{"id":53185,"date":"2026-05-15T09:08:00","date_gmt":"2026-05-15T09:08:00","guid":{"rendered":"https:\/\/zobai.com\/?page_id=53185"},"modified":"2026-05-15T09:09:38","modified_gmt":"2026-05-15T09:09:38","slug":"high-temperature","status":"publish","type":"page","link":"https:\/\/zobai.com\/es\/applications\/high-temperature\/","title":{"rendered":"Alta Temperatura"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"53185\" class=\"elementor elementor-53185\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-57e52e99 e-con-full e-flex cmsmasters-bg-hide-none cmsmasters-bg-hide-none cmsmasters-block-default e-con e-parent\" data-id=\"57e52e99\" 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-22f670fd e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"22f670fd\" 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-4db1eced 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=\"4db1eced\" 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-437bf378 elementor-widget__width-initial cmsmasters-block-default cmsmasters-sticky-default elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"437bf378\" 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\">High Temperature Safety Valves for Steam, Thermal Oil, Hot Gas and Process Systems<\/h1>\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-35f80ed0 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"35f80ed0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-18de4dd3 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=\"18de4dd3\" data-element_type=\"widget\" data-e-type=\"widget\" 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elementor-element-5f6533f7 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"5f6533f7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-25c97250 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"25c97250\" 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-47d79d8a 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=\"47d79d8a\" 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-6b45b6d4 e-con-full e-flex 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}\r\n\r\n    .zobai-ht-rfq {\r\n      grid-template-columns: 1fr;\r\n    }\r\n  }\r\n\r\n  @media (max-width: 640px) {\r\n    .zobai-ht-section {\r\n      padding: 58px 18px;\r\n    }\r\n\r\n    .zobai-ht-card,\r\n    .zobai-ht-hero-panel,\r\n    .zobai-ht-rfq,\r\n    .zobai-ht-case {\r\n      padding: 26px 20px;\r\n      border-radius: 24px;\r\n    }\r\n\r\n    .zobai-ht-flow-item {\r\n      grid-template-columns: 1fr;\r\n    }\r\n\r\n    .zobai-ht-case-top {\r\n      flex-direction: column;\r\n    }\r\n\r\n    .zobai-ht-case-data {\r\n      grid-template-columns: 1fr;\r\n    }\r\n\r\n    .zobai-ht-rfq-grid {\r\n      grid-template-columns: 1fr;\r\n    }\r\n  }\r\n<\/style>\r\n\r\n<div class=\"zobai-ht-page\">\r\n\r\n  <section class=\"zobai-ht-section\">\r\n    <div class=\"zobai-ht-hero-panel\">\r\n      <div class=\"zobai-ht-eyebrow\">High Temperature PSV Service<\/div>\r\n      <h2>High Temperature Safety Valves for Steam, Thermal Oil, Hot Gas and Process Systems<\/h2>\r\n      <p>\r\n        High temperature safety valves protect steam systems, superheated steam headers, boilers, heat recovery systems, thermal oil heaters, hot water generators, reactors, reboilers, vaporizers, hot gas lines, catalytic units, furnace coils and process skids from overpressure. Correct selection starts with set pressure, relieving temperature, required capacity, medium phase, allowable overpressure, material strength at temperature, spring exposure, seat leakage, gasket and packing selection, inlet pressure loss, outlet reaction force, back pressure, safe discharge routing and required inspection documents.\r\n      <\/p>\r\n\r\n      <div class=\"zobai-ht-kpi\">\r\n        <div class=\"zobai-ht-kpi-item\">\r\n          <strong>Core Equipment<\/strong>\r\n          <span>Steam headers, boilers, reactors, reboilers, thermal oil skids and hot gas systems<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-ht-kpi-item\">\r\n          <strong>Key Relief Cases<\/strong>\r\n          <span>Blocked outlet, control failure, fire case, thermal expansion and vapor generation<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-ht-kpi-item\">\r\n          <strong>Engineering Focus<\/strong>\r\n          <span>Relieving temperature, material strength, metal seat, gasket and outlet force<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-ht-kpi-item\">\r\n          <strong>RFQ Output<\/strong>\r\n          <span>Datasheet, sizing basis, material certificates, calibration and pressure test reports<\/span>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-ht-section zobai-ht-section-soft\">\r\n    <div class=\"zobai-ht-eyebrow\">High Temperature Applications<\/div>\r\n    <h2 class=\"zobai-ht-title\">Where High Temperature Safety Valves Are Used<\/h2>\r\n    <p class=\"zobai-ht-lead\">\r\n      High temperature service changes the safety valve design because body material, trim material, spring exposure, gasket sealing, seat leakage, bolting strength and discharge piping stress all become more critical as temperature rises.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-ht-grid\">\r\n      <div class=\"zobai-ht-card zobai-ht-span-4\">\r\n        <h3>Steam and Superheated Steam Systems<\/h3>\r\n        <p>\r\n          Used on steam headers, boilers, superheaters, heat recovery systems, steam drums, steam separators and process steam skids. Selection should review steam capacity, set pressure, superheat temperature, lifting lever requirement, blowdown and safe discharge.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-4\">\r\n        <h3>Thermal Oil and Hot Oil Systems<\/h3>\r\n        <p>\r\n          Used on thermal oil heaters, hot oil circulation pumps, expansion tanks, heat transfer skids and jacketed process systems. Relief review should include pump deadhead, blocked outlet, thermal expansion, fire risk, fluid degradation and return-line back pressure.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-4\">\r\n        <h3>Reactors and Exothermic Process Vessels<\/h3>\r\n        <p>\r\n          Used on chemical reactors, hydrogenation reactors, polymerization vessels, autoclaves and high-temperature process vessels. Key checks include reaction heat, vapor generation, two-phase relief, toxic discharge and material compatibility.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-4\">\r\n        <h3>Reboilers, Vaporizers and Heat Exchangers<\/h3>\r\n        <p>\r\n          Used on kettle reboilers, thermosiphon reboilers, vaporizers, condensers, steam heaters and shell-and-tube exchangers. Relief scenarios include blocked vapor outlet, tube rupture, steam control failure and flashing liquid.