{"id":53206,"date":"2026-05-15T09:32:16","date_gmt":"2026-05-15T09:32:16","guid":{"rendered":"https:\/\/zobai.com\/?page_id=53206"},"modified":"2026-05-15T09:33:34","modified_gmt":"2026-05-15T09:33:34","slug":"large-capacity","status":"publish","type":"page","link":"https:\/\/zobai.com\/ru\/applications\/large-capacity\/","title":{"rendered":"\u0411\u043e\u043b\u044c\u0448\u0430\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"53206\" class=\"elementor elementor-53206\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-56c363bb e-con-full e-flex cmsmasters-bg-hide-none cmsmasters-bg-hide-none cmsmasters-block-default e-con e-parent\" data-id=\"56c363bb\" 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-51026a0e e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"51026a0e\" 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-7625e4b4 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=\"7625e4b4\" 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-2afb3624 elementor-widget__width-initial cmsmasters-block-default cmsmasters-sticky-default elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"2afb3624\" 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\">Large Capacity Safety Valves for High Flow Pressure Relief, Flare, Steam and Process Systems<\/h1>\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-771c7794 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"771c7794\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-53b48172 cmsmasters-button-mobile-align-center cmsmasters-icon-arrangement-together cmsmasters-block-default cmsmasters-sticky-default elementor-invisible elementor-widget 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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-1a4adb9b e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"1a4adb9b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-55151e8d e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"55151e8d\" 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-6a7ee248 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=\"6a7ee248\" 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-6c4b4dae e-con-full e-flex cmsmasters-block-default e-con e-parent\" data-id=\"6c4b4dae\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-271c5289 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-html\" data-id=\"271c5289\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<style>\r\n  .zobai-lc-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-dark: #102522;\r\n    --z-radius: 22px;\r\n    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class=\"zobai-lc-page\">\r\n\r\n  <section class=\"zobai-lc-section\">\r\n    <div class=\"zobai-lc-hero-panel\">\r\n      <div class=\"zobai-lc-eyebrow\">Large Capacity PSV Service<\/div>\r\n      <h2>Large Capacity Safety Valves for High Flow Gas, Steam, Vapor, Liquid and Two-Phase Relief<\/h2>\r\n      <p>\r\n        Large capacity safety valves protect pressure vessels, boilers, steam headers, compressors, reactors, heat exchangers, storage tanks, pipelines, flare-connected systems and modular process packages where the required relieving load is high. Correct selection starts with protected equipment MAWP, set pressure, governing relief case, required capacity, medium phase, relieving temperature, allowable overpressure, inlet pressure loss, outlet back pressure, valve orifice, connection rating, reaction force, noise, discharge destination, multiple valve arrangement, material compatibility and required certified capacity documentation.\r\n      <\/p>\r\n\r\n      <div class=\"zobai-lc-kpi\">\r\n        <div class=\"zobai-lc-kpi-item\">\r\n          <strong>Core Applications<\/strong>\r\n          <span>Boilers, compressors, vessels, reactors, flare systems, tanks and process skids<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lc-kpi-item\">\r\n          <strong>Key Relief Cases<\/strong>\r\n          <span>Fire case, blocked outlet, compressor discharge, steam generation and runaway reaction<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lc-kpi-item\">\r\n          <strong>Engineering Focus<\/strong>\r\n          <span>Certified capacity, orifice, inlet loss, back pressure, noise and reaction force<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lc-kpi-item\">\r\n          <strong>RFQ Output<\/strong>\r\n          <span>Datasheet, sizing report, capacity certificate, drawing and test documents<\/span>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lc-section zobai-lc-section-soft\">\r\n    <div class=\"zobai-lc-eyebrow\">Large Capacity Applications<\/div>\r\n    <h2 class=\"zobai-lc-title\">Where Large Capacity Safety Valves Are Used<\/h2>\r\n    <p class=\"zobai-lc-lead\">\r\n      Large capacity PSV service is common when the pressure source is powerful, the protected volume is large, vapor generation is high, or several credible relief cases can create a major discharge load. In these systems, valve sizing, discharge piping and relief header design must be reviewed together.