{"id":660,"date":"2026-10-02T13:17:48","date_gmt":"2026-10-02T11:17:48","guid":{"rendered":"https:\/\/www.valfonta.com\/producto\/pressure-reducing-valve-prv20\/"},"modified":"2026-10-22T09:22:24","modified_gmt":"2026-10-22T07:22:24","slug":"pressure-reducing-valve-prv20","status":"publish","type":"product","link":"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/","title":{"rendered":"PRV20 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\">PRV20 pressure reducing valve<\/span><\/p><\/nav><article class=\"wp-block-group vf-pdp vfd-model--PRV20 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 Direct-acting<\/p><h1 class=\"wp-block-heading\">PRV20 pressure reducing valve<\/h1><\/div><div class=\"wp-block-group vf-pdp-media is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><span class=\"vf-pdp-badge\">316L stainless<\/span><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV20-FOTO-700x700-1.jpg\" alt=\"PRV20 pressure reducing valve in 316L stainless steel with threaded connection\" class=\"wp-image-198\" width=\"700\" height=\"700\" fetchpriority=\"high\"><\/p><\/div><div class=\"wp-block-group vf-pdp-body is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-lead wp-block-paragraph\">Self-regulating, piston-balanced reducing valve with AISI 316L stainless steel body and internals and threaded connection from \u00bc\u2033 to \u00be\u2033. It keeps the outlet pressure constant even when the inlet pressure fluctuates, with up to 40 barg upstream.<\/p><ul class=\"vf-pdp-keys wp-block-list\"><li><span>Sizes<\/span><b>\u00bc\u2033 to \u00be\u2033 <small>DN8 to DN20<\/small><\/b><\/li><li><span>Pressure rating<\/span><b>PN40<\/b><\/li><li><span>Inlet pressure<\/span><b>up to 40 barg<\/b><\/li><li><span>Outlet pressure<\/span><b>0.2 to 20 barg<\/b><\/li><li><span>Temperature<\/span><b>\u221220 to 150 \u00b0C <small>with Viton gaskets<\/small><\/b><\/li><li><span>Kv<\/span><b>1.2 to 2.4 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\/PRV20-16-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>Installation in any position<\/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 PRV20 is used for<\/h2><p class=\"wp-block-paragraph\">The <strong>PRV20<\/strong> is the smallest <a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">pressure reducing valve<\/a> in the Valfonta range: it covers \u00bc\u2033 to \u00be\u2033 with BSP or NPT threaded ends. It is direct-acting, with no auxiliary power: an adjusting spring and the outlet pressure itself balance the piston, and the valve closes when the downstream pressure rises above the set value.<\/p><p class=\"wp-block-paragraph\">It accepts up to <strong>40 barg inlet pressure<\/strong> and offers three outlet ranges, from 0.2 to 20 barg, which makes it useful on small-diameter lines with high inlet pressures. The body and internals are AISI 316L stainless steel, and it requires no periodic maintenance. If you are looking for a <a href=\"https:\/\/www.valfonta.com\/en\/blog\/stainless-steel-pressure-reducing-valve\/\">stainless steel reducing valve<\/a>, also compare the PRV30 and the PRV44.<\/p><ul class=\"vf-pdp-apps wp-block-list\"><li><b>Chemical laboratories<\/b><span>Supplying laboratory equipment and installations with stable pressure.<\/span><\/li><li><b>Sanitary plants<\/b><span>Water and fluid lines where 316L stainless steel is required.<\/span><\/li><li><b>Compressed air<\/b><span>Reducing the network pressure to the value each point of use requires.<\/span><\/li><li><b>Sprinkler systems<\/b><span>Pressure stabilization in sprinkler installations.<\/span><\/li><li><b>Group 2 liquids and gases<\/b><span>Water, oil, and non-flammable gases such as nitrogen.<\/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 PRV20 if\u2026<\/h3><ul class=\"vf-si wp-block-list\"><li>You work with water, oil, compressed air, or non-flammable gases (Group 2).<\/li><li>You need small sizes, from \u00bc\u2033 to \u00be\u2033, with a threaded connection.<\/li><li>The inlet pressure reaches 40 barg or you need outlet pressures up to 20 barg.<\/li><li>You need mounting flexibility: the PRV20 can be installed in any position.<\/li><\/ul><h3 class=\"wp-block-heading\">Choose another model if\u2026<\/h3><ul class=\"vf-no wp-block-list\"><li>You regulate steam: see the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv44\/\">PRV44<\/a> (up to 210 \u00b0C), the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv45\/\">PRV45<\/a> (up to 150 \u00b0C), or the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a> (up to 220 \u00b0C) and, for larger sizes, the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/\">VD<\/a> (up to 200 \u00b0C).