{"id":723,"date":"2025-11-12T11:54:01","date_gmt":"2025-11-12T10:54:01","guid":{"rendered":"https:\/\/www.valfonta.com\/blog\/industrial-valve-for-gas\/"},"modified":"2026-10-22T10:06:46","modified_gmt":"2026-10-22T08:06:46","slug":"industrial-valve-for-gas","status":"publish","type":"post","link":"https:\/\/www.valfonta.com\/en\/blog\/industrial-valve-for-gas\/","title":{"rendered":"Pressure reducing valves: when to choose the M1 and M2 models"},"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\">Pressure reducing valves: when to choose the M1 and M2 models<\/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\">Pressure reducing valves: when to choose the M1 and M2 models<\/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>11 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-amarilla-destacada.webp\" alt=\"Pressure reducing valves: when to choose the M1 and M2 models\" class=\"wp-image-229\" 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\">Among Valfonta\u2019s self-operated pressure reducing valves, the M1 is the choice for steam and demanding processes, and the M2 for general services with fine control at low or medium pressure. The M1 regulates from 0.1 to 15 barg, operates up to 220 \u00b0C, seals the stem with a stainless steel bellows, and uses an external control line. The direct-acting M2 regulates from 0.02 to 10 barg, reaches 180 \u00b0C, and has internal sensing except on steam. With steam or liquids above 125 \u00b0C, both require a condensate water seal pot.<\/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=\"#guia-practica-para-escoger-entre-estos-dos-modelos-de-valvul\">A practical guide to choosing between these two pressure reducing valve models<\/a><\/li><li><a href=\"#que-es-una-valvula-reductora-de-presion-autoaccionada\">What is a self-operated pressure reducing valve?<\/a><\/li><li><a href=\"#aplicaciones-industriales-donde-instalar-cada-modelo\">Industrial applications: where to install each model?<\/a><\/li><li><a href=\"#guia-de-instalacion-y-buenas-practicas-m1-y-m2\">Installation guide and best practices (M1 and M2)<\/a><\/li><li><a href=\"#preguntas\">Frequently asked questions<\/a><\/li><\/ol><\/details><h2 class=\"wp-block-heading\" id=\"guia-practica-para-escoger-entre-estos-dos-modelos-de-valvul\"><strong>A practical guide to choosing between these two pressure reducing valve models<\/strong><\/h2><p class=\"wp-block-paragraph\">A self-operated pressure reducing valve is an essential device in any fluid system. <\/p><p class=\"wp-block-paragraph\">Its function is simple but critical: to reduce a high inlet pressure, which may vary, to a lower and, above all, constant outlet pressure. It does all this automatically, without the need for external power sources such as electricity or compressed air.<\/p><p class=\"wp-block-paragraph\">Choosing the right valve is vital to protect sensitive equipment \u201cdownstream,\u201d optimize process efficiency, and ensure operational safety. At Valfonta, two of our most reliable models for this task are the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\"><strong>M1<\/strong><\/a> and the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/\"><strong>M2.<\/strong><\/a><\/p><p class=\"wp-block-paragraph\">Although both are pressure reducing valves, they are designed with different characteristics to cover a wide range of industrial applications, from controlling high-purity gases to handling high-temperature steam. <\/p><p class=\"wp-block-paragraph\">In this guide, we analyze their differences to help you select the right model for your installation.<\/p><h2 class=\"wp-block-heading\" id=\"que-es-una-valvula-reductora-de-presion-autoaccionada\"><strong>What is a self-operated pressure reducing valve?<\/strong><\/h2><p class=\"wp-block-paragraph\">The term \u201cself-operated\u201d (or \u201cno auxiliary power\u201d) means that the valve uses the energy of the fluid itself to operate its internal mechanism. It requires no electrical wiring or instrument air lines, which makes these valves incredibly reliable, easy to install, and free of any maintenance cost in that respect.<\/p><p class=\"wp-block-paragraph\">Using a quality pressure reducing valve offers direct benefits for any system:<\/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>Equipment protection:<\/strong> This is the most common application. They prevent pressure gauges, heat exchangers, reactors, delicate instrumentation, and other equipment operating \u201cdownstream\u201d from being damaged by excessive pressure.<\/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>Process stability:<\/strong> Many industrial processes (chemical, pharmaceutical, food) require an exact and constant pressure to work properly. The pressure reducing valve ensures that, even if the inlet pressure fluctuates, the process always receives a stable pressure.<\/p><\/div><\/div><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>Efficiency and savings:<\/strong> In steam applications, reducing the pressure also reduces the temperature, optimizing energy use. Since it consumes no external energy to operate, its operating cost is zero.