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-4\">\r\n        <h3>Hot Gas and Furnace Systems<\/h3>\r\n        <p>\r\n          Used on hot gas headers, fired heater coils, catalytic oxidizers, incineration packages and exhaust heat recovery units. Valve review should include high gas temperature, oxidation, insulation clearance, noise and vent routing.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-4\">\r\n        <h3>High Temperature Skid Packages<\/h3>\r\n        <p>\r\n          Used on packaged steam skids, thermal fluid skids, heater skids, reactor skids and pilot plants. Compact layout requires review of valve orientation, outlet support, insulation, access and nearby instrument temperature limits.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-ht-section\">\r\n    <div class=\"zobai-ht-eyebrow\">Relief Case Analysis<\/div>\r\n    <h2 class=\"zobai-ht-title\">High Temperature PSV Selection Starts With Relieving Temperature and Failure Scenario<\/h2>\r\n    <p class=\"zobai-ht-lead\">\r\n      High temperature service is not defined by normal operating temperature only. The valve should be selected from the relieving temperature during the credible overpressure case, including blocked flow, utility failure, fire exposure, exothermic reaction, hot oil pump deadhead or vapor generation.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-ht-flow\">\r\n      <div class=\"zobai-ht-flow-item\">\r\n        <div class=\"zobai-ht-flow-num\">01<\/div>\r\n        <div>\r\n          <h3>Steam Pressure Control Failure<\/h3>\r\n          <p>\r\n            Failed pressure control, blocked outlet or excessive boiler firing can raise steam pressure. Safety valve selection should review saturated or superheated steam condition, required steam capacity, set pressure, blowdown and discharge pipe design.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-flow-item\">\r\n        <div class=\"zobai-ht-flow-num\">02<\/div>\r\n        <div>\r\n          <h3>Thermal Oil Pump Deadhead or Blocked Outlet<\/h3>\r\n          <p>\r\n            Hot oil pumps can overpressure heaters, exchangers or skid piping when discharge is blocked. Relief sizing should use pump curve, operating temperature, thermal oil properties, return header pressure and safe containment.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-flow-item\">\r\n        <div class=\"zobai-ht-flow-num\">03<\/div>\r\n        <div>\r\n          <h3>Blocked-In Liquid Thermal Expansion<\/h3>\r\n          <p>\r\n            Liquid trapped in hot piping, heat exchangers, reactor jackets or thermal oil loops can expand rapidly when heated. Thermal relief valves are often required even where the trapped volume is small.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-flow-item\">\r\n        <div class=\"zobai-ht-flow-num\">04<\/div>\r\n        <div>\r\n          <h3>Excessive Heat Input or Cooling Failure<\/h3>\r\n          <p>\r\n            Reactors, reboilers, vaporizers and condensers may generate vapor when heat input continues or cooling fails. The PSV may need to handle vapor, flashing liquid or two-phase flow.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-flow-item\">\r\n        <div class=\"zobai-ht-flow-num\">05<\/div>\r\n        <div>\r\n          <h3>Fire Exposure and External Heating<\/h3>\r\n          <p>\r\n            High-temperature vessels, hot hydrocarbon systems and solvent service may need fire-case relief review. Valve material, discharge routing, flame exposure, outlet reaction force and back pressure should be reviewed together.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-flow-item\">\r\n        <div class=\"zobai-ht-flow-num\">06<\/div>\r\n        <div>\r\n          <h3>Reaction Heat or Gas Generation<\/h3>\r\n          <p>\r\n            Exothermic reactions, decomposition, catalyst upset or wrong addition can generate vapor or gas at elevated temperature. Relief review should include reaction data, phase behavior, fouling and discharge treatment.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-ht-section zobai-ht-section-soft\">\r\n    <div class=\"zobai-ht-eyebrow\">Application Case Data<\/div>\r\n    <h2 class=\"zobai-ht-title\">High Temperature Safety Valve Application Cases with Typical RFQ Data<\/h2>\r\n    <p class=\"zobai-ht-lead\">\r\n      These cases show how high temperature safety valve requirements are commonly described before model selection. Final sizing must be confirmed by equipment datasheet, relieving temperature, process conditions, applicable code, verified relief calculation and engineering review.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-ht-grid\">\r\n      <div class=\"zobai-ht-case zobai-ht-span-6\">\r\n        <div class=\"zobai-ht-case-top\">\r\n          <h3>Case 1: Superheated Steam Header Safety Valve<\/h3>\r\n          <span class=\"zobai-ht-case-tag\">Superheated Steam<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-ht-case-data\">\r\n          <div><b>Protected equipment:<\/b> Main steam header<\/div>\r\n          <div><b>Medium:<\/b> Superheated steam<\/div>\r\n          <div><b>Set pressure:<\/b> 42 barg<\/div>\r\n          <div><b>Relieving temperature:<\/b> 420\u00b0C<\/div>\r\n          <div><b>Relief cause:<\/b> Pressure control failure or blocked steam outlet<\/div>\r\n          <div><b>Required capacity:<\/b> Project steam balance or boiler output basis<\/div>\r\n          <div><b>Discharge:<\/b> Outdoor steam vent or silencer<\/div>\r\n          <div><b>Key review:<\/b> Steam capacity, nozzle reaction force, drainability, noise and high-temperature trim<\/div>\r\n        <\/div>\r\n        <p>\r\n          Superheated steam valves require careful material and discharge design. Outlet piping should be supported, drained and routed to avoid personnel exposure from high-temperature steam.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-case zobai-ht-span-6\">\r\n        <div class=\"zobai-ht-case-top\">\r\n          <h3>Case 2: Thermal Oil Heater Relief Valve<\/h3>\r\n          <span class=\"zobai-ht-case-tag\">Thermal Oil<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-ht-case-data\">\r\n          <div><b>Protected equipment:<\/b> Thermal oil heater outlet and circulation loop<\/div>\r\n          <div><b>Medium:<\/b> Heat transfer oil<\/div>\r\n          <div><b>Normal pressure:<\/b> 5\u20138 barg<\/div>\r\n          <div><b>Set pressure:<\/b> 10 barg<\/div>\r\n          <div><b>Relieving temperature:<\/b> 280\u2013320\u00b0C<\/div>\r\n          <div><b>Relief cause:<\/b> Pump deadhead, blocked outlet or thermal expansion<\/div>\r\n          <div><b>Discharge:<\/b> Expansion tank, return header or safe collection<\/div>\r\n          <div><b>Key review:<\/b> Oil viscosity, degradation, fire risk, back pressure and seat tightness<\/div>\r\n        <\/div>\r\n        <p>\r\n          Thermal oil service requires review of hot liquid discharge, fire risk and return route availability. Continuous leakage can create odor, smoke, fire or maintenance problems.