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-lc-grid\">\r\n      <div class=\"zobai-lc-card zobai-lc-span-4\">\r\n        <h3>Boilers and Steam Headers<\/h3>\r\n        <p>\r\n          Used on steam drums, superheaters, main steam headers, HRSG systems and process steam networks. Large steam capacity review should include boiler output, set pressure, accumulation, blowdown, lifting lever, silencer sizing, drainability and outlet reaction force.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-4\">\r\n        <h3>Refinery and Petrochemical Flare Systems<\/h3>\r\n        <p>\r\n          Used on separators, columns, reboilers, reactors, accumulators and flare-connected vessels. Selection should review fire case, blocked outlet, flare header back pressure, simultaneous relief, two-phase risk and discharge reaction force.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-4\">\r\n        <h3>Compressor Discharge and Gas Receivers<\/h3>\r\n        <p>\r\n          Used on air, nitrogen, natural gas, hydrogen, CO\u2082 and process gas compressor packages. Large flow selection should include compressor maximum flow, blocked discharge, pulsation, vibration, receiver MAWP and safe vent or flare routing.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-4\">\r\n        <h3>Reactors and Emergency Relief Systems<\/h3>\r\n        <p>\r\n          Used on chemical reactors, polymerization systems, autoclaves, hydrogenation vessels and batch process plants. Large relief load may come from runaway reaction, gas generation, cooling failure, fire case or blocked vapor outlet.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-4\">\r\n        <h3>Storage Tanks and Low-Pressure Vessels<\/h3>\r\n        <p>\r\n          Used on large tanks, pressurized storage spheres, LPG bullets, vapor recovery systems and blanketed storage vessels. Relief review should include emergency venting, fire exposure, vapor generation, inbreathing\/outbreathing and environmental control.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-4\">\r\n        <h3>High Flow Process Skids and Pipelines<\/h3>\r\n        <p>\r\n          Used on pressure reducing stations, metering skids, utility skids, gas pipelines and liquid transfer systems. Selection should review upstream source pressure, maximum flow, downstream MAWP, noise, reaction force and outlet header capacity.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lc-section\">\r\n    <div class=\"zobai-lc-eyebrow\">Relief Load Analysis<\/div>\r\n    <h2 class=\"zobai-lc-title\">Large Capacity PSV Selection Starts With the Governing Relief Load<\/h2>\r\n    <p class=\"zobai-lc-lead\">\r\n      A large valve is not selected because the nozzle looks large. It is selected because the verified relief case requires high certified capacity. The governing case must be identified before the valve type, orifice, connection and discharge system can be finalized.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-lc-flow\">\r\n      <div class=\"zobai-lc-flow-item\">\r\n        <div class=\"zobai-lc-flow-num\">01<\/div>\r\n        <div>\r\n          <h3>Fire Case Vapor Generation<\/h3>\r\n          <p>\r\n            External fire can vaporize liquid inventory in vessels, reboilers, separators, tanks and LPG systems. Required relief capacity should consider wetted area, fluid properties, relieving pressure, relieving temperature and discharge system capacity.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-flow-item\">\r\n        <div class=\"zobai-lc-flow-num\">02<\/div>\r\n        <div>\r\n          <h3>Blocked Outlet With Large Upstream Flow<\/h3>\r\n          <p>\r\n            A pump, compressor, pipeline or process source can continue feeding the protected equipment while the outlet is blocked. Large capacity sizing should be based on maximum credible inflow, not normal operating flow only.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-flow-item\">\r\n        <div class=\"zobai-lc-flow-num\">03<\/div>\r\n        <div>\r\n          <h3>Compressor Blocked Discharge<\/h3>\r\n          <p>\r\n            Compressor discharge relief can require large gas capacity. Compressor map, maximum flow, molecular weight, discharge temperature, pulsation, receiver volume and discharge route should be reviewed together.