{"id":53095,"date":"2026-05-15T03:35:18","date_gmt":"2026-05-15T03:35:18","guid":{"rendered":"https:\/\/zobai.com\/?page_id=53095"},"modified":"2026-05-15T03:39:03","modified_gmt":"2026-05-15T03:39:03","slug":"chemical-processing","status":"publish","type":"page","link":"https:\/\/zobai.com\/fr\/applications\/chemical-processing\/","title":{"rendered":"Traitement chimique"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"53095\" class=\"elementor elementor-53095\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8801fb3 e-con-full e-flex cmsmasters-bg-hide-none cmsmasters-bg-hide-none cmsmasters-block-default e-con e-parent\" data-id=\"8801fb3\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-1a4fad3c e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"1a4fad3c\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-733bf517 cmsmasters-breadcrumbs-alignment-left cmsmasters-breadcrumbs-type-rank cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-cmsmasters-breadcrumbs cmsmasters-widget-breadcrumbs\" data-id=\"733bf517\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"cmsmasters-breadcrumbs.default\">\n\t\t\t\t\t<div class=\"cmsmasters-widget-breadcrumbs__container\"><div class=\"cmsmasters-widget-breadcrumbs__content\"><nav aria-label=\"breadcrumbs\" class=\"rank-math-breadcrumb\"><p><span class=\"last\">Home<\/span><\/p><\/nav><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-64c11caf elementor-widget__width-initial cmsmasters-block-default cmsmasters-sticky-default elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"64c11caf\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;cmsmasters-fade-in-up&quot;,&quot;_animation_delay&quot;:150}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Chemical Processing Safety Valves for Pressure Relief Systems<\/h1>\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1bbff91d e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"1bbff91d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-35000825 cmsmasters-button-mobile-align-center cmsmasters-icon-arrangement-together cmsmasters-block-default cmsmasters-sticky-default elementor-invisible elementor-widget elementor-widget-cmsmasters-button\" data-id=\"35000825\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;cmsmasters-pop-in&quot;,&quot;_animation_delay&quot;:300}\" data-widget_type=\"cmsmasters-button.default\">\n\t\t\t\t\t<div class=\"elementor-widget-cmsmasters-button__button-container\"><div class=\"elementor-widget-cmsmasters-button__button-container-inner\"><a href=\"https:\/\/zobai.com\/fr\/?page_id=48437\" class=\"cmsmasters-button-link elementor-widget-cmsmasters-button__button cmsmasters-icon-view-default cmsmasters-icon-shape- cmsmasters-button-size-sm\" role=\"button\" tabindex=\"0\"><span class=\"elementor-widget-cmsmasters-button__content-wrapper cmsmasters-align-icon-right\"><span class=\"elementor-widget-cmsmasters-button__icon\"><i aria-hidden=\"true\" class=\"cmsmsdemo-icon- cmsms-demo-icon-arrows-1\"><\/i><\/span><span class=\"elementor-widget-cmsmasters-button__text\">CONTACT SALES<\/span><\/span><\/a><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-47a4d304 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"47a4d304\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-7c0748b9 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"7c0748b9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3ba94af2 e-con-full cmsmasters-effect cmsmasters-effect-type-transform e-flex cmsmasters-effect-hover-type-element cmsmasters-block-default e-con e-child\" data-id=\"3ba94af2\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;position&quot;:&quot;absolute&quot;,&quot;cms_transform_hover_type&quot;:&quot;element&quot;}\">\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-665ec76d e-con-full e-flex cmsmasters-block-default e-con e-parent\" data-id=\"665ec76d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1c3dcce0 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-html\" data-id=\"1c3dcce0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<style>\r\n  .zobai-chem-page {\r\n    --z-green: #0fad87;\r\n    --z-green-dark: #087761;\r\n    --z-ink: #20242a;\r\n    --z-muted: #66727f;\r\n    --z-bg: #f3f4f5;\r\n    --z-card: #ffffff;\r\n    --z-line: #e3e8ec;\r\n    --z-soft: #eef8f5;\r\n    --z-warning: #fff4e5;\r\n    --z-dark: #102522;\r\n    --z-radius: 22px;\r\n    font-family: inherit;\r\n    color: var(--z-ink);\r\n    background: var(--z-bg);\r\n  }\r\n\r\n  .zobai-chem-page * {\r\n    box-sizing: border-box;\r\n  }\r\n\r\n  .zobai-chem-section {\r\n    max-width: 100%;\r\n    margin: 0 auto;\r\n    padding: 88px 80px;\r\n  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20px;\r\n      border-radius: 24px;\r\n    }\r\n\r\n    .zobai-chem-flow-item {\r\n      grid-template-columns: 1fr;\r\n    }\r\n\r\n    .zobai-chem-case-top {\r\n      flex-direction: column;\r\n    }\r\n\r\n    .zobai-chem-case-data {\r\n      grid-template-columns: 1fr;\r\n    }\r\n\r\n    .zobai-chem-rfq-grid {\r\n      grid-template-columns: 1fr;\r\n    }\r\n  }\r\n<\/style>\r\n\r\n<div class=\"zobai-chem-page\">\r\n\r\n  <section class=\"zobai-chem-section\">\r\n    <div class=\"zobai-chem-hero-panel\">\r\n      <div class=\"zobai-chem-eyebrow\">Chemical Processing Pressure Relief<\/div>\r\n      <h2>Chemical Processing Safety Valves for Corrosive, Reactive and Utility Systems<\/h2>\r\n      <p>\r\n        Chemical processing safety valves protect reactors, pressure vessels, mixing tanks, distillation columns, heat exchangers, solvent systems, acid and alkali service, nitrogen blanketing systems, compressed gas packages and utility lines from overpressure. The correct PSV or PRV depends on the relief scenario, chemical compatibility, fluid phase, temperature, required relieving capacity, back pressure, discharge destination, seat tightness and documentation requirements.\r\n      <\/p>\r\n\r\n      <div class=\"zobai-chem-kpi\">\r\n        <div class=\"zobai-chem-kpi-item\">\r\n          <strong>Core Equipment<\/strong>\r\n          <span>Reactors, vessels, tanks, exchangers, columns and utility skids<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-chem-kpi-item\">\r\n          <strong>Key Relief Cases<\/strong>\r\n          <span>Blocked outlet, thermal expansion, reaction upset and tube rupture<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-chem-kpi-item\">\r\n          <strong>Service Risks<\/strong>\r\n          <span>Corrosion, crystallization, toxic vapor, solvent vapor and sticky media<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-chem-kpi-item\">\r\n          <strong>RFQ Output<\/strong>\r\n          <span>Datasheet, material compatibility, capacity basis and test documents<\/span>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-chem-section zobai-chem-section-soft\">\r\n    <div class=\"zobai-chem-eyebrow\">Industry Applications<\/div>\r\n    <h2 class=\"zobai-chem-title\">Where Safety Valves Are Used in Chemical Processing Plants<\/h2>\r\n    <p class=\"zobai-chem-lead\">\r\n      Chemical processing facilities include many pressure protection duties that look simple from the outside but are very different in engineering detail. A solvent thermal relief valve, acid tank PSV, batch reactor safety valve and steam utility safety valve should not be specified with one generic material or one generic sizing basis.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-chem-grid\">\r\n      <div class=\"zobai-chem-card zobai-chem-span-4\">\r\n        <h3>Batch Reactors<\/h3>\r\n        <p>\r\n          Used on stirred reactors, jacketed reactors, hydrogenation vessels and reaction kettles. Selection should consider exothermic reaction, gas generation, blocked vent, solvent vapor and possible two-phase relief.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-4\">\r\n        <h3>Mixing Tanks & Pressure Vessels<\/h3>\r\n        <p>\r\n          Used on pressurized mixing vessels, storage receivers, filter housings and process tanks. Medium compatibility, operating margin, agitation, foaming and discharge destination should be checked.