li><b>Fire protection and sprinklers<\/b><span>Pressure regulation in sprinkler systems.<\/span><\/li><li><b>Wastewater<\/b><span>Wastewater installations.<\/span><\/li><li><b>Industrial compressed air<\/b><span>Reduction of network pressure for points of use.<\/span><\/li><li><b>Fuel oil<\/b><span>Liquid fuel supply lines.<\/span><\/li><li><b>Laboratories and sanitary installations<\/b><span>Chemical laboratory and sanitary installations.<\/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\">Choose the VD if\u2026<\/h3><ul class=\"vf-si wp-block-list\"><li>You work with steam up to 200 \u00b0C, water, fuel oil, compressed air, or inert gases.<\/li><li>You need sizes from DN15 to DN100 or high flow rates, with Kv up to 115 m\u00b3\/h.<\/li><li>The inlet pressure reaches 40 barg.<\/li><li>You want to choose the body material: bronze, carbon steel, or stainless steel.<\/li><\/ul><h3 class=\"wp-block-heading\">Choose another model if\u2026<\/h3><ul class=\"vf-no wp-block-list\"><li>The steam exceeds 200 \u00b0C: see the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a> (up to 220 \u00b0C).<\/li><li>You need outlet pressures below 1.5 barg: the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/\">M2<\/a> regulates from 0.02 barg and the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv45\/\">PRV45<\/a> from 0.01 barg.<\/li><li>You need more than DN100: the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a> goes up to DN150.<\/li><li>You work with very small sizes: the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/\">PRV20<\/a> ranges from \u00bc\u2033 to \u00be\u2033 and also accepts 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\">VD technical specifications<\/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\">Type<\/th><td>Self-regulating, direct-acting, single-seat pressure reducing valve with a piston guided at 3 points<\/td><\/tr><tr><th scope=\"row\">Sizes<\/th><td>DN15, 20, 25, 32, 40, 50, 65, 80, and 100<\/td><\/tr><tr><th scope=\"row\">Connections<\/th><td>DIN PN16, PN25, and PN40 flanges \u00b7 ANSI Class 150 and 300 flanges \u00b7 BSP or NPT female thread up to 2\u2033<\/td><\/tr><tr><th scope=\"row\">Pressure rating<\/th><td>PN16 \u2013 PN25 \u2013 PN40 or Class 150 \u2013 Class 300<\/td><\/tr><tr><th scope=\"row\">Maximum inlet pressure<\/th><td>40 barg<\/td><\/tr><tr><th scope=\"row\">Maximum differential pressure (\u0394p)<\/th><td>25 bar (DN15 to DN50) \u00b7 20 bar (DN65 and DN80) \u00b7 16 bar (DN100)<\/td><\/tr><tr><th scope=\"row\">Outlet pressure range<\/th><td>1.5 to 16 barg (standard, 1.5 to 8 barg)<\/td><\/tr><tr><th scope=\"row\">Kv coefficient<\/th><td>From 3.5 m\u00b3\/h (DN15) to 115 m\u00b3\/h (DN100)<\/td><\/tr><tr><th scope=\"row\">Temperature<\/th><td>\u221220 to +200 \u00b0C (with AFLAS gaskets)<\/td><\/tr><tr><th scope=\"row\">Fluids<\/th><td>Steam (up to 200 \u00b0C), liquids, compressed air, and inert gases<\/td><\/tr><tr><th scope=\"row\">Body material<\/th><td>RG10 bronze, WCB carbon steel, or CF3M stainless steel<\/td><\/tr><tr><th scope=\"row\">Internals<\/th><td>316L stainless steel (1.4404); bronze optional<\/td><\/tr><tr><th scope=\"row\">Finish<\/th><td>High-hardness baked epoxy paint<\/td><\/tr><tr><th scope=\"row\">Mounting position<\/th><td>Recommended in a horizontal pipe; some positions are permitted and one is not recommended<\/td><\/tr><tr><th scope=\"row\">Pressure Equipment Directive<\/th><td>PED 2014\/68\/EU: depending on size and pressure, with or without CE marking (shown on the nameplate)<\/td><\/tr><tr><th scope=\"row\">ATEX<\/th><td>II 2 GD c IIC Tx \/ c IIIC Tx\u00baC \u00b7 certificate LOM 14.034 U<\/td><\/tr><\/tbody><\/table><\/figure><\/div><h3 class=\"wp-block-heading\">Dimensions, weight, and 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\">Length A, DIN flanges<\/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\">Length 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\">Length 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\">BSP \/ NPT thread<\/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\">Dimension 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\">Weight (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\">Dimensions in millimeters. The dimensioned drawings are in the PDF datasheet.