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-flow-item\">\r\n        <div class=\"zobai-lc-flow-num\">04<\/div>\r\n        <div>\r\n          <h3>Steam Generation or Boiler Output<\/h3>\r\n          <p>\r\n            Boilers, steam generators and superheated steam systems require reliable high-flow relief. Valve selection should review steam condition, certified capacity, accumulation, blowdown, noise and safe discharge.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-flow-item\">\r\n        <div class=\"zobai-lc-flow-num\">05<\/div>\r\n        <div>\r\n          <h3>Reaction Gas or Runaway Relief<\/h3>\r\n          <p>\r\n            Exothermic reactions, polymerization, decomposition and wrong addition can generate large gas or two-phase relief loads. Reactor relief review should include kinetics, vapor generation, foaming, toxicity and discharge treatment.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-flow-item\">\r\n        <div class=\"zobai-lc-flow-num\">06<\/div>\r\n        <div>\r\n          <h3>Two-Phase or Flashing Relief<\/h3>\r\n          <p>\r\n            Large capacity relief may be gas, vapor, steam, liquid, flashing liquid or two-phase mixture. Phase behavior affects required area, outlet piping, flare capacity, liquid handling and valve stability.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lc-section zobai-lc-section-soft\">\r\n    <div class=\"zobai-lc-eyebrow\">Application Case Data<\/div>\r\n    <h2 class=\"zobai-lc-title\">Large Capacity Safety Valve Application Cases with Typical RFQ Data<\/h2>\r\n    <p class=\"zobai-lc-lead\">\r\n      These cases show how large capacity PSV requirements are commonly described before model selection. Final sizing must be confirmed by process data, protected equipment datasheet, relief calculation, discharge system review and project standard.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-lc-grid\">\r\n      <div class=\"zobai-lc-case zobai-lc-span-6\">\r\n        <div class=\"zobai-lc-case-top\">\r\n          <h3>Case 1: Large Steam Safety Valve for Main Steam Header<\/h3>\r\n          <span class=\"zobai-lc-case-tag\">High Flow Steam<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lc-case-data\">\r\n          <div><b>Protected equipment:<\/b> Main steam header or boiler outlet<\/div>\r\n          <div><b>Medium:<\/b> Saturated or superheated steam<\/div>\r\n          <div><b>Set pressure:<\/b> Header or boiler protection value<\/div>\r\n          <div><b>Relief cause:<\/b> Firing control failure, blocked steam outlet or load rejection<\/div>\r\n          <div><b>Required capacity:<\/b> Boiler output or project steam balance basis<\/div>\r\n          <div><b>Discharge:<\/b> Vent stack or steam silencer<\/div>\r\n          <div><b>Valve review:<\/b> Full-lift steam safety valve with certified capacity<\/div>\r\n          <div><b>Key review:<\/b> Accumulation, blowdown, noise, drainability, outlet reaction force and safe discharge<\/div>\r\n        <\/div>\r\n        <p>\r\n          Large steam valves should be reviewed as part of the full steam discharge system. Outlet piping, drains and silencers must match the certified valve capacity.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-case zobai-lc-span-6\">\r\n        <div class=\"zobai-lc-case-top\">\r\n          <h3>Case 2: Refinery Separator PSV for Fire Case Relief<\/h3>\r\n          <span class=\"zobai-lc-case-tag\">Fire Case<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lc-case-data\">\r\n          <div><b>Protected equipment:<\/b> Hydrocarbon separator or pressure vessel<\/div>\r\n          <div><b>Medium:<\/b> Hydrocarbon vapor, liquid carryover or two-phase mixture<\/div>\r\n          <div><b>Set pressure:<\/b> Vessel MAWP-based value<\/div>\r\n          <div><b>Relief cause:<\/b> External fire exposure<\/div>\r\n          <div><b>Required capacity:<\/b> Fire case vapor generation basis<\/div>\r\n          <div><b>Discharge:<\/b> Flare header or closed relief system<\/div>\r\n          <div><b>Valve review:<\/b> Large-orifice PSV, bellows PSV or pilot solution depending on back pressure<\/div>\r\n          <div><b>Key review:<\/b> Wetted area, fluid properties, liquid carryover, flare back pressure and simultaneous relief<\/div>\r\n        <\/div>\r\n        <p>\r\n          Fire case relief often controls valve size in hydrocarbon service. The valve cannot be finalized without flare header and back pressure review.