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-4\">\r\n        <h3>Solvent & VOC Systems<\/h3>\r\n        <p>\r\n          Used on solvent receivers, distillation overhead systems, transfer lines and vapor recovery packages. Flammability, vapor pressure, static electricity control and closed discharge routing are important.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-4\">\r\n        <h3>Acid, Alkali & Corrosive Service<\/h3>\r\n        <p>\r\n          Used on systems handling sulfuric acid, hydrochloric acid, caustic soda, hypochlorite, ammonia solution and other aggressive media. Body, trim, spring and soft seat compatibility must be reviewed.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-4\">\r\n        <h3>Heat Exchanger & Thermal Fluid Systems<\/h3>\r\n        <p>\r\n          Used for tube rupture, blocked cooling, steam-side upset and hot oil thermal expansion. Temperature rating, pressure differential and discharge routing must be checked together.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-4\">\r\n        <h3>Utilities & Gas Packages<\/h3>\r\n        <p>\r\n          Used on compressed air, nitrogen, steam, water, chilled water, vacuum protection and small gas skids. Utility service still requires set pressure, capacity and material verification.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-chem-section\">\r\n    <div class=\"zobai-chem-eyebrow\">Relief Case Analysis<\/div>\r\n    <h2 class=\"zobai-chem-title\">Chemical Safety Valve Selection Starts With the Pressure Rise Cause<\/h2>\r\n    <p class=\"zobai-chem-lead\">\r\n      Chemical processing overpressure may come from reaction, heating, vapor generation, blocked flow, external fire, tube rupture, regulator failure or trapped liquid expansion. The governing case decides the required relieving capacity and valve configuration.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-chem-flow\">\r\n      <div class=\"zobai-chem-flow-item\">\r\n        <div class=\"zobai-chem-flow-num\">01<\/div>\r\n        <div>\r\n          <h3>Reaction Upset or Gas Generation<\/h3>\r\n          <p>\r\n            Batch reaction, neutralization, hydrogenation, oxidation or decomposition may generate vapor or gas quickly. The review should include reaction heat, gas generation rate, solvent vaporization, foaming and possible two-phase discharge.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-flow-item\">\r\n        <div class=\"zobai-chem-flow-num\">02<\/div>\r\n        <div>\r\n          <h3>Blocked Outlet or Closed Valve<\/h3>\r\n          <p>\r\n            Downstream blockage, incorrect valve operation, filter plugging or control failure can cause pressure rise while feed, pump or gas supply continues. This case is common on vessels, filters, columns, reactors and transfer skids.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-flow-item\">\r\n        <div class=\"zobai-chem-flow-num\">03<\/div>\r\n        <div>\r\n          <h3>Thermal Expansion of Trapped Liquid<\/h3>\r\n          <p>\r\n            Solvent, acid, alkali, heat transfer oil or water trapped between closed valves can expand when heated. Thermal relief valves are often small but essential for blocked-in liquid sections.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-flow-item\">\r\n        <div class=\"zobai-chem-flow-num\">04<\/div>\r\n        <div>\r\n          <h3>External Fire Exposure<\/h3>\r\n          <p>\r\n            Flammable solvent or chemical liquid in vessels can vaporize under fire exposure. Fire-case relief requires review of wetted surface, fluid properties, pressure boundary, discharge route and downstream treatment system.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-flow-item\">\r\n        <div class=\"zobai-chem-flow-num\">05<\/div>\r\n        <div>\r\n          <h3>Heat Exchanger Tube Rupture<\/h3>\r\n          <p>\r\n            A high-pressure utility or process side can overpressure the low-pressure side after tube failure. The review should include pressure differential, exchanger geometry, fluid phase and safe relief destination.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-flow-item\">\r\n        <div class=\"zobai-chem-flow-num\">06<\/div>\r\n        <div>\r\n          <h3>Regulator or Utility Failure<\/h3>\r\n          <p>\r\n            Nitrogen, compressed air, steam or inert gas regulator failure can overpressure low-pressure equipment. Utility systems require the same discipline in set pressure, capacity and safe discharge review.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-chem-section zobai-chem-section-soft\">\r\n    <div class=\"zobai-chem-eyebrow\">Application Case Data<\/div>\r\n    <h2 class=\"zobai-chem-title\">Chemical Processing Safety Valve Application Cases with Typical RFQ Data<\/h2>\r\n    <p class=\"zobai-chem-lead\">\r\n      These cases show how chemical processing safety valve requirements are usually described before model selection. Final sizing must be confirmed by project datasheet, process safety review, applicable code and verified relief calculation.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-chem-grid\">\r\n      <div class=\"zobai-chem-case zobai-chem-span-6\">\r\n        <div class=\"zobai-chem-case-top\">\r\n          <h3>Case 1: Jacketed Batch Reactor PSV<\/h3>\r\n          <span class=\"zobai-chem-case-tag\">Reaction Upset<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-chem-case-data\">\r\n          <div><b>Protected equipment:<\/b> 3 m\u00b3 jacketed reactor<\/div>\r\n          <div><b>Medium:<\/b> Solvent vapor with reaction gas<\/div>\r\n          <div><b>Normal pressure:<\/b> 2.5 barg<\/div>\r\n          <div><b>Set pressure:<\/b> 6 barg<\/div>\r\n          <div><b>Relieving temperature:<\/b> 95\u2013130\u00b0C<\/div>\r\n          <div><b>Relief cause:<\/b> Exothermic reaction or blocked vent<\/div>\r\n          <div><b>Discharge:<\/b> Scrubber or closed collection system<\/div>\r\n          <div><b>Key review:<\/b> Two-phase potential, foaming, solvent vapor and toxic release control<\/div>\r\n        <\/div>\r\n        <p>\r\n          Reactor service should not be sized from normal vent flow only. Reaction upset may generate vapor, gas or foam. The valve material, seat design, discharge destination and cleaning access must match the process chemistry.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-case zobai-chem-span-6\">\r\n        <div class=\"zobai-chem-case-top\">\r\n          <h3>Case 2: Solvent Receiver Safety Valve<\/h3>\r\n          <span class=\"zobai-chem-case-tag\">VOC \/ Fire Case<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-chem-case-data\">\r\n          <div><b>Protected equipment:<\/b> Solvent receiver vessel<\/div>\r\n          <div><b>Medium:<\/b> Ethanol, acetone or toluene vapor-liquid service<\/div>\r\n          <div><b>Normal pressure:<\/b> 0.5 barg<\/div>\r\n          <div><b>Set pressure:<\/b> 3 barg<\/div>\r\n          <div><b>Relieving temperature:<\/b> Ambient to 80\u00b0C<\/div>\r\n          <div><b>Relief cause:<\/b> Fire exposure or blocked vapor outlet<\/div>\r\n          <div><b>Discharge:<\/b> Vapor recovery, flare or safe vent system<\/div>\r\n          <div><b>Key review:<\/b> Flammability, vapor pressure, seat tightness and discharge routing<\/div>\r\n        <\/div>\r\n        <p>\r\n          Solvent service requires careful outlet planning. Discharging flammable vapor directly to an unsafe area can create secondary risk. Seat tightness, soft seal compatibility and static-sensitive handling may also be specified by the project.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-case zobai-chem-span-6\">\r\n        <div class=\"zobai-chem-case-top\">\r\n          <h3>Case 3: Hydrochloric Acid Process Vessel<\/h3>\r\n          <span class=\"zobai-chem-case-tag\">Corrosive Service<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-chem-case-data\">\r\n          <div><b>Protected equipment:<\/b> Acid preparation vessel<\/div>\r\n          <div><b>Medium:<\/b> Dilute hydrochloric acid vapor and liquid mist<\/div>\r\n          <div><b>Normal pressure:<\/b> 1 barg<\/div>\r\n          <div><b>Set pressure:<\/b> 4 barg<\/div>\r\n          <div><b>Relieving temperature:<\/b> 40\u201370\u00b0C<\/div>\r\n          <div><b>Relief cause:<\/b> Gas blanketing failure or blocked outlet<\/div>\r\n          <div><b>Discharge:<\/b> Acid scrubber or neutralization system<\/div>\r\n          <div><b>Key review:<\/b> Body, trim, spring isolation, gasket and seat material compatibility<\/div>\r\n        <\/div>\r\n        <p>\r\n          Acid service cannot be selected from pressure and size alone. Corrosion compatibility of the wetted parts, bonnet arrangement, spring protection and downstream neutralization system should be confirmed before quotation.