{"id":661,"date":"2026-10-02T13:17:50","date_gmt":"2026-10-02T11:17:50","guid":{"rendered":"https:\/\/www.valfonta.com\/producto\/valvula-reductora-de-presion-prv44-2\/"},"modified":"2026-10-22T10:07:52","modified_gmt":"2026-10-22T08:07:52","slug":"pressure-reducing-valve-prv44","status":"publish","type":"product","link":"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv44\/","title":{"rendered":"PRV44 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\">PRV44 pressure reducing valve<\/span><\/p><\/nav><article class=\"wp-block-group vf-pdp vfd-model--PRV44 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 Bellows-balanced<\/p><h1 class=\"wp-block-heading\">PRV44 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\">For steam<\/span><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV30-44-700x700-1.jpg\" alt=\"PRV44 bellows pressure reducing valve in 316L stainless steel, for steam\" class=\"wp-image-181\" 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, direct-acting reducing valve, balanced by a stainless steel bellows and made of AISI 316L. It keeps the outlet pressure constant even when the inlet pressure fluctuates, in steam, water, compressed air, and gases, from \u221230 to 210 \u00b0C.<\/p><ul class=\"vf-pdp-keys wp-block-list\"><li><span>Sizes<\/span><b>DN15 to DN25<\/b><\/li><li><span>Pressure rating<\/span><b>PN25<\/b><\/li><li><span>Inlet pressure<\/span><b>up to 25 barg<\/b><\/li><li><span>Outlet pressure<\/span><b>0.5 to 12 barg<\/b><\/li><li><span>Temperature<\/span><b>\u221230 to 210 \u00b0C<\/b><\/li><li><span>Kv<\/span><b>2 to 3.5 m\u00b3\/h<\/b><\/li><\/ul><div class=\"wp-block-group vf-pdp-cta is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--pri\" href=\"#solicitar\">Request a quote<\/a><a class=\"vf-btn vf-btn--sec\" href=\"\/wp-content\/uploads\/2026\/10\/PRV44-16-ESP.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>Microplasma-welded stainless steel bellows<\/li><li>Genuine spare parts available, bellows included<\/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 PRV44 is used for<\/h2><p class=\"wp-block-paragraph\">The <strong>PRV44<\/strong> is a direct-acting <a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">pressure reducing valve<\/a>: it needs no auxiliary power or pilot line. The adjusting spring opens the valve and the outlet pressure closes it; a <strong>microplasma-welded stainless steel bellows<\/strong> balances the closing assembly. With its graphite-filled PTFE seat, it handles temperatures up to 210 \u00b0C and is suitable for <a href=\"https:\/\/www.valfonta.com\/en\/blog\/steam-pressure-reducing-valve-2\/\">reducing steam pressure<\/a> in small sizes.<\/p><p class=\"wp-block-paragraph\">It shares sizes, connections, Kv, and dimensions with the PRV30, so it can replace it when the line carries steam. Its internal design allows efficient fluid flow, and it requires very little maintenance.<\/p><ul class=\"vf-pdp-apps wp-block-list\"><li><b>Steam installations<\/b><span>Steam networks and heat exchangers.<\/span><\/li><li><b>Distilleries<\/b><span>Steam supply at regulated pressure.<\/span><\/li><li><b>Vulcanizing<\/b><span>Vulcanizing cylinders and presses.<\/span><\/li><li><b>Dry cleaners and laundries<\/b><span>Steam pressing and laundry equipment.<\/span><\/li><li><b>Ovens and autoclaves<\/b><span>Stabilizing the supply pressure.<\/span><\/li><li><b>Laboratories and industry<\/b><span>Chemical laboratories, sanitary installations, compressed air, and fuel oil.<\/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 PRV44 if\u2026<\/h3><ul class=\"vf-si wp-block-list\"><li>You regulate steam or hot fluids, up to 210 \u00b0C.<\/li><li>You need small sizes, from DN15 to DN25, and up to 25 bar inlet pressure.<\/li><li>The body, the cap, and the internals must be made of 316L stainless steel.<\/li><li>You are looking for a simple valve, with no pilot and very little maintenance.