{"id":695,"date":"2025-06-10T16:47:01","date_gmt":"2025-06-10T14:47:01","guid":{"rendered":"https:\/\/www.valfonta.com\/blog\/pressure-reducing-valve-problems\/"},"modified":"2026-10-07T12:33:38","modified_gmt":"2026-10-07T10:33:38","slug":"pressure-reducing-valve-problems","status":"publish","type":"post","link":"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-problems\/","title":{"rendered":"What problems do pressure reducing valves commonly have?"},"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\">What problems do pressure reducing valves commonly have?<\/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\/pressure-reducing-valves\/\">Pressure reducing valves<\/a><\/p><h1 class=\"wp-block-heading\">What problems do pressure reducing valves commonly have?<\/h1><p class=\"vf-post-meta wp-block-paragraph\"><span>By Valfonta<\/span><span><time datetime=\"2026-04-08\">Updated April 8, 2026<\/time><\/span><span>6 min read<\/span><\/p><\/header><figure class=\"wp-block-image size-full vf-post-hero is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/portada_1_como-seleccionar-una-vlvula-de-control_Valfonta.jpg\" alt=\"What problems do pressure reducing valves commonly have?\" class=\"wp-image-236\" 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\">The five most common problems with a pressure reducing valve are: the controlled pressure overshoots under normal load, it is exceeded under light loads, the valve fails to open, the outlet pressure is low, or the valve fails to close. The most frequent cause is dirt between the head and seat of the main or pilot valve, or clogged orifices, screen, strainer, or sensing line. Wear, incorrect sizing, bypass leaks, the pilot setting, or a ruptured diaphragm also play a part.<\/p><\/aside><details class=\"wp-block-details vf-post-toc-m is-layout-flow wp-block-details-is-layout-flow\"><summary>Article contents<\/summary><div class=\"wp-block-group vf-t-ol 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\"><a href=\"#los-5-problemas-con-la-valvula-reductora-de-presion-que-mas-\">The 5 most common pressure reducing valve problems<\/a><\/p><ol class=\"wp-block-list\"><li><a href=\"#la-presion-controlada-se-dispara-en-condiciones-normales-de-\">The controlled pressure overshoots under normal load conditions<\/a><\/li><li><a href=\"#la-presion-controlada-se-sobrepasa-solo-con-cargas-ligeras\">The controlled pressure is exceeded only under light loads<\/a><\/li><li><a href=\"#la-valvula-reductora-de-presion-falla-al-abrir\">The pressure reducing valve fails to open<\/a><\/li><li><a href=\"#la-presion-de-salida-es-baja\">The outlet pressure is low<\/a><\/li><li><a href=\"#la-valvula-reductora-de-presion-falla-al-cerrar\">The pressure reducing valve fails to close<\/a><\/li><li><a href=\"#en-valfonta-somos-su-fabrica-de-valvulas-reductoras-de-presi\">Valfonta: your trusted pressure reducing valve manufacturer<\/a><\/li><\/ol><\/div><\/div><\/details><p class=\"wp-block-paragraph\">When it comes to addressing concerns about the <strong>problems that can arise with a pressure reducing valve,<\/strong> it is essential to start by giving a detailed explanation of <strong>how these valves work.<\/strong><\/p><p class=\"wp-block-paragraph\">This question commonly attracts interest both from users who already have these valves in their systems and from those who are considering installing them.<\/p><p class=\"wp-block-paragraph\">It is important to understand that <a href=\"\/en\/\"><strong>pressure reducing valves,<\/strong><\/a> also known as pressure regulators, <strong>are critical components in the management of gas and hydraulic systems.<\/strong><\/p><p class=\"wp-block-paragraph\">These valves are designed to convert a high inlet pressure <strong>into a lower, constant outlet pressure<\/strong>, thus ensuring safe and efficient system operation.<\/p><p class=\"wp-block-paragraph\">They work regardless of variations in inlet pressure or in downstream flow demand. This is essential in <strong>applications where a precise outlet pressure is required<\/strong> to prevent damage to equipment while ensuring efficient operation.<\/p><p class=\"wp-block-paragraph\">In addition to their primary role in regulating pressure, these valves also <strong>help minimize the risk of water hammer and reduce noise in the piping<\/strong>, contributing to smoother, less troublesome system operation. A thorough understanding of how to select and maintain these valves can make <strong>a big difference in preventing common problems,<\/strong> such as premature wear and system failure due to incorrectly regulated pressure.<\/p><h2 class=\"wp-block-heading\" id=\"los-5-problemas-con-la-valvula-reductora-de-presion-que-mas-\"><strong>The 5 most common pressure reducing valve problems <\/strong><\/h2><p class=\"wp-block-paragraph\">Using steam in any manufacturing process is very efficient and economical, but if the parts that handle the steam are not working at their optimal capacity, this could lead to extra costs that ruin what was originally intended as an efficient use of resources. <\/p><p class=\"wp-block-paragraph\">If you are using a part of this type, <strong>below we explain the main problems that can arise with a pressure reducing valve.