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-case zobai-chem-span-6\">\r\n        <div class=\"zobai-chem-case-top\">\r\n          <h3>Case 4: Caustic Soda Transfer Line Thermal Relief<\/h3>\r\n          <span class=\"zobai-chem-case-tag\">Thermal Expansion<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-chem-case-data\">\r\n          <div><b>Protected equipment:<\/b> Isolated transfer line<\/div>\r\n          <div><b>Medium:<\/b> Sodium hydroxide solution<\/div>\r\n          <div><b>Relief cause:<\/b> Trapped liquid expansion<\/div>\r\n          <div><b>Normal pressure:<\/b> Pump discharge dependent<\/div>\r\n          <div><b>Set pressure:<\/b> Below line design limit<\/div>\r\n          <div><b>Temperature change:<\/b> Ambient heating or heat tracing<\/div>\r\n          <div><b>Discharge:<\/b> Return tank or safe collection point<\/div>\r\n          <div><b>Key review:<\/b> Crystallization risk, seal compatibility and safe return routing<\/div>\r\n        <\/div>\r\n        <p>\r\n          Caustic service may crystallize or plug small passages under certain conditions. Even when the valve is small, outlet routing and material compatibility should be treated as part of the engineering review.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-case zobai-chem-span-6\">\r\n        <div class=\"zobai-chem-case-top\">\r\n          <h3>Case 5: Nitrogen Blanketed Process Vessel<\/h3>\r\n          <span class=\"zobai-chem-case-tag\">Regulator Failure<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-chem-case-data\">\r\n          <div><b>Protected equipment:<\/b> Low-pressure process vessel<\/div>\r\n          <div><b>Medium:<\/b> Nitrogen and solvent vapor<\/div>\r\n          <div><b>Normal pressure:<\/b> 50\u2013100 mbar gauge<\/div>\r\n          <div><b>Set pressure:<\/b> Project vessel protection value<\/div>\r\n          <div><b>Relief cause:<\/b> Nitrogen regulator failure<\/div>\r\n          <div><b>Relieving temperature:<\/b> Ambient<\/div>\r\n          <div><b>Discharge:<\/b> Safe vent, scrubber or vapor recovery<\/div>\r\n          <div><b>Key review:<\/b> Low set pressure, seat tightness and compatibility with vapor service<\/div>\r\n        <\/div>\r\n        <p>\r\n          Nitrogen blanketing systems can overpressure low-pressure vessels if regulator failure is not considered. The relief device should match the vessel pressure boundary and the chemical vapor discharge destination.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-case zobai-chem-span-6\">\r\n        <div class=\"zobai-chem-case-top\">\r\n          <h3>Case 6: Heat Exchanger Tube Rupture Protection<\/h3>\r\n          <span class=\"zobai-chem-case-tag\">Tube Rupture<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-chem-case-data\">\r\n          <div><b>Protected equipment:<\/b> Low-pressure exchanger side<\/div>\r\n          <div><b>High-pressure side:<\/b> Steam or process fluid<\/div>\r\n          <div><b>Low-pressure side:<\/b> Solvent, water or product stream<\/div>\r\n          <div><b>Relief cause:<\/b> Tube rupture<\/div>\r\n          <div><b>Required data:<\/b> Pressure differential and exchanger geometry<\/div>\r\n          <div><b>Relieving temperature:<\/b> Process-dependent<\/div>\r\n          <div><b>Discharge:<\/b> Safe collection, vent or treatment system<\/div>\r\n          <div><b>Key review:<\/b> Transient relief flow, phase behavior and downstream limitation<\/div>\r\n        <\/div>\r\n        <p>\r\n          Tube rupture cases are often missed when a replacement valve is selected by nameplate only. The current duty, pressure difference and downstream limit should be checked before selecting the valve.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-chem-section\">\r\n    <div class=\"zobai-chem-eyebrow\">Service Data Matrix<\/div>\r\n    <h2 class=\"zobai-chem-title\">Chemical Processing Safety Valve Data Matrix<\/h2>\r\n\r\n    <div class=\"zobai-chem-table-wrap\">\r\n      <table class=\"zobai-chem-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Chemical Service<\/th>\r\n            <th>Typical Medium<\/th>\r\n            <th>Common Temperature Concern<\/th>\r\n            <th>Common Pressure Concern<\/th>\r\n            <th>Required Engineering Check<\/th>\r\n            <th>Risk if Missed<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>Batch reaction<\/td>\r\n            <td>Solvent vapor, reaction gas, foam, two-phase mixture<\/td>\r\n            <td>Reaction heat and upset temperature<\/td>\r\n            <td>Gas generation, blocked vent, runaway reaction<\/td>\r\n            <td>Reaction relief load, phase behavior, discharge to scrubber or collection system<\/td>\r\n            <td>Undersized valve, unsafe discharge or fouling at the seat<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Solvent processing<\/td>\r\n            <td>Ethanol, acetone, methanol, toluene, xylene, VOC vapor<\/td>\r\n            <td>Vapor pressure and fire exposure<\/td>\r\n            <td>Blocked outlet, fire case, thermal expansion<\/td>\r\n            <td>Flammability, vapor recovery, seat tightness, static-sensitive service<\/td>\r\n            <td>Flammable vapor release or wrong soft seal material<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Acid service<\/td>\r\n            <td>HCl, H\u2082SO\u2084, nitric acid, organic acids<\/td>\r\n            <td>Corrosion rate changes with concentration and temperature<\/td>\r\n            <td>Gas blanketing failure, blocked outlet, vapor generation<\/td>\r\n            <td>Body, trim, gasket, spring protection and scrubber discharge<\/td>\r\n            <td>Corrosion leakage, sticking or unsafe acid mist release<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Alkali service<\/td>\r\n            <td>NaOH, KOH, ammonia solution, alkaline process fluid<\/td>\r\n            <td>Crystallization or heat tracing condition<\/td>\r\n            <td>Thermal expansion and pump deadhead<\/td>\r\n            <td>Material compatibility, plugging risk, discharge to safe return point<\/td>\r\n            <td>Plugged outlet, external leakage or line overpressure<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Compressed gas and nitrogen<\/td>\r\n            <td>N\u2082, air, CO\u2082, inert gas, process gas<\/td>\r\n            <td>Usually ambient, unless compressed discharge is hot<\/td>\r\n            <td>Regulator failure, blocked outlet, overfilling<\/td>\r\n            <td>Set pressure margin, capacity, gas cleanliness and safe venting<\/td>\r\n            <td>Low-pressure vessel overpressure or repeated leakage<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Heat exchanger and utilities<\/td>\r\n            <td>Steam, water, hot oil, solvent, product stream<\/td>\r\n            <td>High temperature or thermal shock<\/td>\r\n            <td>Tube rupture, blocked cooling, thermal expansion<\/td>\r\n            <td>Pressure differential, temperature rating, discharge destination<\/td>\r\n            <td>Low-pressure side overpressure or unsafe discharge<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-chem-section zobai-chem-section-soft\">\r\n    <div class=\"zobai-chem-eyebrow\">Selection Framework<\/div>\r\n    <h2 class=\"zobai-chem-title\">How to Specify a Chemical Processing Safety Valve Correctly<\/h2>\r\n\r\n    <div class=\"zobai-chem-grid\">\r\n      <div class=\"zobai-chem-card zobai-chem-span-6\">\r\n        <h3>1. Define the protected equipment<\/h3>\r\n        <p>\r\n          Confirm whether the valve protects a reactor, vessel, filter housing, distillation system, exchanger, transfer line, gas package, storage receiver or utility system. Equipment type defines the pressure boundary and connection requirement.