{"id":715,"date":"2022-03-10T12:34:53","date_gmt":"2022-03-10T11:34:53","guid":{"rendered":"https:\/\/www.valfonta.com\/blog\/adjustable-pressure-relief-valve\/"},"modified":"2026-10-07T12:34:38","modified_gmt":"2026-10-07T10:34:38","slug":"adjustable-pressure-relief-valve","status":"publish","type":"post","link":"https:\/\/www.valfonta.com\/en\/blog\/adjustable-pressure-relief-valve\/","title":{"rendered":"How does an adjustable pressure relief valve work, and what are its applications?"},"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\">How does an adjustable pressure relief valve work and what are its applications?<\/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-relief-valve\/\">Pressure relief valves<\/a><\/p><h1 class=\"wp-block-heading\">How does an adjustable pressure relief valve work and what are its applications?<\/h1><p class=\"vf-post-meta wp-block-paragraph\"><span>By Valfonta<\/span><span><time datetime=\"2026-09-30\">Updated September 30, 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\/valvula-de-alivio-de-presion-regulable-1.webp\" alt=\"How does an adjustable pressure relief valve work and what are its applications?\" class=\"wp-image-249\" 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 adjustable pressure relief valve keeps the discharge opening closed with a plug and a calibrated spring, and opens when the pressure exceeds the pressure set on the spring, which is adjustable with a screw. Valfonta supplies it already set, with a spring whose range covers the set pressure without sitting at the end of the range. For steam it recommends the S1, for its fast response, and for non-hazardous gases and liquids, the S1, S2, or S3. For laboratories, distilleries, dry cleaners, or compressed air it proposes the PRV55, regulated by a diaphragm.<\/p><\/aside><details class=\"wp-block-details vf-post-toc-m is-layout-flow wp-block-details-is-layout-flow\"><summary>Article contents<\/summary><ol class=\"wp-block-list\"><li><a href=\"#por-que-son-tan-importantes-las-valvulas-de-alivio-de-presio\">Why are adjustable pressure relief valves so important?<\/a><\/li><li><a href=\"#como-funciona-una-valvula-de-alivio-de-presion-regulable\">How does an adjustable pressure relief valve work?<\/a><\/li><li><a href=\"#aplicaciones-de-una-valvula-de-alivio-de-presion-regulable\">Applications of an adjustable pressure relief valve<\/a><\/li><li><a href=\"#como-se-ajusta-el-tarado-en-la-practica\">How the set pressure is adjusted in practice<\/a><\/li><li><a href=\"#compre-sus-valvulas-de-alivio-de-presion-regulables-en-valfo\">Buy your adjustable pressure relief valves from Valfonta<\/a><\/li><\/ol><\/details><p class=\"wp-block-paragraph\">At <a href=\"\/en\/\"><strong>Valfonta<\/strong><\/a> we manufacture all kinds of mechanisms whose main function is to control pressure. Thanks to these mechanisms, we always ensure greater effectiveness and efficiency in any distribution system or in installations carrying fluids of various characteristics.<\/p><p class=\"wp-block-paragraph\">Thanks to our experience in this field, we can supply any type of <strong>adjustable pressure relief valve<\/strong> to anyone who needs it. In fact, we can even custom-build them for your installation or system.<\/p><h2 class=\"wp-block-heading\" id=\"por-que-son-tan-importantes-las-valvulas-de-alivio-de-presio\">Why are adjustable pressure relief valves so important?<\/h2><p class=\"wp-block-paragraph\">Keep in mind that using a <a href=\"\/en\/pressure-relief-valve\/\"><strong>pressure relief valve<\/strong><\/a> is vital if you want to avoid any damage to the piping or even possible leaks of both fluids and gases. In distribution networks, pressure is often quite high. It is in these cases that it becomes so necessary to reduce the pressure within the system and thus avoid annoying noise, vibration, or pipe perforations and the resulting leaks. For this reason, there are several <a href=\"\/en\/blog\/types-of-industrial-pressure-reducing-valves\/\"><strong>types of industrial pressure valves<\/strong><\/a>.<\/p><h2 class=\"wp-block-heading\" id=\"como-funciona-una-valvula-de-alivio-de-presion-regulable\">How does an adjustable pressure relief valve work?