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-case zobai-ht-span-6\">\r\n        <div class=\"zobai-ht-case-top\">\r\n          <h3>Case 3: Reboiler PSV for High Temperature Vapor Relief<\/h3>\r\n          <span class=\"zobai-ht-case-tag\">Reboiler<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-ht-case-data\">\r\n          <div><b>Protected equipment:<\/b> Kettle or thermosiphon reboiler<\/div>\r\n          <div><b>Medium:<\/b> Hydrocarbon vapor, solvent vapor or flashing liquid<\/div>\r\n          <div><b>Normal pressure:<\/b> 6 barg<\/div>\r\n          <div><b>Set pressure:<\/b> Equipment MAWP-based value<\/div>\r\n          <div><b>Relieving temperature:<\/b> 180\u2013260\u00b0C<\/div>\r\n          <div><b>Relief cause:<\/b> Blocked vapor outlet or excessive heat input<\/div>\r\n          <div><b>Discharge:<\/b> Flare header, condenser or closed collection<\/div>\r\n          <div><b>Key review:<\/b> Vapor generation, two-phase relief, flare back pressure and high-temperature gasket<\/div>\r\n        <\/div>\r\n        <p>\r\n          Reboiler relief can involve flashing or two-phase flow. The valve should be selected from heat input and actual relieving phase, not only normal vapor flow.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-case zobai-ht-span-6\">\r\n        <div class=\"zobai-ht-case-top\">\r\n          <h3>Case 4: High Temperature Reactor Safety Valve<\/h3>\r\n          <span class=\"zobai-ht-case-tag\">Reaction Relief<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-ht-case-data\">\r\n          <div><b>Protected equipment:<\/b> Jacketed chemical reactor or autoclave<\/div>\r\n          <div><b>Medium:<\/b> Solvent vapor, nitrogen, reaction gas or two-phase mixture<\/div>\r\n          <div><b>MAWP:<\/b> 16 barg<\/div>\r\n          <div><b>Set pressure:<\/b> 15 barg<\/div>\r\n          <div><b>Relieving temperature:<\/b> 200\u2013280\u00b0C<\/div>\r\n          <div><b>Relief cause:<\/b> Exothermic reaction, cooling failure or blocked vent<\/div>\r\n          <div><b>Discharge:<\/b> Scrubber, condenser, flare or quench tank<\/div>\r\n          <div><b>Key review:<\/b> Reaction data, toxicity, fouling, two-phase behavior and corrosion resistance<\/div>\r\n        <\/div>\r\n        <p>\r\n          Reactor high-temperature relief should be based on reaction hazard and credible failure cases. Material compatibility and discharge treatment are often as important as pressure setting.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-case zobai-ht-span-6\">\r\n        <div class=\"zobai-ht-case-top\">\r\n          <h3>Case 5: Hot Gas Header Relief Valve<\/h3>\r\n          <span class=\"zobai-ht-case-tag\">Hot Gas<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-ht-case-data\">\r\n          <div><b>Protected equipment:<\/b> Hot gas header or fired heater outlet system<\/div>\r\n          <div><b>Medium:<\/b> Hot process gas, flue gas or hydrocarbon vapor<\/div>\r\n          <div><b>Set pressure:<\/b> Project design value<\/div>\r\n          <div><b>Relieving temperature:<\/b> 350\u2013520\u00b0C<\/div>\r\n          <div><b>Relief cause:<\/b> Blocked outlet or pressure control failure<\/div>\r\n          <div><b>Discharge:<\/b> Vent stack, flare or hot gas relief header<\/div>\r\n          <div><b>Valve review:<\/b> Metal seat, high-temperature trim and suitable body material<\/div>\r\n          <div><b>Key review:<\/b> Oxidation, thermal stress, outlet expansion, noise and insulation clearance<\/div>\r\n        <\/div>\r\n        <p>\r\n          Hot gas service requires review of oxidation, thermal expansion and outlet pipe stress. Soft seats and standard low-temperature gaskets are normally unsuitable for this type of duty.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-case zobai-ht-span-6\">\r\n        <div class=\"zobai-ht-case-top\">\r\n          <h3>Case 6: High Temperature Water Generator Safety Valve<\/h3>\r\n          <span class=\"zobai-ht-case-tag\">Hot Water \/ Steam Heating<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-ht-case-data\">\r\n          <div><b>Protected equipment:<\/b> Hot water generator or steam-to-water heater<\/div>\r\n          <div><b>Medium:<\/b> Hot water, steam and condensate<\/div>\r\n          <div><b>Design pressure:<\/b> 10 barg<\/div>\r\n          <div><b>Set pressure:<\/b> Below protected water-side design limit<\/div>\r\n          <div><b>Relieving temperature:<\/b> 120\u2013180\u00b0C<\/div>\r\n          <div><b>Relief cause:<\/b> Steam control failure, tube leak or blocked outlet<\/div>\r\n          <div><b>Discharge:<\/b> Safe drain or hot water relief header<\/div>\r\n          <div><b>Key review:<\/b> Flashing, scalding risk, thermal expansion and hot discharge routing<\/div>\r\n        <\/div>\r\n        <p>\r\n          Hot water relief can flash when pressure drops. Discharge piping should be routed to avoid scalding hazards, water hammer and unsafe release near operators.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-ht-section\">\r\n    <div class=\"zobai-ht-eyebrow\">Service Data Matrix<\/div>\r\n    <h2 class=\"zobai-ht-title\">High Temperature Safety Valve Data Matrix<\/h2>\r\n\r\n    <div class=\"zobai-ht-table-wrap\">\r\n      <table class=\"zobai-ht-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>High Temperature Service<\/th>\r\n            <th>Typical Medium<\/th>\r\n            <th>Common Relief Cause<\/th>\r\n            <th>Required Engineering Check<\/th>\r\n            <th>Recommended Valve Review<\/th>\r\n            <th>Risk if Missed<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>Superheated steam<\/td>\r\n            <td>Dry steam, saturated steam, superheated steam<\/td>\r\n            <td>Boiler firing upset, blocked outlet, pressure control failure<\/td>\r\n            <td>Steam capacity, superheat temperature, blowdown, lifting lever and outlet force<\/td>\r\n            <td>Steam safety valve with suitable high-temperature body, trim and gasket<\/td>\r\n            <td>Capacity shortfall, leakage, noise or unsafe steam discharge<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Thermal oil system<\/td>\r\n            <td>Heat transfer oil, hot hydrocarbon liquid<\/td>\r\n            <td>Pump deadhead, blocked outlet, thermal expansion<\/td>\r\n            <td>Oil properties, return pressure, degradation, fire risk and seat tightness<\/td>\r\n            <td>High-temperature liquid relief valve with compatible trim and safe return path<\/td>\r\n            <td>Hot oil leakage, fire