{"id":2227,"date":"2021-12-28T10:06:16","date_gmt":"2021-12-28T10:06:16","guid":{"rendered":"https:\/\/zecovalve.com\/operation-of-the-spirax-sarco-25p-pressure-reducing-valve-zeco-valve-blog.html"},"modified":"2022-08-08T13:57:05","modified_gmt":"2022-08-08T13:57:05","slug":"operation-of-the-spirax-sarco-25p-pressure-reducing-valve-zeco-valve-blog","status":"publish","type":"post","link":"https:\/\/zecovalve.com\/pt\/operation-of-the-spirax-sarco-25p-pressure-reducing-valve-zeco-valve-blog.html","title":{"rendered":"V\u00e1lvula redutora de press\u00e3o Spirax-Sarco 25P | V\u00e1lvula Zeco"},"content":{"rendered":"<p>Cougar USA \u00e9 o representante da Spirax Sarco na \u00e1rea de Houston. A Spirax Sarco fornece uma ampla gama de produtos de controle de fluidos, pacotes projetados, experi\u00eancia em sistemas de vapor e servi\u00e7os locais para sua diversificada gama de mais de 100.000 clientes industriais e institucionais. Eles ajudam seus clientes a otimizar a capacidade de produ\u00e7\u00e3o, reduzir custos de energia e emiss\u00f5es, melhorar a qualidade dos produtos e aumentar a seguran\u00e7a de suas opera\u00e7\u00f5es. A Spirax Sarco possui f\u00e1bricas estrategicamente localizadas em todo o mundo, incluindo uma perto de Houston, em Pasadena, Texas.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">O que \u00e9 um Spirax Sarco 25p?<\/h2>\n\n\n\n<p>Os reguladores Spirax Sarco S\u00e9rie 25 s\u00e3o uma fam\u00edlia vers\u00e1til de reguladores de press\u00e3o de a\u00e7\u00e3o autom\u00e1tica com pilotos de controle e v\u00e1lvulas principais intercambi\u00e1veis para a maioria das aplica\u00e7\u00f5es de vapor. As op\u00e7\u00f5es incluem redu\u00e7\u00e3o de press\u00e3o (25P), redu\u00e7\u00e3o de press\u00e3o combinada com cancelamento el\u00e9trico liga\/desliga (25PE), redu\u00e7\u00e3o de press\u00e3o com piloto carregado de ar (25PA) e como regulador de contrapress\u00e3o (25BP). Projetada pensando no usu\u00e1rio, a S\u00e9rie 25 oferece versatilidade e simplicidade. Molas intercambi\u00e1veis e codificadas por cores permitem uma mudan\u00e7a r\u00e1pida e f\u00e1cil da faixa de press\u00e3o a jusante, eliminando a necessidade de isolar a v\u00e1lvula ou interromper a linha de vapor.<\/p>\n\n\n\n<p>Spirax Sarco <a href=\"https:\/\/zecovalve.com\/pt\/water-pressure-reducing-valve-manufacturer-zeco-valve.html\/\" data-internallinksmanager029f6b8e52c=\"8\" title=\"V\u00e1lvula redutora de press\u00e3o\" target=\"_blank\" rel=\"noopener\">V\u00e1lvula redutora de press\u00e3o<\/a>, Operado por piloto, 3\/4 pol. Nominal, NPT, 250 psi, 450 graus F, Corpo em ferro fundido, Meio: Vapor<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Componentes do Spirax Sarco 25p<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Material da carro\u00e7aria<\/strong><strong><\/strong><\/td><td>Ferro fundido<\/td><\/tr><tr><td><strong>Estilo final<\/strong><strong><\/strong><\/td><td>TNP<\/td><\/tr><tr><td><strong>Fabricante<\/strong><strong><\/strong><\/td><td>Spirax-Sarco Inc.<\/td><\/tr><tr><td><strong>Fabricante #<\/strong><strong><\/strong><\/td><td>55223<\/td><\/tr><tr><td><strong>meios de comunica\u00e7\u00e3o<\/strong><strong><\/strong><\/td><td>VAPOR<\/td><\/tr><tr><td><strong>Tamanho nominal<\/strong><strong><\/strong><\/td><td>3\/4 pol.<\/td><\/tr><tr><td><strong>Press\u00e3o nominal<\/strong><strong><\/strong><\/td><td>250psi<\/td><\/tr><tr><td><strong>Classifica\u00e7\u00e3o de temperatura<\/strong><strong><\/strong><\/td><td>450 grausF<\/td><\/tr><tr><td><strong>Tipo<\/strong><strong><\/strong><\/td><td>Operado por Piloto<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-operation-of-the-spirax-sarco-25p-pressure-reducing-valve\">Funcionamento da V\u00e1lvula Redutora de Press\u00e3o Spirax-Sarco 25P<\/h2>\n\n\n\n<p>A v\u00e1lvula redutora operada por piloto Spirax-Sarco s\u00e9rie 25P \u00e9 amplamente utilizada em sistemas de vapor. O controle de press\u00e3o preciso e est\u00e1vel pode ser realizado independentemente de uma mudan\u00e7a na press\u00e3o do vapor a montante ou flutua\u00e7\u00e3o da carga a jusante.