{"id":697,"date":"2021-01-24T23:10:32","date_gmt":"2021-01-24T22:10:32","guid":{"rendered":"https:\/\/www.valfonta.com\/blog\/selection-of-control-valves\/"},"modified":"2026-10-15T12:11:29","modified_gmt":"2026-10-15T10:11:29","slug":"selection-of-control-valves","status":"publish","type":"post","link":"https:\/\/www.valfonta.com\/en\/blog\/selection-of-control-valves\/","title":{"rendered":"Control valve selection: everything you need to consider to avoid mistakes"},"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=\"\/en\/blog\/\">Blog<\/a><span class=\"vf-sep\">\u203a<\/span><span aria-current=\"page\">Control valve selection: everything you need to consider to avoid mistakes<\/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=\"\/en\/control-valve\/\">Control valves<\/a><\/p><h1 class=\"wp-block-heading\">Control valve selection: everything you need to consider to avoid mistakes<\/h1><p class=\"vf-post-meta wp-block-paragraph\"><span>By Valfonta<\/span><span><time datetime=\"2026-09-29\">Updated September 29, 2026<\/time><\/span><span>5 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\/manual-three-way-ball-valve-on-pipe-of-industrial-36K8FSQ.jpg\" alt=\"Control valve selection: everything you need to consider to avoid mistakes\" class=\"wp-image-250\" 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 select a control valve, you need to define its function (isolation, non-return, regulation, or safety), its nominal pressure or rating, the materials, the actuation system, and the size. The nominal pressure results from cross-referencing the effective working pressure and temperature, and the materials of the body, soft parts, packings, and bolting must withstand erosion, corrosion, and temperature. The size depends on the flow, cavitation, and differential pressure. Valfonta recommends its C1 model, designed for gases, vapors, and liquids.<\/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=\"#criterios-generales-para-encontrar-la-valvula-de-control-mas\">General criteria for finding the most suitable control valve<\/a><\/li><li><a href=\"#caracteristicas-de-las-valvulas-de-control-definicion-y-apli\">Control valve characteristics: definition and applications<\/a><\/li><li><a href=\"#la-valvula-de-control-c1-de-valfonta-caracteristicas-princip\">The Valfonta C1 control valve: main features<\/a><\/li><\/ol><\/details><h2 class=\"wp-block-heading\" id=\"criterios-generales-para-encontrar-la-valvula-de-control-mas\"><strong>General criteria for finding the most suitable control valve<\/strong><\/h2><p class=\"wp-block-paragraph\">In this post we will try to provide the basic points for choosing correctly and properly carrying out the <strong>selection of a control valve<\/strong> for your system or installation.\u00a0<\/p><p class=\"wp-block-paragraph\">What parameters would an applications engineer follow? The answer to that question involves quite a few variables, but broadly speaking, the <a href=\"\/en\/control-valve\/\"><strong>control valves <\/strong><\/a>of today, regardless of brand and of their commercially differentiating features, offer a wide range of possibilities.<\/p><h3 class=\"wp-block-heading\" id=\"funcion-de-la-valvula-de-control\"><strong>Control valve function<\/strong><\/h3><p class=\"wp-block-paragraph\">One of the factors worth being clear about when the time comes to <strong>choose your valve is its function;<\/strong> today, broadly speaking, control valves can perform four different functions:<strong> isolation, non-return, regulation, or safety. <\/strong><\/p><p class=\"wp-block-paragraph\">In the first case, what we are looking for is to fully interrupt and isolate the flow; in the second, the function is to prevent the flow from returning to the pressurized zone; in the other two cases, the functions are to regulate and modify the flow rate, or to ensure protection of the equipment in the event of excess pressure. <\/p><figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-de-control-scaled-1.jpg\" alt=\"control valve selection\" class=\"wp-image-161\" width=\"2560\" height=\"1440\" loading=\"lazy\"\/><\/figure><h3 class=\"wp-block-heading\" id=\"la-presion-nominal-en-la-seleccion-de-valvulas-de-control\"><strong>Nominal pressure in control valve selection<\/strong><\/h3><p class=\"wp-block-paragraph\">A very important factor to identify is<strong> the nominal pressure of the valve<\/strong>, also known as the <strong>\u201cRating.\u201d<\/strong> This value is derived from cross-referencing different data, such as the effective working pressure and the effective working temperature. <\/p><div class=\"wp-block-group vf-post-gallery vf-n2 is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-C1-PROVISIONAL-300x300-1.jpg\" alt=\"Control valve selection parameters\" class=\"wp-image-273\" width=\"300\" height=\"300\" loading=\"lazy\"\/><\/figure><figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/logo.png\" alt=\"Control valve selection parameters\" class=\"wp-image-254\" width=\"332\" height=\"83\" loading=\"lazy\"\/><\/figure><\/div><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>DIN<\/th><th>ANSI<\/th><\/tr><\/thead><tbody><tr><td>PN 10<\/td><td>Class 125<\/td><\/tr><tr><td>PN 16<\/td><td>Class 150<\/td><\/tr><tr><td>PN 25<\/td><td>Class 300<\/td><\/tr><tr><td>PN 40<\/td><td>Class 600<\/td><\/tr><tr><td>PN 64<\/td><td>Class 900<\/td><\/tr><tr><td>PN 100<\/td><td>Class 1500<\/td><\/tr><tr><td>PN 250<\/td><td>Class 2500<\/td><\/tr><\/tbody><\/table><\/figure><\/div><h3 class=\"wp-block-heading\" id=\"materiales-de-la-valvula-de-control-que-debe-tener-en-cuenta\"><strong>Control valve materials: What should you consider? <\/strong><\/h3><p class=\"wp-block-paragraph\">Once you have identified the nominal pressure of your valve, you need to look at the materials to avoid mistakes; there is a long list of factors: resistance to erosion and to fluid corrosion, the temperature the valve must withstand, and the chemical compatibility of the materials with the fluid; in essence, it is important to be clear about the pressure-retaining body, the soft parts and packings, as well as all the bolting and external coatings.