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-6\">\r\n        <h3>2. Confirm the governing relief case<\/h3>\r\n        <p>\r\n          Chemical processing overpressure may come from reaction, blocked outlet, fire exposure, regulator failure, tube rupture, thermal expansion or cooling failure. The governing case decides capacity and valve configuration.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-6\">\r\n        <h3>3. Check chemical compatibility<\/h3>\r\n        <p>\r\n          Body, nozzle, disc, guide, spring, bellows, soft seat, gasket and bolting materials should be reviewed against acid, alkali, solvent, chloride, oxidizer, ammonia or specialty chemical exposure.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-6\">\r\n        <h3>4. Review phase behavior and fouling<\/h3>\r\n        <p>\r\n          Flashing liquid, foam, viscous media, crystallization, slurry, sticky material or deposits can affect lift, reseating and maintenance. These risks should be stated clearly in the RFQ.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-6\">\r\n        <h3>5. Review discharge destination<\/h3>\r\n        <p>\r\n          Toxic, corrosive or flammable discharge should be routed to a scrubber, flare, recovery system, neutralization system or safe collection point as required by the process design.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-6\">\r\n        <h3>6. Confirm testing and documents<\/h3>\r\n        <p>\r\n          Chemical processing projects often require datasheets, material certificates, set pressure calibration, pressure test reports, seat tightness test records, cleaning notes, drawings and nameplate data.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-chem-section\">\r\n    <div class=\"zobai-chem-eyebrow\">Installation & Discharge<\/div>\r\n    <h2 class=\"zobai-chem-title\">Chemical Safety Valves Must Be Reviewed With the Discharge System<\/h2>\r\n\r\n    <div class=\"zobai-chem-grid\">\r\n      <div class=\"zobai-chem-card zobai-chem-span-7\">\r\n        <h3>Why the outlet route is part of the valve selection<\/h3>\r\n        <p>\r\n          Chemical processing relief streams may be flammable, toxic, corrosive, hot, odorous, condensable or reactive with air or water. The valve outlet should not be treated as a simple open discharge unless the project has confirmed it is safe.\r\n        <\/p>\r\n        <p>\r\n          Many chemical processing PSVs discharge to scrubbers, flare systems, vapor recovery units, neutralization tanks, closed drains or safe collection vessels. Back pressure, liquid accumulation, corrosion, crystallization and cleaning access can all affect valve performance.\r\n        <\/p>\r\n        <div class=\"zobai-chem-chip-row\">\r\n          <span class=\"zobai-chem-chip\">Scrubber Discharge<\/span>\r\n          <span class=\"zobai-chem-chip\">Neutralization System<\/span>\r\n          <span class=\"zobai-chem-chip\">Vapor Recovery<\/span>\r\n          <span class=\"zobai-chem-chip\">Back Pressure<\/span>\r\n          <span class=\"zobai-chem-chip\">Crystallization<\/span>\r\n          <span class=\"zobai-chem-chip\">Toxic Release Control<\/span>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-5\">\r\n        <h3>Field installation checks<\/h3>\r\n        <ul class=\"zobai-chem-list\">\r\n          <li>Keep inlet pressure loss within the project design limit.<\/li>\r\n          <li>Avoid dead legs where crystals, slurry or sticky media can accumulate.<\/li>\r\n          <li>Confirm back pressure from scrubber, flare or recovery system.<\/li>\r\n          <li>Support outlet piping without loading the valve body.<\/li>\r\n          <li>Route corrosive or toxic relief to an approved safe destination.<\/li>\r\n          <li>Provide maintenance access for testing, cleaning and valve removal.<\/li>\r\n          <li>Confirm whether flushing, heating, insulation or special cleaning is required.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-chem-section zobai-chem-section-soft\">\r\n    <div class=\"zobai-chem-eyebrow\">Standards & Documentation<\/div>\r\n    <h2 class=\"zobai-chem-title\">Standards and Documents to Confirm Before Ordering<\/h2>\r\n\r\n    <div class=\"zobai-chem-grid\">\r\n      <div class=\"zobai-chem-card zobai-chem-span-6\">\r\n        <h3>Common standard references<\/h3>\r\n        <p>\r\n          Chemical processing pressure relief specifications may reference API, ASME, ISO, EN, GB or owner standards depending on the facility location, protected equipment, medium and inspection requirement. The applicable standard should be confirmed before quotation.\r\n        <\/p>\r\n        <ul class=\"zobai-chem-list\">\r\n          <li><a href=\"\/standards\/api-520\/\">API 520<\/a> for pressure-relieving device sizing and selection reference where required by the project.<\/li>\r\n          <li><a href=\"\/standards\/api-521\/\">API 521<\/a> for pressure-relieving and depressuring system review where applicable.<\/li>\r\n          <li><a href=\"\/standards\/api-526\/\">API 526<\/a> when flanged steel pressure relief valve dimensions and ratings are specified.<\/li>\r\n          <li><a href=\"\/standards\/api-527\/\">API 527<\/a> when seat tightness testing is required.<\/li>\r\n          <li>ASME BPVC or local pressure vessel requirements where applicable.<\/li>\r\n          <li>ISO 4126 references when project specifications require excessive pressure protection safety valve standards.<\/li>\r\n          <li>Owner material and inspection specifications for corrosive, toxic, solvent, clean or specialty chemical service.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-6\">\r\n        <h3>Typical document package<\/h3>\r\n        <p>\r\n          Documentation should be agreed before manufacturing, especially for corrosive, toxic, solvent, reactor, heat exchanger and closed-discharge applications.\r\n        <\/p>\r\n        <ul class=\"zobai-chem-list\">\r\n          <li>Technical datasheet with model, size, orifice, set pressure and connection.<\/li>\r\n          <li>Sizing calculation or certified relieving capacity confirmation.<\/li>\r\n          <li>Set pressure calibration record.<\/li>\r\n          <li>Pressure test report and seat tightness test report when required.<\/li>\r\n          <li>Material certificate for pressure-retaining parts and trim when specified.<\/li>\r\n          <li>General arrangement drawing, dimension and weight.<\/li>\r\n          <li>Nameplate, tag number and project marking confirmation.<\/li>\r\n          <li>Cleaning, degreasing, drying or special packing requirement when specified.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-chem-section\">\r\n    <div class=\"zobai-chem-eyebrow\">RFQ Checklist<\/div>\r\n    <h2 class=\"zobai-chem-title\">Chemical Processing Safety Valve RFQ Data Checklist<\/h2>\r\n\r\n    <div class=\"zobai-chem-table-wrap\">\r\n      <table class=\"zobai-chem-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Required Data<\/th>\r\n            <th>Why It Matters<\/th>\r\n            <th>Example Input<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>Protected equipment<\/td>\r\n            <td>Defines the pressure boundary and design basis.<\/td>\r\n            <td>Reactor, pressure vessel, filter, solvent receiver, heat exchanger<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Relief scenario<\/td>\r\n            <td>Determines the governing required relieving capacity.<\/td>\r\n            <td>Reaction upset, blocked outlet, fire case, tube rupture, thermal expansion<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Medium and concentration<\/td>\r\n            <td>Affects material selection and chemical compatibility.<\/td>\r\n            <td>HCl 20%, NaOH 30%, ethanol, acetone, ammonia, nitrogen, slurry<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Fluid phase<\/td>\r\n            <td>Affects sizing method and discharge behavior.<\/td>\r\n            <td>Gas, vapor, liquid, flashing liquid, two-phase, foam<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Set pressure<\/td>\r\n            <td>Defines valve opening pressure.<\/td>\r\n            <td>3 barg, 6 barg, 10 bar, 150 psi<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Operating pressure<\/td>\r\n            <td>Confirms operating margin and leakage risk.