<\/h2><p class=\"wp-block-paragraph\"><strong>Adjustable pressure relief valves<\/strong>, as their name suggests, are mechanisms whose primary purpose is to relieve pressure (or perform what we call a bypass), but in a fully controlled way. In the case of a pressure and temperature relief valve, it will also take temperature into account.<\/p><p class=\"wp-block-paragraph\">This mechanism basically consists of a plug that keeps the discharge opening closed. It also has a carefully calibrated spring that holds this plug in the most suitable position to prevent the system contents from escaping.<\/p><p class=\"wp-block-paragraph\">When the internal pressure of the gas or fluid exceeds the pressure set on the spring, the plug opens to let the contents out through the discharge opening. This, of course, only happens while the internal pressure remains too high; once it drops sufficiently, the plug returns to its initial position and the system is once again completely sealed.<\/p><p class=\"wp-block-paragraph\">Since this is an<strong> adjustable pressure relief valve<\/strong>, the pressure threshold that marks the release point can be adjusted through the force exerted by the spring. This is usually done with a screw that passes through it and is tightened or loosened as required.<\/p><h2 class=\"wp-block-heading\" id=\"aplicaciones-de-una-valvula-de-alivio-de-presion-regulable\">Applications of an adjustable pressure relief valve<\/h2><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.webp\" alt=\"adjustable pressure relief valve\" class=\"wp-image-291\" width=\"800\" height=\"533\" loading=\"lazy\"\/><\/figure><p class=\"wp-block-paragraph\">As you have seen, Valfonta\u2019s <strong>adjustable pressure relief valves<\/strong> are designed to keep a system\u2019s pressure stable at all times. Also known as overpressure valves, they are effective mechanisms that always prevent any fluid from exceeding a preset limit. So, if you are looking for a trusted place to <a href=\"\/en\/pressure-relief-valve\/\"><strong>buy a pressure relief valve<\/strong><\/a>, you should know that Valfonta has long experience manufacturing and distributing them.<\/p><h3 class=\"wp-block-heading\" id=\"instalaciones-en-laboratorios-quimicos-plantas-sanitarias-de\">Installations in chemical laboratories, sanitary plants, distilleries, or even dry cleaners<\/h3><p class=\"wp-block-paragraph\">All these sites have systems that are prone to pressure problems. For these cases, it is therefore very advisable to have an <a href=\"\/en\/product\/excess-pressure-valve-model-prv55\/\"><strong>excess pressure valve<\/strong><\/a>, such as our PRV55 model. It is a model similar to the others, but regulation is performed by means of a diaphragm.<\/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-alivio-de-presion-regulable-2-300x300-1.webp\" alt=\"adjustable pressure relief valve\" class=\"wp-image-292\" width=\"300\" height=\"300\" loading=\"lazy\"\/><\/figure><h3 class=\"wp-block-heading\" id=\"plantas-de-vapor\">Steam plants<\/h3><p class=\"wp-block-paragraph\">For steam, a suitable option may be our S1 <strong>adjustable pressure relief valve<\/strong> model, as it offers a fast response.<\/p><h3 class=\"wp-block-heading\" id=\"sistemas-con-gases-y-liquidos-no-peligrosos\">Systems with non-hazardous gases and liquids<\/h3><p class=\"wp-block-paragraph\">These systems accept both pressure relief valves and excess pressure valves. That is why the S1, S2, and S3 models are all more than suitable for any system whose contents are not hazardous but where pressure must be controlled reliably. They are fast, efficient models, ideal for keeping the valve inlet at its set point.<\/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-alivio-de-presion-regulable-3-300x300-1.webp\" alt=\"adjustable pressure relief valve\" class=\"wp-image-293\" width=\"300\" height=\"300\" loading=\"lazy\"\/><\/figure><h3 class=\"wp-block-heading\" id=\"aire-comprimido\">Compressed air<\/h3><p class=\"wp-block-paragraph\">Compressed air systems always require an excess pressure valve, and you can install several of our models in them. Both the S1 and the PRV55 will be suitable and highly useful.