risk or line overpressure<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Reboiler \/ vaporizer<\/td>\r\n            <td>Hydrocarbon vapor, solvent vapor, flashing liquid<\/td>\r\n            <td>Blocked vapor outlet, excessive heat input, fire case<\/td>\r\n            <td>Heat duty, vapor generation, two-phase relief and flare back pressure<\/td>\r\n            <td>PSV or rupture disc combination depending on fouling and phase behavior<\/td>\r\n            <td>Undersized relief or unstable two-phase discharge<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>High temperature reactor<\/td>\r\n            <td>Solvent vapor, reaction gas, nitrogen, two-phase mixture<\/td>\r\n            <td>Exothermic reaction, cooling failure, blocked vent<\/td>\r\n            <td>Reaction relief data, fouling, toxicity, corrosion and discharge treatment<\/td>\r\n            <td>High-temperature PSV or rupture disc plus PSV for fouling\/corrosive service<\/td>\r\n            <td>Toxic release, plugged relief path or inadequate capacity<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Hot gas header<\/td>\r\n            <td>Hot process gas, flue gas, hydrocarbon vapor<\/td>\r\n            <td>Blocked outlet, control failure, thermal expansion<\/td>\r\n            <td>Gas temperature, oxidation, thermal stress, outlet expansion and noise<\/td>\r\n            <td>Metal-seated high-temperature gas PSV with suitable body and trim<\/td>\r\n            <td>Seat damage, oxidation, leakage or outlet pipe failure<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Hot water \/ condensate<\/td>\r\n            <td>Hot water, condensate, wet steam<\/td>\r\n            <td>Steam control failure, tube leak, trapped water expansion<\/td>\r\n            <td>Flashing, scalding risk, drain routing and water hammer<\/td>\r\n            <td>Hot water or steam relief valve with safe discharge arrangement<\/td>\r\n            <td>Scalding hazard, flashing discharge or piping damage<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-ht-section zobai-ht-section-soft\">\r\n    <div class=\"zobai-ht-eyebrow\">Selection Framework<\/div>\r\n    <h2 class=\"zobai-ht-title\">How to Specify a High Temperature Safety Valve Correctly<\/h2>\r\n\r\n    <div class=\"zobai-ht-grid\">\r\n      <div class=\"zobai-ht-card zobai-ht-span-6\">\r\n        <h3>1. Confirm relieving temperature, not only operating temperature<\/h3>\r\n        <p>\r\n          The valve should be selected from the maximum credible relieving temperature. Steam superheat, hot oil upset, reactor runaway, fire exposure, blocked vapor outlet and thermal expansion can create a higher temperature than normal operation.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-6\">\r\n        <h3>2. Select materials for strength at temperature<\/h3>\r\n        <p>\r\n          Body, bonnet, trim, spring, bolting, gasket and packing materials should be checked against pressure and temperature. Carbon steel, alloy steel, stainless steel and special alloys should be selected from the actual service and project code.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-6\">\r\n        <h3>3. Review seat design and leakage expectation<\/h3>\r\n        <p>\r\n          High temperature service often requires metal seats, graphite gaskets and high-temperature packing. Soft seats may be unsuitable where temperature exceeds their service limit or where thermal cycling can damage sealing surfaces.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-6\">\r\n        <h3>4. Check phase behavior and required capacity<\/h3>\r\n        <p>\r\n          High temperature relief may be steam, hot gas, vapor, liquid, flashing liquid or two-phase mixture. Required capacity should be based on the governing relief case, not normal process flow.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-6\">\r\n        <h3>5. Review outlet reaction force and back pressure<\/h3>\r\n        <p>\r\n          High temperature relief can create large reaction forces, noise and high outlet pipe stress. Discharge piping, silencer, flare header, scrubber or vent stack back pressure must be included in valve selection.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-6\">\r\n        <h3>6. Confirm installation, insulation and maintenance access<\/h3>\r\n        <p>\r\n          High temperature valves need clearance for lifting lever, cap removal, testing, bonnet cooling, insulation breaks and safe access. Nearby instruments, cables and operators should be protected from hot discharge and radiant heat.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-ht-section\">\r\n    <div class=\"zobai-ht-eyebrow\">Installation & Discharge<\/div>\r\n    <h2 class=\"zobai-ht-title\">High Temperature Safety Valves Must Be Reviewed With Outlet Piping, Insulation and Safe Discharge<\/h2>\r\n\r\n    <div class=\"zobai-ht-grid\">\r\n      <div class=\"zobai-ht-card zobai-ht-span-7\">\r\n        <h3>Why installation is critical in high temperature PSV service<\/h3>\r\n        <p>\r\n          High temperature relief can create thermal expansion, outlet reaction force, vibration, noise, flash steam, hot liquid discharge and severe surface temperature. A correctly sized valve can still fail in service if the inlet pipe is overstressed, the outlet pipe is unsupported, insulation blocks inspection, or discharge is routed toward personnel or equipment.\r\n        <\/p>\r\n        <p>\r\n          Installation should review inlet pressure loss, valve verticality, discharge support, pipe expansion, drains, silencers, vent stacks, flare back pressure, thermal insulation, bonnet temperature, lifting lever access, maintenance clearance and safe access for calibration or removal.\r\n        <\/p>\r\n        <div class=\"zobai-ht-chip-row\">\r\n          <span class=\"zobai-ht-chip\">Relieving Temperature<\/span>\r\n          <span class=\"zobai-ht-chip\">Metal Seat<\/span>\r\n          <span class=\"zobai-ht-chip\">Graphite Gasket<\/span>\r\n          <span class=\"zobai-ht-chip\">Outlet Reaction Force<\/span>\r\n          <span class=\"zobai-ht-chip\">Thermal Expansion<\/span>\r\n          <span class=\"zobai-ht-chip\">Safe Discharge<\/span>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-5\">\r\n        <h3>Field installation checks<\/h3>\r\n        <ul class=\"zobai-ht-list\">\r\n          <li>Confirm set pressure, relieving temperature and pressure-temperature rating.<\/li>\r\n          <li>Keep inlet pressure loss within the project design limit.<\/li>\r\n          <li>Support outlet piping without loading the valve body or equipment nozzle.<\/li>\r\n          <li>Provide drainage for condensate, flashing liquid and rainwater in discharge piping.<\/li>\r\n          <li>Check thermal expansion, insulation clearance and bonnet temperature exposure.