{"id":56928,"date":"2026-09-23T23:43:15","date_gmt":"2026-09-23T23:43:15","guid":{"rendered":"https:\/\/zobai.com\/?p=56928"},"modified":"2026-09-24T02:01:01","modified_gmt":"2026-09-24T02:01:01","slug":"inbreathing-vs-outbreathing-capacity-for-tank-vents","status":"publish","type":"post","link":"https:\/\/zobai.com\/zh\/blog\/inbreathing-vs-outbreathing-capacity-for-tank-vents\/","title":{"rendered":"Inbreathing vs Outbreathing Capacity for Tank Vents"},"content":{"rendered":"<style> .zobai-tank-vent-article { max-width: 100%; overflow-wrap: anywhere; } .zobai-tank-vent-article .zobai-table-scroll { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 1.25rem 0; } .zobai-tank-vent-article .zobai-table-scroll table { width: 100%; min-width: 680px; border-collapse: collapse; } .zobai-tank-vent-article .zobai-table-scroll th, .zobai-tank-vent-article .zobai-table-scroll td { padding: 0.75rem; border: 1px solid currentColor; vertical-align: top; text-align: left; } .zobai-tank-vent-article .zobai-scope-note, .zobai-tank-vent-article .zobai-key-question, .zobai-tank-vent-article .zobai-cta { margin: 1.5rem 0; padding: 1rem 1.125rem; border: 1px solid currentColor; } .zobai-tank-vent-article .zobai-key-question { border-left-width: 3px; } .zobai-tank-vent-article .zobai-scope-note p:last-child, .zobai-tank-vent-article .zobai-key-question p:last-child, .zobai-tank-vent-article .zobai-cta p:last-child { margin-bottom: 0; } @media (max-width: 390px) { .zobai-tank-vent-article .zobai-table-scroll { margin-left: 0; margin-right: 0; } .zobai-tank-vent-article .zobai-table-scroll th, .zobai-tank-vent-article .zobai-table-scroll td { padding: 0.625rem; } } <\/style>\n<article class=\"zobai-tank-vent-article\">\n<p> Inbreathing and outbreathing are two separate tank-vent capacity duties. <strong>Inbreathing is inward flow used to address a vacuum-side condition; outbreathing is outward flow used to address a pressure-side condition.<\/strong> For vent capacity review, each required duty should be established independently and checked against the corresponding manufacturer performance data. <\/p>\n<p> That distinction matters even when one pressure\/vacuum vent performs both functions. A single physical vent does not turn the tank&#8217;s inward and outward flow requirements into one interchangeable capacity number. <\/p>\n<aside class=\"zobai-scope-note\" aria-label=\"Article scope\">\n<p> <strong>\u8303\u56f4\uff1a<\/strong> This guide focuses on normal operating and thermal venting. It does not replace a separate emergency-venting assessment where an emergency case applies. <\/p>\n<\/aside>\n<section>\n<h2>Inbreathing vs Outbreathing: What Changes in the Capacity Requirement?<\/h2>\n<p>\n  The practical difference is the direction of the required flow and the tank<br \/>\n  condition being controlled.\n<\/p>\n<div\n  class=\"zobai-table-scroll\"\n  role=\"region\"\n  aria-label=\"Comparison of inbreathing and outbreathing capacity duties\"\n  tabindex=\"0\"\n><\/p>\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Capacity question<\/th>\n<th scope=\"col\">\u5438\u5165<\/th>\n<th scope=\"col\">\u547c\u6c14<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Flow direction<\/td>\n<td>Into the tank<\/td>\n<td>Out of the tank<\/td>\n<\/tr>\n<tr>\n<td>Tank tendency<\/td>\n<td>Falling internal pressure<\/td>\n<td>Rising internal pressure<\/td>\n<\/tr>\n<tr>\n<td>Vent function to verify<\/td>\n<td>Vacuum side<\/td>\n<td>Pressure side<\/td>\n<\/tr>\n<tr>\n<td>Project requirement<\/td>\n<td>Required inward flow<\/td>\n<td>Required outward flow<\/td>\n<\/tr>\n<tr>\n<td>Candidate evidence<\/td>\n<td>Vacuum-side capacity data<\/td>\n<td>Pressure-side capacity data<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\n  A combined pressure\/vacuum vent may provide both functions, but its two sides<br \/>\n  still need to be checked against different project duties. Industry application<br \/>\n  worksheets reflect this separation: they ask for total inbreathing and total<br \/>\n  outbreathing requirements independently rather than requesting one generic<br \/>\n  vent-capacity value.