<\/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>Improved safety:<\/strong> By keeping the pressure within the design limits of the line, they reduce the risk of system failures. However, it is essential to understand that a pressure reducing valve is not a safety valve. Overpressure protection (such as a relief valve) must always be installed when the installation requires it.<\/p><\/div><\/div><h3 class=\"wp-block-heading\" id=\"el-modelo-m1-robustez-y-alto-rendimiento-para-vapor-y-gases\"><strong>The M1 model: robustness and high performance for steam and gases<\/strong><\/h3><p class=\"wp-block-paragraph\">When the application calls for greater robustness, a higher pressure range, or continuous operation at high temperatures, the M1 model is the right solution.<\/p><p class=\"wp-block-paragraph\">Unlike the M2, the M1 <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\"><strong>is a self-operated diaphragm and spring valve<\/strong><\/a>, designed specifically for more demanding duties with <strong>steam, compressed air, non-hazardous gases, and liquids<\/strong>.<\/p><p class=\"wp-block-paragraph\">Its internal design is built for maximum durability and minimal maintenance in severe conditions. Its most distinctive feature is the <strong>stem seal by means of a double-ply stainless steel bellows<\/strong>. This bellows completely isolates the fluid from the rest of the upper components, preventing leaks and wear on the stem, a critical point in high-temperature steam applications.<\/p><h3 class=\"wp-block-heading\" id=\"como-funciona-la-m1\"><strong>How does the M1 work?<\/strong><\/h3><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\">The outlet (downstream) pressure is transmitted through an <strong>external control line (L)<\/strong> to the diaphragm chamber (H).<\/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\">This pressure exerts a force on the diaphragm that opposes the force set on the springs (K) by means of the adjusting nut (F).<\/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\">This balance of forces moves the plug (C), opening or closing the passage to keep the outlet pressure stable.<\/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\">In large sizes (from DN65), it includes a balancing plunger (D) that cancels the effect of inlet pressure variations.<\/p><\/div><\/div><h3 class=\"wp-block-heading\" id=\"caracteristicas-destacadas-del-modelo-m1\"><strong>Key features of the M1 model<\/strong><\/h3><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>Robustness:<\/strong> Designed for high performance and fast response to changes in demand.<\/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>Bellows seal:<\/strong> Maximum reliability and durability, especially on 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>High temperature:<\/strong> Rated for operation up to <strong>220 \u00b0C<\/strong> (with EPDM+PTFE diaphragm and condensate pot).<\/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>Wide pressure range:<\/strong> Able to regulate the outlet pressure in ranges from 0.1 to 15 barg.<\/p><\/div><\/div><h3 class=\"wp-block-heading\" id=\"el-modelo-m2-precision-y-accion-directa-para-multiples-fluid\"><strong>The M2 model: precision and direct action for multiple fluids<\/strong><\/h3><p class=\"wp-block-paragraph\">The M2 valve is one of the<a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/\"><strong> most versatile and popular models<\/strong> <\/a>in our catalog. <strong>It is a <\/strong><strong>direct-acting<\/strong><strong> pressure reducing valve,<\/strong> which means that the outlet pressure acts directly on the internal diaphragm for fast, sensitive control.<\/p><p class=\"wp-block-paragraph\">Its design is optimized to work with a wide range of fluids, including gases (such as air, nitrogen, and others), liquids, and steam. Thanks to its high sensitivity, it is an ideal valve for applications that require very precise control, even at very low pressures, offering regulation ranges <strong>from 20 mbar to 10 bar<\/strong>.<\/p><h3 class=\"wp-block-heading\" id=\"como-funciona-la-m2\"><strong>How does the M2 work?<\/strong><\/h3><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\">The inlet (upstream) pressure reaches the valve and pushes the piston-plunger assembly, closing the passage automatically.<\/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\">Turning the adjusting screw compresses a spring that acts on the diaphragm.<\/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\">The diaphragm opens the valve plug (seat), allowing the fluid to pass until the outlet (downstream) pressure reaches the desired value.<\/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\">Any variation in the inlet pressure is absorbed by the balancing plunger, and any variation in the outlet pressure is detected by the diaphragm, which readjusts the plug to keep the set point pressure stable.<\/p><\/div><\/div><h3 class=\"wp-block-heading\" id=\"h4-caracteristicas-destacadas-del-modelo-m2\"><strong>H4: Key features of the M2 model<\/strong><\/h3><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>Direct-acting:<\/strong> Fast response and high sensitivity.