<\/p><h3 class=\"wp-block-heading\">Possible faults and solutions<\/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\">Symptom<\/th><th scope=\"col\">Possible cause<\/th><th scope=\"col\">Recommended solution<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">Pressure exceeds the setting<\/th><td>Worn seat and plug<\/td><td>Replace the worn components<\/td><\/tr><tr><th scope=\"row\">Pressure drops below the setting<\/th><td>Valve installed backward; Kv too small; plug jammed<\/td><td>Check the arrow on the body and the sizing; replace the damaged parts<\/td><\/tr><tr><th scope=\"row\">Erratic control<\/th><td>Particles between the seat and the plug<\/td><td>Remove the particles and replace the damaged parts<\/td><\/tr><tr><th scope=\"row\">Fluctuating inlet pressure<\/th><td>Valve too large<\/td><td>Choose a lower Kv if necessary<\/td><\/tr><tr><th scope=\"row\">Loud noise<\/th><td>High flow velocity; cavitation<\/td><td>Check the sizing; for gases, install a flow diffuser<\/td><\/tr><\/tbody><\/table><\/figure><\/div><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Exploded view and materials (33 parts)<\/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\">No.<\/th><th scope=\"col\">Part<\/th><th scope=\"col\">Material<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">1<\/th><td>Body<\/td><td>RG10 bronze, WCB carbon steel, or stainless steel CF3M<\/td><\/tr><tr><th scope=\"row\">2<\/th><td>Seat<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">3<\/th><td>Stem (DN65 to DN100)<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">4<\/th><td>Washer<\/td><td>Stainless steel A2-70<\/td><\/tr><tr><th scope=\"row\">5<\/th><td>Screws<\/td><td>Stainless steel A2-70<\/td><\/tr><tr><th scope=\"row\">6<\/th><td>Piston<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">7<\/th><td>Plunger<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">8<\/th><td>Safety O-ring<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">9<\/th><td>Cap cover<\/td><td>Stainless steel CF3M<\/td><\/tr><tr><th scope=\"row\">10<\/th><td>Spring<\/td><td>Spring steel with epoxy paint (60\u2013100 microns)<\/td><\/tr><tr><th scope=\"row\">11<\/th><td>Adjusting nut<\/td><td>Galvanized steel 1.1191<\/td><\/tr><tr><th scope=\"row\">12<\/th><td>Plain bearing<\/td><td>PTFE + graphite<\/td><\/tr><tr><th scope=\"row\">13<\/th><td>Adjusting stem<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">14<\/th><td>Lock washer<\/td><td>Stainless steel A2-70<\/td><\/tr><tr><th scope=\"row\">15<\/th><td>O-ring<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">16<\/th><td>Piston stem<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">17<\/th><td>Nut<\/td><td>Stainless steel A2-70<\/td><\/tr><tr><th scope=\"row\">18<\/th><td>O-ring<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">19<\/th><td>Plunger guide<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">20<\/th><td>O-ring<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">21<\/th><td>Flat gasket<\/td><td>PTFE<\/td><\/tr><tr><th scope=\"row\">22<\/th><td>O-ring<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">26<\/th><td>Balancing plunger<\/td><td>NBR or PTFE + graphite + 302 stainless<\/td><\/tr><tr><th scope=\"row\">27<\/th><td>Lower bushing guide<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">28<\/th><td>Plug<\/td><td>NBR or graphite-filled PTFE<\/td><\/tr><tr><th scope=\"row\">29<\/th><td>Plug screw<\/td><td>Stainless steel A2-70<\/td><\/tr><tr><th scope=\"row\">30<\/th><td>Plug guide (DN65 to DN100)<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">31<\/th><td>Plug holder<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">41<\/th><td>Lower bushing stem (DN100)<\/td><td>Stainless steel AISI 316L<\/td><\/tr><tr><th scope=\"row\">42<\/th><td>O-ring (DN100)<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">43<\/th><td>Spring washer (DN100)<\/td><td>Stainless steel AISI 316L<\/td><\/tr><tr><th scope=\"row\">44<\/th><td>Screws (DN100)<\/td><td>Stainless steel A2-70<\/td><\/tr><tr><th scope=\"row\">51<\/th><td>Stem, replaces 3 and 30 (DN15 to 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>Recommended spare parts<\/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\">Reference<\/th><th scope=\"col\">Description<\/th><th scope=\"col\">Parts<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">VD.SP1<\/th><td>Gaskets and seats<\/td><td>7, 8, 18, 20, 21, 22, 26, and 28 (and 42 on DN100)<\/td><\/tr><tr><th scope=\"row\">VD.SP2<\/th><td>Spring<\/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\">How the VD works<\/h2><p class=\"wp-block-paragraph\">The VD works by a balance of forces on the regulating piston. It needs no air, electricity, or external pressure sensing points.