<br \/>\n  <a href=\"https:\/\/protectoseal.com\/PDF_VENTS\/MISCELLANEOUS\/Breather-Vent-Worksheet.pdf\" target=\"_blank\" rel=\"noopener\"><br \/>\n    Protectoseal&#8217;s conservation breather vent worksheet<br \/>\n  <\/a><br \/>\n  is one example of this engineering practice.\n<\/p>\n<p>\n  This also separates <strong>required capacity<\/strong> from<br \/>\n  <strong>published or rated capacity<\/strong>. Required capacity originates with<br \/>\n  the tank and its operating cases. Published capacity describes how a candidate<br \/>\n  device performs under stated conditions. The capacity-review task is to determine<br \/>\n  whether the second adequately covers the first.\n<\/p>\n<p>\n  In practical terms:<br \/>\n  <strong>required tank duty \u2260 nominal connection size \u2260 manufacturer capacity at<br \/>\n  stated conditions.<\/strong>\n<\/p>\n<p>\n  For broader system context, see ZOBAI&#8217;s<br \/>\n  <a href=\"https:\/\/zobai.com\/zh\/applications\/storage-tanks\/\"><br \/>\n    storage tank pressure and vacuum protection<br \/>\n  <\/a><br \/>\n  application information.\n<\/p>\n<\/section>\n<section>\n<h2>What Determines the Inbreathing Capacity a Tank Needs?<\/h2>\n<p>\n  Inbreathing is required when the vapor-space pressure tends to fall and gas must<br \/>\n  enter the tank to prevent an excessive vacuum condition.\n<\/p>\n<p>\n  One important operating cause is <strong>liquid withdrawal<\/strong>. As liquid<br \/>\n  leaves, additional vapor-space volume becomes available and the tank&#8217;s<br \/>\n  gas-management or venting system must accommodate that change. Atmospheric<br \/>\n  cooling can create a second inward-flow requirement as vapor contracts or,<br \/>\n  where applicable, condenses.\n<\/p>\n<p>\n  Within its specific U.S. flammable-liquid tank scope,<br \/>\n  <a href=\"https:\/\/www.osha.gov\/laws-regs\/regulations\/standardnumber\/1910\/1910.106\" target=\"_blank\" rel=\"noopener\"><br \/>\n    OSHA 29 CFR 1910.106<br \/>\n  <\/a><br \/>\n  also identifies filling or emptying and atmospheric temperature changes as<br \/>\n  normal-venting causes.\n<\/p>\n<aside class=\"zobai-key-question\" aria-label=\"Inbreathing engineering question\">\n<p>\n    <strong>Engineering question:<\/strong><br \/>\n    What inward gas flow is required under all applicable normal operating and<br \/>\n    thermal cases?\n  <\/p>\n<\/aside>\n<p>\n  A project-side inbreathing review commonly needs the maximum relevant withdrawal<br \/>\n  condition, the applicable thermal\/cooling basis, the tank&#8217;s vacuum design or<br \/>\n  allowable basis, the proposed vacuum setting, and the way replacement gas enters<br \/>\n  the tank.\n<\/p>\n<p>\n  That last point can change the system being reviewed. In some arrangements,<br \/>\n  atmospheric air enters through a vacuum-relief function. In a blanketed system,<br \/>\n  replacement gas may instead be supplied through a blanketing arrangement. The<br \/>\n  existence of blanketing should not be treated as proof that the vacuum-side<br \/>\n  protection question has disappeared.\n<\/p>\n<p>\n  Supplier application documents commonly request tank design vacuum, vacuum<br \/>\n  setting, emptying rate, thermal inbreathing and total inbreathing as separate<br \/>\n  fields. Those inputs help establish the duty; they do not create a universal<br \/>\n  calculation formula.\n<\/p>\n<p>\n  For product-level questions specifically concerning vacuum protection, use the<br \/>\n  dedicated<br \/>\n  <a href=\"https:\/\/zobai.com\/zh\/safety-valves\/vacuum-safety-valves\/\"><br \/>\n    vacuum safety valves<br \/>\n  <\/a><br \/>\n  owner rather than treating this comparison article as a product catalogue.\n<\/p>\n<\/section>\n<section>\n<h2>What Determines the Outbreathing Capacity a Tank Needs?<\/h2>\n<p>\n  Outbreathing addresses the opposite pressure tendency, but it is not simply an<br \/>\n  inbreathing calculation with the sign reversed.