<\/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>Materials:<\/strong> AISI 316 internals and PTFE seat, with options for a stainless steel actuator and gaskets made of a food-grade compound.<\/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>Diaphragm:<\/strong> It has a diaphragm reinforced with an intermediate fabric layer.<\/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>Pressure sensing point:<\/strong> The pressure sensing point is internal as standard, which greatly simplifies installation because no external control line is required (except in steam applications).<\/p><\/div><\/div><p class=\"wp-block-paragraph\">This precision makes it ideal for chemical laboratories, water distribution networks, plumbing installations, compressed air lines, fire protection systems, and inert gas control (tank inerting).<\/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>M1 Model Valve<\/strong><\/th><th><strong>M2 Model Valve<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>Operating Principle<\/strong><\/td><td>Self-operated by diaphragm<\/td><td>Direct-acting, diaphragm <\/td><\/tr><tr><td><strong>Compatible fluids<\/strong><\/td><td>Steam, compressed air, non-hazardous gases, liquids<\/td><td>Gases (air, nitrogen\u2026), liquids, steam<\/td><\/tr><tr><td><strong>Outlet Pressure Range (P.out)<\/strong><\/td><td>0.1 \u2013 15 barg (Wide range) <\/td><td>0.02 \u2013 10 barg (High precision) <\/td><\/tr><tr><td><strong>Maximum Temperature<\/strong><\/td><td>Up to 220\u00b0C (with EPDM+PTFE diaphragm)\u00a0<\/td><td>Up to 180\u00b0C (with EPDM+PTFE diaphragm) <\/td><\/tr><tr><td><strong>Stem Seal (Plug)<\/strong><\/td><td>Stainless Steel Bellows <\/td><td>Gaskets (NBR, EPDM, PTFE+GR, etc.)<\/td><\/tr><tr><td><strong>Pressure Sensing Point<\/strong><\/td><td>External (Control line required)<\/td><td>Internal (Standard) \/ External (For steam or optional) <\/td><\/tr><tr><td><strong>Inlet P. Compensation<\/strong><\/td><td>Yes (Plunger from DN65) <\/td><td>Yes (Plunger-balanced) <\/td><\/tr><\/tbody><\/table><\/figure><\/div><h2 class=\"wp-block-heading\" id=\"aplicaciones-industriales-donde-instalar-cada-modelo\"><strong> Industrial applications: where to install each model?<\/strong><\/h2><p class=\"wp-block-paragraph\">The choice between one model and the other will depend on the specific pressure and temperature conditions and the fluid in your installation.<\/p><h3 class=\"wp-block-heading\" id=\"cuando-elegir-la-valvula-m1\"><strong>When to choose the M1 valve<\/strong><\/h3><p class=\"wp-block-paragraph\">The <strong>M1 model<\/strong> is the ideal choice for more severe processes, where robustness, high temperatures, and a higher outlet pressure capacity are decisive factors.<\/p><p class=\"wp-block-paragraph\">Its design is intended for:<\/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>Steam circuits:<\/strong> This is its flagship application. The stainless steel bellows seal ensures a much longer service life and virtually zero maintenance compared with traditional gaskets on high-temperature steam (up to 220 \u00b0C).<\/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>High outlet pressures:<\/strong> When a higher regulation range is needed, the M1 reaches up to 15 barg.<\/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>High-demand lines:<\/strong> Ideal for main compressed air or gas lines with large variations in demand, where its response is fast and effective.<\/p><\/div><\/div><h3 class=\"wp-block-heading\" id=\"cuando-elegir-la-valvula-m2\"><strong>When to choose the M2 valve<\/strong><\/h3><p class=\"wp-block-paragraph\">The <strong>M2 model<\/strong> is the perfect choice for most general service applications and installations that require very fine control at low or medium pressures.<\/p><p class=\"wp-block-paragraph\">Its high sensitivity makes it the preferred option in:<\/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\">Chemical and pharmaceutical laboratories.<\/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\">Water distribution networks and plumbing installations.<\/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\">Compressed air lines for instrumentation.<\/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\">Fire protection systems.<\/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\">Inert gas control, such as nitrogen tank blanketing, where the pressure must be reduced to very low values (millibars) with great precision.<\/p><\/div><\/div><h2 class=\"wp-block-heading\" id=\"guia-de-instalacion-y-buenas-practicas-m1-y-m2\"><strong>Installation guide and best practices (M1 and M2)<\/strong><\/h2><p class=\"wp-block-paragraph\">Correct installation is the best guarantee of optimal performance and a long service life. Although the M1 and M2 have differences, both share fundamental installation principles that must be followed.<\/p><h3 class=\"wp-block-heading\" id=\"el-paso-n-1-limpieza-y-filtrado\">Step No. 1: cleaning and filtering<\/h3><p class=\"wp-block-paragraph\">Before mounting the valve, it is essential to clean the inside of the pipe very carefully to prevent any impurities or installation debris from impairing the correct operation of the seat.