<\/p>\n\n\n\n<p>A v\u00e1lvula redutora operada por piloto Spirax-Sarco s\u00e9rie 25P \u00e9 \u00fanica, pois uma ou v\u00e1rias v\u00e1lvulas piloto podem ser instaladas ou trocadas na mesma v\u00e1lvula. Al\u00e9m de ser est\u00e1vel e reduzir a press\u00e3o, tamb\u00e9m pode controlar a temperatura, a press\u00e3o a montante ou o interruptor remoto.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><b>Opera\u00e7\u00e3o<\/b><\/h3>\n\n\n\n<p>As posi\u00e7\u00f5es normais antes da partida s\u00e3o com a v\u00e1lvula principal fechada e a v\u00e1lvula piloto mantida aberta pela for\u00e7a da mola ou press\u00e3o do ar.<\/p>\n\n\n\n<p>O vapor que entra passa pela v\u00e1lvula piloto para a c\u00e2mara do diafragma principal e tamb\u00e9m sai pelo orif\u00edcio de controle. \u00c0 medida que o fluxo atrav\u00e9s da v\u00e1lvula piloto excede o fluxo atrav\u00e9s do orif\u00edcio, a press\u00e3o de controle aumenta na c\u00e2mara do diafragma e abre a v\u00e1lvula principal. \u00c0 medida que o vapor flui atrav\u00e9s da v\u00e1lvula principal, o aumento na press\u00e3o a jusante retorna atrav\u00e9s da linha de detec\u00e7\u00e3o de press\u00e3o para a parte inferior do diafragma de press\u00e3o.&nbsp;<\/p>\n\n\n\n<p>Quando a for\u00e7a abaixo do diafragma equilibra a for\u00e7a de compress\u00e3o da mola acima dele, a v\u00e1lvula piloto estrangula. A press\u00e3o de controle mantida na c\u00e2mara do diafragma principal posiciona a v\u00e1lvula principal para fornecer vapor suficiente para a press\u00e3o de entrega desejada. O ajuste da mola ou da press\u00e3o do ar acima do diafragma de press\u00e3o altera o ponto de ajuste da press\u00e3o a jusante.&nbsp;<\/p>\n\n\n\n<p>Quando o vapor n\u00e3o \u00e9 mais necess\u00e1rio, a press\u00e3o da linha de detec\u00e7\u00e3o aumenta, fechando o piloto de press\u00e3o e a press\u00e3o de controle retorna atrav\u00e9s do orif\u00edcio de controle. Isso permite que a v\u00e1lvula principal mantenha a press\u00e3o reduzida desejada e pode fechar hermeticamente para um fechamento sem sa\u00edda.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vantagens do Spirax Sarco 25p<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>A combina\u00e7\u00e3o de pilotos permite diferentes tipos de controle em um regulador<\/li><li>Guia de auto-lavagem patenteado para um servi\u00e7o longo e sem problemas<\/li><li>Diafragma testado contra fadiga, projetado sem pist\u00e3o para evitar o perigo de emperramento<\/li><li>Internos em a\u00e7o inoxid\u00e1vel para excelente durabilidade e resist\u00eancia \u00e0 corros\u00e3o<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><b><strong>Instala\u00e7\u00e3o t\u00edpica de<\/strong><\/b> Spirax Sarco 25p<\/h2>\n\n\n\n<p>O regulador deve ser instalado em linha horizontal com v\u00e1lvulas de bypass e de isolamento adequadas. Um purgador de vapor deve ser instalado a montante para evitar que o condensado chegue ao regulador. O purgador e o regulador devem ser protegidos com um filtro. A linha de detec\u00e7\u00e3o de press\u00e3o deve estar localizada em uma se\u00e7\u00e3o reta da tubula\u00e7\u00e3o a jusante, a pelo menos 10 di\u00e2metros de tubo da conex\u00e3o mais pr\u00f3xima. Instru\u00e7\u00f5es completas de instala\u00e7\u00e3o s\u00e3o fornecidas em IMI3.000<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Manuten\u00e7\u00e3o do Spirax Sarco 25p<\/h2>\n\n\n\n<p>As instru\u00e7\u00f5es completas de instala\u00e7\u00e3o e manuten\u00e7\u00e3o s\u00e3o fornecidas no IMI 3.000, cuja c\u00f3pia \u00e9 fornecida com cada regulador. As pe\u00e7as sobressalentes dispon\u00edveis s\u00e3o mostradas no TIS 3.027 e 3.0271.<\/p>\n\n\n\n<!-- Andy:h-related-tags -->\n<h2 id=\"h-related-tags\">Etiquetas relacionadas :<\/h2>\n<!