\n<\/p>\n<p>\n  When liquid enters a tank, it displaces available vapor-space volume. Gas or<br \/>\n  vapor must leave as required by the operating condition. Warming of the tank<br \/>\n  and its contents can create another outward-flow contribution through vapor<br \/>\n  expansion and, where applicable under the selected method, additional vapor<br \/>\n  generation.\n<\/p>\n<aside class=\"zobai-key-question\" aria-label=\"Outbreathing engineering question\">\n<p>\n    <strong>Engineering question:<\/strong><br \/>\n    What outward flow must the tank handle under all applicable normal filling and<br \/>\n    thermal cases?\n  <\/p>\n<\/aside>\n<p>\n  That normally requires the relevant filling condition, thermal basis, pressure<br \/>\n  design or allowable limit, pressure-side vent setting, and any fluid or process<br \/>\n  information required by the project&#8217;s chosen calculation method.\n<\/p>\n<p>\n  A pressure setting should not be confused with capacity. The setting describes<br \/>\n  a pressure condition associated with operation of the device; it does not state<br \/>\n  how much flow the tank requires or how much a particular vent can pass.\n<\/p>\n<p>\n  For the same reason, maximum filling rate alone is not automatically a complete<br \/>\n  outbreathing specification. The applicable normal outward-flow sources must first<br \/>\n  be identified and combined according to the governing engineering basis.\n<\/p>\n<p>\n  Protectoseal&#8217;s application worksheet separates filling-related venting, thermal<br \/>\n  outbreathing, additional outbreathing and total outbreathing. Emerson&#8217;s<br \/>\n  pressure\/vacuum application data likewise separates filling and emptying,<br \/>\n  pressure and vacuum settings, backpressure, and the two directional capacities.<br \/>\n  See the<br \/>\n  <a href=\"https:\/\/protectoseal.com\/PDF_VENTS\/MISCELLANEOUS\/Breather-Vent-Worksheet.pdf\" target=\"_blank\" rel=\"noopener\"><br \/>\n    Protectoseal application worksheet<br \/>\n  <\/a><br \/>\n  \u548c<br \/>\n  <a href=\"https:\/\/www.emerson.com\/is\/content\/emerson\/en\/final-control\/pressure-management\/bu-content\/general\/enardo\/documents\/Enardo_Catalog_eBook.pdf\" target=\"_blank\" rel=\"noopener\"><br \/>\n    Emerson Enardo tank-management catalog<br \/>\n  <\/a>.\n<\/p>\n<p>\n  That still leaves an important boundary:<br \/>\n  <strong>not every outward-flow relief case is normal outbreathing.<\/strong>\n<\/p>\n<\/section>\n<section>\n<h2>Normal Venting vs Emergency Venting: Why the Duties Must Stay Separate<\/h2>\n<p>\n  Normal venting and emergency venting are related to the same tank, but they are<br \/>\n  not the same engineering duty.\n<\/p>\n<p>\n  <a href=\"https:\/\/www.iso.org\/standard\/44643.html\" target=\"_blank\" rel=\"noopener\">ISO 28300<\/a><br \/>\n  covers both normal and emergency vapor venting for atmospheric and low-pressure<br \/>\n  storage tanks. The separation itself is important: completion of a normal<br \/>\n  inbreathing\/outbreathing check should not be presented as evidence that a<br \/>\n  separate emergency case has also been resolved.\n<\/p>\n<aside class=\"zobai-scope-note\" aria-label=\"Normal versus emergency venting boundary\">\n<p>\n    <strong>\u8fb9\u754c\uff1a<\/strong><br \/>\n    Liquid-transfer and applicable thermal breathing belong to the normal<br \/>\n    inbreathing\/outbreathing review. An applicable external-fire or other emergency<br \/>\n    case requires its own relief-duty assessment.\n  <\/p>\n<\/aside>\n<p>\n  Commercial tank-protection practice reflects the same distinction: emergency<br \/>\n  pressure vents may be used to provide emergency capacity beyond the operating<br \/>\n  vent in relevant applications. This is a duty boundary, not a rule that every<br \/>\n  installation must use two separate physical devices.