{"id":13890,"date":"2025-10-18T18:28:25","date_gmt":"2025-10-18T10:28:25","guid":{"rendered":"https:\/\/www.xintaivalves.com\/?p=13890"},"modified":"2025-10-29T15:22:02","modified_gmt":"2025-10-29T07:22:02","slug":"psi-vs-psia-psig","status":"publish","type":"post","link":"https:\/\/www.xintaivalves.com\/pt\/blog\/psi-vs-psia-psig\/","title":{"rendered":"PSI vs PSIA vs PSIG: Qual \u00e9 a diferen\u00e7a nas unidades de press\u00e3o?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u00cdndice<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar \u00edndice de conte\u00fado\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Alternar<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.xintaivalves.com\/pt\/blog\/psi-vs-psia-psig\/#PSI_vs_PSIA_vs_PSIG_Whats_the_Difference_in_Pressure_Units\" >PSI vs PSIA vs PSIG: Qual \u00e9 a diferen\u00e7a nas unidades de press\u00e3o?<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.xintaivalves.com\/pt\/blog\/psi-vs-psia-psig\/#PSI_Meaning\" >Significado de PSI<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.xintaivalves.com\/pt\/blog\/psi-vs-psia-psig\/#PSI_vs_PSIA\" >PSI vs PSIA<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.xintaivalves.com\/pt\/blog\/psi-vs-psia-psig\/#PSI_vs_PSIG\" >PSI vs PSIG<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.xintaivalves.com\/pt\/blog\/psi-vs-psia-psig\/#How_to_use_these_units_with_valves\" >Como usar essas unidades com v\u00e1lvulas?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.xintaivalves.com\/pt\/blog\/psi-vs-psia-psig\/#Conclusion\" >Conclus\u00e3o<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"724\" src=\"https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2025\/10\/image-78-1024x724.png\" alt=\"\" class=\"wp-image-13891\" srcset=\"https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2025\/10\/image-78-1024x724.png 1024w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2025\/10\/image-78-300x212.png 300w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2025\/10\/image-78-768x543.png 768w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2025\/10\/image-78-1536x1086.png 1536w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2025\/10\/image-78-18x12.png 18w, https:\/\/www.xintaivalves.com\/wp-content\/uploads\/2025\/10\/image-78.png 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PSI_vs_PSIA_vs_PSIG_Whats_the_Difference_in_Pressure_Units\"><\/span>PSI vs PSIA vs PSIG: Qual \u00e9 a diferen\u00e7a nas unidades de press\u00e3o?<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Compreender as medi\u00e7\u00f5es de press\u00e3o \u00e9 essencial para manter tudo seguro e funcionando corretamente, especialmente na escolha e aplica\u00e7\u00e3o de v\u00e1lvulas em sistemas de controle de fluidos. Os termos PSI, PSIA e PSIG s\u00e3o usados principalmente para medir a press\u00e3o com precis\u00e3o, mas seus significados e fun\u00e7\u00f5es s\u00e3o diferentes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PSI (libras por polegada quadrada) \u00e9 uma unidade comum para press\u00e3o.<sup><\/sup> Entretanto, PSIA (libras por polegada quadrada absoluta) e PSIG (libras por polegada quadrada manom\u00e9trica) est\u00e3o entre as duas varia\u00e7\u00f5es de PSI.<sup><\/sup> PSIG e PSIA oferecem mais informa\u00e7\u00f5es sobre a condi\u00e7\u00e3o de refer\u00eancia para a medi\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Este blog explica as defini\u00e7\u00f5es e diferen\u00e7as entre essas medidas de press\u00e3o, usando PSI como principal ponto de refer\u00eancia para lhe proporcionar uma compreens\u00e3o clara desses conceitos-chave.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PSI_Meaning\"><\/span>Significado de PSI<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PSI (libras por polegada quadrada) \u00e9 uma unidade que mede a press\u00e3o, determinando a for\u00e7a exercida sobre uma \u00e1rea de uma polegada quadrada.<sup><\/sup> \u00c9 comumente utilizado em diversas aplica\u00e7\u00f5es, incluindo press\u00e3o de pneus, armazenamento e distribui\u00e7\u00e3o de combust\u00edvel, al\u00e9m de atividades de teste e medi\u00e7\u00e3o., <a target=\"_blank\" rel=\"noreferrer noopener\" href=\"https:\/\/www.xintaivalves.com\/pt\/blog\/wastewater-treatment-methods\/\">gest\u00e3o de \u00e1guas residuais<\/a>, e at\u00e9 mesmo a nossa press\u00e3o atmosf\u00e9rica. No entanto, sem uma refer\u00eancia, pode n\u00e3o ser claro, pois a press\u00e3o pode ser medida com base em v\u00e1rios par\u00e2metros.