<\/li>\r\n          <li>Route steam, hot gas, hot liquid and toxic vapor to approved safe destinations.<\/li>\r\n          <li>Provide safe access for testing, calibration, lifting lever operation and valve replacement.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-ht-section zobai-ht-section-soft\">\r\n    <div class=\"zobai-ht-eyebrow\">Standards & Documentation<\/div>\r\n    <h2 class=\"zobai-ht-title\">Standards and Documents to Confirm Before Ordering<\/h2>\r\n\r\n    <div class=\"zobai-ht-grid\">\r\n      <div class=\"zobai-ht-card zobai-ht-span-6\">\r\n        <h3>Common high temperature references<\/h3>\r\n        <p>\r\n          High temperature safety valve specifications may reference ASME, API, ISO, EN, GB, local boiler and pressure equipment rules, owner specifications and project piping classes. The applicable design basis should be confirmed before quotation.\r\n        <\/p>\r\n        <ul class=\"zobai-ht-list\">\r\n          <li><a href=\"\/standards\/asme-section-i\/\">ASME BPVC Section I<\/a> where power boiler or boiler-connected steam equipment is part of the project scope.<\/li>\r\n          <li><a href=\"\/standards\/asme-section-viii\/\">ASME BPVC Section VIII<\/a> where reactors, separators, receivers, reboilers or vessels are pressure vessels.<\/li>\r\n          <li><a href=\"\/standards\/asme-b31-3\/\">ASME B31.3<\/a> where connected process piping, hot oil piping or steam skid piping is specified under process piping rules.<\/li>\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 in process facilities.<\/li>\r\n          <li><a href=\"\/standards\/api-526\/\">API 526<\/a> when flanged steel pressure relief valve dimensions and pressure classes are specified.<\/li>\r\n          <li><a href=\"\/standards\/api-527\/\">API 527<\/a> when seat tightness testing is required by specification.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-6\">\r\n        <h3>Typical high temperature document package<\/h3>\r\n        <p>\r\n          Documentation should be agreed before manufacturing, especially for steam systems, thermal oil systems, reactors, refinery service, heat exchangers, hot gas packages and export projects.\r\n        <\/p>\r\n        <ul class=\"zobai-ht-list\">\r\n          <li>Technical datasheet with tag number, model, size, orifice, set pressure and connection.<\/li>\r\n          <li>Sizing calculation or certified relieving capacity confirmation.<\/li>\r\n          <li>Relieving temperature basis and selected pressure-temperature rating.<\/li>\r\n          <li>Set pressure calibration certificate.<\/li>\r\n          <li>Pressure test report and seat tightness test report when required.<\/li>\r\n          <li>Material certificate for body, bonnet, trim, spring, bolting and pressure-retaining parts.<\/li>\r\n          <li>Special gasket, packing, graphite, alloy, high-temperature coating or cleaning record when specified.<\/li>\r\n          <li>General arrangement drawing with weight, orientation, discharge direction and maintenance clearance.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-ht-section\">\r\n    <div class=\"zobai-ht-eyebrow\">RFQ Checklist<\/div>\r\n    <h2 class=\"zobai-ht-title\">High Temperature Safety Valve RFQ Data Checklist<\/h2>\r\n\r\n    <div class=\"zobai-ht-table-wrap\">\r\n      <table class=\"zobai-ht-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 pressure boundary, code basis and set pressure limit.<\/td>\r\n            <td>Steam header, boiler, reactor, reboiler, hot oil heater, heat exchanger, skid<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>MAWP \/ design pressure<\/td>\r\n            <td>Defines the maximum pressure the valve must protect.<\/td>\r\n            <td>10 barg, 16 barg, 42 barg, 100 barg, Class 300 piping<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Set pressure<\/td>\r\n            <td>Defines valve opening pressure.<\/td>\r\n            <td>9.5 barg, 15 barg, 42 barg, 600 psi<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Relieving temperature<\/td>\r\n            <td>Controls material, spring, gasket, seat and pressure-temperature rating.<\/td>\r\n            <td>180\u00b0C, 280\u00b0C, 320\u00b0C, 420\u00b0C, 520\u00b0C<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Relief scenario<\/td>\r\n            <td>Determines required capacity and phase behavior.<\/td>\r\n            <td>Steam control failure, blocked outlet, pump deadhead, thermal expansion, fire case<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Medium and phase<\/td>\r\n            <td>Affects sizing, material, outlet piping and discharge safety.<\/td>\r\n            <td>Steam, thermal oil, hot water, hot gas, hydrocarbon vapor, flashing liquid, two-phase flow<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Required relieving capacity<\/td>\r\n            <td>Confirms whether the valve can protect the system.<\/td>\r\n            <td>kg\/h, t\/h, Nm\u00b3\/h, SCFM, L\/min, GPM, boiler output, pump curve<\/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 pressure, maximum operating pressure, cycling pressure<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Back pressure and discharge route<\/td>\r\n            <td>Influences capacity, stability and valve configuration.<\/td>\r\n            <td>Atmospheric vent, steam silencer, flare header, scrubber, return tank, closed drain<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Material \/ high temperature parts<\/td>\r\n            <td>Prevents creep, corrosion, seat damage and gasket failure.<\/td>\r\n            <td>WCB, WC6, WC9, CF8M, F11, F22, stainless trim, graphite gasket, metal seat<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Connection and rating<\/td>\r\n            <td>Ensures mechanical compatibility at pressure and temperature.<\/td>\r\n            <td>RF flange, RTJ, welded end, NPT, Class 150\u20132500, PN16\u2013PN160<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Required documents<\/td>\r\n            <td>Avoids inspection, FAT, shipment and commissioning delays.<\/td>\r\n            <td>Datasheet, drawing, MTC, sizing report, calibration report, pressure test, seat test<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p class=\"zobai-ht-note\">\r\n      Final selection must be confirmed by protected equipment datasheet, relieving temperature, process conditions, applicable code, verified sizing calculation, manufacturer capacity data and engineering review.