\n<\/p>\n<h3>Check the standard edition before using sizing tables or formulas<\/h3>\n<p>\n  Edition-sensitive information deserves special care. API&#8217;s current Standards<br \/>\n  Plan lists<br \/>\n  <a href=\"https:\/\/www.api.org\/products-and-services\/standards\/standards-plan\" target=\"_blank\" rel=\"noopener\"><br \/>\n    Standard 2000<br \/>\n  <\/a><br \/>\n  as Edition 8 in 2026. ISO continues to list ISO 28300:2008 as its current<br \/>\n  published edition while a replacement is under development.\n<\/p>\n<p>\n  A project that relies on API 2000 or ISO 28300 should therefore confirm the<br \/>\n  edition adopted by that project before reusing formulas, factors or tables from<br \/>\n  older online guides.\n<\/p>\n<\/section>\n<section>\n<h2>How to Compare Required Capacity with a Tank Vent&#8217;s Published Rating<\/h2>\n<p>\n  Once required inbreathing and outbreathing duties have been established,<br \/>\n  <strong>candidate capacity screening<\/strong> becomes a direction-by-direction<br \/>\n  evidence check.\n<\/p>\n<figure class=\"wp-block-image size-full zobai-figure\" data-image-slot=\"IMG-01\"><img loading=\"lazy\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/tank-vent-inbreathing-outbreathing-img-01.webp\" alt=\"Diagram showing separate inbreathing and outbreathing capacity checks against vacuum-side and pressure-side tank vent performance data.\" title=\"Inbreathing vs Outbreathing Capacity for Tank Vents - IMG-01\" width=\"1200\" height=\"900\" class=\"wp-image-56944\" decoding=\"async\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/tank-vent-inbreathing-outbreathing-img-01.webp 1200w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/tank-vent-inbreathing-outbreathing-img-01-300x225.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/tank-vent-inbreathing-outbreathing-img-01-1024x768.webp 1024w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/tank-vent-inbreathing-outbreathing-img-01-768x576.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/tank-vent-inbreathing-outbreathing-img-01-16x12.webp 16w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/tank-vent-inbreathing-outbreathing-img-01-400x300.webp 400w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>Diagram showing separate inbreathing and outbreathing capacity checks against vacuum-side and pressure-side tank vent performance data.<\/figcaption><\/figure>\n<p>\n  The question is not whether a catalogue contains a flow number that looks large<br \/>\n  enough. The question is whether the published performance corresponds to the<br \/>\n  correct direction, pressure or vacuum condition, reference basis and device<br \/>\n  configuration.\n<\/p>\n<div\n  class=\"zobai-table-scroll\"\n  role=\"region\"\n  aria-label=\"Tank vent capacity verification checklist\"\n  tabindex=\"0\"\n><\/p>\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Verification item<\/th>\n<th scope=\"col\">Inbreathing check<\/th>\n<th scope=\"col\">Outbreathing check<\/th>\n<th scope=\"col\">\u82e5\u672a\u89e3\u51b3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Required project duty<\/td>\n<td>Required inward flow<\/td>\n<td>Required outward flow<\/td>\n<td>Keep the candidate unconfirmed<\/td>\n<\/tr>\n<tr>\n<td>Manufacturer performance<\/td>\n<td>Vacuum-side data<\/td>\n<td>Pressure-side data<\/td>\n<td>Request the missing data<\/td>\n<\/tr>\n<tr>\n<td>Setting<\/td>\n<td>\u771f\u7a7a\u6574\u5b9a\u503c<\/td>\n<td>Pressure setting<\/td>\n<td>Clarify the comparison basis<\/td>\n<\/tr>\n<tr>\n<td>Units \/ reference basis<\/td>\n<td>Confirm compatibility<\/td>\n<td>Confirm compatibility<\/td>\n<td>Reconcile before comparing<\/td>\n<\/tr>\n<tr>\n<td>Exact configuration<\/td>\n<td>\u786e\u8ba4<\/td>\n<td>\u786e\u8ba4<\/td>\n<td>Hold the capacity review<\/td>\n<\/tr>\n<tr>\n<td>Installed flow path<\/td>\n<td>Check if relevant<\/td>\n<td>Check if relevant<\/td>\n<td>Engineering review<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3>Match the correct direction first<\/h3>\n<p>\n  Pressure-side performance does not establish vacuum-side performance, and vice<br \/>\n  versa. Published vent literature may use separate flow curves for the two<br \/>\n  directions. Protectoseal, for example, notes that vacuum flow is represented on<br \/>\n  a separate curve in its<br \/>\n  <a href=\"https:\/\/protectoseal.com\/data\/ventviewpoint_3.pdf\" target=\"_blank\" rel=\"noopener\"><br \/>\n    weight-loaded vent flow guidance<br \/>\n  <\/a>.