-- \/Andy:h-related-tags -->\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/\">V\u00e1lvula ZECO<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/difference-between-gate-valves-and-ball-valves.html\/\">V\u00e1lvula de gaveta vs V\u00e1lvula de esfera<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/advantages-and-disadvantages-of-globe-valves.html\/\">O que \u00e9 uma v\u00e1lvula de globo?<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/gate-valve-problems.html\/\">Reparo de v\u00e1lvula gaveta<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/what-is-an-axial-flow-silent-check-valve.html\/\">O que \u00e9 uma v\u00e1lvula de reten\u00e7\u00e3o axial<\/a>\n\n<\/div>\n\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/produto\/manual-gate-valve\/\">V\u00e1lvula de gaveta de acionamento manual Fabricante<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/the-function-of-globe-valve-in-pipeline-system.html\/\">O que s\u00e3o v\u00e1lvulas globo?<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/difference-between-gate-valve-and-butterfly-valve.html\/\">Diferen\u00e7a entre a v\u00e1lvula de gaveta e a v\u00e1lvula de borboleta<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/china-gate-valves-suppliersnon-rising-stem-gate-valvesks-gate-valves.html\/\">O que \u00e9 uma v\u00e1lvula de gaveta?<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/tag\/shanghai-pressure-reducing-valve-factory\/\">F\u00e1brica de v\u00e1lvulas redutoras de press\u00e3o de Xangai<\/a>\n\n<\/div>\n\n\n\n<p>Dez artigos antes e depois<\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/negative-rate-belleville-disc-spring-for-pressure-sensing-zeco-valve-blog.html\/\">Mola disco Belleville de taxa negativa para detec\u00e7\u00e3o de press\u00e3o | Blog da V\u00e1lvula Zeco<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/guided-wave-radar-level-sensing-zeco-valve-blog.html\/\">Sensor de N\u00edvel por Radar de Onda Guiada | Blog da V\u00e1lvula Zeco<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/the-operation-of-bimetallic-steam-traps-zeco-valve-blog.html\/\">A opera\u00e7\u00e3o de purgadores bimet\u00e1licos | Blog da V\u00e1lvula Zeco<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/selecting-a-stainless-steel-globe-or-gate-valve-zeco-valve-blog.html\/\">Selecionando uma v\u00e1lvula globo ou gaveta de a\u00e7o inoxid\u00e1vel | Blog da V\u00e1lvula Zeco<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/high-performance-butterfly-valves-for-on-off-and-throttling-service-zeco-valve-blog.html\/\">V\u00e1lvulas Borboleta de Alto Desempenho para Servi\u00e7os Liga\/Desliga e Estrangulamento | Blog da V\u00e1lvula Zeco<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/pressure-and-temperature-switches-glossary-important-terms-to-know-part-1-zeco-valve-blog.html\/\">Gloss\u00e1rio de interruptores de press\u00e3o e temperatura \u2013 Termos importantes para saber Parte 1 | Blog da V\u00e1lvula Zeco<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/pressure-and-temperature-switches-glossary-important-terms-to-know-part-2-zeco-valve-blog.html\/\">Gloss\u00e1rio de interruptores de press\u00e3o e temperatura \u2013 Termos importantes para saber Parte 2 | Blog da V\u00e1lvula Zeco<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/the-sliding-gate-control-valve-zeco-valve-blog.html\/\">A v\u00e1lvula de controle de porta deslizante | Blog da V\u00e1lvula Zeco<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/happy-holidays-and-happy-new-year-from-zeco-valve-zeco-valve-blog.html\/\">Boas Festas e Feliz Ano Novo da Zeco Valve | Blog da V\u00e1lvula Zeco<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/heat-exchangers-for-liquid-gas-vaporization-zeco-valve-blog.html\/\">Trocadores de calor para vaporiza\u00e7\u00e3o l\u00edquido-g\u00e1s | Blog da V\u00e1lvula Zeco<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Cougar USA \u00e9 o representante da Spirax Sarco na \u00e1rea de Houston. A Spirax Sarco fornece uma ampla gama de produtos para controle de