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-case zobai-lc-span-6\">\r\n        <div class=\"zobai-lc-case-top\">\r\n          <h3>Case 3: Natural Gas Compressor Discharge Large Capacity PSV<\/h3>\r\n          <span class=\"zobai-lc-case-tag\">Compressor Flow<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lc-case-data\">\r\n          <div><b>Protected equipment:<\/b> Compressor discharge header and receiver<\/div>\r\n          <div><b>Medium:<\/b> Natural gas, fuel gas, hydrogen blend or nitrogen<\/div>\r\n          <div><b>Set pressure:<\/b> Receiver or piping MAWP-based value<\/div>\r\n          <div><b>Relief cause:<\/b> Blocked discharge or compressor control failure<\/div>\r\n          <div><b>Required capacity:<\/b> Compressor maximum flow basis<\/div>\r\n          <div><b>Discharge:<\/b> Vent stack, flare header or closed relief system<\/div>\r\n          <div><b>Valve review:<\/b> High-capacity gas PSV or pilot operated safety valve<\/div>\r\n          <div><b>Key review:<\/b> Compressor map, pulsation, vibration, leakage tightness, noise and discharge dispersion<\/div>\r\n        <\/div>\r\n        <p>\r\n          Compressor systems can require very large gas relief capacity. Receiver volume and compressor controls should be reviewed together with the PSV.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-case zobai-lc-span-6\">\r\n        <div class=\"zobai-lc-case-top\">\r\n          <h3>Case 4: Reactor Emergency Relief to Scrubber or Quench Tank<\/h3>\r\n          <span class=\"zobai-lc-case-tag\">Reaction Relief<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lc-case-data\">\r\n          <div><b>Protected equipment:<\/b> Batch reactor or polymerization vessel<\/div>\r\n          <div><b>Medium:<\/b> Solvent vapor, reaction gas, foam or two-phase mixture<\/div>\r\n          <div><b>Set pressure:<\/b> Reactor MAWP-based value<\/div>\r\n          <div><b>Relief cause:<\/b> Runaway reaction, cooling failure or blocked vent<\/div>\r\n          <div><b>Required capacity:<\/b> Reaction relief calculation basis<\/div>\r\n          <div><b>Discharge:<\/b> Scrubber, quench tank, condenser or flare<\/div>\r\n          <div><b>Valve review:<\/b> Large PSV, rupture disc plus PSV or engineered emergency relief system<\/div>\r\n          <div><b>Key review:<\/b> Two-phase flow, fouling, toxicity, discharge treatment and back pressure<\/div>\r\n        <\/div>\r\n        <p>\r\n          Reactor large capacity relief must be based on credible reaction data and discharge treatment capacity. Fouling and two-phase relief can control the final configuration.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-case zobai-lc-span-6\">\r\n        <div class=\"zobai-lc-case-top\">\r\n          <h3>Case 5: LPG Storage Vessel Large Capacity Relief Valve<\/h3>\r\n          <span class=\"zobai-lc-case-tag\">Pressurized Storage<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lc-case-data\">\r\n          <div><b>Protected equipment:<\/b> LPG bullet, sphere or pressurized storage vessel<\/div>\r\n          <div><b>Medium:<\/b> LPG vapor and liquid hydrocarbon<\/div>\r\n          <div><b>Set pressure:<\/b> Storage vessel MAWP-based value<\/div>\r\n          <div><b>Relief cause:<\/b> Fire exposure, blocked outlet or thermal expansion<\/div>\r\n          <div><b>Required capacity:<\/b> Emergency relief or fire case basis<\/div>\r\n          <div><b>Discharge:<\/b> Flare, vent stack or approved safe relief system<\/div>\r\n          <div><b>Valve review:<\/b> Large capacity spring-loaded or pilot operated PSV<\/div>\r\n          <div><b>Key review:<\/b> Fire sizing, vapor generation, multiple valve arrangement, isolation policy and safe discharge<\/div>\r\n        <\/div>\r\n        <p>\r\n          LPG storage relief often uses multiple devices or high-capacity valves. Isolation, testing and discharge routing should be planned before installation.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-case zobai-lc-span-6\">\r\n        <div class=\"zobai-lc-case-top\">\r\n          <h3>Case 6: Pressure Reducing Station Large Capacity Downstream PSV<\/h3>\r\n          <span class=\"zobai-lc-case-tag\">Regulator Failure<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lc-case-data\">\r\n          <div><b>Protected equipment:<\/b> Downstream gas pipeline or skid header<\/div>\r\n          <div><b>Medium:<\/b> Natural gas, nitrogen, hydrogen or fuel gas<\/div>\r\n          <div><b>Upstream pressure:<\/b> Higher-pressure transmission or plant header<\/div>\r\n          <div><b>Set pressure:<\/b> Below downstream MAOP or design pressure<\/div>\r\n          <div><b>Relief cause:<\/b> Regulator failed open or bypass leakage<\/div>\r\n          <div><b>Required capacity:<\/b> Regulator failure flow basis<\/div>\r\n          <div><b>Discharge:<\/b> Vent stack, flare or relief header<\/div>\r\n          <div><b>Key review:<\/b> Noise, gas dispersion, downstream MAOP, pilot suitability and vent back pressure<\/div>\r\n        <\/div>\r\n        <p>\r\n          Regulator failure can require large gas relief capacity even when normal downstream demand is modest. Relief flow should be based on the failed-open case.