{"id":675,"date":"2026-07-20T15:25:07","date_gmt":"2026-07-20T13:25:07","guid":{"rendered":"https:\/\/www.valfonta.com\/blog\/types-of-industrial-valves-2\/"},"modified":"2026-10-22T10:08:54","modified_gmt":"2026-10-22T08:08:54","slug":"types-of-industrial-valves-2","status":"publish","type":"post","link":"https:\/\/www.valfonta.com\/en\/blog\/types-of-industrial-valves-2\/","title":{"rendered":"Industrial valve classes: types, functions, and how to choose the right one"},"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\">Industrial valve classes: types, functions, and how to choose the right one<\/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\">Industrial valve classes: types, functions, and how to choose the right one<\/h1><p class=\"vf-post-meta wp-block-paragraph\"><span>By Valfonta<\/span><span><time datetime=\"2026-07-28\">Updated July 28, 2026<\/time><\/span><span>9 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\/tuberias-gas-industriales-destacada.jpg\" alt=\"Industrial valve classes: types, functions, and how to choose the right one\" class=\"wp-image-169\" 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\">An industrial valve is a mechanical device that controls the passage of a fluid (liquid, gas, or steam) to shut it off, regulate its flow or pressure, or protect the installation against overpressure. By function, valves fall into three classes: isolation or shutoff (gate, ball, butterfly, globe), regulation and control, and safety and relief. All of them share a plug, a stem, and a seat. To keep the outlet pressure stable, a reducing valve is used, such as Valfonta\u2019s M1, M2, PRV20, PRV30, PRV44, PRV45, and VD.<\/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=\"#que-es-una-valvula-industrial-y-como-esta-formada\">What an industrial valve is and how it is built<\/a><\/li><li><a href=\"#clases-de-valvulas-industriales-segun-su-funcion\">Industrial valve classes by function<\/a><\/li><li><a href=\"#valvulas-reductoras-de-presion-valfonta-la-gama-para-regular\">Valfonta pressure reducing valves: the range for regulating your installation<\/a><\/li><li><a href=\"#preguntas\">Frequently asked questions<\/a><\/li><\/ol><\/details><p class=\"wp-block-paragraph\">Every industrial installation <strong>carries liquids, gases, or steam that must be directed, metered, or stopped with precision.<\/strong> That is the job of industrial valves, a critical component for process safety and efficiency. <\/p><p class=\"wp-block-paragraph\">There are many classes of industrial valves, and choosing the right one depends on the function it must perform. In this guide we explain what an industrial valve is, how valves are classified by function, and <strong>how to choose the right model,<\/strong> with particular attention to <a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\"><strong>pressure reducing valves<\/strong><\/a>, Valfonta\u2019s specialty.<\/p><h2 class=\"wp-block-heading\" id=\"que-es-una-valvula-industrial-y-como-esta-formada\"><strong>What an industrial valve is and how it is built<\/strong><\/h2><p class=\"wp-block-paragraph\">Before reviewing the different classes, it helps to understand what an industrial valve is and which elements all models have in common.<\/p><h3 class=\"wp-block-heading\" id=\"definicion-y-funcion-de-una-valvula-industrial\"><strong>Definition and function of an industrial valve<\/strong><\/h3><p class=\"wp-block-paragraph\">An industrial valve <strong>is a mechanical device that controls the flow of a fluid\u2014liquid, gas, or steam\u2014within a system<\/strong>. Depending on the type, it can fully open or close the passage, regulate the flow, maintain a given pressure, or protect the installation by discharging fluid in the event of overpressure. <\/p><p class=\"wp-block-paragraph\">It is, therefore, the element that makes it possible <strong>to operate a process in a controlled<\/strong> and safe manner, adapting the flow to the needs of each installation. <\/p><p class=\"wp-block-paragraph\">Valves are manufactured in a wide variety of materials\u2014<strong>stainless steel, bronze, special steels<\/strong>\u2014depending on the <strong>fluid, the temperature, and the required resistance<\/strong> <strong>to corrosion<\/strong>, and they are found in virtually every industry: chemical, food, pharmaceutical, energy, and water.<\/p><h3 class=\"wp-block-heading\" id=\"partes-principales-obturador-eje-y-asiento\"><strong>Main parts: plug, stem, and seat<\/strong><\/h3><p class=\"wp-block-paragraph\">Although there are many designs, industrial valves share three essential parts whose functions complement one another:<\/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>Plug:<\/strong> the moving element that physically shuts off the passage of the fluid.