fluidos, pacotes projetados,\u2026 <a title=\"V\u00e1lvula redutora de press\u00e3o Spirax-Sarco 25P | V\u00e1lvula Zeco\" class=\"read-more\" href=\"https:\/\/zecovalve.com\/pt\/operation-of-the-spirax-sarco-25p-pressure-reducing-valve-zeco-valve-blog.html\" aria-label=\"Mais em V\u00e1lvula Redutora de Press\u00e3o Spirax-Sarco 25P | V\u00e1lvula Zeco\">Ler mais<\/a><\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","kt_blocks_editor_width":"","footnotes":""},"categories":[2368],"tags":[2651,2369,2370,2372,2373,2371],"class_list":["post-2227","post","type-post","status-publish","format-standard","hentry","category-control-valve","tag-shanghai-pressure-reducing-valve-factory","tag-spirax-sarco-25p","tag-spirax-sarco-25p-pressure-reducing-valve","tag-spirax-sarco-pressure-reducing-valve","tag-spirax-sarco-prv","tag-spirax-sarco-valves","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"featured_image_src_large":false,"author_info":{"display_name":"Jerry","author_link":"https:\/\/zecovalve.com\/pt\/author\/jerry"},"comment_info":0,"category_info":[{"term_id":2368,"name":"Control Valve","slug":"control-valve","term_group":0,"term_taxonomy_id":2368,"taxonomy":"category","description":"","parent":0,"count":12,"filter":"raw","cat_ID":2368,"category_count":12,"category_description":"","cat_name":"Control Valve","category_nicename":"control-valve","category_parent":0}],"tag_info":[{"term_id":2651,"name":"Shanghai Pressure Reducing Valve Factory","slug":"shanghai-pressure-reducing-valve-factory","term_group":0,"term_taxonomy_id":2651,"taxonomy":"post_tag","description":"<!-- wp:heading -->\r\n<h2 id=\"h-what-is-a-pressure-reducing-valve\">What is a Pressure Reducing Valve?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA Pressure Reducing Valve is a self-operating valve used to control excess pressure to give a constant reduced pressure to a system. The pressure reduction regulator is another name for this valve. The primary function of pressure-reducing valves is to convert increased incoming pressure into lower outgoing pressure. They are widely utilized in the water, steam, and oil and gas sectors. So, Pressure Reducing Valve manufacturers define the valve as a self-acting automated control valve that reduces a greater uncontrolled intake pressure to a constant, lowered output pressure independent of upstream water pressure variations. We will learn about the working, different types, uses, and benefits of pressure-reducing valves in this article.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>How does a Pressure Reducing Valve work?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nWhen it does this under both flow and no-flow conditions, the type of control is known as \u2018drop tight\u2019. ZECO pressure reducing valves use a balanced spring and diaphragm to control the downstream pressure. This \u2018drop tight\u2019 feature is one of the most important criteria for any pressure reducing valves, as this stops the pressure from \u2018creeping\u2019 \u2013 a term which is used when an increase in the downstream pressure occurs under no flow conditions. A valve which will allow this \u2018creep\u2019 cannot be known as \u2018drop tight\u2019 or in fact a true pressure reducing valve, as it will eventually allow the pressure to creep up to equal the upstream pressure, which can cause significant problems and essentially negates the point of using a pressure reducing valve in the first place.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe diaphragm effectively separates all of the water contact parts and the pressure from the water supply away from the control spring and associated mechanism. The body is then protected from debris by the use of a stainless-steel strainer.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nUnder no flow conditions the downstream pressure puts back-pressure on the seat and diaphragm of the valve, which in turn overcomes the spring pressure. This means the seat moves up, forcing it to seal against the diaphragm, therefore not allowing the downstream pressure to increase.