<\/li><\/ul><h3 class=\"wp-block-heading\">Choose another model if\u2026<\/h3><ul class=\"vf-no wp-block-list\"><li>You need outlet pressures below 0.5 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><li>You need more than DN25: the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a> goes up to DN150 and the M2 up to DN100, both suitable for steam.<\/li><li>The inlet pressure exceeds 25 bar: the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a> and the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/\">M2<\/a> accept up to 40 bar.<\/li><li>You only work with water, air, or gases at moderate temperatures: the piston-type <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv30\/\">PRV30<\/a> covers the same sizes.<\/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\">PRV44 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, bellows-balanced pressure reducing valve<\/td><\/tr><tr><th scope=\"row\">Sizes<\/th><td>DN15 (\u00bd\u2033), DN20 (\u00be\u2033), and DN25 (1\u2033)<\/td><\/tr><tr><th scope=\"row\">Connections<\/th><td>BSP or NPT thread \u00b7 EN PN16\/25 flanges \u00b7 ANSI CL150 flanges<\/td><\/tr><tr><th scope=\"row\">Pressure rating<\/th><td>PN25<\/td><\/tr><tr><th scope=\"row\">Maximum inlet pressure<\/th><td>25 barg<\/td><\/tr><tr><th scope=\"row\">Outlet pressure ranges<\/th><td>0.5 \u2013 3 barg \u00b7 1 \u2013 8 barg \u00b7 4 \u2013 12 barg (depending on spring)<\/td><\/tr><tr><th scope=\"row\">Kv coefficient<\/th><td>2 m\u00b3\/h (DN15) \u00b7 2.5 m\u00b3\/h (DN20) \u00b7 3.5 m\u00b3\/h (DN25). Reduced Kv on request<\/td><\/tr><tr><th scope=\"row\">Temperature<\/th><td>\u221230 to +210 \u00b0C<\/td><\/tr><tr><th scope=\"row\">Fluids<\/th><td>Group 2 liquids and gases: steam, water, compressed air, nitrogen, fuel oil, gases<\/td><\/tr><tr><th scope=\"row\">Materials<\/th><td>Body, cap, internals, and bellows in AISI 316L stainless steel. Graphite-filled PTFE seat and PTFE gaskets<\/td><\/tr><tr><th scope=\"row\">Bellows<\/th><td>Stainless steel, microplasma-welded<\/td><\/tr><tr><th scope=\"row\">Mounting position<\/th><td>Recommended in a horizontal pipe; the design allows other positions<\/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>Body and cap in super duplex \u00b7 weld ends (socket weld or butt weld) \u00b7 clamp connection \u00b7 degreased for oxygen service \u00b7 EPDM, PEEK, Viton, or Aflas 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\">\u00bd\u2033 threaded<\/th><th scope=\"col\">\u00be\u2033 threaded<\/th><th scope=\"col\">1\u2033 threaded<\/th><th scope=\"col\">DN15 EN<\/th><th scope=\"col\">DN20 EN<\/th><th scope=\"col\">DN25 EN<\/th><th scope=\"col\">DN15 ANSI<\/th><th scope=\"col\">DN20 ANSI<\/th><th scope=\"col\">DN25 ANSI<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">Kv (m\u00b3\/h)<\/th><td>2<\/td><td>2,5<\/td><td>3,5<\/td><td>2<\/td><td>2,5<\/td><td>3,5<\/td><td>2<\/td><td>2,5<\/td><td>3,5<\/td><\/tr><tr><th scope=\"row\">Length A \/ AA<\/th><td>108<\/td><td>108<\/td><td>108<\/td><td>130<\/td><td>150<\/td><td>160<\/td><td>184<\/td><td>184<\/td><td>184<\/td><\/tr><tr><th scope=\"row\">Height H1<\/th><td>135<\/td><td>135<\/td><td>135<\/td><td>135<\/td><td>135<\/td><td>135<\/td><td>135<\/td><td>135<\/td><td>135<\/td><\/tr><tr><th scope=\"row\">Height H2<\/th><td>185<\/td><td>185<\/td><td>185<\/td><td>185<\/td><td>185<\/td><td>185<\/td><td>185<\/td><td>185<\/td><td>185<\/td><\/tr><tr><th scope=\"row\">Flange \u00d8 D1<\/th><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>95<\/td><td>105<\/td><td>115<\/td><td>89<\/td><td>98<\/td><td>108<\/td><\/tr><tr><th scope=\"row\">Weight (kg)<\/th><td>3,5<\/td><td>3,5<\/td><td>3,5<\/td><td>5<\/td><td>5<\/td><td>5<\/td><td>5<\/td><td>5<\/td><td>5<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Dimensions in millimeters. The dimensioned drawings and the remaining flange dimensions are 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>Body<\/td><td>Stainless steel AISI 316L<\/td><\/tr><tr><th scope=\"row\">2<\/th><td>Sealing screw<\/td><td>AISI 316L<\/td><\/tr><tr><th scope=\"row\">3<\/th><td>Seat<\/td><td>Graphite-filled