{"id":725,"date":"2025-11-20T13:18:58","date_gmt":"2025-11-20T12:18:58","guid":{"rendered":"https:\/\/www.valfonta.com\/blog\/stainless-steel-pressure-reducing-valve\/"},"modified":"2026-10-07T12:35:04","modified_gmt":"2026-10-07T10:35:04","slug":"stainless-steel-pressure-reducing-valve","status":"publish","type":"post","link":"https:\/\/www.valfonta.com\/en\/blog\/stainless-steel-pressure-reducing-valve\/","title":{"rendered":"How to choose your stainless steel pressure reducing valve: the Valfonta PRV series"},"content":{"rendered":"<div class=\"wp-block-group vf-raiz vf-pl-articulo is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-cat-wrap is-layout-flow wp-block-group-is-layout-flow\"><article class=\"wp-block-group vf-pdp vf-post 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 class=\"vf-sep\">\u203a<\/span><a href=\"https:\/\/www.valfonta.com\/en\/blog\/\">Blog<\/a><span class=\"vf-sep\">\u203a<\/span><span aria-current=\"page\">How to choose your stainless steel pressure reducing valve: Valfonta\u2019s PRV series<\/span><\/p><\/nav><header class=\"wp-block-group vf-post-head is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-pdp-eyebrow wp-block-paragraph\"><a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">Pressure reducing valves<\/a><\/p><h1 class=\"wp-block-heading\">How to choose your stainless steel pressure reducing valve: Valfonta\u2019s PRV series<\/h1><p class=\"vf-post-meta wp-block-paragraph\"><span>By Valfonta<\/span><span><time datetime=\"2026-04-08\">Updated April 8, 2026<\/time><\/span><span>6 min read<\/span><\/p><\/header><figure class=\"wp-block-image size-full vf-post-hero is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Valvula-reductora-plateada.webp\" alt=\"How to choose your stainless steel pressure reducing valve: Valfonta\u2019s PRV series\" class=\"wp-image-228\" width=\"1200\" height=\"514\"\/><\/figure><div class=\"wp-block-group vf-post-grid is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-post-body is-layout-flow wp-block-group-is-layout-flow\"><aside class=\"wp-block-group vf-post-summary vfa-aria-label--In%20summary is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t wp-block-paragraph\">In summary<\/p><p class=\"wp-block-paragraph\">To choose an AISI 316L stainless steel pressure reducing valve, start from its balancing technology (piston, bellows, or diaphragm) according to the fluid and the outlet pressure. In Valfonta\u2019s PRV series, the PRV20 is the compact piston model, and the PRV30, also piston-balanced, serves gases and liquids in sanitary plants and process lines. The bellows-type PRV44 is the right choice for steam up to 210 \u00b0C, and the PRV45, with a large diaphragm, regulates gases from 0.01 bar (10 mbar). All of them can be mounted in any position.<\/p><\/aside><details class=\"wp-block-details vf-post-toc-m is-layout-flow wp-block-details-is-layout-flow\"><summary>Article contents<\/summary><ol class=\"wp-block-list\"><li><a href=\"#por-que-elegir-una-valvula-reductora-de-acero-inoxidable-ais\">Why choose an AISI 316L stainless steel pressure reducing valve?<\/a><\/li><li><a href=\"#la-serie-prv-4-modelos-3-tecnologias-de-equilibrado\">The PRV series: 4 models, 3 balancing technologies<\/a><\/li><li><a href=\"#tabla-comparativa-prv20-vs-prv30-vs-prv44-vs-prv45\">Comparison table: PRV20 vs. PRV30 vs. PRV44 vs. PRV45<\/a><\/li><li><a href=\"#preguntas\">Frequently asked questions<\/a><\/li><\/ol><\/details><p class=\"wp-block-paragraph\">A stainless steel pressure reducing valve is a crucial device for any application that demands maximum hygiene, high corrosion resistance, or specific chemical compatibility. <\/p><p class=\"wp-block-paragraph\">It is the de facto standard in sectors such as the pharmaceutical, chemical, food, and biotechnology industries.<\/p><p class=\"wp-block-paragraph\">However, not all stainless steel valves are the same. <\/p><p class=\"wp-block-paragraph\">The difficulty lies in choosing the right model among different internal operating technologies: is a piston-balanced, a bellows, or a diaphragm valve better?<\/p><p class=\"wp-block-paragraph\">In this guide, we analyze Valfonta\u2019s PRV series, our complete range manufactured in AISI 316L Stainless Steel, to help you identify the exact solution (PRV20, PRV30, PRV44, or PRV45) that your process needs.<\/p><h2 class=\"wp-block-heading\" id=\"por-que-elegir-una-valvula-reductora-de-acero-inoxidable-ais\"><strong>Why choose an AISI 316L stainless steel pressure reducing valve?<\/strong><\/h2><div class=\"wp-block-group vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>High corrosion resistance:<\/strong> Unlike other materials, 316L offers excellent durability against a wide range of aggressive fluids, demineralized water, pure gases, or steam.