<\/p><p class=\"wp-block-paragraph\">For this reason, it is <strong>practically essential<\/strong> (and highly recommended) to install a <strong>strainer<\/strong> (Y-type) just upstream of the pressure reducing valve. This protects the seat and the plug from erosion and clogging, avoiding excessive maintenance and extending the service life of the equipment.<\/p><h3 class=\"wp-block-heading\" id=\"posicion-de-montaje-y-sentido-del-fluido\">Mounting position and flow direction<\/h3><p class=\"wp-block-paragraph\">Both models must be installed according to the <strong>arrow on the valve body<\/strong>; this arrow must always match the direction of fluid flow.<\/p><p class=\"wp-block-paragraph\">The standard and preferred mounting position is in a <strong>horizontal pipe<\/strong>.<\/p><ul class=\"wp-block-list\"><li><strong>For most fluids<\/strong> (gases and liquids above 0\u00b0C), the actuator (the upper part with the diaphragm and spring) must be installed in a <strong>vertical position, facing up<\/strong>.<\/li><li><strong>For gases and liquids up to 80\u00b0C<\/strong>, mounting in a horizontal pipe with the actuator in a <strong>vertical position, facing down<\/strong> is also possible.<\/li><\/ul><p class=\"wp-block-paragraph\"><strong>Important!<\/strong> Mounting the valve \u201con its side\u201d (that is, with the actuator stem in a horizontal position) is not permitted, as the valve would not behave correctly.<\/p><h3 class=\"wp-block-heading\" id=\"el-barrilete-tanque-de-condensacion-obligatorio-para-vapor\">The water seal pot (condensate pot): mandatory for steam<\/h3><p class=\"wp-block-paragraph\">This is one of the most important considerations for high-temperature applications.<\/p><p class=\"wp-block-paragraph\">The condensate water seal pot is <strong>mandatory<\/strong> whenever the fluid is <strong>steam<\/strong> or for <strong>liquids at temperatures above 125 \u00b0C<\/strong>.<\/p><p class=\"wp-block-paragraph\">Its function is to protect the diaphragm (the most heat-sensitive component) from overheating. The water seal pot creates a \u201cwater seal\u201d (condensate) between the hot fluid in the main line and the diaphragm, ensuring that the diaphragm always works at a safe temperature. Before start-up, this pot must be <strong>filled with water until it overflows<\/strong>.<\/p><h3 class=\"wp-block-heading\" id=\"la-tuberia-de-mando-toma-de-presion\">The control line (pressure sensing point)<\/h3><p class=\"wp-block-paragraph\">Here we find the main installation difference between the two models:<\/p><ul class=\"wp-block-list\"><li><strong>M2 model:<\/strong> It is supplied as standard with an <strong>internal pressure sensing point<\/strong>. This means that, for most liquid and gas applications, there is no need to install an external line, which greatly simplifies mounting.<\/li><li><strong>M1 model:<\/strong> It <strong>always<\/strong> requires an <strong>external control line<\/strong>.<\/li><li><strong>Exception (M2 on Steam):<\/strong> When the M2 valve is used for steam, the <strong>external pressure sensing point<\/strong> is mandatory, and it is connected to the condensate water seal pot.<\/li><\/ul><p class=\"wp-block-paragraph\">When an external control line is used (either on the M1 or on the M2 for steam), it must be connected in the reduced-pressure (downstream) zone. To avoid incorrect readings due to turbulence, it must be located at a minimum distance of <strong>1 meter from the valve outlet<\/strong> (or approximately 6-10 times the nominal diameter, DN).<\/p><h3 class=\"wp-block-heading\" id=\"valfonta-su-partner-experto-en-control-de-fluidos\"><strong> Valfonta: your expert partner in fluid control<\/strong><\/h3><p class=\"wp-block-paragraph\">The M1 and M2 models are just one part of our specialty in pressure reducing valves. At Valfonta we have an exceptional technical team that will help you from the very first moment to choose the exact valve that your system or installation requires.<\/p><p class=\"wp-block-paragraph\">Our catalog also includes a complete range of fluid control solutions, such as <strong>pressure relief valves<\/strong>, <strong>control valves<\/strong>, <strong>injectors<\/strong>, and <strong>ejectors<\/strong> for liquids and steam.<\/p><p class=\"wp-block-paragraph\">If you would like us to contact you to discuss which type of valve and which model suit you, just take a few seconds to fill out this form. You can also call us 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 main difference between the M1 and the M2?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">The main difference is the application. The <strong>M1<\/strong> model is designed for more robust and demanding applications, especially high-temperature steam (up to 220 \u00b0C) and higher outlet pressures (up to 15 barg). It uses a stainless steel bellows seal for maximum durability. The <strong>M2<\/strong> model is ideal for general services and applications that require high precision at lower outlet pressures, and it can regulate from 20 mbar.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Do I need a safety valve if I install an M1 or M2 pressure reducing valve?