\n<\/p>\n<h3>Compare capacity at a meaningful operating condition<\/h3>\n<p>\n  Flow performance is related to the pressure or vacuum condition under which the<br \/>\n  vent is flowing. A set point by itself is therefore not a capacity value.\n<\/p>\n<p>\n  The capacity review needs performance data that can be related to the applicable<br \/>\n  project condition, not merely confirmation that the proposed set pressure or set<br \/>\n  vacuum exists.\n<\/p>\n<h3>Normalize the basis before comparing numbers<\/h3>\n<p>\n  A required-duty value and a supplier capacity value are useful only if their<br \/>\n  units and reference conditions can be reconciled.\n<\/p>\n<p>\n  If the two values use different reference bases, obtain the necessary rating<br \/>\n  conditions or conversion basis before treating the comparison as valid.\n<\/p>\n<h3>Do not select from nominal size alone<\/h3>\n<p>\n  Connection size is relevant to equipment configuration, but it does not by<br \/>\n  itself establish relieving capacity. Flow performance can depend on direction,<br \/>\n  vent design, setting or flowing condition and configuration.\n<\/p>\n<p>\n  Manufacturer flow data\u2014not the DN or NPS designation by itself\u2014provide the<br \/>\n  evidence needed for the capacity comparison.\n<\/p>\n<h3>Include the installed flow path when it changes the comparison<\/h3>\n<p>\n  A bare-vent capacity curve does not automatically describe every installed<br \/>\n  system. If the arrangement adds piping, a closed discharge path, a flame<br \/>\n  arrester or another significant restriction, review its effect where applicable<br \/>\n  rather than assigning an unsupported generic derating factor.\n<\/p>\n<p>\n  The correct outcome when essential evidence is missing is not to guess.<br \/>\n  A candidate should remain <strong>unconfirmed for capacity<\/strong> until the<br \/>\n  required duty and applicable manufacturer performance can be compared on a<br \/>\n  defensible basis. Capacity confirmation alone should not be read as proof of<br \/>\n  complete product suitability.\n<\/p>\n<\/section>\n<section>\n<h2>What to Include in a Tank Vent RFQ for Both Flow Directions<\/h2>\n<p>\n  A technically useful tank-vent RFQ should give the supplier enough information<br \/>\n  to review both duties without inferring critical project conditions.\n<\/p>\n<p>\n  \u201cQuote one DN100 tank vent\u201d does not establish whether the proposed device can<br \/>\n  handle either direction.\n<\/p>\n<h3>Tank and project basis<\/h3>\n<p>Depending on the project and applicable method, prepare the relevant:<\/p>\n<ul>\n<li>tank service and stored medium;<\/li>\n<li>tank capacity or geometry where needed;<\/li>\n<li>pressure and vacuum design or allowable limits;<\/li>\n<li>operating and design temperature information needed for the review;<\/li>\n<li>applicable project specification or venting standard;<\/li>\n<li>blanketing or vapor-management arrangement.<\/li>\n<\/ul>\n<h3>Inbreathing duty<\/h3>\n<p>Keep the vacuum-side data explicit:<\/p>\n<ul>\n<li>required total inbreathing capacity;<\/li>\n<li>maximum withdrawal or emptying condition;<\/li>\n<li>applicable thermal inbreathing basis;<\/li>\n<li>vacuum setting;<\/li>\n<li>replacement-gas arrangement where relevant.<\/li>\n<\/ul>\n<h3>Outbreathing duty<\/h3>\n<p>Keep the pressure-side requirement separate:<\/p>\n<ul>\n<li>required total outbreathing capacity;<\/li>\n<li>maximum filling condition;<\/li>\n<li>applicable thermal outbreathing basis;<\/li>\n<li>pressure setting;<\/li>\n<li>any additional normal outward-flow source established by the project basis.<\/li>\n<\/ul>\n<h3>Installation configuration<\/h3>\n<p>Where relevant, also identify:<\/p>\n<ul>\n<li>vent-to-atmosphere versus pipe-away arrangement;<\/li>\n<li>inlet and outlet configuration;<\/li>\n<li>expected backpressure;<\/li>\n<li>flame or detonation arrester;<\/li>\n<li>other significant restrictions in the flow path.