<\/strong><\/p><h3 class=\"wp-block-heading\" id=\"la-presion-controlada-se-dispara-en-condiciones-normales-de-\"><strong>The controlled pressure overshoots under normal load conditions <\/strong><\/h3><p class=\"wp-block-paragraph\">This could mean that something is preventing <strong>the valve from closing tightly under normal<\/strong> operating conditions. There are two main reasons why your pressure reducing valve may fail due to excess controlled pressure under normal load conditions: <\/p><ul class=\"wp-block-list\"><li><i><\/i>Dirt or foreign material has lodged between the pilot valve seat and the head.<\/li><li><i><\/i>Foreign particles have lodged between the head and seat of the main valve.<\/li><\/ul><p class=\"wp-block-paragraph\">To solve this problem, <strong>you must inspect and clean the space between the head and the seat.<\/strong> We also recommend making sure that the pressure sensing line is not blocked, by removing, inspecting, and cleaning the orifices and piping.<\/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\/valvula-de-alivio-de-presion-regulable-2.webp\" alt=\"pressure reducing valve problems\" class=\"wp-image-270\" width=\"1000\" height=\"1000\" 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-reductora-de-presion-inoxidable_VALFONTA.jpg\" alt=\"pressure reducing valve problems\" class=\"wp-image-271\" width=\"1000\" height=\"1000\" loading=\"lazy\"\/><\/figure><\/div><h3 class=\"wp-block-heading\" id=\"la-presion-controlada-se-sobrepasa-solo-con-cargas-ligeras\"><strong>The controlled pressure is exceeded only under light loads<\/strong><\/h3><p class=\"wp-block-paragraph\">There are <strong>four main reasons<\/strong> why your pressure reducing valve may fail by overshooting under light load conditions: <\/p><ul class=\"wp-block-list\"><li><i><\/i>The main valve head and seat may be worn or have dirt between them. To fix this, inspect and clean the valve head and seat.<\/li><li><i><\/i>The valve may be greatly oversized. In this case, you should proceed to repair the part.<\/li><li><i><\/i>The bypass valve does not close tightly or is leaking. As in the previous case, you must check and repair the part.<\/li><li><i><\/i>There is dirt or foreign material on the stem and guide of the main valve. To solve this, you will need to remove, inspect, and clean the parts.<\/li><\/ul><h3 class=\"wp-block-heading\" id=\"la-valvula-reductora-de-presion-falla-al-abrir\"><strong>The pressure reducing valve fails to open <\/strong><\/h3><p class=\"wp-block-paragraph\">There are six fundamental reasons why the valve may not open. Below we share each of them, along with its solution:<\/p><div class=\"wp-block-group vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The main valve is ruptured:<\/strong> disconnect the copper tube connection and crack open the bypass valve. If steam comes out of the main valve diaphragm housing, the diaphragm is defective and must be replaced.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The orifice is clogged:<\/strong> remove and clean.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The pilot valve seat is clogged with dirt:<\/strong> disassemble the head and seat assembly, and inspect and clean or replace.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The screen is clogged:<\/strong> inspect the screen and clean it.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The line strainer is clogged:<\/strong> inspect and clean; the pilot valve setting or the air loading pressure is not correctly adjusted.<\/p><\/div><\/div><h3 class=\"wp-block-heading\" id=\"la-presion-de-salida-es-baja\"><strong>The outlet pressure is low <\/strong><\/h3><p class=\"wp-block-paragraph\">There are five main reasons why your supply pressure is low, causing your pressure reducing valve to fail:\u00a0<\/p><div class=\"wp-block-group vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The pilot valve is not set correctly:<\/strong> adjust it to the desired 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>The valve is undersized:<\/strong> check the actual load against the valve\u2019s rated capacity to determine whether this is the cause.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The steam supply pressure is too low:<\/strong> check the steam supply pressure and correct it.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The main valve diaphragm is ruptured:<\/strong> disconnect the copper tube connection and crack open the bypass valve. If steam comes out of the diaphragm housing, the diaphragm is defective and must be replaced.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The bleed orifice is missing:<\/strong> replace with the correct fitting.