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lc-section\">\r\n    <div class=\"zobai-lc-eyebrow\">Service Data Matrix<\/div>\r\n    <h2 class=\"zobai-lc-title\">Large Capacity Safety Valve Data Matrix<\/h2>\r\n\r\n    <div class=\"zobai-lc-table-wrap\">\r\n      <table class=\"zobai-lc-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Large Capacity 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>Steam boiler \/ steam header<\/td>\r\n            <td>Saturated steam, superheated steam<\/td>\r\n            <td>Boiler output, blocked outlet, pressure control failure<\/td>\r\n            <td>Steam capacity, accumulation, blowdown, silencer, drains and outlet force<\/td>\r\n            <td>Full-lift steam safety valve with certified capacity<\/td>\r\n            <td>Insufficient steam relief, seat damage, noise or unsafe discharge<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Hydrocarbon vessel fire case<\/td>\r\n            <td>Hydrocarbon vapor, liquid carryover, two-phase mixture<\/td>\r\n            <td>External fire exposure<\/td>\r\n            <td>Wetted area, vapor generation, flare back pressure, liquid carryover and simultaneous relief<\/td>\r\n            <td>Large-orifice PSV, bellows PSV or pilot valve depending on service<\/td>\r\n            <td>Undersized fire relief or overloaded flare header<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Compressor discharge<\/td>\r\n            <td>Air, nitrogen, natural gas, hydrogen, CO\u2082, process gas<\/td>\r\n            <td>Blocked discharge, control failure, recycle failure<\/td>\r\n            <td>Compressor map, gas properties, pulsation, vibration and vent routing<\/td>\r\n            <td>Large gas PSV or pilot operated valve for clean high-flow gas<\/td>\r\n            <td>Receiver overpressure, chatter, noise or unsafe gas release<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Reactor emergency relief<\/td>\r\n            <td>Reaction gas, solvent vapor, foam, two-phase mixture<\/td>\r\n            <td>Runaway reaction, cooling failure, blocked vent<\/td>\r\n            <td>Reaction data, vapor generation, toxicity, fouling, two-phase flow and scrubber capacity<\/td>\r\n            <td>Large PSV, rupture disc plus PSV or engineered emergency relief arrangement<\/td>\r\n            <td>Undersized emergency relief or blocked\/fouled relief path<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Pressurized storage<\/td>\r\n            <td>LPG, ammonia, refrigerant, volatile liquid, vapor space gas<\/td>\r\n            <td>Fire exposure, thermal expansion, blocked outlet<\/td>\r\n            <td>Storage volume, fire case, multiple valves, isolation policy and discharge destination<\/td>\r\n            <td>Multiple large capacity PSVs or pilot operated storage vessel valves<\/td>\r\n            <td>Storage vessel overpressure or unsafe venting<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Pressure reducing station<\/td>\r\n            <td>Natural gas, fuel gas, hydrogen, nitrogen, steam<\/td>\r\n            <td>Regulator failure, bypass leakage, downstream blockage<\/td>\r\n            <td>Failed-open flow, downstream MAOP, noise, dispersion and back pressure<\/td>\r\n            <td>Large gas PSV, pilot operated valve or staged relief arrangement<\/td>\r\n            <td>Downstream overpressure or excessive noise and vent plume risk<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lc-section zobai-lc-section-soft\">\r\n    <div class=\"zobai-lc-eyebrow\">Selection Framework<\/div>\r\n    <h2 class=\"zobai-lc-title\">How to Specify a Large Capacity Safety Valve Correctly<\/h2>\r\n\r\n    <div class=\"zobai-lc-grid\">\r\n      <div class=\"zobai-lc-card zobai-lc-span-6\">\r\n        <h3>1. Define the governing relief case<\/h3>\r\n        <p>\r\n          Large capacity selection must start with the controlling relief case: fire exposure, blocked outlet, compressor discharge, boiler output, regulator failure, reaction gas generation or two-phase relief. The largest credible case controls the required capacity.