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>Sanitary compatibility:<\/strong> It is the preferred material for hygienic applications. It is essential in laboratories, pharmaceutical plants, and the food industry, since it does not contaminate the fluid. It is complemented by special gasket options (such as EPDM or Viton) or Clamp-type connections.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>Durability in harsh environments:<\/strong> The stainless steel body requires no paint and withstands chemical cleaning (CIP\/SIP) or aggressive environments (marine, chemical plants) perfectly without degrading.<\/p><\/div><\/div><p class=\"wp-block-paragraph\"><em>*This stainless steel foundation allows us to build reliable valves for any environment.<\/em><\/p><h2 class=\"wp-block-heading\" id=\"la-serie-prv-4-modelos-3-tecnologias-de-equilibrado\"><strong>The PRV series: 4 models, 3 balancing technologies<\/strong><\/h2><p class=\"wp-block-paragraph\">Although the entire PRV series is manufactured in 316L stainless steel, its internal technology defines its ideal application. At Valfonta, we use three different balancing principles to cover every need.<\/p><h3 class=\"wp-block-heading\" id=\"modelos-prv20-y-prv30-la-fiabilidad-del-equilibrado-por-pist\"><strong>PRV20 and PRV30 models: the reliability of piston balancing<\/strong><\/h3><p class=\"wp-block-paragraph\">These models are direct-acting valves that are <strong>piston-balanced<\/strong>. Inside, a piston moves to compensate for inlet pressure fluctuations, ensuring that the outlet pressure remains constant. They are the most robust and reliable solution for most <strong>gases (such as compressed air or nitrogen) and liquids<\/strong>.<\/p><div class=\"wp-block-group vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/\">PRV20 model<\/a>:<\/strong> It is the compact solution in the range, with sizes from <strong>1\/4\u2033 to 3\/4\u2033<\/strong>. It is perfect for installations in laboratories, machinery (OEM), or end-use points that require a reliable, compact stainless steel valve.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv30\/\">PRV30 model<\/a>:<\/strong> It is the \u201cbig brother\u201d of the PRV20, with sizes of <strong>1\/2\u2033 and 1\u2033<\/strong>. It shares the same piston principle, but it is designed as an all-purpose valve for sanitary plants, laboratories, and industrial process lines.<\/p><\/div><\/div><h3 class=\"wp-block-heading\" id=\"modelo-prv44-robustez-para-vapor-con-equilibrado-por-fuelle\"><strong>PRV44 model: robustness for steam with bellows balancing<\/strong><\/h3><p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv44\/\"><strong>PRV44 model<\/strong><\/a> uses a superior technology for high-temperature applications: <strong>bellows balancing<\/strong>. Instead of elastomer seals (such as NBR or Viton), the PRV44 seals the stem with an <strong>AISI 316L stainless steel bellows<\/strong>. This metal bellows completely isolates the fluid from the actuator and the adjusting spring.<\/p><p class=\"wp-block-paragraph\">This feature makes it the ideal valve for <strong>steam (its main application)<\/strong>, as well as for other fluids at high temperatures, withstanding up to <strong>210 \u00b0C<\/strong>.<\/p><h3 class=\"wp-block-heading\" id=\"modelo-prv45-alta-sensibilidad-para-gases-a-baja-presion\"><strong>PRV45 model: high sensitivity for low-pressure gases<\/strong><\/h3><p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv45\/\"><strong>PRV45 model<\/strong><\/a> is a highly specialized valve. Although it is piston-balanced internally, its unique feature is a <strong>large diaphragm actuator<\/strong>.<\/p><p class=\"wp-block-paragraph\">This large diaphragm (with diameters that vary according to the pressure range) gives it extreme sensitivity. It has been <strong>specially designed for gases that require a very low outlet pressure<\/strong>. It can precisely regulate pressures as low as <strong>0.01 bar (10 mbar)<\/strong>, which makes it perfect for nitrogen inerting, tank <i>blanketing<\/i>, or high-precision laboratory applications.<\/p><h2 class=\"wp-block-heading\" id=\"tabla-comparativa-prv20-vs-prv30-vs-prv44-vs-prv45\"><strong>Comparison table: PRV20 vs. PRV30 vs. PRV44 vs. PRV45<\/strong><\/h2><p class=\"wp-block-paragraph\">To help visualize the complete range and make a quick preselection easier, we have summarized the key specifications of the stainless steel PRV series in the following table:<\/p><div class=\"wp-block-group vf-tbl-wrap is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-table vf-post-table\"><table><thead><tr><th><strong>Features<\/strong><\/th><th><strong>PRV20 (Compact)<\/strong><\/th><th><strong>PRV30 (Standard)<\/strong><\/th><th><strong>PRV44 (Steam)<\/strong><\/th><th><strong>PRV45 (Sensitive)<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>Body Material<\/strong><\/td><td>316L stainless<\/td><td>316L stainless<\/td><td>316L stainless <\/td><td>316L stainless<\/td><\/tr><tr><td><strong>Mechanism<\/strong><\/td><td>Piston-Balanced <\/td><td>Piston-Balanced <\/td><td>Bellows-Balanced <\/td><td>Piston-Balanced (Diaphragm Actuator) <\/td><\/tr><tr><td><strong>Main Fluid<\/strong><\/td><td>Gases and Liquids<\/td><td>Gases and Liquids<\/td><td><strong>Steam<\/strong>, Gases, Liquids<\/td><td><strong>Gases (low P)<\/strong>, Steam, Liquids<\/td><\/tr><tr><td><strong>Max. Temp.