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\"><strong>Yes<\/strong>. This is a critical safety point. A pressure reducing valve controls the pressure, but <strong>it is not a safety valve<\/strong>. If there is a chance that the valve may fail (for example, due to dirt on the seat) and the inlet pressure passes \u201cdownstream,\u201d it could damage the equipment. Therefore, whenever necessary, overpressure protection, such as a Valfonta pressure relief valve, must be installed downstream of the pressure reducing valve.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What maintenance do these models require?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">The most important maintenance is preventive: installing a strainer at the inlet. Apart from this, the gaskets and parts subject to normal wear must be checked periodically and replaced if necessary, depending on the severity of the operating conditions. It is essential to always use genuine spare parts recommended by Valfonta.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What does it mean for a valve to be direct-acting?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">It is the operating principle of the M2 model. It means that the outlet (downstream) pressure acts directly on the valve diaphragm. This force, in balance with the adjusting spring, moves the plug to open or close the fluid passage. This design provides a very fast and sensitive response to pressure changes.<\/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=\"#guia-practica-para-escoger-entre-estos-dos-modelos-de-valvul\">A practical guide to choosing between these two pressure reducing valve models<\/a><\/li><li><a href=\"#que-es-una-valvula-reductora-de-presion-autoaccionada\">What is a self-operated pressure reducing valve?<\/a><\/li><li><a href=\"#aplicaciones-industriales-donde-instalar-cada-modelo\">Industrial applications: where to install each model?<\/a><\/li><li><a href=\"#guia-de-instalacion-y-buenas-practicas-m1-y-m2\">Installation guide and best practices (M1 and M2)<\/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-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.jpg\" alt=\"M2 diaphragm reducing valve\" class=\"wp-image-206\" 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\/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><\/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\/tipo-de-valvula.webp\" alt=\"\" class=\"wp-image-237\" 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>Valve guide<\/small><b>Complete valve guide: reducing, relief, and more<\/b><span>7 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"https:\/\/www.valfonta.com\/en\/blog\/types-of-industrial-valves\/\" aria-label=\"Valve guide Complete valve guide: reducing, relief, and more 7 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\/tuberias-gas-industriales-destacada.jpg\" alt=\"\" class=\"wp-image-169\" 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>Valve guide<\/small><b>Industrial valve classes: types, functions, and how to choose the right one<\/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\/types-of-industrial-valves-2\/\" aria-label=\"Valve guide Industrial valve classes: types, functions, and how to choose the right one 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\/valvulas-atex.webp\" alt=\"\" class=\"wp-image-234\" 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>Valve guide<\/small><b>Valves in explosive atmospheres: what do the ATEX regulations say?<\/b><span>4 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"https:\/\/www.valfonta.com\/en\/blog\/atex-valves\/\" aria-label=\"Valve guide Valves in explosive atmospheres: what do the ATEX regulations say? 4 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\/723#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=\"1792706814.a0dc4da8975eac8d\" \/>\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>Among Valfonta's self-operated pressure reducing valves, the M1 is the option for steam and demanding processes, and the M2 is for general services with fine control at low or medium pressure.<\/p>\n","protected":false},"author":1,"featured_media":229,"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":"Industrial valve for gas, liquids, and steam | Valfonta","rank_math_description":"Industrial valve for gas, liquids, and steam. Technical features of the M2 model for a long list of industrial systems and applications.","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\/industrial-valve-for-gas\/#webpage\",\"url\":\"https:\/\/www.valfonta.com\/en\/blog\/industrial-valve-for-gas\/\",\"name\":\"Industrial valve for gas, liquids, and steam | Valfonta\",\"description\":\"Industrial valve for gas, liquids, and steam. Technical features of the M2 model for a long list of industrial systems and applications.