<\/li><li>You need EN or ANSI flanges: the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv30\/\">PRV30<\/a> and the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/\">VD<\/a> offer them as standard.<\/li><li>You need more than \u00be\u2033 or a higher flow rate: the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv30\/\">PRV30<\/a> goes up to DN25 and the VD up to DN100 with a Kv of up to 115 m\u00b3\/h.<\/li><li>You require outlet pressures below 0.2 barg: see the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv45\/\">PRV45<\/a> (from 0.01 barg) or the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/\">M2<\/a> (from 0.02 barg).<\/li><\/ul><\/aside><\/div><\/section><section id=\"especificaciones\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">PRV20 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, piston-balanced pressure reducing valve<\/td><\/tr><tr><th scope=\"row\">Sizes<\/th><td>\u00bc\u2033, \u215c\u2033, \u00bd\u2033, and \u00be\u2033 (DN8 to DN20)<\/td><\/tr><tr><th scope=\"row\">Connections<\/th><td>BSP or NPT thread (others on request)<\/td><\/tr><tr><th scope=\"row\">Pressure rating<\/th><td>PN40<\/td><\/tr><tr><th scope=\"row\">Maximum inlet pressure<\/th><td>40 barg<\/td><\/tr><tr><th scope=\"row\">Outlet pressure ranges<\/th><td>0.2 \u2013 2 barg \u00b7 1 \u2013 8 barg \u00b7 5 \u2013 20 barg (depending on spring)<\/td><\/tr><tr><th scope=\"row\">Kv coefficient<\/th><td>1.2 m\u00b3\/h (\u00bc\u2033) \u00b7 1.8 m\u00b3\/h (\u215c\u2033) \u00b7 2.1 m\u00b3\/h (\u00bd\u2033) \u00b7 2.4 m\u00b3\/h (\u00be\u2033). Special Kv on request<\/td><\/tr><tr><th scope=\"row\">Temperature<\/th><td>\u221220 to +150 \u00b0C (with Viton gaskets)<\/td><\/tr><tr><th scope=\"row\">Fluids<\/th><td>Group 2 liquids and gases: water, oil, compressed air, and non-flammable gases<\/td><\/tr><tr><th scope=\"row\">Materials<\/th><td>Body and internals in AISI 316L (1.4404) stainless steel<\/td><\/tr><tr><th scope=\"row\">Gaskets<\/th><td>NBR, FKM, or EPDM (special materials on request)<\/td><\/tr><tr><th scope=\"row\">Mounting position<\/th><td>Any position<\/td><\/tr><tr><th scope=\"row\">Pressure Equipment Directive<\/th><td>PED 2014\/68\/EU: CE marking not required<\/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><tr><th scope=\"row\">On request<\/th><td>Duplex or super duplex body \u00b7 weld ends \u00b7 other connections \u00b7 special Kv \u00b7 special gaskets<\/td><\/tr><\/tbody><\/table><\/figure><\/div><h3 class=\"wp-block-heading\">Dimensions and weight<\/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\">\u00bc\u2033<\/th><th scope=\"col\">\u215c\u2033<\/th><th scope=\"col\">\u00bd\u2033<\/th><th scope=\"col\">\u00be\u2033<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">Kv (m\u00b3\/h)<\/th><td>1,2<\/td><td>1,8<\/td><td>2,1<\/td><td>2,4<\/td><\/tr><tr><th scope=\"row\">Length A<\/th><td>80<\/td><td>80<\/td><td>80<\/td><td>80<\/td><\/tr><tr><th scope=\"row\">Height H1<\/th><td>110<\/td><td>110<\/td><td>110<\/td><td>110<\/td><\/tr><tr><th scope=\"row\">Height H2<\/th><td>150 \u2013 180<\/td><td>150 \u2013 180<\/td><td>150 \u2013 180<\/td><td>150 \u2013 180<\/td><\/tr><tr><th scope=\"row\">Weight (kg)<\/th><td>3,5<\/td><td>3,5<\/td><td>3,5<\/td><td>3,5<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Dimensions in millimeters. The dimensioned drawing is in the PDF datasheet.<\/p><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Exploded view and materials (19 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>Bottom cover<\/td><td>Stainless steel 1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">2<\/th><td>O-ring<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">3<\/th><td>Seat<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">4<\/th><td>O-ring<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">5<\/th><td>Body<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">6<\/th><td>O-ring<\/td><td>NBR<\/td><\/tr><tr><th scope=\"row\">7<\/th><td>Piston<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">8<\/th><td>Washer<\/td><td>Stainless steel A2-70<\/td><\/tr><tr><th scope=\"row\">9<\/th><td>Spring washer<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">10<\/th><td>Adjusting screw<\/td><td>Stainless steel A2-70<\/td><\/tr><tr><th scope=\"row\">11<\/th><td>Nut<\/td><td>Stainless steel