<\/p><ol class=\"vf-steps wp-block-list\"><li><b>Closing by inlet pressure.<\/b> The upstream pressure reaches the valve and pushes the piston upward, which closes the passage.<\/li><li><b>Opening by the spring.<\/b> With the valve closed, turning the adjusting screw (13) clockwise compresses the spring (10), which acts on the bushing and the seat and opens the valve.<\/li><li><b>Regulation.<\/b> The valve opens the passage until the set downstream pressure is reached.<\/li><li><b>Compensation.<\/b> Inlet pressure variations are absorbed by compensating the upper section of the bushing, which is connected through the internal hole in the stem (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\">VD installation<\/h2><p class=\"wp-block-paragraph\">Valfonta recommends installing the VD with a bypass, as shown in this diagram, so that maintenance can be carried out without interrupting service. For more detail, see our guide on <a href=\"https:\/\/www.valfonta.com\/en\/blog\/how-to-install-pressure-reducing-valve\/\">how to install a pressure reducing valve<\/a>.<\/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=\"Recommended installation diagram of a pressure reducing valve, with 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>Isolation valves (1, 1a) and bypass valve (1b)<\/li><li>Strainer<\/li><li>Inlet pressure gauge<\/li><li>VD reducing valve<\/li><li>Safety valve<\/li><li>Outlet pressure gauge<\/li><\/ol><\/div><\/div><h3 class=\"wp-block-heading\">Installation and start-up<\/h3><ol class=\"vf-steps wp-block-list\"><li><b>Clean the pipe<\/b> before installing the valve, so that no impurities affect its operation.<\/li><li><b>Install a strainer<\/b> at the valve inlet to protect it.<\/li><li><b>Install the valve in a horizontal pipe<\/b> and follow the arrow on the body. There is one non-recommended position in which it might not work properly: check it in the manual.<\/li><li><b>Support the pipe, not the valve:<\/b> supports should be as close as possible to the reducing valve, but never attached to it or to the actuator.<\/li><li><b>Start up slowly:<\/b> open the shutoff valves gradually to avoid water hammer.<\/li><li><b>Adjust the outlet pressure<\/b> with the adjusting screw (13): turning it clockwise compresses the spring and raises the pressure; turning it counterclockwise lowers it.<\/li><\/ol><p class=\"wp-block-paragraph\">For maintenance, fully loosen the adjusting nut to release the spring tension, and make sure there is no pressure in the pipe or the valve and that it is at ambient temperature. The seat is removed with a special tool, whose drawing you can request from Valfonta. If there is noise or the pressure is not maintained, see the troubleshooting table and our articles on <a href=\"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-problems\/\">reducing valve problems<\/a> and <a href=\"https:\/\/www.valfonta.com\/en\/blog\/cavitation-in-valves\/\">cavitation in reducing valves<\/a>.<\/p><\/section><section id=\"documentacion\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">VD technical documentation<\/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>VD datasheet<\/b><span>PDF \u00b7 4 pages \u00b7 features, exploded view, dimensions, and installation diagram<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/wp-content\/uploads\/2026\/10\/VD-18A-ENG.pdf\" aria-label=\"PDF VD datasheet PDF \u00b7 4 pages \u00b7 features, exploded view, dimensions, and installation diagram\" 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>Operation and installation manual<\/b><span>PDF \u00b7 14 pages \u00b7 installation, ATEX, troubleshooting, disassembly, and receiving<\/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 Operation and installation manual PDF \u00b7 14 pages \u00b7 installation, ATEX, troubleshooting, disassembly, and receiving\" rel=\"noopener\" target=\"_blank\"><\/a><\/p><\/div><\/div><p class=\"wp-block-paragraph\">Do you need an order certificate or the ATEX documentation? See our <a href=\"https:\/\/www.valfonta.com\/en\/certificates\/\">quality certificates<\/a> or request it from our technical team.