<\/strong><\/td><td>150 \u00b0C (with Viton)<\/td><td>150\u00b0C (with Viton)<\/td><td><strong>210\u00b0C<\/strong><\/td><td>150 \u00b0C (with Viton)<\/td><\/tr><tr><td><strong>Outlet P. Range<\/strong><\/td><td>0.2 \u2013 20 barg <\/td><td>0.5 \u2013 12 barg 19<\/td><td>0.5 \u2013 12 barg 20<\/td><td><strong>0.01 \u2013 8 barg<\/strong><\/td><\/tr><tr><td><strong>Sizes (DN)<\/strong><\/td><td>1\/4\u2033 \u2013 3\/4\u2033<\/td><td>1\/2\u2033 \u2013 1\u2033 <\/td><td>1\/2\u2033 \u2013 1\u2033<\/td><td>1\/2\u2033 \u2013 1\u2033<\/td><\/tr><\/tbody><\/table><\/figure><\/div><h3 class=\"wp-block-heading\" id=\"flexibilidad-de-instalacion-una-ventaja-clave-de-la-serie-pr\"><strong>Installation flexibility: a key advantage of the PRV series<\/strong><\/h3><p class=\"wp-block-paragraph\">One of the great advantages of the entire PRV range (PRV20, PRV30, PRV44, and PRV45) is that their internal design allows them to be installed <strong>in any position<\/strong>. This offers enormous flexibility to the engineer or installer, who does not always have an optimal horizontal pipe run available.<\/p><p class=\"wp-block-paragraph\">Although they are very versatile, there are recommended positions to ensure the best performance:<\/p><div class=\"wp-block-group vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>Standard position:<\/strong> It is recommended to install them in a <strong>horizontal pipe<\/strong>, with the actuator (spring) in a <strong>vertical position facing up<\/strong>.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>Permitted position:<\/strong> They can also be mounted in a horizontal pipe with the <strong>actuator facing down<\/strong>.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>Not recommended position:<\/strong> Although mechanically possible, installing them with the actuator \u201con its side\u201d (in a horizontal position) is not recommended, as the valve might not work as precisely.<\/p><\/div><\/div><p class=\"wp-block-paragraph\">Regardless of the position, there are two golden rules that apply to all installations:<\/p><div class=\"wp-block-group vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>Cleaning and strainer installation:<\/strong> Before mounting the valve, the pipe must be cleaned of impurities. It is <strong>highly recommended to install a strainer<\/strong> just upstream of the valve to protect the seat and the plug from erosion or clogging.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>Start-up:<\/strong> When starting up the system, the isolation (shutoff) valves must be opened <strong>slowly<\/strong> to avoid water hammer that could damage the internal components of the valve<\/p><\/div><\/div><h4 class=\"wp-block-heading\"><strong>Valfonta\u2019s complete catalog for your installation<\/strong><\/h4><p class=\"wp-block-paragraph\">This range of PRV series stainless steel pressure reducing valves is just one part of the comprehensive solution that Valfonta offers for fluid control. Depending on your application, we also manufacture other series of pressure reducing valves (such as the M1 and M2), pressure relief valves, control valves, ejectors, and injectors.<\/p><p class=\"wp-block-paragraph\">Contact our technical team for expert advice. We will analyze your fluid, pressure, temperature, and flow rate to select the exact PRV model that your process needs.<\/p><p class=\"wp-block-paragraph\">You can fill out our contact form or call us directly at <a href=\"tel:+34933720888\"><strong>93 37 208 88<\/strong>.<\/a><\/p><section id=\"preguntas\" class=\"wp-block-group vf-post-faq is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Frequently asked questions<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is the difference between piston balancing (PRV30) and bellows balancing (PRV44)?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Both are excellent, but for different fluids. The piston of the <strong>PRV30<\/strong> is a robust solution ideal for <strong>gases and liquids<\/strong>. The bellows of the <strong>PRV44<\/strong> uses a metal seal that makes it the best option for <strong>steam<\/strong> and high-temperature applications (up to 210 \u00b0C).<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>I need to regulate nitrogen at a very low pressure (millibars). Which valve should I use?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">The <strong>PRV45<\/strong> model. It has been specifically designed for gases that require a low outlet pressure. Its large diaphragm actuator allows it to regulate pressures from <strong>0.01 bar<\/strong> (10 mbar).