<\/p><h2 class=\"wp-block-heading\" id=\"como-se-ajusta-el-tarado-en-la-practica\">How the set pressure is adjusted in practice<\/h2><p class=\"wp-block-paragraph\">Each model is supplied with a spring whose range covers the requested set pressure, and Valfonta delivers the valve already adjusted to that value. The spring should be chosen so that the set pressure falls within its range, not at the end of it. Some examples of the standard ranges:<\/p><ul class=\"wp-block-list\"><li><a href=\"\/en\/product\/pressure-excess-valve-prv53\/\">PRV53<\/a>: from 0.5 to 3, from 1 to 6, and from 3 to 10 barg.<\/li><li><a href=\"\/en\/product\/pressure-excess-valve-prv54\/\">PRV54<\/a>: from 0.5 to 4, from 3 to 8, and from 4 to 12 barg.<\/li><li><a href=\"\/en\/product\/pressure-relief-valve-s3\/\">S3<\/a> in DN15 and DN20: from 1 to 6, from 4 to 12, and from 8 to 16 barg (from 15 to 25, on request).<\/li><\/ul><p class=\"wp-block-paragraph\">Fine adjustment is done on site. On the S3, for example, you remove the cap and the O-ring and turn the adjusting stem: turning it clockwise compresses the spring and increases the set pressure. Always check the result with the inlet pressure gauge and review the set pressure periodically, as we explain in why you should audit the set pressure of relief valves.<\/p><h2 class=\"wp-block-heading\" id=\"compre-sus-valvulas-de-alivio-de-presion-regulables-en-valfo\">Buy your adjustable pressure relief valves from Valfonta<\/h2><p class=\"wp-block-paragraph\">As you have seen, <strong>adjustable pressure relief valves<\/strong> are designed to stabilize a system\u2019s pressure, so they can be considered a compensation method whose main aim is to minimize pressure variation.<\/p><p class=\"wp-block-paragraph\">With Valfonta valves you can prevent high pressures from causing problems ranging from noise or vibration to cracks and leaks. Using valves properly thus translates into greater safety and profitability for any system.<\/p><p class=\"wp-block-paragraph\">If you want to buy a pressure relief valve, you can contact us: just call <strong>933 72 08 88<\/strong> or send us an email at <strong><a href=\"mailto:valfonta@valfonta.com\">valfonta@valfonta.com.<\/a> <\/strong>. Our staff will be happy to assist you and help you get the valve your installation needs.<\/p><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=\"Steam pressure reducing valve\" class=\"wp-image-254\" width=\"332\" height=\"83\" loading=\"lazy\"\/><\/figure><\/div><aside class=\"wp-block-group vf-post-aside is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-post-sticky is-layout-flow wp-block-group-is-layout-flow\"><nav class=\"wp-block-group vf-post-toc vfa-aria-label--Article%20contents is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">In this article<\/p><ol class=\"wp-block-list\"><li><a href=\"#por-que-son-tan-importantes-las-valvulas-de-alivio-de-presio\">Why are adjustable pressure relief valves so important?<\/a><\/li><li><a href=\"#como-funciona-una-valvula-de-alivio-de-presion-regulable\">How does an adjustable pressure relief valve work?<\/a><\/li><li><a href=\"#aplicaciones-de-una-valvula-de-alivio-de-presion-regulable\">Applications of an adjustable pressure relief valve<\/a><\/li><li><a href=\"#como-se-ajusta-el-tarado-en-la-practica\">How the set pressure is adjusted in practice<\/a><\/li><li><a href=\"#compre-sus-valvulas-de-alivio-de-presion-regulables-en-valfo\">Buy your adjustable pressure relief valves from Valfonta<\/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 relief or excess pressure 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-relief-valve\/\">View pressure relief 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\/excess-pressure-valve-model-prv55\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV45-55-700x700-1.jpg\" alt=\"PRV55 excess pressure valve\" class=\"wp-image-191\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV55 excess pressure valve<\/b><span>With diaphragm: set pressure from 0.01 barg and steam up to 150 \u00b0C.<\/span><\/a><\/li><li><a href=\"\/en\/product\/pressure-excess-valve-prv53\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV30-44-700x700-1.jpg\" alt=\"PRV53 excess pressure valve\" class=\"wp-image-181\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV53 excess pressure valve<\/b><span>316L stainless piston, DN15\u201325; liquids, air, and inert gases.<\/span><\/a><\/li><li><a href=\"\/en\/product\/pressure-excess-valve-prv54\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV30-44-700x700-1.jpg\" alt=\"PRV54 excess pressure valve\" class=\"wp-image-181\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV54 excess pressure valve<\/b><span>316L stainless with bellows, DN15\u201325 and PN25; steam up to 210 \u00b0C.