<\/td>\r\n            <td>Normal and maximum operating pressure<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Required relieving capacity<\/td>\r\n            <td>Confirms whether the selected valve can protect the system.<\/td>\r\n            <td>kg\/h, Nm\u00b3\/h, SCFM, t\/h, GPM, L\/min<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Relieving temperature<\/td>\r\n            <td>Affects material, spring, seal and pressure rating.<\/td>\r\n            <td>Ambient, 80\u00b0C, 130\u00b0C, 250\u00b0C<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Back pressure<\/td>\r\n            <td>Influences valve stability, capacity and configuration.<\/td>\r\n            <td>Atmospheric discharge, scrubber, flare, closed collection system<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Fouling or crystallization risk<\/td>\r\n            <td>Affects seat design, maintenance and flushing requirements.<\/td>\r\n            <td>Crystals, slurry, sticky material, polymer, solids, viscous liquid<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Material requirement<\/td>\r\n            <td>Prevents corrosion, sticking, leakage and compatibility failure.<\/td>\r\n            <td>316L, Hastelloy, PTFE seat, EPDM, FKM, special gasket<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Required documents<\/td>\r\n            <td>Avoids delays after purchase order.<\/td>\r\n            <td>Datasheet, drawing, MTC, calibration report, pressure test, seat tightness report<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p class=\"zobai-chem-note\">\r\n      Final selection must be confirmed by project datasheet, chemical compatibility review, process conditions, applicable code, verified sizing basis and engineering review.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-chem-section zobai-chem-section-soft\">\r\n    <div class=\"zobai-chem-eyebrow\">Selection Errors<\/div>\r\n    <h2 class=\"zobai-chem-title\">Common Chemical Processing Safety Valve Selection Mistakes<\/h2>\r\n\r\n    <div class=\"zobai-chem-grid\">\r\n      <div class=\"zobai-chem-card zobai-chem-span-4\">\r\n        <h3>Using only generic stainless steel<\/h3>\r\n        <p>\r\n          Stainless steel is not automatically suitable for every acid, alkali, chloride, solvent or oxidizer. Material should be selected from concentration, temperature and chemical compatibility.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-4\">\r\n        <h3>Ignoring reaction relief<\/h3>\r\n        <p>\r\n          Batch reactors may generate gas, vapor or foam during upset conditions. Normal vent flow does not always represent the required relief load.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-4\">\r\n        <h3>Discharging toxic vapor to an unsafe area<\/h3>\r\n        <p>\r\n          Toxic, corrosive or flammable relief should be routed to a scrubber, neutralization system, recovery system or other approved safe destination.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-4\">\r\n        <h3>Missing crystallization or plugging risk<\/h3>\r\n        <p>\r\n          Caustic, salt solution, slurry, polymer and sticky media can plug small passages or affect reseating. Maintenance and cleaning access should be included in the specification.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-4\">\r\n        <h3>Ignoring back pressure from scrubbers<\/h3>\r\n        <p>\r\n          Scrubbers, recovery systems and closed headers can create back pressure. This can affect capacity and stability if it is not reviewed before valve selection.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-card zobai-chem-span-4\">\r\n        <h3>Replacing by nameplate only<\/h3>\r\n        <p>\r\n          A nameplate helps, but replacement should also confirm current medium, concentration, relief case, capacity, material, seat type and discharge arrangement.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-chem-section\">\r\n    <div class=\"zobai-chem-eyebrow\">Related Engineering Resources<\/div>\r\n    <h2 class=\"zobai-chem-title\">Continue Your Chemical Processing Pressure Relief Review<\/h2>\r\n    <p class=\"zobai-chem-lead\">\r\n      These related pages help move from chemical processing applications to detailed safety valve selection, sizing, service condition review and standard confirmation.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-chem-link-grid\">\r\n      <a class=\"zobai-chem-link-card\" href=\"\/engineering\/safety-valve-selection-guide\/\">\r\n        <strong>Safety Valve Selection Guide<\/strong>\r\n        <span>Step-by-step guidance for selecting safety valves by medium, pressure, capacity, material and installation condition.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-chem-link-card\" href=\"\/engineering\/safety-valve-sizing\/\">\r\n        <strong>Safety Valve Sizing<\/strong>\r\n        <span>Review required capacity, orifice selection, pressure data and sizing inputs before RFQ.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-chem-link-card\" href=\"\/equipment\/reactors\/\">\r\n        <strong>Reactor Safety Valves<\/strong>\r\n        <span>For batch reactors, exothermic reaction, gas generation, solvent vapor and two-phase relief review.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-chem-link-card\" href=\"\/equipment\/pressure-vessels\/\">\r\n        <strong>Pressure Vessel Safety Valves<\/strong>\r\n        <span>For receivers, mixing vessels, filters, process tanks and protected pressure equipment.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-chem-link-card\" href=\"\/equipment\/heat-exchangers\/\">\r\n        <strong>Heat Exchanger Safety Valves<\/strong>\r\n        <span>For tube rupture, blocked cooling, steam-side failure and thermal expansion protection.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-chem-link-card\" href=\"\/applications\/corrosive-service\/\">\r\n        <strong>Corrosive Service<\/strong>\r\n        <span>For acids, alkalis, chlorides, ammonia-containing streams and aggressive chemical media.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-chem-link-card\" href=\"\/applications\/high-temperature\/\">\r\n        <strong>High Temperature Service<\/strong>\r\n        <span>For hot oil, steam, reactor heating, reboilers and elevated temperature process service.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-chem-link-card\" href=\"\/applications\/high-back-pressure\/\">\r\n        <strong>High Back Pressure Service<\/strong>\r\n        <span>For scrubbers, flare headers, vapor recovery units and closed discharge systems.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-chem-link-card\" href=\"\/medium\/steam\/\">\r\n        <strong>Steam Safety Valves<\/strong>\r\n        <span>For chemical plant utility steam, jacketed heating, reboilers and steam distribution systems.<\/span>\r\n      <\/a>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-chem-section zobai-chem-section-soft\">\r\n    <div class=\"zobai-chem-eyebrow\">FAQ<\/div>\r\n    <h2 class=\"zobai-chem-title\">Chemical Processing Safety Valve FAQ<\/h2>\r\n\r\n    <div class=\"zobai-chem-accordion\" data-zobai-chem-accordion>\r\n      <div class=\"zobai-chem-acc-item is-open\">\r\n        <button class=\"zobai-chem-acc-btn\" type=\"button\">What is the most important factor when selecting a chemical processing safety valve? <span>+<\/span><\/button>\r\n        <div class=\"zobai-chem-acc-body\">\r\n          The most important factor is the governing relief scenario. Reaction upset, blocked outlet, thermal expansion, fire exposure, tube rupture and regulator failure can create different required relieving capacities.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-acc-item\">\r\n        <button class=\"zobai-chem-acc-btn\" type=\"button\">Why is chemical compatibility important for safety valves? <span>+<\/span><\/button>\r\n        <div class=\"zobai-chem-acc-body\">\r\n          Chemical compatibility affects the valve body, trim, spring, bellows, soft seat, gasket and bolting materials. Acid, alkali, solvent, oxidizer, chloride or ammonia exposure can cause corrosion, leakage, sticking or premature failure if material is wrong.