<\/li>\n<\/ul>\n<p>\n  These fields are not presented as a universal regulatory checklist. They reflect<br \/>\n  the types of engineering data that established vent manufacturers request when<br \/>\n  matching pressure\/vacuum equipment to a tank duty.\n<\/p>\n<h3>Evidence to request from the supplier<\/h3>\n<p>\n  The return package should allow the engineer to review the proposed<br \/>\n  configuration rather than rely on a model number alone. Relevant evidence may<br \/>\n  include:\n<\/p>\n<ul>\n<li>the exact candidate configuration;<\/li>\n<li>vacuum-side capacity data;<\/li>\n<li>pressure-side capacity data;<\/li>\n<li>applicable pressure and vacuum settings;<\/li>\n<li>flow curves or capacity tables and their rating basis;<\/li>\n<li>units and reference conditions;<\/li>\n<li>installation or configuration limitations that affect the comparison.<\/li>\n<\/ul>\n<aside class=\"zobai-key-question\" aria-label=\"Tank vent procurement logic\">\n<p>\n    <strong>Procurement logic:<\/strong><br \/>\n    The project defines the required inbreathing and outbreathing duties. The<br \/>\n    supplier provides the corresponding performance evidence for the proposed<br \/>\n    device. Capacity screening can proceed only when those two sides can be matched<br \/>\n    on a compatible basis.\n  <\/p>\n<\/aside>\n<aside class=\"zobai-cta\" aria-label=\"\u4e0b\u4e00\u6b65\u5de5\u7a0b\u6b65\u9aa4\">\n<p>\n    <strong>Next step:<\/strong><br \/>\n    Use the checklist above to prepare the tank-vent duty package for the supplier<br \/>\n    responsible for the vent review.\n  <\/p>\n<p>\n    If the same project separately includes a ZOBAI safety-valve requirement,<br \/>\n    <a href=\"https:\/\/zobai.com\/zh\/engineering\/\">ZOBAI Engineering Support<\/a><br \/>\n    can be used for that documented safety-valve scope.\n  <\/p>\n<\/aside>\n<\/section>\n<\/article>\n<p> <script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@type\": \"BlogPosting\",\n    \"headline\": \"Inbreathing vs Outbreathing Capacity for Tank Vents\",\n    \"description\": \"Compare inbreathing and outbreathing capacity for tank vents, what drives each duty, and what to verify in supplier data before reviewing a candidate.\",\n    \"url\": \"https:\\\/\\\/zobai.com\\\/blog\\\/inbreathing-vs-outbreathing-capacity-for-tank-vents\\\/\",\n    \"mainEntityOfPage\": {\n        \"@type\": \"WebPage\",\n        \"@id\": \"https:\\\/\\\/zobai.com\\\/blog\\\/inbreathing-vs-outbreathing-capacity-for-tank-vents\\\/\"\n    },\n    \"publisher\": {\n        \"@type\": \"Organization\",\n        \"name\": \"ZOBAI\"\n    }\n}<\/script><\/p>","protected":false},"excerpt":{"rendered":"<p>Compare inbreathing and outbreathing capacity for tank vents, what drives each duty, and what to verify in supplier data before reviewing a candidate.<\/p>","protected":false},"author":2,"featured_media":56944,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-56928","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/zobai.com\/zh\/wp-json\/wp\/v2\/posts\/56928","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zobai.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zobai.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zobai.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zobai.com\/zh\/wp-json\/wp\/v2\/comments?post=56928"}],"version-history":[{"count":2,"href":"https:\/\/zobai.com\/zh\/wp-json\/wp\/v2\/posts\/56928\/revisions"}],"predecessor-version":[{"id":56964,"href":"https:\/\/zobai.com\/zh\/wp-json\/wp\/v2\/posts\/56928\/revisions\/56964"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zobai.com\/zh\/wp-json\/wp\/v2\/media\/56944"}],"wp:attachment":[{"href":"https:\/\/zobai.com\/zh\/wp-json\/wp\/v2\/media?parent=56928"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zobai.com\/zh\/wp-json\/wp\/v2\/categories?post=56928"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zobai.com\/zh\/wp-json\/wp\/v2\/tags?post=56928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}