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nUnder flow conditions the back pressure against the seat is reduced thus allowing the seat to open and water to flow through the valve.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Advantages of Pressure Reducing Valves<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li>Direct acting pressure reducing valve is suitable for general liquids and gases.<\/li>\r\n \t<li>WRAS &amp; ACS Certifications for Drinking Water and Beverage application.<\/li>\r\n \t<li>Suitable for process automation control and many general purpose applications.<\/li>\r\n \t<li>Convenient in-style mounts either horizontally or vertically.<\/li>\r\n \t<li>Wide range capacity to handle local water supply pressure and adjust to specific pump specifications.<\/li>\r\n \t<li>Adjusting nut allows easy calibrated pressure adjustment.<\/li>\r\n \t<li>Stainless Steel 316 lower body and upper body construction for durability and compatibility.<\/li>\r\n \t<li>The balanced piston design provides a constant outlet pressure even when the inlet pressure is unstable. The supplied pressure gauge indicates the outlet pressure.<\/li>\r\n \t<li>Easy maintenance, maintenance kits are available upon request.<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nZECO Valve is the most professional Shanghai Pressure Reducing Valve Factory since 1991. If any inquiry, please contact ZECO.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":4,"filter":"raw"},{"term_id":2369,"name":"spirax sarco 25p","slug":"spirax-sarco-25p","term_group":0,"term_taxonomy_id":2369,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":2370,"name":"spirax sarco 25p pressure reducing valve","slug":"spirax-sarco-25p-pressure-reducing-valve","term_group":0,"term_taxonomy_id":2370,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":2372,"name":"spirax sarco pressure reducing valve","slug":"spirax-sarco-pressure-reducing-valve","term_group":0,"term_taxonomy_id":2372,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":2373,"name":"Spirax Sarco PRV","slug":"spirax-sarco-prv","term_group":0,"term_taxonomy_id":2373,"taxonomy":"post_tag","description":"<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_1cedd7-56\"} \/-->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-what-is-spirax-sarco-houston\">What is Spirax Sarco Houston?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nCougar USA is the Spirax Sarco rep in the Houston area. Spirax Sarco provides a broad range of fluid-control products, engineered packages, steam systems expertise, and site services for its diverse range of over 100,000 industrial and institutional customers. They help their customers optimize production capacity, reduce energy costs and emissions, improve product quality and enhance the safety of their operations. Spirax Sarco has strategically located manufacturing plants around the world including one near Houston in Pasadena, Texas.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>What is Spirax Sarco PRV?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nWell-designed steam systems produce clean, dry steam for delivery at high pressure \u2014 the best-quality steam at the lowest cost. Lower-pressure steam is usually needed at the point of use. Effective control demands an automatic valve that can reduce steam pressure accurately, reliably, and at a cost to suit the application. Like direct-acting pressure-reducing valves, these valves are self-powered. The pilot operation provides accurate control under large load-change conditions. Available in iron, cast steel, and stainless steel in sizes from 1\/2\u2033 to 8\u2033.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:generateblocks\/button-container {\"uniqueId\":\"6d8495a3\",\"isDynamic\":true,\"blockVersion\":2} -->\r\n<!