<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What does \u201cmaintenance-free\u201d mean?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">This term, used in our manuals, refers to the fact that the valves are self-operated and do not require lubrication, calibration, or constant adjustments. However, like any industrial equipment, the gaskets and parts subject to normal wear must be checked periodically and replaced if necessary. Genuine Valfonta spare parts must always be used.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Can I use the PRV44 (designed for steam) with liquids?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Yes. Although the PRV44 is the steam specialist, its design and materials make it perfectly suitable for group 2 <strong>liquids and gases<\/strong>.<\/p><\/div><\/details><\/section><\/div><aside class=\"wp-block-group vf-post-aside is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-post-sticky is-layout-flow wp-block-group-is-layout-flow\"><nav class=\"wp-block-group vf-post-toc vfa-aria-label--Article%20contents is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">In this article<\/p><ol class=\"wp-block-list\"><li><a href=\"#por-que-elegir-una-valvula-reductora-de-acero-inoxidable-ais\">Why choose an AISI 316L stainless steel pressure reducing valve?<\/a><\/li><li><a href=\"#la-serie-prv-4-modelos-3-tecnologias-de-equilibrado\">The PRV series: 4 models, 3 balancing technologies<\/a><\/li><li><a href=\"#tabla-comparativa-prv20-vs-prv30-vs-prv44-vs-prv45\">Comparison table: PRV20 vs. PRV30 vs. PRV44 vs. PRV45<\/a><\/li><li><a href=\"#preguntas\">Frequently asked questions<\/a><\/li><\/ol><\/nav><div class=\"wp-block-group vf-post-cta is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t wp-block-paragraph\">Do you need a pressure reducing valve?<\/p><p class=\"wp-block-paragraph\">We help you choose the right model and size for your installation.<\/p><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--pri\" href=\"#contactar\">Request a quote<\/a><\/p><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--sec\" href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">View pressure reducing valves<\/a><\/p><p class=\"vf-tel wp-block-paragraph\">Or call <a href=\"tel:+34933720888\">933 720 888<\/a><\/p><\/div><\/div><\/aside><\/div><section id=\"valvulas\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Related valves<\/h2><ul class=\"vf-rel wp-block-list\"><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.jpg\" alt=\"PRV20 reducing valve\" class=\"wp-image-215\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV20 reducing valve<\/b><span>316L stainless, DN8\u201320 and up to 40 bar inlet.<\/span><\/a><\/li><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.jpg\" alt=\"PRV44 reducing valve\" class=\"wp-image-207\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV44 reducing valve<\/b><span>316L stainless, DN15\u201325 and PN25; suitable for steam up to 210 \u00b0C.<\/span><\/a><\/li><\/ul><p class=\"vf-post-more wp-block-paragraph\"><a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">View all pressure reducing valves \u2192<\/a><\/p><\/section><section id=\"articulos\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Related articles<\/h2><div class=\"wp-block-group vf-post-cards vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-amb-enllac is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image vf-img-suelta\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/como-regular-una-valvula-reductora-de-presion.webp\" alt=\"\" class=\"wp-image-226\" width=\"400\" height=\"225\" loading=\"lazy\"><\/figure><div class=\"wp-block-group vf-in is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><small>Pressure reducing valves<\/small><b>How do you adjust a pressure reducing valve?<\/b><span>9 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"https:\/\/www.valfonta.com\/en\/blog\/how-it-regulate-a-pressure-reducing-valve\/\" aria-label=\"Pressure reducing valves How do you adjust a pressure reducing valve? 9 min read\"><\/a><\/p><\/div><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-amb-enllac is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image vf-img-suelta\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-que-es.webp\" alt=\"\" class=\"wp-image-247\" width=\"400\" height=\"225\" loading=\"lazy\"><\/figure><div class=\"wp-block-group vf-in is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><small>Pressure reducing valves<\/small><b>What is a steam pressure reducing valve?<\/b><span>14 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-for-steam-valfonta\/\" aria-label=\"Pressure reducing valves What is a steam pressure reducing valve? 