PTFE<\/td><\/tr><tr><th scope=\"row\">5<\/th><td>Seat<\/td><td>AISI 316L<\/td><\/tr><tr><th scope=\"row\">6<\/th><td>Gasket (x2)<\/td><td>PTFE<\/td><\/tr><tr><th scope=\"row\">7<\/th><td>Cap<\/td><td>AISI 316L<\/td><\/tr><tr><th scope=\"row\">8<\/th><td>Spring washer<\/td><td>Galvanized steel 1.1191<\/td><\/tr><tr><th scope=\"row\">9<\/th><td>Adjusting screw<\/td><td>Stainless steel A2-70<\/td><\/tr><tr><th scope=\"row\">10<\/th><td>Adjusting spring<\/td><td>Steel 52SiCrNi5 with epoxy paint (60\u2013100 microns)<\/td><\/tr><tr><th scope=\"row\">11<\/th><td>Bellows screw<\/td><td>AISI 316L<\/td><\/tr><tr><th scope=\"row\">12<\/th><td>Gasket cover<\/td><td>AISI 316L<\/td><\/tr><tr><th scope=\"row\">13<\/th><td>Bellows assembly<\/td><td>AISI 316L<\/td><\/tr><tr><th scope=\"row\">14<\/th><td>Allen screw<\/td><td>Stainless steel A2-70<\/td><\/tr><tr><th scope=\"row\">15<\/th><td>Gasket<\/td><td>Graphite-filled PTFE<\/td><\/tr><tr><th scope=\"row\">17<\/th><td>Stem<\/td><td>AISI 316L<\/td><\/tr><tr><th scope=\"row\">18<\/th><td>Seat guide<\/td><td>AISI 316L<\/td><\/tr><tr><th scope=\"row\">19<\/th><td>Closing spring<\/td><td>Stainless steel 302<\/td><\/tr><tr><th scope=\"row\">21<\/th><td>Bottom cover<\/td><td>AISI 316L<\/td><\/tr><tr><th scope=\"row\">22<\/th><td>Gasket<\/td><td>PTFE<\/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\">PRV44.SP2<\/th><td>Gasket kit<\/td><td>6 and 22<\/td><\/tr><tr><th scope=\"row\">PRV44.SP3<\/th><td>Bellows<\/td><td>13<\/td><\/tr><tr><th scope=\"row\">PRV44.SP4<\/th><td>Spring kit<\/td><td>10 and 19<\/td><\/tr><tr><th scope=\"row\">PRV44.SP6<\/th><td>Gasket and seat kit<\/td><td>3, 6, 15, and 22<\/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\"><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\">How the PRV44 works<\/h2><p class=\"wp-block-paragraph\">The PRV44 works by balancing the forces between the adjusting spring and the outlet pressure. The bellows-stem-seat assembly is what moves to open or close the passage. You can see it in the video.<\/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 adjusting spring (10) is compressed with the screw (9), the bellows-stem-seat assembly (13, 17, and 3) opens the valve and allows regulation.<\/li><li><b>Regulation.<\/b> When the outlet pressure exceeds the set value, the valve closes; when it drops, the valve opens again and lets through the flow being consumed.<\/li><li><b>Zero flow.<\/b> If the downstream valves are closed, the PRV44 absorbs the fluctuations and holds the outlet pressure at the set value.<\/li><\/ol><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 1920 \/ 1080;\" width=\"1920\" controls playsinline preload=\"none\" poster=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV30-44-700x700-1.jpg\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/PRV44-VIDEO.mp4\"><\/video><\/figure><p class=\"vf-note vf-s-d43169 wp-block-paragraph\">Video of the PRV44 model.<\/p><\/div><\/div><\/section><section id=\"instalacion\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">PRV44 installation<\/h2><p class=\"wp-block-paragraph\">This is the layout recommended by the manufacturer, with a bypass so that maintenance can be carried out without interrupting service. If the valve is installed in a bypass, it must be connected to the main pipe after the control line and with its own shutoff valves. See also 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>PRV44 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 debris or impurity can impair the seat.<\/li><li><b>Install a strainer<\/b> upstream to protect the seat.<\/li><li><b>Follow the arrow on the body<\/b> and, whenever possible, install the valve in a horizontal pipe. Some positions are permitted but not recommended, as the valve may not perform well in them.<\/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.<\/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 an 8 mm Allen key on the adjusting screw. Compressing the spring raises the outlet pressure; releasing it lowers it. Check the value on the outlet pressure gauge.