<\/span><\/a><\/li><\/ul><p class=\"vf-post-more wp-block-paragraph\"><a href=\"\/en\/pressure-relief-valve\/\">View all pressure relief 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-alivio-presion.png\" alt=\"\" class=\"wp-image-233\" 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 relief valves<\/small><b>What are the main features of a pneumatic pressure relief valve?<\/b><span>5 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/en\/blog\/pneumatic-pressure-relief-valve\/\" aria-label=\"Pressure relief valves What are the main features of a pneumatic pressure relief valve? 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-alivio-presion.png\" alt=\"\" class=\"wp-image-233\" 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 relief valves<\/small><b>Discover the Valfonta Model S3 hydraulic pressure relief valve<\/b><span>5 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/en\/blog\/hydraulic-pressure-relief-valve\/\" aria-label=\"Pressure relief valves Discover the Valfonta Model S3 hydraulic pressure relief valve 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\/alivio-de-presionpara-agua-gases-y-vapor1.jpg\" alt=\"\" class=\"wp-image-167\" 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 relief valves<\/small><b>Pressure relief valve for water, steam, and gases: definition and operation<\/b><span>10 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/en\/blog\/water-pressure-relief-valve\/\" aria-label=\"Pressure relief valves Pressure relief valve for water, steam, and gases: definition and operation 10 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\/715#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=\"1792706835.e0899c55b6a5bb0b\" \/>\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\" 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\/><\/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 adjustable pressure relief valve keeps the discharge closed with a plug and a calibrated spring, and opens when the pressure exceeds the value set on the spring, which is adjustable with a screw.<\/p>\n","protected":false},"author":1,"featured_media":249,"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":"Adjustable pressure relief valve | Valfonta","rank_math_description":"Valfonta adjustable pressure relief valve. Explore our extensive product catalog to choose the ideal one for your company.","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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Explore our extensive product catalog to choose the ideal one for your company.\",\"author\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"abstract\":\"An adjustable pressure relief valve keeps the discharge opening closed with a plug and a calibrated spring, and opens when the pressure exceeds the pressure set on the spring, which is adjustable with a screw. Valfonta supplies it already set, with a spring whose range covers the set pressure without sitting at the end of the range. For steam it recommends the S1, for its fast response, and for non-hazardous gases and liquids, the S1, S2, or S3. For laboratories, distilleries, dry cleaners, or compressed air it proposes the PRV55, regulated by a diaphragm.\"}]}]","footnotes":"","_vg_translation_of":"490","_vg_lang":"en","_vg_wpml_state":"{\"lang\":\"en\",\"trid\":\"676\",\"src\":\"es\"}"},"categories":[37],"tags":[],"class_list":["post-715","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-relief-and-safety"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/715","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=715"}],"version-history":[{"count":2,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/715\/revisions"}],"predecessor-version":[{"id":10195,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/715\/revisions\/10195"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media\/249"}],"wp:attachment":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media?parent=715"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/categories?post=715"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/tags?post=715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}