A2-70<\/td><\/tr><tr><th scope=\"row\">12<\/th><td>Spring cover<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">13<\/th><td>Adjusting spring<\/td><td>Spring steel 52SiCrNi5<\/td><\/tr><tr><th scope=\"row\">14<\/th><td>Nut<\/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>Stem<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">17<\/th><td>Seat guide<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">18<\/th><td>Washer<\/td><td>Stainless steel A2-70<\/td><\/tr><tr><th scope=\"row\">19<\/th><td>Nut<\/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\">PRV20.SP1<\/th><td>Gasket kit<\/td><td>2, 3, 4, 6, and 15<\/td><\/tr><tr><th scope=\"row\">PRV20.SP2<\/th><td>Spring<\/td><td>13<\/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 PRV20 works<\/h2><p class=\"wp-block-paragraph\">The PRV20 regulates by a balance of forces between the adjusting spring and the outlet pressure acting on the 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 fluid enters the valve and, due to the difference in areas, the inlet pressure tends to close it.<\/li><li><b>Opening with the spring.<\/b> When the spring (13) is compressed with the adjusting screw (10), the closing assembly (stem, seat, and guide) moves away and lets the fluid through.<\/li><li><b>Regulation.<\/b> The outlet pressure opposes the spring. When it exceeds the set pressure, the valve closes; when it drops, the valve opens again.<\/li><li><b>Zero flow.<\/b> If the downstream valves are closed, the PRV20 absorbs the fluctuations and holds the outlet pressure at the setting.<\/li><\/ol><p class=\"wp-block-paragraph\">Remember that a reducing valve is not a safety valve: if the installation requires it, an overpressure protection device must be installed downstream.<\/p><\/section><section id=\"instalacion\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">PRV20 installation<\/h2><p class=\"wp-block-paragraph\">This is the recommended installation layout for a reducing valve, with a bypass so that maintenance can be carried out without interrupting service. You can find more information in 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><path d=\"M470 156 V198\" stroke=\"#1e2123\" stroke-dasharray=\"4 4\" stroke-width=\"2\"><\/path><path d=\"M620 150 V198\" stroke=\"#1e2123\" stroke-dasharray=\"4 4\" stroke-width=\"2\"><\/path><path d=\"M474 190 H616\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><path d=\"M474 190 l8 -5 v10 z M616 190 l-8 -5 v10 z\" fill=\"#1e2123\"><\/path><text fill=\"#1e2123\" font-family=\"Montserrat,Arial\" font-size=\"13\" text-anchor=\"middle\" x=\"545\" y=\"214\">0.5 \u2013 1 m<\/text><g><rect fill=\"#fff\" height=\"34\" rx=\"4\" stroke=\"#1e2123\" stroke-width=\"2\" width=\"26\" x=\"610\" y=\"68\"><\/rect><circle cx=\"623\" cy=\"124\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"623\" y=\"128\">5<\/text><\/g><path d=\"M623 102 V117\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><g><line stroke=\"#1e2123\" stroke-width=\"2\" x1=\"690\" x2=\"690\" y1=\"116\" y2=\"90\"><\/line><circle cx=\"690\" cy=\"77\" fill=\"#fff\" r=\"13\" stroke=\"#1e2123\" stroke-width=\"2\"><\/circle><line stroke=\"#e6305d\" stroke-width=\"2\" x1=\"690\" x2=\"697\" y1=\"77\" y2=\"70\"><\/line><circle cx=\"714\" cy=\"64\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"714\" y=\"68\">6<\/text><\/g><g><path d=\"M800 120 l-14 -10 v20 z M800 120 l14 -10 v20 z\" fill=\"#fff\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><line stroke=\"#1e2123\" stroke-width=\"2\" x1=\"800\" x2=\"800\" y1=\"120\" y2=\"102\"><\/line><rect fill=\"#1e2123\" height=\"4\" width=\"16\" x=\"792\" y=\"98\"><\/rect><circle cx=\"800\" cy=\"152\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"800\" y=\"156\">1a<\/text><\/g><\/svg><\/p><\/div><div class=\"wp-block-group vf-t-figcaption is-layout-flow wp-block-group-is-layout-flow\"><ol class=\"wp-block-list\"><li>Shutoff valves (1, 1a) and bypass valve (1b)<\/li><li>Strainer<\/li><li>Inlet pressure gauge<\/li><li>PRV20 reducing valve<\/li><li>Safety valve, 0.5\u20131 m from the reducing 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: any impurity can impair the operation of the reducing valve.<\/li><li><b>Install a strainer<\/b> upstream of the valve to protect the seat.<\/li><li><b>Choose the position<\/b> that suits you best: the PRV20 can be installed in any position.<\/li><li><b>Support the pipe, not the valve:<\/b> the supports should be as close as possible to the reducing valve, but never attached to it or to its cover.