<\/li><\/ol><p class=\"wp-block-paragraph\">The valve must be installed by qualified personnel and must never exceed the operating pressure and temperature for which it was sized. In ATEX zones, the valve must be equipotentially bonded to the installation. If the outlet pressure is unstable, review the <a href=\"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-problems\/\">most common problems with 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\">PRV44 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>PRV44 datasheet<\/b><span>PDF \u00b7 4 pages \u00b7 features, exploded view, installation diagram, and dimensions<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/wp-content\/uploads\/2026\/10\/PRV44-16-ESP.pdf\" aria-label=\"PDF PRV44 datasheet PDF \u00b7 4 pages \u00b7 features, exploded view, installation diagram, and dimensions\" rel=\"noopener\" target=\"_blank\"><\/a><\/p><\/div><div class=\"wp-block-group vf-doc vf-amb-enllac is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i>PDF<\/i><\/p><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><b>Operation and installation manual<\/b><span>PDF \u00b7 11 pages \u00b7 installation, ATEX, maintenance, and receiving<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/wp-content\/uploads\/2026\/10\/manual-PRV44-16B-ESP.pdf\" aria-label=\"PDF Operation and installation manual PDF \u00b7 11 pages \u00b7 installation, ATEX, maintenance, 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\">PRV44 vs. other Valfonta reducing valves<\/h2><p class=\"wp-block-paragraph\">Four reducing valves in the range handle steam: PRV44, PRV45, M1, and M2. This table helps you check whether the PRV44 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>PRV44<\/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-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-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 piston, bellows, or diaphragm, 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 PRV44<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Can the PRV44 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 its main application: it handles temperatures from \u221230 to 210 \u00b0C and has a graphite-filled PTFE seat. It is also suitable for water, compressed air, nitrogen, fuel oil, and other Group 2 gases.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is the difference between the PRV44 and the PRV30?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">They have the same sizes (DN15 to DN25), connections, Kv, outlet ranges, and dimensions. The <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv30\/\">PRV30<\/a> is piston-balanced and reaches 150 \u00b0C with Viton gaskets; the PRV44 is bellows-balanced and reaches 210 \u00b0C, so it handles steam.<\/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 interchangeable ranges: from 0.5 to 3 barg, from 1 to 8 barg, and from 4 to 12 barg. The inlet pressure can be up to 25 barg.<\/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 an 8 mm Allen key on the adjusting screw. Compressing the spring raises the outlet pressure; releasing it 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. Check the gaskets and wear parts according to the operating conditions; this can be done with the valve installed, depressurized, and isolated. There are four spare parts: gasket kit (PRV44.SP2), bellows (PRV44.SP3), spring kit (PRV44.SP4), and gasket and seat kit (PRV44.SP6).<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Does the PRV44 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. Given its size (DN15 to DN25) and pressure rating (PN25), 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 PRV44 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>Same sizes and dimensions, piston-type, for water, air, and gases.<\/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-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>Outlet pressures from 0.01 barg and steam up to 150 \u00b0C.