<\/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>Stem:<\/strong> guides and holds the plug to allow or block the flow of liquids and gases.<\/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>Seat:<\/strong> provides the tight seal through contact with the plug.<\/p><\/div><\/div><p class=\"wp-block-paragraph\">Starting from these elements, each manufacturer develops specific designs according to the working fluid, pressure, and temperature. At Valfonta, we manufacture these components to strict quality standards at our facilities in Badalona.<\/p><h3 class=\"wp-block-heading\" id=\"por-que-es-clave-elegir-la-clase-de-valvula-adecuada\"><strong>Why choosing the right valve class is key<\/strong><\/h3><p class=\"wp-block-paragraph\">Each valve class is designed for a specific function. <strong>Using a shutoff valve to regulate flow, or a regulating valve to isolate a line, causes premature wear, pressure drops, noise, and even safety risks. <\/strong><\/p><p class=\"wp-block-paragraph\">For example, permanently throttling a ball valve in an attempt to regulate flow damages the seat and eventually compromises tightness; the right choice for that function is a regulating valve. Choosing the right class\u2014and sizing it correctly\u2014ensures reliable operation, extends the service life of the installation, and avoids unnecessary maintenance costs. That is why it pays to know the main valve families and how they differ.<\/p><h2 class=\"wp-block-heading\" id=\"clases-de-valvulas-industriales-segun-su-funcion\"><strong>Industrial valve classes by function<\/strong><\/h2><p class=\"wp-block-paragraph\">The most useful way to classify industrial valves is by the function they perform in the system. These are the three major families.<\/p><h3 class=\"wp-block-heading\" id=\"valvulas-de-aislamiento-o-corte\"><strong>Isolation or shutoff valves<\/strong><\/h3><p class=\"wp-block-paragraph\">Their purpose is to fully allow or block the passage of the fluid, without regulating intermediate flow; they operate fully open or fully closed. They are used to isolate pipe sections, equipment, or parts of an installation during maintenance or operation. The most common models in this family are:<\/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>Gate valve:<\/strong> closes by means of a plate that lowers perpendicular to the flow. It offers very low pressure drop when open and is ideal for isolating sections that are operated infrequently.<\/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>Ball valve:<\/strong> a bored sphere rotates a quarter turn to open or close. It is fast, tight, and very reliable, and is widely used for general shutoff of liquids and gases.<\/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>Butterfly valve:<\/strong> a disc rotates on its stem inside the pipe. It is compact and lightweight, suitable for large sizes and for installations where space and weight matter.<\/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>Globe valve:<\/strong> although it can throttle the flow, it is also used for shutoff when good tightness is required. Its linear stroke is well suited to steam lines and demanding services.<\/p><\/div><\/div><p class=\"wp-block-paragraph\">The choice between these models depends on the size, the operating frequency, the allowable pressure drop, and the required tightness.<\/p><h3 class=\"wp-block-heading\" id=\"valvulas-de-regulacion-y-control-de-presion\"><strong>Pressure regulating and control valves<\/strong><\/h3><p class=\"wp-block-paragraph\">These valves do more than open or close: <strong>they continuously modulate the flow or pressure to keep the process at the desired value.<\/strong> Within this group, the pressure reducing valve is one of the most important: <strong>it reduces the outlet pressure and keeps it stable downstream, regardless of variations in inlet pressure or line demand. <\/strong><\/p><p class=\"wp-block-paragraph\">Depending on their operating principle, reducing valves can be direct-acting\u2014the most common, simple, and reliable\u2014or pilot-operated, which gain precision with high flow rates or large pressure drops. This family also includes <a href=\"https:\/\/www.valfonta.com\/en\/product\/c1-gas-control-valve\/\"><strong>control valves with pneumatic or electric actuators,<\/strong><\/a> which adjust the flow based on an external signal from the control system and are key in automated processes. This is the family in which Valfonta specializes, with a wide range of reducing valves that we will cover in the next section.