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-6\">\r\n        <h3>2. Confirm certified capacity and selected orifice<\/h3>\r\n        <p>\r\n          The selected valve must provide certified capacity at the specified set pressure, allowable overpressure, medium phase and relieving temperature. Do not use nominal connection size as a substitute for certified relieving capacity.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-6\">\r\n        <h3>3. Review inlet pressure loss and valve stability<\/h3>\r\n        <p>\r\n          Large relief flow can create high inlet pressure loss. Long inlet lines, small branches, elbows and reducers can cause unstable operation, chatter or reduced capacity. The inlet path should be short and properly sized.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-6\">\r\n        <h3>4. Calculate outlet back pressure and reaction force<\/h3>\r\n        <p>\r\n          High flow discharge can create major outlet pressure drop, vibration, reaction force and noise. Flare headers, vent stacks, scrubbers, silencers and closed systems must be checked before finalizing valve type and outlet size.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-6\">\r\n        <h3>5. Decide whether one large valve or multiple valves are better<\/h3>\r\n        <p>\r\n          Some services use multiple PSVs for staged relief, maintenance flexibility, code compliance or very large required capacity. Multiple valve arrangements should review set pressure sequencing, isolation, testing and discharge header load.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-6\">\r\n        <h3>6. Confirm noise, discharge safety and documents<\/h3>\r\n        <p>\r\n          Large capacity relief can generate high noise and hazardous discharge. RFQ documents should include sizing report, valve datasheet, certified capacity, drawing, material certificates, set pressure calibration and pressure test records.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lc-section\">\r\n    <div class=\"zobai-lc-eyebrow\">Installation & Discharge<\/div>\r\n    <h2 class=\"zobai-lc-title\">Large Capacity PSVs Must Be Reviewed With Inlet Piping, Outlet Piping, Noise and Relief Header Capacity<\/h2>\r\n\r\n    <div class=\"zobai-lc-grid\">\r\n      <div class=\"zobai-lc-card zobai-lc-span-7\">\r\n        <h3>Why large capacity installation controls real performance<\/h3>\r\n        <p>\r\n          A large capacity valve can only protect the system if the inlet and outlet piping allow it to flow. Excessive inlet pressure loss, undersized outlet pipe, high flare header pressure, unsupported discharge piping, liquid pockets, acoustic vibration or blocked silencers can reduce performance and damage equipment.\r\n        <\/p>\r\n        <p>\r\n          Installation should review inlet line size, inlet length, inlet pressure loss, valve verticality, outlet line size, reaction force, pipe support, thermal expansion, flare header hydraulic load, silencer pressure drop, drain points, vent stack location, noise exposure, maintenance access and whether the discharge route can handle the full certified flow.\r\n        <\/p>\r\n        <div class=\"zobai-lc-chip-row\">\r\n          <span class=\"zobai-lc-chip\">High Flow PSV<\/span>\r\n          <span class=\"zobai-lc-chip\">Large Orifice<\/span>\r\n          <span class=\"zobai-lc-chip\">Certified Capacity<\/span>\r\n          <span class=\"zobai-lc-chip\">Inlet Pressure Loss<\/span>\r\n          <span class=\"zobai-lc-chip\">Outlet Reaction Force<\/span>\r\n          <span class=\"zobai-lc-chip\">Flare Capacity<\/span>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-5\">\r\n        <h3>Field installation checks<\/h3>\r\n        <ul class=\"zobai-lc-list\">\r\n          <li>Confirm required capacity is based on the governing relief case.<\/li>\r\n          <li>Keep inlet pressure loss within the project design limit.<\/li>\r\n          <li>Support outlet piping for reaction force, vibration and thermal expansion.<\/li>\r\n          <li>Check flare, scrubber, silencer, vent stack or return system back pressure.<\/li>\r\n          <li>Provide drains where condensate or liquid carryover may accumulate.<\/li>\r\n          <li>Review noise exposure and vent plume location for personnel safety.<\/li>\r\n          <li>Ensure access for lifting, installation, calibration, inspection and valve removal.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lc-section zobai-lc-section-soft\">\r\n    <div class=\"zobai-lc-eyebrow\">Standards & Documentation<\/div>\r\n    <h2 class=\"zobai-lc-title\">Standards and Documents to Confirm Before Ordering<\/h2>\r\n\r\n    <div class=\"zobai-lc-grid\">\r\n      <div class=\"zobai-lc-card zobai-lc-span-6\">\r\n        <h3>Common large capacity PSV references<\/h3>\r\n        <p>\r\n          Large capacity safety valve specifications may reference ASME, API, ISO, EN, GB, local boiler and pressure equipment rules, owner relief system standards and project piping classes. The applicable design basis should be confirmed before quotation.