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PSI_vs_PSIA\"><\/span>PSI vs PSIA<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Embora PSI seja a unidade geral de press\u00e3o, pode ser amb\u00edguo, pois n\u00e3o especifica o ponto de refer\u00eancia para a medi\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Uma de suas varia\u00e7\u00f5es, PSIA (libras por polegada quadrada absoluta), mede a press\u00e3o em rela\u00e7\u00e3o a um v\u00e1cuo perfeito.<sup><\/sup> Em resumo, o c\u00e1lculo inclui a press\u00e3o atmosf\u00e9rica. A press\u00e3o dentro de um recipiente sem mol\u00e9culas de ar \u00e9 de 0 PSIA, enquanto a press\u00e3o atmosf\u00e9rica ao n\u00edvel do mar seria em torno de 14,7 PSIA. A press\u00e3o barom\u00e9trica \u00e9 medida em esta\u00e7\u00f5es meteorol\u00f3gicas e boias de dados usando PSIA. As informa\u00e7\u00f5es coletadas por esses sensores ajudam os meteorologistas a monitorar e prever o tempo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PSI_vs_PSIG\"><\/span>PSI vs PSIG<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PSI e PSIG s\u00e3o relacionados, mas n\u00e3o exatamente a mesma coisa. PSIG (libras por polegada quadrada manom\u00e9trica) mede a press\u00e3o em rela\u00e7\u00e3o \u00e0 press\u00e3o atmosf\u00e9rica circundante.<sup><\/sup> Ao n\u00edvel do mar, uma embarca\u00e7\u00e3o sem mol\u00e9culas de ar registraria uma leitura de aproximadamente -14,7 PSIG, enquanto a press\u00e3o atmosf\u00e9rica circundante \u00e9 sempre considerada 0 PSIG, independentemente do valor da press\u00e3o barom\u00e9trica.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Portanto, PSI \u00e9 um termo gen\u00e9rico, enquanto PSIG \u00e9 mais espec\u00edfico e comumente usado em aplica\u00e7\u00f5es cotidianas, como a press\u00e3o dos pneus, onde o interesse reside na press\u00e3o acima da press\u00e3o atmosf\u00e9rica. N\u00e3o s\u00e3o intercambi\u00e1veis, mas est\u00e3o intimamente relacionados.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_use_these_units_with_valves\"><\/span>Como usar essas unidades com v\u00e1lvulas?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ao escolher e aplicar <a target=\"_blank\" rel=\"noreferrer noopener\" href=\"https:\/\/www.xintaivalves.com\/pt\/product\/\">v\u00e1lvulas<\/a>, Conhecer essas unidades de press\u00e3o \u00e9 importante para manter tudo seguro e funcionando corretamente:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Utilize o PSIA ao lidar com condi\u00e7\u00f5es de press\u00e3o absoluta, como em sistemas de v\u00e1cuo ou medi\u00e7\u00f5es cient\u00edficas que exigem uma linha de base precisa.<\/li>\n\n\n\n<li>Use PSIG para a maioria dos casos. <a href=\"https:\/\/www.xintaivalves.com\/pt\/blog\/different-industries-rely-on-valves\/\" target=\"_blank\" rel=\"noreferrer noopener\">aplica\u00e7\u00f5es de v\u00e1lvulas industriais<\/a> como <a href=\"https:\/\/www.xintaivalves.com\/pt\/products\/pneumatic-actuator-butterfly-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">pneum\u00e1tica<\/a>, Sistemas hidr\u00e1ulicos e ar comprimido, onde a press\u00e3o manom\u00e9trica em rela\u00e7\u00e3o \u00e0 press\u00e3o atmosf\u00e9rica \u00e9 mais aplic\u00e1vel.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Independentemente disso, sempre confirme se <a target=\"_blank\" rel=\"noreferrer noopener\" href=\"https:\/\/www.xintaivalves.com\/pt\/blog\/understanding-valve-standards-and-specifications\/\">especifica\u00e7\u00f5es da v\u00e1lvula<\/a> As press\u00f5es do sistema referem-se a PSIA ou PSIG para garantir a compatibilidade e evitar aplica\u00e7\u00f5es incorretas.<\/p>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  <title>Destaque do produto Hero<\/title>\n  <style>\n    .hero-card {\n      display: flex;\n      flex-wrap: wrap;\n      align-items: center;\n      background: #f7f8fa;\n      border-radius: 16px;\n      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);\n      padding: 24px;\n      max-width: 900px;\n      margin: 40px auto;\n      font-family: Arial, sans-serif;\n      text-decoration: none;\n      color: inherit;\n      font-family: 'Poppins';\n    }\n\n    .hero-image {\n      width: 220px;\n      height: auto;\n      border-radius: 12px;\n      object-fit: cover;\n      flex-shrink: 0;\n    }\n\n    .hero-content {\n      padding-left: 24px;\n      flex: 1;\n      min-width: 260px;\n    }\n\n    .hero-title {\n      font-size: 1.6rem;\n      font-weight: bold;\n      margin-bottom: 12px;\n      color: #222;\n      font-family: 'Poppins';\n    }\n\n    .hero-description {\n      font-size: 1rem;\n      color: #555;\n      margin-bottom: 