<\/p><h3 class=\"wp-block-heading\" id=\"valvulas-de-seguridad-y-alivio-de-presion\"><strong>Safety and pressure relief valves<\/strong><\/h3><p class=\"wp-block-paragraph\">Their function is to protect the installation and people. The <a href=\"https:\/\/www.valfonta.com\/en\/pressure-relief-valve\/\"><strong>pressure relief (or excess pressure) valve<\/strong><\/a> acts when the fluid <strong>is about to exceed the established limits,<\/strong> discharging part of the flow to prevent leaks, ruptures, or explosions. <\/p><p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.valfonta.com\/en\/safety-valves\/\"><strong>Safety valves<\/strong> <\/a>play an equivalent role in boilers and pressure equipment, opening quickly in the event of overpressure. This family often also includes check or non-return valves, which prevent the fluid from flowing in the opposite direction and protect upstream pumps and equipment. <\/p><p class=\"wp-block-paragraph\">Unlike reducing valves, which regulate continuously, <strong>these valves act only occasionally, as a protective mechanism<\/strong>. You can learn more about <a href=\"https:\/\/www.valfonta.com\/en\/blog\/what-difference-between-safety-valve-and-relief-valve\/\"><strong>the difference between a safety valve and a relief valve<\/strong><\/a> on our blog.<\/p><h2 class=\"wp-block-heading\" id=\"valvulas-reductoras-de-presion-valfonta-la-gama-para-regular\"><strong>Valfonta pressure reducing valves: the range for regulating your installation<\/strong><\/h2><p class=\"wp-block-paragraph\">Among regulating valves, pressure reducing valves are Valfonta\u2019s main specialty. We manufacture a complete range capable of covering virtually any industrial application, from steam and gases to liquids and special services. They are used <strong>in industries as diverse as chemicals and pharmaceuticals, food, energy, water treatment, and steam processes,<\/strong> where maintaining a stable working pressure is decisive for process quality and safety.<\/p><h3 class=\"wp-block-heading\" id=\"por-que-elegir-una-valvula-reductora-de-presion-valfonta\"><strong>Why choose a Valfonta pressure reducing valve<\/strong><\/h3><p class=\"wp-block-paragraph\">With more than 50 years manufacturing and designing pressure regulating valves, at Valfonta <strong>we study each installation to propose the valve best suited to its operating conditions. <\/strong><\/p><p class=\"wp-block-paragraph\">Our reducing valves stand out for their regulation reliability, their ease of installation and maintenance, and the option of being manufactured with custom materials and configurations (different bodies, gaskets, connections, or oxygen service).<strong> All manufacturing takes place in Spain, which ensures responsive technical support and short lead times.<\/strong><\/p><p class=\"wp-block-paragraph\">This customization capability is what sets a specialized manufacturer apart from a mere distributor: when an application calls for a specific Kv coefficient, a material resistant to an aggressive fluid, or a particular connection, the valve is adapted to the process, not the other way around. The result <strong>is more precise regulation, a longer service life, and fewer incidents over time.<\/strong><\/p><h3 class=\"wp-block-heading\" id=\"modelos-de-valvula-reductora-de-presion-de-valfonta\"><strong>Valfonta pressure reducing valve models<\/strong><\/h3><p class=\"wp-block-paragraph\">This is the range of reducing valves available in the Valfonta catalog. Each model is designed for a type of fluid and application:<\/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><tbody><tr><th>Model<\/th><th>Type<\/th><th>Typical application<\/th><\/tr><tr><td><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\">M1 reducing valve<\/a><\/td><td>Self-operated by diaphragm<\/td><td>Steam, compressed air, liquids, and non-hazardous gases<\/td><\/tr><tr><td><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/\">M2 reducing valve<\/a><\/td><td>Direct-acting, diaphragm<\/td><td>Gases (air, nitrogen), liquids, and steam; blanketing (DN15\u2013DN100)<\/td><\/tr><tr><td><a href=\"https:\/\/www.valfonta.com\/en\/product\/bellow-pressure-reducing-valve\/\">M2 bellows reducing valve<\/a><\/td><td>Direct-acting with bellows<\/td><td>Easy adjustment, installation in any position<\/td><\/tr><tr><td><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/\">PRV20 reducing valve<\/a><\/td><td>Self-operated by piston<\/td><td>Chemical laboratories, sanitary plants, sprinklers<\/td><\/tr><tr><td><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv30\/\">PRV30 reducing valve<\/a><\/td><td>Direct-acting, piston (AISI 316)<\/td><td>Stable pressure 0.5\u201312 bar; options for O\u2082 and special materials<\/td><\/tr><tr><td><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv44\/\">PRV44 