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-acc-item\">\r\n        <button class=\"zobai-chem-acc-btn\" type=\"button\">When should discharge be routed to a scrubber or collection system? <span>+<\/span><\/button>\r\n        <div class=\"zobai-chem-acc-body\">\r\n          Discharge should be routed to an approved safe destination when the relief stream is toxic, corrosive, flammable, odorous, hot, condensable or environmentally controlled. Scrubber, neutralization, recovery or closed collection systems may be required by the process design.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-acc-item\">\r\n        <button class=\"zobai-chem-acc-btn\" type=\"button\">What data is required for a chemical safety valve quotation? <span>+<\/span><\/button>\r\n        <div class=\"zobai-chem-acc-body\">\r\n          Provide protected equipment, relief scenario, medium name and concentration, phase, set pressure, operating pressure, required capacity, relieving temperature, back pressure, fouling risk, material requirement, connection and required documents.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-acc-item\">\r\n        <button class=\"zobai-chem-acc-btn\" type=\"button\">Can a replacement chemical PSV be selected by nameplate only? <span>+<\/span><\/button>\r\n        <div class=\"zobai-chem-acc-body\">\r\n          No. Nameplate data is useful, but replacement should also confirm current process conditions, chemical concentration, relief case, required capacity, discharge system, material compatibility, seat tightness and documentation requirements.\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-chem-section\">\r\n    <div class=\"zobai-chem-rfq\">\r\n      <div>\r\n        <div class=\"zobai-chem-eyebrow\">Engineering RFQ Support<\/div>\r\n        <h2>Prepare a Complete Chemical Processing PSV Datasheet Before Quotation<\/h2>\r\n        <p>\r\n          Send the protected equipment, relief scenario, medium name, concentration, phase, set pressure, operating pressure, required capacity, temperature, back pressure, fouling risk, material requirement, connection standard and required documents. A complete datasheet helps avoid unsafe assumptions and speeds up engineering review.\r\n        <\/p>\r\n        <div class=\"zobai-chem-btn-row\">\r\n          <a class=\"zobai-chem-btn zobai-chem-btn-primary\" href=\"\/contact\/\">Request Engineering Quote<\/a>\r\n          <a class=\"zobai-chem-btn zobai-chem-btn-secondary\" href=\"\/ask-an-engineer\/\">Ask an Engineer<\/a>\r\n          <a class=\"zobai-chem-btn zobai-chem-btn-secondary\" href=\"\/catalog-pdf\/\">Download Catalog PDF<\/a>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-chem-rfq-box\">\r\n        <h3>Minimum RFQ data<\/h3>\r\n        <div class=\"zobai-chem-rfq-grid\">\r\n          <div class=\"zobai-chem-rfq-item\">Protected Equipment<\/div>\r\n          <div class=\"zobai-chem-rfq-item\">Relief Scenario<\/div>\r\n          <div class=\"zobai-chem-rfq-item\">Medium \/ Concentration<\/div>\r\n          <div class=\"zobai-chem-rfq-item\">Fluid Phase<\/div>\r\n          <div class=\"zobai-chem-rfq-item\">Set Pressure<\/div>\r\n          <div class=\"zobai-chem-rfq-item\">Operating Pressure<\/div>\r\n          <div class=\"zobai-chem-rfq-item\">Required Capacity<\/div>\r\n          <div class=\"zobai-chem-rfq-item\">Temperature<\/div>\r\n          <div class=\"zobai-chem-rfq-item\">Back Pressure<\/div>\r\n          <div class=\"zobai-chem-rfq-item\">Fouling Risk<\/div>\r\n          <div class=\"zobai-chem-rfq-item\">Material<\/div>\r\n          <div class=\"zobai-chem-rfq-item\">Documents<\/div>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n<\/div>\r\n\r\n<script>\r\n  (function () {\r\n    var accordions = document.querySelectorAll('[data-zobai-chem-accordion]');\r\n    accordions.forEach(function (accordion) {\r\n      var items = accordion.querySelectorAll('.zobai-chem-acc-item');\r\n\r\n      items.forEach(function (item) {\r\n        var button = item.querySelector('.zobai-chem-acc-btn');\r\n        button.addEventListener('click', function () {\r\n          var isOpen = item.classList.contains('is-open');\r\n\r\n          items.forEach(function (i) {\r\n            i.classList.remove('is-open');\r\n          });\r\n\r\n          if (!isOpen) {\r\n            item.classList.add('is-open');\r\n          }\r\n        });\r\n      });\r\n    });\r\n  })();\r\n<\/script>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"FAQPage\",\r\n  \"mainEntity\": [\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What is the most important factor when selecting a chemical processing safety valve?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"The most important factor is the governing relief scenario. Reaction upset, blocked outlet, thermal expansion, fire exposure, tube rupture and regulator failure can create different required relieving capacities.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Why is chemical compatibility important for safety valves?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Chemical compatibility affects the valve body, trim, spring, bellows, soft seat, gasket and bolting materials. Acid, alkali, solvent, oxidizer, chloride or ammonia exposure can cause corrosion, leakage, sticking or premature failure if material is wrong.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"When should discharge be routed to a scrubber or collection system?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Discharge should be routed to an approved safe destination when the relief stream is toxic, corrosive, flammable, odorous, hot, condensable or environmentally controlled. Scrubber, neutralization, recovery or closed collection systems may be required by the process design.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What data is required for a chemical safety valve quotation?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Provide protected equipment, relief scenario, medium name and concentration, phase, set pressure, operating pressure, required capacity, relieving temperature, back pressure, fouling risk, material requirement, connection and required documents.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can a replacement chemical PSV be selected by nameplate only?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"No. Nameplate data is useful, but replacement should also confirm current process conditions, chemical concentration, relief case, required capacity, discharge system, material compatibility, seat tightness and documentation requirements.\"\r\n      }\r\n    }\r\n  ]\r\n}\r\n<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2947e5f5 e-con-full e-flex cmsmasters-block-default e-con e-parent\" data-id=\"2947e5f5\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-348f33da e-con-full cmsmasters-effect cmsmasters-effect-type-transform e-flex cmsmasters-effect-hover-type-element cmsmasters-block-default e-con e-child\" data-id=\"348f33da\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;position&quot;:&quot;absolute&quot;,&quot;cms_transform_hover_type&quot;:&quot;element&quot;}\">\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-307ed5a4 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"307ed5a4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-4ad26375 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"4ad26375\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5283a013 elementor-position-inline-start elementor-mobile-position-inline-start elementor-view-default cmsmasters-block-default cmsmasters-sticky-default elementor-invisible elementor-widget elementor-widget-icon-box\" data-id=\"5283a013\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;cmsmasters-fade-in-left&quot;}\" data-widget_type=\"icon-box.