<\/p><\/div><\/div><figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-de-presion-para-vapor-3.webp\" alt=\"pressure reducing valve problems\" class=\"wp-image-272\" width=\"1000\" height=\"1000\" loading=\"lazy\"\/><\/figure><h3 class=\"wp-block-heading\" id=\"la-valvula-reductora-de-presion-falla-al-cerrar\"><strong>The pressure reducing valve fails to close <\/strong><\/h3><p class=\"wp-block-paragraph\">There are five main reasons why the valve does not close, causing your pressure reducing valve to fail:\u00a0<\/p><div class=\"wp-block-group vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The bypass valve is open or leaking:<\/strong> check it and repair it if necessary.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The pilot sensing line is blocked (or not installed):<\/strong> remove, inspect, clean, or install.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The pilot is ruptured, meaning water or steam is coming out of the pilot at the spring retainer area:<\/strong> replace the pilot diaphragm assembly.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The pilot assembly or the main valve seat threads are leaking:<\/strong> check the casting in the seat area for erosion.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>The main valve diaphragm was reassembled without the return spring, and the main valve cover is holding the valve head closed:<\/strong> with the main valve cover installed, loosen all the main valve diaphragm bolts and then retighten them.<\/p><\/div><\/div><h3 class=\"wp-block-heading\" id=\"en-valfonta-somos-su-fabrica-de-valvulas-reductoras-de-presi\"><strong>Valfonta: your trusted pressure reducing valve manufacturer<\/strong><\/h3><p class=\"wp-block-paragraph\">At <a href=\"\/en\/\">Valfonta<\/a>, we are a family-owned company with more than 50 years of experience in valve manufacturing. All our products <strong>carry the guarantee of a brand with long experience in the sector.<\/strong><\/p><p class=\"wp-block-paragraph\"> So if you have <strong>any questions about our valves,<\/strong> or if you need custom valves, contact us and we will get to work for you right away.<\/p><p class=\"wp-block-paragraph\">You can do so by calling <strong><a href=\"tel:+34933720888\">933720888<\/a><\/strong>, sending an email to <strong><a href=\"mailto:valfonta@valfonta.com\">valfonta@valfonta.com<\/a><\/strong>, or filling in the <strong><a href=\"\/en\/contact\/\">form<\/a><\/strong> on our website. We look forward to hearing from you!<\/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><div class=\"wp-block-group vf-t-ol 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\"><a href=\"#los-5-problemas-con-la-valvula-reductora-de-presion-que-mas-\">The 5 most common pressure reducing valve problems<\/a><\/p><ol class=\"wp-block-list\"><li><a href=\"#la-presion-controlada-se-dispara-en-condiciones-normales-de-\">The controlled pressure overshoots under normal load conditions<\/a><\/li><li><a href=\"#la-presion-controlada-se-sobrepasa-solo-con-cargas-ligeras\">The controlled pressure is exceeded only under light loads<\/a><\/li><li><a href=\"#la-valvula-reductora-de-presion-falla-al-abrir\">The pressure reducing valve fails to open<\/a><\/li><li><a href=\"#la-presion-de-salida-es-baja\">The outlet pressure is low<\/a><\/li><li><a href=\"#la-valvula-reductora-de-presion-falla-al-cerrar\">The pressure reducing valve fails to close<\/a><\/li><li><a href=\"#en-valfonta-somos-su-fabrica-de-valvulas-reductoras-de-presi\">Valfonta: your trusted pressure reducing valve manufacturer<\/a><\/li><\/ol><\/div><\/div><\/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=\"\/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=\"\/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=\"\/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><li><a href=\"\/en\/product\/pressure-reducing-valve-prv30\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-prv30-frontal-400.webp\" alt=\"PRV30 reducing valve\" class=\"wp-image-199\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV30 reducing valve<\/b><span>316L stainless, from DN15 to DN25, threaded or flanged, up to 25 bar.<\/span><\/a><\/li><\/ul><p class=\"vf-post-more wp-block-paragraph\"><a href=\"\/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\/engineering-communications-at-the-gas-station-KGAC2SB.jpg\" alt=\"\" class=\"wp-image-232\" width=\"400\" height=\"225\" loading=\"lazy\"><\/figure><div class=\"wp-block-group vf-in is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><small>Pressure reducing valves<\/small><b>Types of industrial pressure reducing valves<\/b><span>12 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/en\/blog\/types-of-industrial-pressure-reducing-valves\/\" aria-label=\"Pressure reducing valves Types of industrial pressure reducing valves 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\/detalle-eyector-Valfonta.jpg\" alt=\"\" class=\"wp-image-231\" width=\"400\" height=\"225\" loading=\"lazy\"><\/figure><div class=\"wp-block-group vf-in is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><small>Pressure reducing valves<\/small><b>Pressure reducing valve symbols: characteristics and representations<\/b><span>6 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/en\/blog\/pressure-reducing-valves-symbology\/\" aria-label=\"Pressure reducing valves Pressure reducing valve symbols: characteristics and representations 6 