-- wp:generateblocks\/button {\"uniqueId\":\"3d442e11\",\"hasUrl\":true,\"target\":true,\"backgroundColor\":\"#0366d6\",\"textColor\":\"#ffffff\",\"backgroundColorHover\":\"#222222\",\"textColorHover\":\"#ffffff\",\"paddingTop\":\"15\",\"paddingRight\":\"20\",\"paddingBottom\":\"15\",\"paddingLeft\":\"20\"} -->\r\n<a class=\"gb-button gb-button-3d442e11 gb-button-text\" href=\"mailto:commercial@zecovalve.com\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>GET SPIRAX SARCO PRV PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:heading -->\r\n<h2>How does the 25P Pilot Regulator Works?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe Spirax Sarco pilot-operated pressure regulator works by balancing the downstream pressure against a control spring. This modulates a small valve head over a seat (the pilot). The flow through this seat is directed, in turn, to the main valve diaphragm, where it\r\nmodulates the main valve.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nIn order to achieve the most stable operating condition, an external pressure sensing line must be used. This allows downstream pressure to feedback to the underside of the pilot diaphragm, balancing the spring force, and causing the pilot valve to throttle. This settles the pilot valve, allowing a constant flow across the main diaphragm. This ensures that the main valve is also settled to give a stable downstream pressure.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nWhen downstream pressure rises, the pilot valve closes, and pressure is released from the main valve diaphragm through the control orifice, to close the main valve. Any variations in load or pressure will immediately be sensed on the pilot diaphragm, which will act to adjust the position of the main valve, ensuring a constant downstream pressure.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>How do Direct Operated Regulators work?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nOn start-up, upstream pressure, aided by a return spring, holds the valve head against the seat in the closed position.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nDownstream pressure is set by rotating the hand wheel in a clockwise direction which compresses the control spring and extends the bellows. This downward movement is transmitted via a push rod, which causes the main valve to open.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe steam then passes through the open valve into the downstream pipework and also surrounds the bellows.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nAs downstream pressure increases, it acts through the bellows to counteract the spring force and closes the main valve when the set pressure is reached. The main valve modulates to give constant pressure.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":4,"filter":"raw"},{"term_id":2371,"name":"spirax sarco valves","slug":"spirax-sarco-valves","term_group":0,"term_taxonomy_id":2371,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"}],"taxonomy_info":{"category":[{"value":2368,"label":"Control Valve"}],"post_tag":[{"value":2651,"label":"Shanghai Pressure Reducing Valve Factory"},{"value":2369,"label":"spirax sarco 25p"},{"value":2370,"label":"spirax sarco 25p pressure reducing valve"},{"value":2372,"label":"spirax sarco pressure reducing valve"},{"value":2373,"label":"Spirax Sarco PRV"},{"value":2371,"label":"spirax sarco valves"}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Spirax-Sarco 25P Pressure Reducing Valve - Zeco Valve<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zecovalve.com\/pt\/operation-of-the-spirax-sarco-25p-pressure-reducing-valve-zeco-valve-blog.html\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spirax-Sarco 25P Pressure Reducing Valve - Zeco Valve\" \/>\n<meta property=\"og:description\" content=\"Cougar USA is the Spirax Sarco rep in the Houston area. Spirax Sarco provides a broad range of fluid-control products, engineered packages, ... 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