reducing valve<\/a><\/td><td>Direct-acting with bellows<\/td><td>Steam and fine regulation in industry<\/td><\/tr><tr><td><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv45\/\">PRV45 reducing valve<\/a><\/td><td>Direct-acting<\/td><td>General industrial pressure regulation<\/td><\/tr><tr><td><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/\">VD reducing valve<\/a><\/td><td>Self-operated<\/td><td>Constant downstream pressure in industry<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"wp-block-paragraph\">You can see all models, sizes, and datasheets in the <strong><a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">pressure reducing valves<\/a><\/strong><strong> category,<\/strong> and compare them with our <strong><a href=\"https:\/\/www.valfonta.com\/en\/pressure-relief-valve\/\">pressure relief valves<\/a><\/strong> and <strong><a href=\"https:\/\/www.valfonta.com\/en\/control-valve\/\">control valves<\/a>.<\/strong><\/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 an industrial valve?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">It is a mechanical device that controls the passage of a fluid (liquid, gas, or steam) in an installation. Depending on its class, it can shut off the flow, regulate the flow rate, maintain a pressure, or protect the system against overpressure.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>How many types of industrial valves are there?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">There are many models, but they fall into three major classes by function: isolation or shutoff valves (gate, ball, butterfly, globe), regulating and control valves (pressure reducing valves, control valves), and safety and pressure relief valves.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What are the parts of a valve?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">The three parts common to every industrial valve are the plug (shuts off the passage of the fluid), the stem (guides and holds the plug), and the seat (provides the tight seal through contact with the plug).<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is a pressure reducing valve and what is it used for?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">It is a regulating valve that reduces the outlet pressure and keeps it stable downstream, regardless of variations in inlet pressure. It protects the installation against leaks and failures and ensures a constant working pressure.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is the difference between a reducing valve and a relief valve?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">A reducing valve regulates continuously to keep the pressure at a working value. A relief valve is a safety device that acts only when a limit is exceeded, discharging fluid to protect the system. One regulates; the other protects.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>How do you choose the right industrial valve?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">You need to assess the inlet and outlet pressure, the flow rate, the type of fluid, the temperature, the ambient conditions, the required precision, and the applicable regulations. For a critical application, the safest approach is to consult a specialized manufacturer that will study the system.<\/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=\"#que-es-una-valvula-industrial-y-como-esta-formada\">What an industrial valve is and how it is built<\/a><\/li><li><a href=\"#clases-de-valvulas-industriales-segun-su-funcion\">Industrial valve classes by function<\/a><\/li><li><a href=\"#valvulas-reductoras-de-presion-valfonta-la-gama-para-regular\">Valfonta pressure reducing valves: the range for regulating your installation<\/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\/c1-gas-control-valve\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-C1-PROVISIONAL-700x700-1.jpg\" alt=\"C1 control valve\" class=\"wp-image-183\" width=\"300\" height=\"300\" loading=\"lazy\"><b>C1 control valve<\/b><span>Single-seat globe valve with pneumatic actuator.<\/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.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><\/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\/valvula-reductora-amarilla-destacada.webp\" alt=\"\" class=\"wp-image-229\" 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>Pressure reducing valves: when to choose the M1 and M2 models<\/b><span>11 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"https:\/\/www.valfonta.com\/en\/blog\/industrial-valve-for-gas\/\" aria-label=\"Valve guide Pressure reducing valves: when to choose the M1 and M2 models 11 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\/675#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=\"1792702974.51991310497a4fa5\" \/>\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>An industrial valve is a mechanical device that controls the passage of a fluid (liquid, gas, or steam) to shut it off, regulate its flow or pressure, or protect the installation against overpressure.