14 min read\"><\/a><\/p><\/div><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-amb-enllac is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image vf-img-suelta\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/detalle-eyector-Valfonta.jpg\" alt=\"\" class=\"wp-image-231\" width=\"400\" height=\"225\" loading=\"lazy\"><\/figure><div class=\"wp-block-group vf-in is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><small>Pressure reducing valves<\/small><b>Where should a pressure reducing valve be installed?<\/b><span>6 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"https:\/\/www.valfonta.com\/en\/blog\/where-the-pressure-reducing-valve-is-placed\/\" aria-label=\"Pressure reducing valves Where should a pressure reducing valve be installed? 6 min read\"><\/a><\/p><\/div><\/div><\/div><\/section><section id=\"contactar\" 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\">Can we help with your installation?<\/h2><p class=\"wp-block-paragraph\">Tell us the fluid, the inlet and outlet pressures, the temperature, and the flow rate, and we will recommend the right valve.<\/p><p class=\"vf-pdp-contact wp-block-paragraph\">You can also call <a href=\"tel:+34933720888\">933 720 888<\/a> or email <a href=\"mailto:valfonta@valfonta.com\">valfonta@valfonta.com<\/a>.<\/p><\/div>\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f535-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"535\">\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\/posts\/725#wpcf7-f535-o1\" method=\"post\" class=\"wpcf7-form init vf-form wpcf7-acceptance-as-validation\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\" toolname=\"consulta_contacto\" tooldescription=\"Send an enquiry to Valfonta, industrial valve manufacturer; a member of the team will reply.\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"535\" \/><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-f535-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=\"1792702973.30490b34c642e5ec\" \/>\n<\/fieldset>\n<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><label class=\"vf-full\">Reason for your inquiry<span class=\"wpcf7-form-control-wrap\" data-name=\"motivo\"><select class=\"wpcf7-form-control wpcf7-select\" aria-invalid=\"false\" name=\"motivo\"><option value=\"\">Select<\/option><option value=\"Request a quote\">Request a quote<\/option><option value=\"Technical advice on choosing a valve\">Technical advice on choosing a valve<\/option><option value=\"Spare parts or repair\">Spare parts or repair<\/option><option value=\"Documentation or certificates\">Documentation or certificates<\/option><option value=\"Other\">Other<\/option><\/select><\/span><\/label><label class=\"vf-full\">Message *<span class=\"wpcf7-form-control-wrap\" data-name=\"mensaje\"><textarea cols=\"40\" rows=\"5\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea wpcf7-validates-as-required\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Tell us what you need: fluid, pressures, flow rate, model, or serial number\u2026\" 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 message\" \/><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=\"#contactar\">Request a quote<\/a><\/p><\/div><\/article><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>To choose an AISI 316L stainless steel pressure reducing valve, start from its balancing technology (piston, bellows, or diaphragm) according to the fluid and the outlet pressure.<\/p>\n","protected":false},"author":1,"featured_media":228,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_generate-full-width-content":"true","_generate-disable-headline":"true","rank_math_title":"Stainless steel pressure reducing valve | Valfonta","rank_math_description":"Direct-acting stainless steel pressure reducing valve. Types, main features, and applications. Request information with no obligation.","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\":\"WebPage\",\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/stainless-steel-pressure-reducing-valve\/#webpage\",\"url\":\"https:\/\/www.valfonta.com\/en\/blog\/stainless-steel-pressure-reducing-valve\/\",\"name\":\"Stainless steel pressure reducing valve | Valfonta\",\"description\":\"Direct-acting stainless steel pressure reducing valve. Types, main features, and applications. Request information with no obligation.