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-ht-section zobai-ht-section-soft\">\r\n    <div class=\"zobai-ht-eyebrow\">Selection Errors<\/div>\r\n    <h2 class=\"zobai-ht-title\">Common High Temperature Safety Valve Selection Mistakes<\/h2>\r\n\r\n    <div class=\"zobai-ht-grid\">\r\n      <div class=\"zobai-ht-card zobai-ht-span-4\">\r\n        <h3>Using normal temperature instead of relieving temperature<\/h3>\r\n        <p>\r\n          The valve may see higher temperature during blocked outlet, fire case, cooling failure or exothermic reaction. Material and gasket selection should use the relieving condition.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-4\">\r\n        <h3>Choosing soft seats for unsuitable temperature<\/h3>\r\n        <p>\r\n          Soft seats can lose sealing performance when temperature exceeds their service limit. Metal seat and graphite sealing parts are often reviewed for high temperature duty.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-4\">\r\n        <h3>Ignoring spring and bonnet temperature<\/h3>\r\n        <p>\r\n          High ambient or process heat can affect spring behavior and long-term set pressure stability. Bonnet design, insulation and heat exposure should be checked.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-4\">\r\n        <h3>Underestimating outlet reaction force<\/h3>\r\n        <p>\r\n          Steam and hot gas relief can create strong reaction loads. Poor outlet support can damage the valve, nozzle, skid frame or discharge piping.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-4\">\r\n        <h3>Ignoring flashing and two-phase discharge<\/h3>\r\n        <p>\r\n          Hot liquid may flash when pressure drops. Reboilers, reactors and hot water systems should be reviewed for vapor, liquid or two-phase relief behavior.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-card zobai-ht-span-4\">\r\n        <h3>Insulating the valve incorrectly<\/h3>\r\n        <p>\r\n          Insulation can block nameplates, levers, drains or maintenance access. It can also trap heat around the spring or bonnet if not planned correctly.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-ht-section\">\r\n    <div class=\"zobai-ht-eyebrow\">Related Engineering Resources<\/div>\r\n    <h2 class=\"zobai-ht-title\">Continue Your High Temperature PSV Selection Review<\/h2>\r\n    <p class=\"zobai-ht-lead\">\r\n      These related pages help move from high temperature application requirements to detailed valve type selection, sizing, steam service review, thermal relief and document preparation.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-ht-link-grid\">\r\n      <a class=\"zobai-ht-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-ht-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-ht-link-card\" href=\"\/medium\/steam\/\">\r\n        <strong>Steam Safety Valves<\/strong>\r\n        <span>For saturated steam, superheated steam, steam headers, boilers and steam skids.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-ht-link-card\" href=\"\/medium\/thermal-oil\/\">\r\n        <strong>Thermal Oil Safety Valves<\/strong>\r\n        <span>For hot oil heaters, heat transfer skids, expansion tanks and return line relief.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-ht-link-card\" href=\"\/equipment\/boilers-steam\/\">\r\n        <strong>Boilers and Steam Systems<\/strong>\r\n        <span>For boiler safety valves, steam drums, superheaters, HRSG systems and steam relief documents.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-ht-link-card\" href=\"\/equipment\/reactors\/\">\r\n        <strong>Reactor Safety Valves<\/strong>\r\n        <span>For exothermic reactions, blocked vents, high-temperature vapor and two-phase relief.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-ht-link-card\" href=\"\/equipment\/heat-exchangers\/\">\r\n        <strong>Heat Exchanger Safety Valves<\/strong>\r\n        <span>For reboilers, vaporizers, tube rupture, thermal expansion and hot discharge review.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-ht-link-card\" href=\"\/applications\/thermal-relief\/\">\r\n        <strong>Thermal Relief Valves<\/strong>\r\n        <span>For blocked-in liquid, hot piping, heat exchangers, thermal oil loops and trapped volumes.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-ht-link-card\" href=\"\/applications\/high-back-pressure\/\">\r\n        <strong>High Back Pressure Service<\/strong>\r\n        <span>For high-temperature PSVs discharging to flare headers, scrubbers, silencers or closed systems.<\/span>\r\n      <\/a>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-ht-section zobai-ht-section-soft\">\r\n    <div class=\"zobai-ht-eyebrow\">FAQ<\/div>\r\n    <h2 class=\"zobai-ht-title\">High Temperature Safety Valve FAQ<\/h2>\r\n\r\n    <div class=\"zobai-ht-accordion\" data-zobai-ht-accordion>\r\n      <div class=\"zobai-ht-acc-item is-open\">\r\n        <button class=\"zobai-ht-acc-btn\" type=\"button\">What is the most important factor when selecting a high temperature safety valve? <span>+<\/span><\/button>\r\n        <div class=\"zobai-ht-acc-body\">\r\n          The most important factors are relieving temperature, set pressure, required capacity, medium phase, material strength at temperature, seat design, gasket selection, back pressure and safe discharge routing.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-acc-item\">\r\n        <button class=\"zobai-ht-acc-btn\" type=\"button\">Can a high temperature PSV use a soft seat? <span>+<\/span><\/button>\r\n        <div class=\"zobai-ht-acc-body\">\r\n          A soft seat can only be used if the material is suitable for the actual relieving temperature and service conditions. Many high temperature steam, hot gas and thermal oil duties require metal seats and high-temperature sealing materials.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-acc-item\">\r\n        <button class=\"zobai-ht-acc-btn\" type=\"button\">What data is required for a high temperature safety valve quotation? <span>+<\/span><\/button>\r\n        <div class=\"zobai-ht-acc-body\">\r\n          Provide protected equipment, MAWP or design pressure, set pressure, relieving temperature, relief scenario, medium and phase, required capacity, operating pressure, back pressure, discharge route, material requirement, connection and documents.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-acc-item\">\r\n        <button class=\"zobai-ht-acc-btn\" type=\"button\">Why is outlet piping important for steam and hot gas relief? <span>+<\/span><\/button>\r\n        <div class=\"zobai-ht-acc-body\">\r\n          Steam and hot gas relief can create high velocity, noise, thermal expansion and reaction force. Outlet piping must be supported, drained and routed to a safe location while keeping back pressure within the valve application limit.