\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"en\",\"datePublished\":\"2025-11-12T11:54:01+02:00\",\"dateModified\":\"2026-04-08T13:37:38+02:00\",\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-amarilla-destacada.webp\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/industrial-valve-for-gas\/#breadcrumb\"}},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-amarilla-destacada.webp\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-amarilla-destacada.webp\",\"caption\":\"Pressure reducing valves: when to choose the M1 and M2 models\",\"inLanguage\":\"en\"},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-amarilla-destacada.webp\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-amarilla-destacada.webp\",\"width\":\"1000\",\"height\":\"1000\",\"caption\":\"yellow pressure reducing valve\",\"inLanguage\":\"en\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/industrial-valve-for-gas\/#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\":\"Pressure reducing valves: when to choose the M1 and M2 models\",\"item\":\"https:\/\/www.valfonta.com\/en\/blog\/industrial-valve-for-gas\/\"}]},{\"@type\":\"BlogPosting\",\"keywords\":\"industrial gas valve\",\"datePublished\":\"2025-11-12T11:54:01+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\/industrial-valve-for-gas\/#richSnippet\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/industrial-valve-for-gas\/#webpage\"},\"image\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-amarilla-destacada.webp\"},\"inLanguage\":\"en\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/industrial-valve-for-gas\/#webpage\"},\"headline\":\"Pressure reducing valves: when to choose the M1 and M2 models\",\"name\":\"Industrial valve for gas, liquids, and steam | Valfonta\",\"description\":\"Industrial valve for gas, liquids, and steam. Technical features of the M2 model for a long list of industrial systems and applications.\",\"author\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"abstract\":\"Among Valfonta\u2019s self-operated pressure reducing valves, the M1 is the choice for steam and demanding processes, and the M2 for general services with fine control at low or medium pressure. The M1 regulates from 0.1 to 15 barg, operates up to 220 \u00b0C, seals the stem with a stainless steel bellows, and uses an external control line. The direct-acting M2 regulates from 0.02 to 10 barg, reaches 180 \u00b0C, and has internal sensing except on steam. With steam or liquids above 125 \u00b0C, both require a condensate water seal pot.\"},{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/industrial-valve-for-gas\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the main difference between the M1 and the M2?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The main difference is the application. The M1 model is designed for more robust and demanding applications, especially high-temperature steam (up to 220 \u00b0C) and higher outlet pressures (up to 15 barg). It uses a stainless steel bellows seal for maximum durability. The M2 model is ideal for general services and applications that require high precision at lower outlet pressures, and it can regulate from 20 mbar.\"}},{\"@type\":\"Question\",\"name\":\"Do I need a safety valve if I install an M1 or M2 pressure reducing valve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. This is a critical safety point. A pressure reducing valve controls the pressure, but it is not a safety valve. If there is a chance that the valve may fail (for example, due to dirt on the seat) and the inlet pressure passes \u201cdownstream,\u201d it could damage the equipment. Therefore, whenever necessary, overpressure protection, such as a Valfonta pressure relief valve, must be installed downstream of the pressure reducing valve.\"}},{\"@type\":\"Question\",\"name\":\"What maintenance do these models require?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The most important maintenance is preventive: installing a strainer at the inlet. Apart from this, the gaskets and parts subject to normal wear must be checked periodically and replaced if necessary, depending on the severity of the operating conditions. It is essential to always use genuine spare parts recommended by Valfonta.\"}},{\"@type\":\"Question\",\"name\":\"What does it mean for a valve to be direct-acting?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It is the operating principle of the M2 model. It means that the outlet (downstream) pressure acts directly on the valve diaphragm. This force, in balance with the adjusting spring, moves the plug to open or close the fluid passage. This design provides a very fast and sensitive response to pressure changes.\"}}]}]}]","footnotes":"","_vg_translation_of":"494","_vg_lang":"en","_vg_wpml_state":"{\"lang\":\"en\",\"trid\":\"684\",\"src\":\"es\"}"},"categories":[40],"tags":[],"class_list":["post-723","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general-guides"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/723","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=723"}],"version-history":[{"count":4,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/723\/revisions"}],"predecessor-version":[{"id":10394,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/723\/revisions\/10394"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media\/229"}],"wp:attachment":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media?parent=723"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/categories?post=723"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/tags?post=723"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}