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<span  class=\"elementor-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"cmsmsdemo-icon- cmsms-demo-icon-arrows-2\"><\/i>\t\t\t\t<\/span>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<h3 class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<span  >\n\t\t\t\t\t\t\tFEATURED SERIES\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-62fe3f52 elementor-widget__width-initial cmsmasters-block-default cmsmasters-sticky-default elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"62fe3f52\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;cmsmasters-fade-in-up&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Featured Safety Valve Series<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-418afc45 elementor-widget__width-initial cmsmasters-block-default cmsmasters-sticky-default elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"418afc45\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;cmsmasters-fade-in-right&quot;,&quot;_animation_tablet&quot;:&quot;cmsmasters-fade-in-up&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<div class=\"elementor-heading-title elementor-size-default\">Explore selected ZOBAI safety valve series for high-pressure service, back pressure conditions, steam systems, hygienic process lines, and continuous protection applications. These featured models help buyers and engineers compare product directions across different service conditions.<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-547c4b78 elementor-pagination-type-bullets elementor-arrows-position-inside elementor-pagination-position-outside cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-n-carousel\" data-id=\"547c4b78\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;carousel_items&quot;:[{&quot;slide_title&quot;:&quot;Slide #1&quot;,&quot;_id&quot;:&quot;01fe9a5&quot;},{&quot;slide_title&quot;:&quot;Slide #1&quot;,&quot;_id&quot;:&quot;945d82b&quot;},{&quot;slide_title&quot;:&quot;Slide #1&quot;,&quot;_id&quot;:&quot;8ec93bd&quot;},{&quot;slide_title&quot;:&quot;Slide #1&quot;,&quot;_id&quot;:&quot;ee987c2&quot;}],&quot;slides_to_show&quot;:&quot;4&quot;,&quot;slides_to_show_tablet&quot;:&quot;2&quot;,&quot;slides_to_show_mobile&quot;:&quot;1&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;autoplay_speed&quot;:5000,&quot;pause_on_hover&quot;:&quot;yes&quot;,&quot;pause_on_interaction&quot;:&quot;yes&quot;,&quot;infinite&quot;:&quot;yes&quot;,&quot;speed&quot;:500,&quot;offset_sides&quot;:&quot;none&quot;,&quot;arrows&quot;:&quot;yes&quot;,&quot;pagination&quot;:&quot;bullets&quot;,&quot;image_spacing_custom&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;image_spacing_custom_widescreen&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;image_spacing_custom_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;image_spacing_custom_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-carousel.default\">\n\t\t\t\t\t\t\t<div class=\"e-n-carousel swiper\" role=\"region\" aria-roledescription=\"carousel\" aria-label=\"Carousel\" dir=\"ltr\">\n\t\t\t<div class=\"swiper-wrapper\" aria-live=\"off\">\n\t\t\t\t\t\t\t\t\t\t<div class=\"swiper-slide\" data-slide=\"1\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"1 of 4\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3ccbcd1e e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"3ccbcd1e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-29274ea5 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"29274ea5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-3c319628 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"3c319628\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-175000f7 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"175000f7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5b1d8a88 cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"5b1d8a88\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"850\" height=\"850\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service.webp\" class=\"attachment-large size-large wp-image-51693\" alt=\"A46Y pilot-operated relief valve with external pilot tubing and flanged body\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service.webp 850w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-300x300.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-150x150.webp 150w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-768x768.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-260x260.webp 260w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-40e0e366 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"40e0e366\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-4ef1ed18 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"4ef1ed18\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-774a607e cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"774a607e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">ZBA46 Series Pilot Operated Safety Valves<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-640d29f8 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"640d29f8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-213c045a cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"213c045a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;cms_transform_hover_type&quot;:&quot;element&quot;}\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/zobai.com\/fr\/applications\/chemical-processing\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"cmsmsdemo-icon- cmsms-demo-icon-arrows-1\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6969525c cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"6969525c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Pilot operated safety valves for higher-pressure service requiring tighter sealing and stable set pressure performance.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"swiper-slide\" data-slide=\"2\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"2 of 4\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5ef49468 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"5ef49468\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-73a08546 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"73a08546\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-4a31ca2d e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"4a31ca2d\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-38ff6e1e e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"38ff6e1e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7e3ec503 cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"7e3ec503\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"850\" height=\"850\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/wa42y-bellows-balanced-full-lift-safety-valve-back-pressure.webp\" class=\"attachment-large size-large wp-image-51697\" alt=\"WA42Y bellows-balanced full-lift safety valve with flanged connections\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/wa42y-bellows-balanced-full-lift-safety-valve-back-pressure.webp 850w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/wa42y-bellows-balanced-full-lift-safety-valve-back-pressure-300x300.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/wa42y-bellows-balanced-full-lift-safety-valve-back-pressure-150x150.webp 150w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/wa42y-bellows-balanced-full-lift-safety-valve-back-pressure-768x768.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/wa42y-bellows-balanced-full-lift-safety-valve-back-pressure-260x260.webp 260w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4f3c8dfa e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"4f3c8dfa\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-25c5f592 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"25c5f592\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-273c2709 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"273c2709\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">ZBWA42 Series Bellows Balanced Safety Valves<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-43666831 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"43666831\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2eeddf98 cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"2eeddf98\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;cms_transform_hover_type&quot;:&quot;element&quot;}\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/zobai.com\/fr\/applications\/chemical-processing\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"cmsmsdemo-icon- cmsms-demo-icon-arrows-1\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4bece2ec cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"4bece2ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Bellows balanced safety valves for back pressure applications where stable performance is important.