<\/li><li><b>Leave 0.5 to 1 m<\/b> of pipe up to the safety valve for better compensation.<\/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: turning clockwise compresses the spring and raises the pressure; turning counterclockwise lowers it.<\/li><\/ol><p class=\"wp-block-paragraph\">The valve must be installed by qualified personnel, never exceeding the operating pressure and temperature for which it was sized. In ATEX zones, the valve must be equipotentially bonded and grounded to the installation. If the outlet pressure is not stable, review the <a href=\"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-problems\/\">most common reducing valve problems<\/a>.<\/p><\/section><section id=\"documentacion\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">PRV20 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>PRV20 datasheet<\/b><span>PDF \u00b7 2 pages \u00b7 features, exploded view, and operation<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/wp-content\/uploads\/2026\/10\/PRV20-16-ENG.pdf\" aria-label=\"PDF PRV20 datasheet PDF \u00b7 2 pages \u00b7 features, exploded view, and operation\" 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 9 pages \u00b7 features, ATEX, exploded view, installation, and maintenance<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/wp-content\/uploads\/2026\/10\/Manual-PRV20-16C-ESP.pdf\" aria-label=\"PDF Operation and installation manual PDF \u00b7 9 pages \u00b7 features, ATEX, exploded view, installation, and maintenance\" 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\">PRV20 vs. other Valfonta reducing valves<\/h2><p class=\"wp-block-paragraph\">The PRV20 is the smallest model in the range and accepts up to 40 barg inlet pressure. 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>PRV20<\/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-valve-vd\/\">VD<\/a><\/th><td>15 \u2013 100<\/td><td>40<\/td><td>40<\/td><td>1,5 \u2013 16<\/td><td>200<\/td><td>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 PRV20<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Can the PRV20 be used with steam?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">No. The PRV20 is designed for Group 2 liquids and gases: water, oil, compressed air, and non-flammable gases. For steam, Valfonta manufactures the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv44\/\">PRV44<\/a> (up to 210 \u00b0C), the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv45\/\">PRV45<\/a> (up to 150 \u00b0C), and the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a> (up to 220 \u00b0C).<\/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\">It depends on the adjusting spring. There are three ranges: 0.2 to 2 barg, 1 to 8 barg, and 5 to 20 barg. The inlet pressure can reach 40 barg.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>How is the outlet pressure of the PRV20 adjusted?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">With the adjusting screw. Turning it clockwise compresses the spring and raises the outlet pressure; turning it counterclockwise releases the spring and lowers it. We explain it step by step 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>How does it differ from the PRV30?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Both are 316L stainless steel piston reducing valves for liquids and gases. The PRV20 covers smaller sizes (\u00bc\u2033 to \u00be\u2033), threaded only, and accepts up to 40 barg inlet pressure and outlet pressures up to 20 barg. The <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv30\/\">PRV30<\/a> goes from DN15 to DN25, also flanged, with up to 25 barg inlet pressure.<\/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\">It requires no periodic maintenance. Inspect the gaskets and wear parts according to the service conditions; this can be done with the valve installed, depressurized, and isolated. There are two spare parts: the gasket kit (PRV20.SP1) and the spring (PRV20.SP2).<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Does the PRV20 carry CE marking?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">It does not need it. Because of its size (DN8 to DN20), its pressure rating (PN40), and the fluid type (Group 2), the Pressure Equipment Directive 2014\/68\/EU does not require CE marking.<\/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 PRV20 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 that corresponds to the fluid temperature. More information in our article on <a href=\"https:\/\/www.valfonta.com\/en\/blog\/atex-valves\/\">ATEX valves<\/a>.