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-acc-item\">\r\n        <button class=\"zobai-ht-acc-btn\" type=\"button\">When should two-phase relief be reviewed in high temperature service? <span>+<\/span><\/button>\r\n        <div class=\"zobai-ht-acc-body\">\r\n          Two-phase relief should be reviewed when hot liquid can flash, boil, foam or carry liquid into the relief path. This is common in reboilers, reactors, hot water systems and some thermal oil or solvent processes.\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-ht-section\">\r\n    <div class=\"zobai-ht-rfq\">\r\n      <div>\r\n        <div class=\"zobai-ht-eyebrow\">Engineering RFQ Support<\/div>\r\n        <h2>Prepare a Complete High Temperature PSV Datasheet Before Quotation<\/h2>\r\n        <p>\r\n          Send the protected equipment datasheet, MAWP or design pressure, set pressure, relieving temperature, operating pressure, relief scenario, medium and phase, required capacity, back pressure, discharge route, connection rating, material requirement, seat requirement and required documents. A complete datasheet helps avoid unsafe assumptions and speeds up engineering review.\r\n        <\/p>\r\n        <div class=\"zobai-ht-btn-row\">\r\n          <a class=\"zobai-ht-btn zobai-ht-btn-primary\" href=\"\/contact\/\">Request Engineering Quote<\/a>\r\n          <a class=\"zobai-ht-btn zobai-ht-btn-secondary\" href=\"\/ask-an-engineer\/\">Ask an Engineer<\/a>\r\n          <a class=\"zobai-ht-btn zobai-ht-btn-secondary\" href=\"\/catalog-pdf\/\">Download Catalog PDF<\/a>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-ht-rfq-box\">\r\n        <h3>Minimum RFQ data<\/h3>\r\n        <div class=\"zobai-ht-rfq-grid\">\r\n          <div class=\"zobai-ht-rfq-item\">Protected Equipment<\/div>\r\n          <div class=\"zobai-ht-rfq-item\">MAWP \/ Design Pressure<\/div>\r\n          <div class=\"zobai-ht-rfq-item\">Set Pressure<\/div>\r\n          <div class=\"zobai-ht-rfq-item\">Relieving Temperature<\/div>\r\n          <div class=\"zobai-ht-rfq-item\">Relief Scenario<\/div>\r\n          <div class=\"zobai-ht-rfq-item\">Medium \/ Phase<\/div>\r\n          <div class=\"zobai-ht-rfq-item\">Required Capacity<\/div>\r\n          <div class=\"zobai-ht-rfq-item\">Back Pressure<\/div>\r\n          <div class=\"zobai-ht-rfq-item\">Discharge Route<\/div>\r\n          <div class=\"zobai-ht-rfq-item\">Material<\/div>\r\n          <div class=\"zobai-ht-rfq-item\">Connection<\/div>\r\n          <div class=\"zobai-ht-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-ht-accordion]');\r\n    accordions.forEach(function (accordion) {\r\n      var items = accordion.querySelectorAll('.zobai-ht-acc-item');\r\n\r\n      items.forEach(function (item) {\r\n        var button = item.querySelector('.zobai-ht-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 high temperature safety valve?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"The most important factors are relieving temperature, set pressure, required capacity, medium phase, material strength at temperature, seat design, gasket selection, back pressure and safe discharge routing.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can a high temperature PSV use a soft seat?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"A soft seat can only be used if the material is suitable for the actual relieving temperature and service conditions. Many high temperature steam, hot gas and thermal oil duties require metal seats and high-temperature sealing materials.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What data is required for a high temperature safety valve quotation?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Provide protected equipment, MAWP or design pressure, set pressure, relieving temperature, relief scenario, medium and phase, required capacity, operating pressure, back pressure, discharge route, material requirement, connection and documents.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Why is outlet piping important for steam and hot gas relief?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Steam and hot gas relief can create high velocity, noise, thermal expansion and reaction force. Outlet piping must be supported, drained and routed to a safe location while keeping back pressure within the valve application limit.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"When should two-phase relief be reviewed in high temperature service?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Two-phase relief should be reviewed when hot liquid can flash, boil, foam or carry liquid into the relief path. This is common in reboilers, reactors, hot water systems and some thermal oil or solvent processes.\"\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-506b204f e-con-full e-flex cmsmasters-block-default e-con e-parent\" data-id=\"506b204f\" 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-4bf29ce4 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=\"4bf29ce4\" 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-6f639243 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"6f639243\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-394b60ac e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"394b60ac\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-277b7cfe 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=\"277b7cfe\" 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-6d740092 elementor-widget__width-initial cmsmasters-block-default cmsmasters-sticky-default elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"6d740092\" 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-2bfb5af9 elementor-widget__width-initial cmsmasters-block-default cmsmasters-sticky-default elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"2bfb5af9\" 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-21ae1ff9 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=\"21ae1ff9\" 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 \u0438\u0437 4\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-56e99985 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"56e99985\" 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-71613811 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"71613811\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-6d130335 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"6d130335\" 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-31e01cf9 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"31e01cf9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-34b0b4e0 cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"34b0b4e0\" 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-417e2713 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"417e2713\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-53db1ca5 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"53db1ca5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-388f24f9 