18px;\n    }\n\n    .hero-link {\n      display: inline-block;\n      padding: 10px 20px;\n      background-color: #D70C19;\n      color: #fff;\n      text-decoration: none;\n      border-radius: 8px;\n      font-weight: bold;\n      transition: background 0.2s ease-in-out;\n    }\n\n    .hero-link:hover {\n      background-color: #D70C19;\n    }\n\n    @media (max-width: 640px) {\n      .hero-card {\n        flex-direction: column;\n        text-align: center;\n      }\n\n      .hero-content {\n        padding-left: 0;\n        padding-top: 20px;\n      }\n\n      .hero-image {\n        width: 100%;\n        max-width: 280px;\n      }\n    }\n  <\/style>\n<\/head>\n<body>\n\n<a class=\"hero-card\" href=\"https:\/\/www.xintaivalves.com\/pt\/products\/spring-load-safety-valve\/\" target=\"_blank\">\n  <img decoding=\"async\" class=\"hero-image\" src=\"https:\/\/dbfhaf64fpo53.cloudfront.net\/wp-content\/uploads\/2022\/02\/%E6%9C%AA%E6%A0%87%E9%A2%98-3-4.jpg\" alt=\"V\u00e1lvula de seguran\u00e7a de carga de mola\">\n  <div class=\"hero-content\">\n    <div class=\"hero-title\">\ud83d\udee0 V\u00e1lvula de seguran\u00e7a com mola<\/div>\n    <div class=\"hero-description\">Projetada para prote\u00e7\u00e3o de seguran\u00e7a cr\u00edtica, esta v\u00e1lvula atua automaticamente quando a press\u00e3o do sistema excede os limites definidos, garantindo a integridade do equipamento e a seguran\u00e7a operacional.<\/div>\n    <span class=\"hero-link\">Explorar produto<\/span>\n  <\/div>\n<\/a>\n\n<\/body>\n<\/html>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclus\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Conhecer as diferen\u00e7as entre PSI, PSIA e PSIG melhora a precis\u00e3o da medi\u00e7\u00e3o da press\u00e3o.<sup><\/sup> Em particular, esse conhecimento \u00e9 essencial ao trabalhar com v\u00e1lvulas para garantir uma sele\u00e7\u00e3o precisa., <a target=\"_blank\" rel=\"noreferrer noopener\" href=\"https:\/\/www.xintaivalves.com\/pt\/blog\/when-should-safety-valve-be-used\/\">seguran\u00e7a<\/a>, e desempenho eficiente. Ao entender a diferen\u00e7a entre PSIA e PSI, e como PSIG e PSI se diferenciam, voc\u00ea pode aplicar com confian\u00e7a as unidades de press\u00e3o corretas para seus projetos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"noreferrer noopener\" href=\"https:\/\/www.xintaivalves.com\/pt\/blog\/how-xintai-valve-supports-large-scale-epc-projects-globally\/\">V\u00e1lvulas Xintai<\/a> A Xintai apoia essa estrat\u00e9gia fornecendo solu\u00e7\u00f5es de v\u00e1lvulas de alta qualidade e rigorosamente testadas, projetadas para atender aos mais exigentes requisitos de press\u00e3o e seguran\u00e7a. Com instala\u00e7\u00f5es de fabrica\u00e7\u00e3o e teste de excel\u00eancia, al\u00e9m de certifica\u00e7\u00f5es globais, a Xintai garante o correto desempenho de suas v\u00e1lvulas e contribui para o controle confi\u00e1vel de fluidos em diversas aplica\u00e7\u00f5es.<\/p>","protected":false},"excerpt":{"rendered":"<p>PSI vs PSIA vs PSIG: What\u2019s the Difference in Pressure Units? Understanding pressure measurements is essential in keeping everything safe and working properly, especially when choosing and applying valves for fluid control systems. The terms PSI, PSIA, and PSIG are mainly used to accurately read pressure, yet they mean and work differently from each other. [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":13891,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-13890","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.xintaivalves.com\/pt\/wp-json\/wp\/v2\/posts\/13890","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xintaivalves.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xintaivalves.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/pt\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/pt\/wp-json\/wp\/v2\/comments?post=13890"}],"version-history":[{"count":3,"href":"https:\/\/www.xintaivalves.com\/pt\/wp-json\/wp\/v2\/posts\/13890\/revisions"}],"predecessor-version":[{"id":13938,"href":"https:\/\/www.xintaivalves.com\/pt\/wp-json\/wp\/v2\/posts\/13890\/revisions\/13938"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xintaivalves.com\/pt\/wp-json\/wp\/v2\/media\/13891"}],"wp:attachment":[{"href":"https:\/\/www.xintaivalves.com\/pt\/wp-json\/wp\/v2\/media?parent=13890"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xintaivalves.com\/pt\/wp-json\/wp\/v2\/categories?post=13890"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xintaivalves.com\/pt\/wp-json\/wp\/v2\/tags?post=13890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}