\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"en\",\"datePublished\":\"2025-11-20T13:18:58+02:00\",\"dateModified\":\"2026-04-08T13:37:38+02:00\",\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Valvula-reductora-plateada.webp\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/stainless-steel-pressure-reducing-valve\/#breadcrumb\"}},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Valvula-reductora-plateada.webp\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Valvula-reductora-plateada.webp\",\"caption\":\"How to choose your stainless steel pressure reducing valve: Valfonta\u2019s PRV series\",\"inLanguage\":\"en\"},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Valvula-reductora-plateada.webp\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Valvula-reductora-plateada.webp\",\"width\":\"999\",\"height\":\"1001\",\"caption\":\"Silver pressure reducing valve\",\"inLanguage\":\"en\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/stainless-steel-pressure-reducing-valve\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.valfonta.com\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Blog\",\"item\":\"https:\/\/www.valfonta.com\/en\/blog\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"How to choose your stainless steel pressure reducing valve: Valfonta\u2019s PRV series\",\"item\":\"https:\/\/www.valfonta.com\/en\/blog\/stainless-steel-pressure-reducing-valve\/\"}]},{\"@type\":\"BlogPosting\",\"keywords\":\"stainless steel pressure reducing valve\",\"datePublished\":\"2025-11-20T13:18:58+02:00\",\"dateModified\":\"2026-04-08T13:37:38+02:00\",\"articleSection\":\"Pressure reducing valves\",\"publisher\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/stainless-steel-pressure-reducing-valve\/#richSnippet\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/stainless-steel-pressure-reducing-valve\/#webpage\"},\"image\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Valvula-reductora-plateada.webp\"},\"inLanguage\":\"en\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/stainless-steel-pressure-reducing-valve\/#webpage\"},\"headline\":\"How to choose your stainless steel pressure reducing valve: Valfonta\u2019s PRV series\",\"name\":\"Stainless steel pressure reducing valve | Valfonta\",\"description\":\"Direct-acting stainless steel pressure reducing valve. Types, main features, and applications. Request information with no obligation.\",\"author\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"abstract\":\"To choose an AISI 316L stainless steel pressure reducing valve, start from its balancing technology (piston, bellows, or diaphragm) according to the fluid and the outlet pressure. In Valfonta\u2019s PRV series, the PRV20 is the compact piston model, and the PRV30, also piston-balanced, serves gases and liquids in sanitary plants and process lines. The bellows-type PRV44 is the right choice for steam up to 210 \u00b0C, and the PRV45, with a large diaphragm, regulates gases from 0.01 bar (10 mbar). All of them can be mounted in any position.\"},{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/stainless-steel-pressure-reducing-valve\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the difference between piston balancing (PRV30) and bellows balancing (PRV44)?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Both are excellent, but for different fluids. The piston of the PRV30 is a robust solution ideal for gases and liquids. The bellows of the PRV44 uses a metal seal that makes it the best option for steam and high-temperature applications (up to 210 \u00b0C).\"}},{\"@type\":\"Question\",\"name\":\"I need to regulate nitrogen at a very low pressure (millibars). Which valve should I use?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The PRV45 model. It has been specifically designed for gases that require a low outlet pressure. Its large diaphragm actuator allows it to regulate pressures from 0.01 bar (10 mbar).\"}},{\"@type\":\"Question\",\"name\":\"What does \u201cmaintenance-free\u201d mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This term, used in our manuals, refers to the fact that the valves are self-operated and do not require lubrication, calibration, or constant adjustments. However, like any industrial equipment, the gaskets and parts subject to normal wear must be checked periodically and replaced if necessary. Genuine Valfonta spare parts must always be used.\"}},{\"@type\":\"Question\",\"name\":\"Can I use the PRV44 (designed for steam) with liquids?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Although the PRV44 is the steam specialist, its design and materials make it perfectly suitable for group 2 liquids and gases.\"}}]}]}]","footnotes":"","_vg_translation_of":"495","_vg_lang":"en","_vg_wpml_state":"{\"lang\":\"en\",\"trid\":\"686\",\"src\":\"es\"}"},"categories":[36],"tags":[],"class_list":["post-725","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pressure-reducing-valves"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/725","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/comments?post=725"}],"version-history":[{"count":2,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/725\/revisions"}],"predecessor-version":[{"id":10203,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/725\/revisions\/10203"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media\/228"}],"wp:attachment":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media?parent=725"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/categories?post=725"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/tags?post=725"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}