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"388f24f9\" 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-322b7479 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"322b7479\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-69037ae6 cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"69037ae6\" 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\/es\/applications\/high-temperature\/\">\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-32cb647f cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"32cb647f\" 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 \u0438\u0437 4\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1e2ac8e2 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"1e2ac8e2\" 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-74534480 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"74534480\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-2df2b0cd e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"2df2b0cd\" 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-62a6755a e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"62a6755a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7d24006b cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"7d24006b\" 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-27e18db9 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"27e18db9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-140661ca e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"140661ca\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3ddc4785 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"3ddc4785\" 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-73f6f97c e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"73f6f97c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4de1456d cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"4de1456d\" 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\/es\/applications\/high-temperature\/\">\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-79beb184 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"79beb184\" 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 \u0438\u0437 4\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-29516042 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"29516042\" 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-5a2faa0e e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"5a2faa0e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-2d69979c e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"2d69979c\" 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-26cbc5d5 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"26cbc5d5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-197cf788 cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"197cf788\" 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-218556e5 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"218556e5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-64072dab e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"64072dab\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2e5c76b9 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"2e5c76b9\" 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-38c35a73 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"38c35a73\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-15901a9e cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"15901a9e\" 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\/es\/applications\/high-temperature\/\">\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-31803451 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"31803451\" 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 \u0438\u0437 4\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7df46371 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"7df46371\" 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-2407c131 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"2407c131\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-15cb875e e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"15cb875e\" 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-68515456 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"68515456\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4507534b cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"4507534b\" 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-124ce827 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"124ce827\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-2636d940 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"2636d940\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2a311d60 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"2a311d60\" 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-3c264ec3 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"3c264ec3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5e02ece4 cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"5e02ece4\" 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\/es\/applications\/high-temperature\/\">\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-1263bd32 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"1263bd32\" 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=\"\u041d\u0430\u0437\u0430\u0434\">\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=\"\u0414\u0430\u043b\u0435\u0435\">\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 High Temperature Safety Valves for Steam, Thermal Oil, Hot Gas and Process Systems CONTACT SALES High Temperature PSV Service High Temperature Safety Valves for Steam, Thermal Oil, Hot Gas and Process Systems High temperature safety valves protect steam systems, superheated steam headers, boilers, heat recovery systems, thermal oil heaters, hot water generators, reactors, reboilers,&#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-53185","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/zobai.com\/es\/wp-json\/wp\/v2\/pages\/53185","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zobai.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/zobai.com\/es\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/zobai.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zobai.com\/es\/wp-json\/wp\/v2\/comments?post=53185"}],"version-history":[{"count":4,"href":"https:\/\/zobai.com\/es\/wp-json\/wp\/v2\/pages\/53185\/revisions"}],"predecessor-version":[{"id":53189,"href":"https:\/\/zobai.com\/es\/wp-json\/wp\/v2\/pages\/53185\/revisions\/53189"}],"up":[{"embeddable":true,"href":"https:\/\/zobai.com\/es\/wp-json\/wp\/v2\/pages\/52780"}],"wp:attachment":[{"href":"https:\/\/zobai.com\/es\/wp-json\/wp\/v2\/media?parent=53185"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}