<\/p><\/section><section id=\"comparar\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">VD vs. other Valfonta reducing valves<\/h2><p class=\"wp-block-paragraph\">The VD is the largest-diameter piston reducing valve in the range. This table helps you check whether it is the right model or whether another one suits you better.<\/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\">Max. inlet (barg)<\/th><th scope=\"col\">Outlet (barg)<\/th><th scope=\"col\">Max. T (\u00b0C)<\/th><th scope=\"col\">Steam<\/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>Yes<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-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\/en\/product\/pressure-reducing-valve-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\/en\/product\/pressure-reducing-valve-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>Yes<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-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>Yes<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a><\/th><td>15 \u2013 150<\/td><td>40<\/td><td>40<\/td><td>0,1 \u2013 15<\/td><td>220<\/td><td>Yes<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/\">M2<\/a><\/th><td>15 \u2013 100<\/td><td>40<\/td><td>40<\/td><td>0,02 \u2013 10<\/td><td>180<\/td><td>Yes<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Temperature in parentheses: with EPDM or Viton gaskets. Data from the Valfonta general pressure reducing valve catalog (2025). If you are unsure whether to choose a piston or a diaphragm valve, read our <a href=\"https:\/\/www.valfonta.com\/en\/blog\/piston-vs-diaphragm\/\">comparison of piston and diaphragm reducing valves<\/a>.<\/p><\/section><section id=\"preguntas\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Frequently asked questions about the VD<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Can the VD be used with steam?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Yes. It is new to the range: the VD is now available for steam up to 200 \u00b0C, with AFLAS gaskets. Tell us the steam pressure and temperature and we will confirm the configuration.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What outlet pressure can be set?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">The outlet range is 1.5 to 16 barg; the standard range is 1.5 to 8 barg. The inlet pressure can reach 40 barg, with a maximum differential pressure of 25 bar up to DN50, 20 bar on DN65 and DN80, and 16 bar on DN100.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>How do you adjust the outlet pressure?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">With the adjusting screw (13). Turning it clockwise compresses the spring and raises the outlet pressure; turning it counterclockwise lowers it. We explain it in <a href=\"https:\/\/www.valfonta.com\/en\/blog\/how-it-regulate-a-pressure-reducing-valve\/\">how to adjust a pressure reducing valve<\/a>.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What maintenance does it need?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Very little. The gaskets, seat, stem, and plug undergo normal wear and are replaced when necessary; this can be done with the body installed, depressurized, and isolated. There are two spare part kits: gaskets and seats (VD.SP1) and spring (VD.SP2).<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Can it be installed in an ATEX zone?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Yes. The VD carries ATEX II 2 GD marking (certificate LOM 14.034 U) and can be used in zones 1 and 2 (flammable gases, vapors, and liquids) and 21 and 22 (combustible dust), within the temperature class corresponding to the fluid temperature.<\/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\">Other pressure reducing valve models<\/h2><ul class=\"vf-rel wp-block-list\"><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv30\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-prv30-frontal-400.webp\" alt=\"PRV30 reducing valve\" class=\"wp-image-199\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV30 reducing valve<\/b><span>316L stainless, from DN15 to DN25 and up to 25 bar.