<\/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, threaded or flanged, up to 25 bar.<\/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>Bellows-balanced, suitable 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-valve-vd\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-vd-perspectiva-400.webp\" alt=\"VD reducing valve\" class=\"wp-image-10116\" width=\"300\" height=\"300\" loading=\"lazy\"><b>VD reducing valve<\/b><span>From DN15 to DN100, up to 40 bar, and steam up to 200 \u00b0C.<\/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 PRV20<\/h2><p class=\"wp-block-paragraph\">Give us your installation details and we will recommend the right size, spring range, 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>Size and thread type (BSP or NPT)<\/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-f560-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"560\">\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\/660#wpcf7-f560-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=\"560\" \/><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-f560-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=\"1792698932.cd3dd347c8099e84\" \/>\n<\/fieldset>\n<input class=\"wpcf7-form-control wpcf7-hidden\" value=\"PRV20\" 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=\"\u00bc\u2033\">\u00bc\u2033<\/option><option value=\"\u215c\u2033\">\u215c\u2033<\/option><option value=\"\u00bd\u2033\">\u00bd\u2033<\/option><option value=\"\u00be\u2033\">\u00be\u2033<\/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, nitrogen\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\u203aPRV20 pressure reducing valve Pressure reducing valve \u00b7 Direct-acting PRV20 pressure reducing valve 316L stainless Self-regulating, piston-balanced reducing valve with AISI 316L stainless steel body and internals and threaded connection from \u00bc\u2033 to \u00be\u2033. It keeps the outlet pressure constant even when the inlet pressure fluctuates, with up to 40 barg upstream. Request ... <a title=\"PRV20 pressure reducing valve\" class=\"read-more\" href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/\" aria-label=\"Read more about PRV20 pressure reducing valve\">Read more<\/a><\/p>\n","protected":false},"featured_media":198,"template":"","meta":{"_acf_changed":false,"_generate-full-width-content":"true","_generate-disable-headline":"true","rank_math_title":"PRV20 pressure reducing valve, 316L stainless | Valfonta","rank_math_description":"Direct-acting, piston-balanced PRV20 pressure reducing valve in 316L stainless. \u00bc\u2033 to \u00be\u2033 threaded, inlet up to 40 barg, outlet from 0.2 to 20 barg.","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-prv20\/#webpage\",\"url\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/\",\"name\":\"PRV20 pressure reducing valve, 316L stainless | Valfonta\",\"description\":\"Direct-acting, piston-balanced PRV20 pressure reducing valve in 316L stainless. \u00bc\u2033 to \u00be\u2033 threaded, inlet up to 40 barg, outlet from 0.2 to 20 barg.\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"en\",\"datePublished\":\"2020-02-05T10:09:35+02:00\",\"dateModified\":\"2026-04-30T16:31:04+02:00\",\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV20-FOTO-700x700-1.jpg\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/#breadcrumb\"},\"mainEntity\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/#product\"}},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV20-FOTO-700x700-1.jpg\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV20-FOTO-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-prv20\/#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\":\"PRV20 pressure reducing valve\",\"item\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/\"}]},{\"@type\":\"Product\",\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/#product\",\"name\":\"PRV20 pressure reducing valve\",\"url\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/\",\"description\":\"Self-regulating, piston-balanced reducing valve with AISI 316L stainless steel body and internals and threaded connection from \u00bc\u2033 to \u00be\u2033. 