\u00a0<\/p><p class=\"wp-block-paragraph\">Each of the parts must be made of the appropriate materials.<\/p><h3 class=\"wp-block-heading\" id=\"el-accionamiento-de-la-valvula-de-control\"><strong>Control valve actuation <\/strong><\/h3><p class=\"wp-block-paragraph\">To select your control valve correctly, you should also look at the actuation system, since current models can be actuated by different methods or systems.\u00a0<\/p><p class=\"wp-block-paragraph\">The first is manual; they can also be actuated by the fluid itself or by external components. It all depends on the needs of your installation: frequency of operation, available auxiliary power\u2026<\/p><div class=\"wp-block-group vf-post-gallery vf-n2 is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/hombre-trabajando_como-seleccionar-una-vlvula-de-control_VALFONTA-400x267-1.jpg\" alt=\"Control valve selection parameters\" class=\"wp-image-274\" width=\"400\" height=\"267\" loading=\"lazy\"\/><\/figure><figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-catalogo-400x350-1.jpg\" alt=\"Control valve selection parameters\" class=\"wp-image-275\" width=\"400\" height=\"350\" loading=\"lazy\"\/><\/figure><\/div><h3 class=\"wp-block-heading\" id=\"terminamos-con-el-tamano-de-la-valvula-de-control\"><strong>Finally, the size of the control valve<\/strong><\/h3><p class=\"wp-block-paragraph\">The size of the control valve must be chosen based on different parameters such as the <strong>line flow rate, cavitation, and differential pressure\u2026<\/strong><\/p><p class=\"wp-block-paragraph\">At <a href=\"\/en\/\" rel=\"noopener\" target=\"_blank\"><strong>Valfonta<\/strong><\/a> we know that all these concepts may sound somewhat unfamiliar if you are not well acquainted with the technical characteristics of your system.<\/p><p class=\"wp-block-paragraph\">If you would like us to help you select a control valve, simply contact our customer service department by filling out<a href=\"\/en\/contact\/\"><strong> this form.<\/strong><\/a><\/p><p class=\"wp-block-paragraph\">We would like to close by reminding you that we are not only specialists in control valves, but also have a high degree of specialization in <a href=\"\/en\/pressure-reducing-valves\/\"><strong>pressure reducing valves<\/strong>,<\/a> <a href=\"\/en\/pressure-relief-valve\/\"><strong>pressure relief valves<\/strong> <\/a>and other products such as steam or liquid <a href=\"\/en\/liquids-steam-injector\/\"><strong>injectors<\/strong> <\/a>and <a href=\"\/en\/liquid-steam-ejectors\/\"><strong>ejectors<\/strong><\/a> for all types of industrial systems.<\/p><p class=\"wp-block-paragraph\">We are a family business with a great many years of work behind us, which is the best guarantee for each of our customers. <\/p><h2 class=\"wp-block-heading\" id=\"caracteristicas-de-las-valvulas-de-control-definicion-y-apli\">Control valve characteristics: definition and applications<\/h2><p class=\"wp-block-paragraph\">To answer the question of <strong>how to select a control valve <\/strong>it helps to explain what it is and what its function is. A control valve is used to regulate the flow of a fluid, behaving like a variable-area orifice that modifies the pressure drop as dictated by the signal from a controller. \u200b It makes it possible to regulate the flow rate and other factors such as the temperature, level, or pressure of the fluid.<\/p><p class=\"wp-block-paragraph\">As general characteristics, it should be noted that it must withstand the temperature and pressure of the fluid without leaks, be properly sized for the flow to be controlled, and also resist the erosion or corrosion caused by the fluid it controls.<\/p><p class=\"wp-block-paragraph\">That said, to <a href=\"\/en\/control-valve\/\"><strong>choose a control valve <\/strong><\/a>correctly, several factors must be taken into account, which we detail below:<\/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\">Fluid it will handle\u00a0<\/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\">Inlet pressure and outlet pressure\u00a0<\/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\">Initial temperature\u00a0<\/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\">Pipe size<\/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\">Type of actuator required: it can be pneumatic (diaphragm or spring) or electric.\u00a0<\/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\">Flow rate\u00a0<\/p><\/div><\/div><h2 class=\"wp-block-heading\" id=\"la-valvula-de-control-c1-de-valfonta-caracteristicas-princip\">The Valfonta C1 control valve: main features<\/h2><p class=\"wp-block-paragraph\">This is our most characteristic model and the one we usually install for a long list of industrial applications.