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV20-FOTO-700x700-1.jpg\" alt=\"PRV20 reducing valve\" class=\"wp-image-198\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV20 reducing valve<\/b><span>316L stainless, from \u00bc\u2033 to \u00be\u2033 and up to 40 bar inlet.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv44\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV30-44-700x700-1.jpg\" alt=\"PRV44 reducing valve\" class=\"wp-image-181\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV44 reducing valve<\/b><span>DN15\u201325, bellows-balanced, and for steam up to 210 \u00b0C.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv45\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV45-55-700x700-1.jpg\" alt=\"PRV45 reducing valve\" class=\"wp-image-191\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV45 reducing valve<\/b><span>Very low outlet pressures, from 0.01 barg; suitable for steam.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-m1-perspectiva-400.webp\" alt=\"M1 reducing valve\" class=\"wp-image-201\" width=\"300\" height=\"300\" loading=\"lazy\"><b>M1 reducing valve<\/b><span>Up to DN150 and 220 \u00b0C, for steam.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\" alt=\"M2 diaphragm reducing valve\" class=\"wp-image-193\" width=\"300\" height=\"300\" loading=\"lazy\"><b>M2 diaphragm reducing valve<\/b><span>DN15\u2013100, outlet pressures from 0.02 barg, and steam up to 180 \u00b0C.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/bellow-pressure-reducing-valve\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2F-700x700-1.jpg\" alt=\"M2 bellows reducing valve\" class=\"wp-image-202\" width=\"300\" height=\"300\" loading=\"lazy\"><b>M2 bellows reducing valve<\/b><span>Version with sealing bellows.<\/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\">Request a quote for the VD<\/h2><p class=\"wp-block-paragraph\">Give us your installation details and we will recommend the right size, body material, and gaskets.<\/p><ul class=\"wp-block-list\"><li>Fluid and operating temperature<\/li><li>Inlet pressure and desired outlet pressure<\/li><li>Maximum and minimum flow rate<\/li><li>Body material and connection (DIN or ANSI flanges, or threaded)<\/li><\/ul><p class=\"vf-pdp-contact wp-block-paragraph\">You can also call <a href=\"tel:+34933720888\">933 720 888<\/a>.<\/p><\/div>\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f564-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"564\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/en\/wp-json\/wp\/v2\/product\/665#wpcf7-f564-o1\" method=\"post\" class=\"wpcf7-form init vf-form wpcf7-acceptance-as-validation\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\" toolname=\"solicitar_oferta\" tooldescription=\"Request a quote from Valfonta for the models on this page (model, size, fluid and pressures); a member of the team will reply.\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"564\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.2.3\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f564-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=\"1792698936.b92fc575c81df5ff\" \/>\n<\/fieldset>\n<input class=\"wpcf7-form-control wpcf7-hidden\" value=\"VD\" type=\"hidden\" name=\"modelo\" \/><label>Name *<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>Company<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>Email *<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>Phone<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>Application data (optional)<\/legend><label>Size<span class=\"wpcf7-form-control-wrap\" data-name=\"dn\"><select class=\"wpcf7-form-control wpcf7-select\" aria-invalid=\"false\" name=\"dn\"><option value=\"\">Select<\/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=\"I don&#039;t know\">I don&#039;t know<\/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=\"water, air, fuel oil\u2026\" value=\"\" type=\"text\" name=\"fluido\" \/><\/span><\/label><label>Inlet pressure (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>Required outlet pressure (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>Flow rate<span