<\/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 and up to 40 bar, for steam up to 200 \u00b0C, liquids, and gases.<\/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 PRV44<\/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 (steam, water, air\u2026) and operating temperature<\/li><li>Inlet pressure and desired outlet pressure<\/li><li>Maximum and minimum flow rate<\/li><li>Connection type (threaded or flanged)<\/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-f562-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"562\">\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\/661#wpcf7-f562-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=\"562\" \/><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-f562-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=\"1792698990.7bfb383d89953f4f\" \/>\n<\/fieldset>\n<input class=\"wpcf7-form-control wpcf7-hidden\" value=\"PRV44\" 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 (\u00bd\u2033)\">DN15 (\u00bd\u2033)<\/option><option value=\"DN20 (\u00be\u2033)\">DN20 (\u00be\u2033)<\/option><option value=\"DN25 (1\u2033)\">DN25 (1\u2033)<\/option><option value=\"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=\"steam, water, air\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\u203aPRV44 pressure reducing valve Pressure reducing valve \u00b7 Bellows-balanced PRV44 pressure reducing valve For steam Self-regulating, direct-acting reducing valve, balanced by a stainless steel bellows and made of AISI 316L. It keeps the outlet pressure constant even when the inlet pressure fluctuates, in steam, water, compressed air, and gases, from \u221230 to 210 ... <a title=\"PRV44 pressure reducing valve\" class=\"read-more\" href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv44\/\" aria-label=\"Read more about PRV44 pressure reducing valve\">Read more<\/a><\/p>\n","protected":false},"featured_media":181,"template":"","meta":{"_acf_changed":false,"_generate-full-width-content":"true","_generate-disable-headline":"true","rank_math_title":"PRV44 pressure reducing valve for steam | Valfonta","rank_math_description":"Direct-acting, bellows-balanced PRV44 pressure reducing valve in 316L stainless. For steam up to 210 \u00b0C, DN15 to DN25, PN25, outlet 0.5 to 12 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. 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It is its main application: it handles temperatures from \u221230 to 210 \u00b0C and has a graphite-filled PTFE seat. It is also suitable for water, compressed air, nitrogen, fuel oil, and other Group 2 gases.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between the PRV44 and the PRV30?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"They have the same sizes (DN15 to DN25), connections, Kv, outlet ranges, and dimensions. The PRV30 is piston-balanced and reaches 150 \u00b0C with Viton gaskets; the PRV44 is bellows-balanced and reaches 210 \u00b0C, so it handles steam.\"}},{\"@type\":\"Question\",\"name\":\"What outlet pressure can be set?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It depends on the adjusting spring. There are three interchangeable ranges: from 0.5 to 3 barg, from 1 to 8 barg, and from 4 to 12 barg. The inlet pressure can be up to 25 barg.\"}},{\"@type\":\"Question\",\"name\":\"How do you adjust the outlet pressure?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"With an 8 mm Allen key on the adjusting screw. Compressing the spring raises the outlet pressure; releasing it 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. Check the gaskets and wear parts according to the operating conditions; this can be done with the valve installed, depressurized, and isolated. There are four spare parts: gasket kit (PRV44.SP2), bellows (PRV44.SP3), spring kit (PRV44.SP4), and gasket and seat kit (PRV44.SP6).\"}},{\"@type\":\"Question\",\"name\":\"Does the PRV44 carry CE marking?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It does not need it. 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