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Special Kv on request\"},{\"@type\":\"PropertyValue\",\"name\":\"Temperature\",\"value\":\"\u221220 to +150 \u00b0C (with Viton gaskets)\"},{\"@type\":\"PropertyValue\",\"name\":\"Fluids\",\"value\":\"Group 2 liquids and gases: water, oil, compressed air, and non-flammable gases\"},{\"@type\":\"PropertyValue\",\"name\":\"Materials\",\"value\":\"Body and internals in AISI 316L (1.4404) stainless steel\"},{\"@type\":\"PropertyValue\",\"name\":\"Gaskets\",\"value\":\"NBR, FKM, or EPDM (special materials on request)\"},{\"@type\":\"PropertyValue\",\"name\":\"Mounting position\",\"value\":\"Any position\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressure Equipment Directive\",\"value\":\"PED 2014\/68\/EU: CE marking not required\"},{\"@type\":\"PropertyValue\",\"name\":\"ATEX\",\"value\":\"II 2 GD c IIC Tx \/ c IIIC Tx\u00baC \u00b7 certificate LOM 14.034 U\"},{\"@type\":\"PropertyValue\",\"name\":\"On request\",\"value\":\"Duplex or super duplex body \u00b7 weld ends \u00b7 other connections \u00b7 special Kv \u00b7 special gaskets\"}],\"category\":\"Pressure reducing valves\",\"subjectOf\":[{\"@type\":\"DigitalDocument\",\"name\":\"PRV20 datasheet (in English)\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/PRV20-16-ENG.pdf\",\"encodingFormat\":\"application\/pdf\"},{\"@type\":\"DigitalDocument\",\"name\":\"Operation and installation manual\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Manual-PRV20-16C-ESP.pdf\",\"encodingFormat\":\"application\/pdf\"}]},{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Can the PRV20 be used with steam?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The PRV20 is designed for Group 2 liquids and gases: water, oil, compressed air, and non-flammable gases. For steam, Valfonta manufactures the PRV44 (up to 210 \u00b0C), the PRV45 (up to 150 \u00b0C), and the M1 (up to 220 \u00b0C).\"}},{\"@type\":\"Question\",\"name\":\"What outlet pressure can be set?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It depends on the adjusting spring. There are three ranges: 0.2 to 2 barg, 1 to 8 barg, and 5 to 20 barg. The inlet pressure can reach 40 barg.\"}},{\"@type\":\"Question\",\"name\":\"How is the outlet pressure of the PRV20 adjusted?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"With the adjusting screw. Turning it clockwise compresses the spring and raises the outlet pressure; turning it counterclockwise releases the spring and lowers it. We explain it step by step in how to adjust a pressure reducing valve.\"}},{\"@type\":\"Question\",\"name\":\"How does it differ from the PRV30?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Both are 316L stainless steel piston reducing valves for liquids and gases. The PRV20 covers smaller sizes (\u00bc\u2033 to \u00be\u2033), threaded only, and accepts up to 40 barg inlet pressure and outlet pressures up to 20 barg. The PRV30 goes from DN15 to DN25, also flanged, with up to 25 barg inlet pressure.\"}},{\"@type\":\"Question\",\"name\":\"What maintenance does it need?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It requires no periodic maintenance. Inspect the gaskets and wear parts according to the service conditions; this can be done with the valve installed, depressurized, and isolated. There are two spare parts: the gasket kit (PRV20.SP1) and the spring (PRV20.SP2).\"}},{\"@type\":\"Question\",\"name\":\"Does the PRV20 carry CE marking?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It does not need it. Because of its size (DN8 to DN20), its pressure rating (PN40), and the fluid type (Group 2), the Pressure Equipment Directive 2014\/68\/EU does not require CE marking.\"}},{\"@type\":\"Question\",\"name\":\"Can it be installed in an ATEX zone?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The PRV20 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 that corresponds to the fluid temperature. More information in our article on ATEX valves.\"}}]}]}]"},"product_brand":[],"product_cat":[79],"product_tag":[],"class_list":["post-660","product","type-product","status-publish","has-post-thumbnail","product_cat-sin-categorizar","first","instock","shipping-taxable","purchasable","product-type-variable"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product\/660","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:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media\/198"}],"wp:attachment":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media?parent=660"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product_brand?post=660"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product_cat?post=660"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product_tag?post=660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}