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\/ejemplos-de-valvulas-de-Valfonta.webp\" alt=\"\" class=\"wp-image-168\" width=\"400\" height=\"225\" loading=\"lazy\"><\/figure><div class=\"wp-block-group vf-in is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><small>Pressure reducing valves<\/small><b>Pressure reducing valves: applications and industries where they are essential<\/b><span>8 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/en\/blog\/pressure-reducing-valves-applications\/\" aria-label=\"Pressure reducing valves Pressure reducing valves: applications and industries where they are essential 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\/695#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=\"1792701604.269b274d26afc4f1\" \/>\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>The five most common problems with a pressure reducing valve are the controlled pressure rising too high under normal load, overshooting under light loads, the valve not opening, low outlet pressure, and the valve not closing.<\/p>\n","protected":false},"author":1,"featured_media":236,"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":"Pressure reducing valve problems | Valfonta","rank_math_description":"Pressure reducing valve problems. The main issues with pressure regulating valves and how to solve them.","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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The main issues with pressure regulating valves and how to solve them.\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"en\",\"datePublished\":\"2025-06-10T16:47:01+02:00\",\"dateModified\":\"2026-04-08T13:37:43+02:00\",\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/portada_1_como-seleccionar-una-vlvula-de-control_Valfonta.jpg\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-problems\/#breadcrumb\"}},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/portada_1_como-seleccionar-una-vlvula-de-control_Valfonta.jpg\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/portada_1_como-seleccionar-una-vlvula-de-control_Valfonta.jpg\",\"caption\":\"What problems do pressure reducing valves commonly have?\",\"inLanguage\":\"en\"},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/portada_1_como-seleccionar-una-vlvula-de-control_Valfonta.jpg\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/portada_1_como-seleccionar-una-vlvula-de-control_Valfonta.jpg\",\"width\":\"1000\",\"height\":\"1000\",\"caption\":\"how to select a control valve\",\"inLanguage\":\"en\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-problems\/#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\":\"What problems do pressure reducing valves commonly have?\",\"item\":\"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-problems\/\"}]},{\"@type\":\"BlogPosting\",\"keywords\":\"pressure reducing valve problems\",\"datePublished\":\"2025-06-10T16:47:01+02:00\",\"dateModified\":\"2026-04-08T13:37:43+02:00\",\"articleSection\":\"Pressure reducing valves\",\"publisher\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-problems\/#richSnippet\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-problems\/#webpage\"},\"image\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/portada_1_como-seleccionar-una-vlvula-de-control_Valfonta.jpg\"},\"inLanguage\":\"en\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-problems\/#webpage\"},\"headline\":\"What problems do pressure reducing valves commonly have?\",\"name\":\"Pressure reducing valve problems | Valfonta\",\"description\":\"Pressure reducing valve problems. The main issues with pressure regulating valves and how to solve them.\",\"author\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"abstract\":\"The five most common problems with a pressure reducing valve are: the controlled pressure overshoots under normal load, it is exceeded under light loads, the valve fails to open, the outlet pressure is low, or the valve fails to close. The most frequent cause is dirt between the head and seat of the main or pilot valve, or clogged orifices, screen, strainer, or sensing line. Wear, incorrect sizing, bypass leaks, the pilot setting, or a ruptured diaphragm also play a part.\"}]}]","footnotes":"","_vg_translation_of":"479","_vg_lang":"en","_vg_wpml_state":"{\"lang\":\"en\",\"trid\":\"654\",\"src\":\"es\"}"},"categories":[36],"tags":[],"class_list":["post-695","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pressure-reducing-valves"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/695","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=695"}],"version-history":[{"count":2,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/695\/revisions"}],"predecessor-version":[{"id":10181,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/695\/revisions\/10181"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media\/236"}],"wp:attachment":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media?parent=695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/categories?post=695"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/tags?post=695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}