<\/p>\n","protected":false},"author":1,"featured_media":169,"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 classes and their functions | Valfonta","rank_math_description":"What an industrial valve is, what classes exist by function, and how to choose the right one. With Valfonta\u2019s range of pressure reducing valves.","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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With Valfonta\u2019s range of pressure reducing valves.\",\"author\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"dateModified\":\"2026-07-28T10:51:27+02:00\",\"abstract\":\"An industrial valve is a mechanical device that controls the passage of a fluid (liquid, gas, or steam) to shut it off, regulate its flow or pressure, or protect the installation against overpressure. By function, valves fall into three classes: isolation or shutoff (gate, ball, butterfly, globe), regulation and control, and safety and relief. All of them share a plug, a stem, and a seat. To keep the outlet pressure stable, a reducing valve is used, such as Valfonta\u2019s M1, M2, PRV20, PRV30, PRV44, PRV45, and VD.\"},{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/types-of-industrial-valves-2\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is an industrial valve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It is a mechanical device that controls the passage of a fluid (liquid, gas, or steam) in an installation. Depending on its class, it can shut off the flow, regulate the flow rate, maintain a pressure, or protect the system against overpressure.\"}},{\"@type\":\"Question\",\"name\":\"How many types of industrial valves are there?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"There are many models, but they fall into three major classes by function: isolation or shutoff valves (gate, ball, butterfly, globe), regulating and control valves (pressure reducing valves, control valves), and safety and pressure relief valves.\"}},{\"@type\":\"Question\",\"name\":\"What are the parts of a valve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The three parts common to every industrial valve are the plug (shuts off the passage of the fluid), the stem (guides and holds the plug), and the seat (provides the tight seal through contact with the plug).\"}},{\"@type\":\"Question\",\"name\":\"What is a pressure reducing valve and what is it used for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It is a regulating valve that reduces the outlet pressure and keeps it stable downstream, regardless of variations in inlet pressure. It protects the installation against leaks and failures and ensures a constant working pressure.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between a reducing valve and a relief valve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A reducing valve regulates continuously to keep the pressure at a working value. A relief valve is a safety device that acts only when a limit is exceeded, discharging fluid to protect the system. One regulates; the other protects.\"}},{\"@type\":\"Question\",\"name\":\"How do you choose the right industrial valve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"You need to assess the inlet and outlet pressure, the flow rate, the type of fluid, the temperature, the ambient conditions, the required precision, and the applicable regulations. For a critical application, the safest approach is to consult a specialized manufacturer that will study the system.\"}}]}]}]","footnotes":"","_vg_translation_of":"467","_vg_lang":"en","_vg_wpml_state":"{\"lang\":\"en\",\"trid\":\"630\",\"src\":\"es\"}"},"categories":[40],"tags":[],"class_list":["post-675","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\/675","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=675"}],"version-history":[{"count":2,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/675\/revisions"}],"predecessor-version":[{"id":10389,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/675\/revisions\/10389"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media\/169"}],"wp:attachment":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media?parent=675"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/categories?post=675"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/tags?post=675"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}