class=\"wpcf7-form-control-wrap\" data-name=\"caudal\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"e.g. 2 m\u00b3\/h\" value=\"\" type=\"text\" name=\"caudal\" \/><\/span><\/label><label>Temperature (\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\">Message<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>I have read and accept the <a href=\"\/en\/privacy-policy\/\">privacy policy<\/a> *<\/span><\/label><input class=\"wpcf7-form-control wpcf7-submit has-spinner vf-btn vf-btn--pri\" type=\"submit\" value=\"Send request\" \/><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\">Call<\/a><a class=\"vf-btn vf-btn--pri\" href=\"#solicitar\">Request a quote<\/a><\/p><\/div><\/article><\/div>","protected":false},"excerpt":{"rendered":"<p>Home\u203aPressure reducing valves\u203aVD pressure reducing valve Pressure reducing valve \u00b7 3-point guided piston VD pressure reducing valve New: steam up to 200 \u00b0C Self-regulating, direct-acting, single-seat reducing valve with a regulating piston guided at 3 points. It keeps the outlet pressure constant on steam up to 200 \u00b0C, liquids, compressed air, and inert gases, from ... <a title=\"VD pressure reducing valve\" class=\"read-more\" href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/\" aria-label=\"Read more about VD pressure reducing valve\">Read more<\/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":"VD pressure reducing valve, DN15 to DN100 | Valfonta","rank_math_description":"Direct-acting VD pressure reducing valve with 3-point guided piston. DN15 to DN100, inlet up to 40 barg, outlet 1.5 to 16 barg, steam up to 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\/en\/\",\"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\":\"Design, manufacture, and sale of pressure reducing valves, pressure relief valves, and control valves.\"},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.valfonta.com\/#website\",\"url\":\"https:\/\/www.valfonta.com\/en\/\",\"name\":\"Valfonta\",\"publisher\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"en\"},{\"@type\":\"ItemPage\",\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/#webpage\",\"url\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/\",\"name\":\"VD pressure reducing valve, DN15 to DN100 | Valfonta\",\"description\":\"Direct-acting VD pressure reducing valve with 3-point guided piston. DN15 to DN100, inlet up to 40 barg, outlet 1.5 to 16 barg, steam up to 200 \u00b0C.\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"en\",\"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\/en\/product\/pressure-reducing-valve-vd\/#breadcrumb\"},\"mainEntity\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-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\":\"Pressure reducing valve\",\"inLanguage\":\"en\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.valfonta.com\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Pressure reducing valves\",\"item\":\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"VD pressure reducing valve\",\"item\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/\"}]},{\"@type\":\"Product\",\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/#product\",\"name\":\"VD pressure reducing valve\",\"url\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/\",\"description\":\"Self-regulating, direct-acting, single-seat reducing valve with a regulating piston guided at 3 points. It keeps the outlet pressure constant on steam up to 200 \u00b0C, liquids, compressed air, and inert gases, from DN15 to DN100 and with up to 40 barg inlet pressure. New: the VD is now available for steam up to 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\":\"RG10 bronze, WCB carbon steel, or CF3M stainless steel\",\"additionalProperty\":[{\"@type\":\"PropertyValue\",\"name\":\"Type\",\"value\":\"Self-regulating, direct-acting, single-seat pressure reducing valve with a piston guided at 3 points\"},{\"@type\":\"PropertyValue\",\"name\":\"Sizes\",\"value\":\"DN15, 20, 25, 32, 40, 50, 65, 80, and 100\"},{\"@type\":\"PropertyValue\",\"name\":\"Connections\",\"value\":\"DIN PN16, PN25, and PN40 flanges \u00b7 ANSI Class 150 and 300 flanges \u00b7 BSP or NPT female thread up to 2\u2033\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressure rating\",\"value\":\"PN16 \u2013 PN25 \u2013 PN40 or Class 