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"swiper-slide\" data-slide=\"3\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"3 of 4\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1ac9ed72 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"1ac9ed72\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-f457621 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"f457621\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-3e76be1d e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"3e76be1d\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-4599a95 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"4599a95\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-30277aa cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"30277aa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"850\" height=\"850\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service.webp\" class=\"attachment-large size-large wp-image-51693\" alt=\"A46Y pilot-operated relief valve with external pilot tubing and flanged body\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service.webp 850w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-300x300.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-150x150.webp 150w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-768x768.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-260x260.webp 260w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3149ee80 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"3149ee80\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-4dc6973d e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"4dc6973d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-47ee1f83 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"47ee1f83\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">ZBA68 Series High Temperature Steam Safety Valves<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-509f2ce9 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"509f2ce9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-352aa70e cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"352aa70e\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;cms_transform_hover_type&quot;:&quot;element&quot;}\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/zobai.com\/fr\/applications\/chemical-processing\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"cmsmsdemo-icon- cmsms-demo-icon-arrows-1\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6ac3299d cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"6ac3299d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>High temperature steam safety valves for boilers, steam lines, and other elevated-temperature systems.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"swiper-slide\" data-slide=\"4\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"4 of 4\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-250f70a5 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"250f70a5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-674e38bc e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"674e38bc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-52f301b1 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"52f301b1\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-29b920cf e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"29b920cf\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-64916fa2 cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"64916fa2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"850\" height=\"850\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/svl488-stainless-steel-safety-valve-cleaning-system.webp\" class=\"attachment-large size-large wp-image-51695\" alt=\"SVL488 stainless steel safety valve for cleaning systems with sanitary clamp connection and lifting lever\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/svl488-stainless-steel-safety-valve-cleaning-system.webp 850w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/svl488-stainless-steel-safety-valve-cleaning-system-300x300.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/svl488-stainless-steel-safety-valve-cleaning-system-150x150.webp 150w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/svl488-stainless-steel-safety-valve-cleaning-system-768x768.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/svl488-stainless-steel-safety-valve-cleaning-system-260x260.webp 260w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-13e8644d e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"13e8644d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-20fa7617 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"20fa7617\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4d878666 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"4d878666\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SVL488 Series Sanitary Safety Valves<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-760039bc e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"760039bc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fc8c92 cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"fc8c92\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;cms_transform_hover_type&quot;:&quot;element&quot;}\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/zobai.com\/fr\/applications\/chemical-processing\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"cmsmsdemo-icon- cmsms-demo-icon-arrows-1\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-62ad9ed cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"62ad9ed\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Sanitary safety valves for hygienic process lines and cleaning systems requiring cleanable pressure protection.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<div class=\"elementor-swiper-button elementor-swiper-button-prev\" role=\"button\" tabindex=\"0\" aria-label=\"Previous\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-eicon-chevron-left\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M646 125C629 125 613 133 604 142L308 442C296 454 292 471 292 487 292 504 296 521 308 533L604 854C617 867 629 875 646 875 663 875 679 871 692 858 704 846 713 829 713 812 713 796 708 779 692 767L438 487 692 225C700 217 708 204 708 187 708 171 704 154 692 142 675 129 663 125 646 125Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t\t<div class=\"elementor-swiper-button elementor-swiper-button-next\" role=\"button\" tabindex=\"0\" aria-label=\"Next\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-eicon-chevron-right\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M696 533C708 521 713 504 713 487 713 471 708 454 696 446L400 146C388 133 375 125 354 125 338 125 325 129 313 142 300 154 292 171 292 187 292 204 296 221 308 233L563 492 304 771C292 783 288 800 288 817 288 833 296 850 308 863 321 871 338 875 354 875 371 875 388 867 400 854L696 533Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t\t\t\t<div class=\"swiper-pagination\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Home Chemical Processing Safety Valves for Pressure Relief Systems CONTACT SALES Chemical Processing Pressure Relief Chemical Processing Safety Valves for Corrosive, Reactive and Utility Systems Chemical processing safety valves protect reactors, pressure vessels, mixing tanks, distillation columns, heat exchangers, solvent systems, acid and alkali service, nitrogen blanketing systems, compressed gas packages and utility lines from&#8230;<\/p>","protected":false},"author":2,"featured_media":0,"parent":52780,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-53095","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/pages\/53095","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/comments?post=53095"}],"version-history":[{"count":4,"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/pages\/53095\/revisions"}],"predecessor-version":[{"id":53100,"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/pages\/53095\/revisions\/53100"}],"up":[{"embeddable":true,"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/pages\/52780"}],"wp:attachment":[{"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/media?parent=53095"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}