\u00a0<\/p><p class=\"wp-block-paragraph\">C1 control valves have been designed for the control of gases, vapors, and liquids in accordance with the European Pressure Equipment Directive. They are certified under the ISO 9001 quality system.<\/p><p class=\"wp-block-paragraph\">The modular concept of this valve and its wide range with different internals offer many possibilities and combinations. The body shape ensures optimal fluid regulation.<\/p><p class=\"wp-block-paragraph\">For proper use, it must be ensured that the control valve is used in areas with temperature and pressure values that do not exceed the operating values in the product specifications supplied with the order.\u00a0<\/p><p class=\"wp-block-paragraph\">If you need a custom solution, learn about our <a href=\"\/en\/control-valve-design\/\">control valve design<\/a> service or browse the range of <a href=\"\/en\/control-valve\/\">control valves<\/a>, including the <a href=\"\/en\/product\/c1-gas-control-valve\/\">C1 valve<\/a>.<\/p><\/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=\"#criterios-generales-para-encontrar-la-valvula-de-control-mas\">General criteria for finding the most suitable control valve<\/a><\/li><li><a href=\"#caracteristicas-de-las-valvulas-de-control-definicion-y-apli\">Control valve characteristics: definition and applications<\/a><\/li><li><a href=\"#la-valvula-de-control-c1-de-valfonta-caracteristicas-princip\">The Valfonta C1 control valve: main features<\/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 control 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=\"\/en\/control-valve\/\">View control 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=\"\/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=\"\/en\/pressure-reducing-valves\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Valvula-reductora-plateada.webp\" alt=\"Pressure reducing valves\" class=\"wp-image-228\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Pressure reducing valves<\/b><span>Valfonta pressure reducing valves: 8 models from DN8 to DN150 and up to 40 bar for steam, water, air, and gases.<\/span><\/a><\/li><li><a href=\"\/en\/pressure-relief-valve\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-alivio-presion-s3-s4-perspectiva-400.webp\" alt=\"Pressure relief valves\" class=\"wp-image-10230\" width=\"300\" height=\"300\" loading=\"lazy\"><b>Pressure relief valves<\/b><span>S1\u2013S4 and PRV53\u201355 range, from DN15 to DN150 and set pressure up to 20 barg.<\/span><\/a><\/li><\/ul><p class=\"vf-post-more wp-block-paragraph\"><a href=\"\/en\/control-valve\/\">View all control 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\/valvula-c1.jpg\" alt=\"\" class=\"wp-image-246\" 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>Control valves<\/small><b>What automatic control valves can you find at Valfonta?<\/b><span>5 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/en\/blog\/automatic-control-valves\/\" aria-label=\"Control valves What automatic control valves can you find at Valfonta? 5 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-de-control-de-presion-errores.webp\" alt=\"\" class=\"wp-image-235\" 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>Control valves<\/small><b>Common mistakes when using pressure control valves in industrial installations<\/b><span>12 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/en\/blog\/pressure-control-valves-common-mistakes\/\" aria-label=\"Control valves Common mistakes when using pressure control valves in industrial installations 12 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-de-control-tipos-1.webp\" alt=\"\" class=\"wp-image-239\" 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>Control valves<\/small><b>Control valve: types and recommendations from Valfonta<\/b><span>8 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/en\/blog\/control-valve-types-and-recommendations\/\" aria-label=\"Control valves Control valve: types and recommendations from Valfonta 8 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\/697#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=\"1792702957.ea3f2b5ec803b276\" \/>\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 select a control valve, you need to define its function (isolation, non-return, regulation, or safety), its pressure rating, the materials, the actuation system, and the size.<\/p>\n","protected":false},"author":1,"featured_media":250,"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":"Control valve selection | Valfonta","rank_math_description":"Control valve selection. Parameters, factors, and relevant data to consider to avoid mistakes of any kind.","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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Parameters, factors, and relevant data to consider to avoid mistakes of any kind.\",\"author\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"abstract\":\"To select a control valve, you need to define its function (isolation, non-return, regulation, or safety), its nominal pressure or rating, the materials, the actuation system, and the size. The nominal pressure results from cross-referencing the effective working pressure and temperature, and the materials of the body, soft parts, packings, and bolting must withstand erosion, corrosion, and temperature. The size depends on the flow, cavitation, and differential pressure. 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