150 \u2013 Class 300\"},{\"@type\":\"PropertyValue\",\"name\":\"Maximum inlet pressure\",\"value\":\"40 barg\"},{\"@type\":\"PropertyValue\",\"name\":\"Maximum differential pressure (\u0394p)\",\"value\":\"25 bar (DN15 to DN50) \u00b7 20 bar (DN65 and DN80) \u00b7 16 bar (DN100)\"},{\"@type\":\"PropertyValue\",\"name\":\"Outlet pressure range\",\"value\":\"1.5 to 16 barg (standard, 1.5 to 8 barg)\"},{\"@type\":\"PropertyValue\",\"name\":\"Kv coefficient\",\"value\":\"From 3.5 m\u00b3\/h (DN15) to 115 m\u00b3\/h (DN100)\"},{\"@type\":\"PropertyValue\",\"name\":\"Temperature\",\"value\":\"\u221220 to +200 \u00b0C (with AFLAS gaskets)\"},{\"@type\":\"PropertyValue\",\"name\":\"Fluids\",\"value\":\"Steam (up to 200 \u00b0C), liquids, compressed air, and inert gases\"},{\"@type\":\"PropertyValue\",\"name\":\"Body material\",\"value\":\"RG10 bronze, WCB carbon steel, or CF3M stainless steel\"},{\"@type\":\"PropertyValue\",\"name\":\"Internals\",\"value\":\"316L stainless steel (1.4404); bronze optional\"},{\"@type\":\"PropertyValue\",\"name\":\"Finish\",\"value\":\"High-hardness baked epoxy paint\"},{\"@type\":\"PropertyValue\",\"name\":\"Mounting position\",\"value\":\"Recommended in a horizontal pipe; some positions are permitted and one is not recommended\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressure Equipment Directive\",\"value\":\"PED 2014\/68\/EU: depending on size and pressure, with or without CE marking (shown on the nameplate)\"},{\"@type\":\"PropertyValue\",\"name\":\"ATEX\",\"value\":\"II 2 GD c IIC Tx \/ c IIIC Tx\u00baC \u00b7 certificate LOM 14.034 U\"}],\"category\":\"Pressure reducing valves\",\"subjectOf\":[{\"@type\":\"DigitalDocument\",\"name\":\"VD datasheet\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/VD-18A-ENG.pdf\",\"encodingFormat\":\"application\/pdf\"},{\"@type\":\"DigitalDocument\",\"name\":\"Operation and installation manual\",\"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\/en\/product\/pressure-reducing-valve-vd\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Can the VD be used with steam?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. It is new to the range: the VD is now available for steam up to 200 \u00b0C, with AFLAS gaskets. Tell us the steam pressure and temperature and we will confirm the configuration.\"}},{\"@type\":\"Question\",\"name\":\"What outlet pressure can be set?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The outlet range is 1.5 to 16 barg; the standard range is 1.5 to 8 barg. The inlet pressure can reach 40 barg, with a maximum differential pressure of 25 bar up to DN50, 20 bar on DN65 and DN80, and 16 bar on DN100.\"}},{\"@type\":\"Question\",\"name\":\"How do you adjust the outlet pressure?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"With the adjusting screw (13). Turning it clockwise compresses the spring and raises the outlet pressure; turning it counterclockwise lowers it. We explain it in how to adjust a pressure reducing valve.\"}},{\"@type\":\"Question\",\"name\":\"What maintenance does it need?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Very little. The gaskets, seat, stem, and plug undergo normal wear and are replaced when necessary; this can be done with the body installed, depressurized, and isolated. There are two spare part kits: gaskets and seats (VD.SP1) and spring (VD.SP2).\"}},{\"@type\":\"Question\",\"name\":\"Can it be installed in an ATEX zone?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The VD carries ATEX II 2 GD marking (certificate LOM 14.034 U) and can be used in zones 1 and 2 (flammable gases, vapors, and liquids) and 21 and 22 (combustible dust), within the temperature class corresponding to the fluid temperature.\"}}]}]}]"},"product_brand":[],"product_cat":[79],"product_tag":[],"class_list":["post-665","product","type-product","status-publish","product_cat-sin-categorizar","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product\/665","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media?parent=665"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product_brand?post=665"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product_cat?post=665"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product_tag?post=665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}