\r\n        <\/p>\r\n        <ul class=\"zobai-lc-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, including flare, fire case and system-level relief cases.<\/li>\r\n          <li><a href=\"\/standards\/api-526\/\">API 526<\/a> when flanged steel pressure relief valve dimensions, pressure classes and orifice designations 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          <li><a href=\"\/standards\/asme-section-i\/\">ASME BPVC Section I<\/a> where boiler and steam generation equipment are part of the project scope.<\/li>\r\n          <li><a href=\"\/standards\/asme-section-viii\/\">ASME BPVC Section VIII<\/a> where protected vessels, receivers, separators, reactors or storage vessels are pressure vessels.<\/li>\r\n          <li><a href=\"\/standards\/asme-b31-3\/\">ASME B31.3<\/a> where connected process piping, relief headers or skid piping are specified under process piping rules.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-6\">\r\n        <h3>Typical large capacity PSV document package<\/h3>\r\n        <p>\r\n          Documentation should be agreed before manufacturing, especially for EPC projects, refinery flare systems, steam systems, compressor skids, reactor emergency relief and export pressure equipment.\r\n        <\/p>\r\n        <ul class=\"zobai-lc-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>Relief case basis, medium properties, relieving temperature and back pressure data.<\/li>\r\n          <li>General arrangement drawing with dimensions, weight, lifting points and discharge orientation.<\/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, nozzle, disc, trim, spring and pressure-retaining parts.<\/li>\r\n          <li>Inspection witness record, nameplate, tag list, packing record and spare parts list when required.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lc-section\">\r\n    <div class=\"zobai-lc-eyebrow\">RFQ Checklist<\/div>\r\n    <h2 class=\"zobai-lc-title\">Large Capacity Safety Valve RFQ Data Checklist<\/h2>\r\n\r\n    <div class=\"zobai-lc-table-wrap\">\r\n      <table class=\"zobai-lc-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>Boiler, steam header, separator, reactor, compressor receiver, LPG vessel, pipeline<\/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 system, 1500 psi<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Set pressure<\/td>\r\n            <td>Defines valve opening pressure and capacity basis.<\/td>\r\n            <td>9.5 barg, 15 barg, 42 barg, 100 barg, 600 psi<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Governing relief scenario<\/td>\r\n            <td>Determines the large relieving load.<\/td>\r\n            <td>Fire case, blocked outlet, compressor discharge, boiler output, regulator failure, runaway reaction<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Required relieving capacity<\/td>\r\n            <td>Confirms the valve can protect the system.<\/td>\r\n            <td>kg\/h, t\/h, Nm\u00b3\/h, SCFM, MMSCFD, L\/min, GPM, boiler output, compressor map<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Medium and phase<\/td>\r\n            <td>Affects sizing, certified capacity, valve type and outlet design.<\/td>\r\n            <td>Steam, natural gas, hydrogen, hydrocarbon vapor, liquid, flashing liquid, two-phase flow<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Relieving temperature<\/td>\r\n            <td>Affects material, capacity, gasket, spring and trim selection.<\/td>\r\n            <td>-46\u00b0C, ambient, 120\u00b0C, 250\u00b0C, 420\u00b0C, 520\u00b0C<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Allowable overpressure \/ accumulation<\/td>\r\n            <td>Defines sizing basis and code compliance.<\/td>\r\n            <td>Project-specific allowable overpressure or accumulation value<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Back pressure and discharge route<\/td>\r\n            <td>Controls capacity correction, stability and valve configuration.<\/td>\r\n            <td>Atmospheric vent, steam silencer, flare header, scrubber, closed vent, return line<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Inlet and outlet piping data<\/td>\r\n            <td>Required for pressure loss, reaction force and installation review.<\/td>\r\n            <td>Pipe size, length, elbows, reducers, header pressure, silencer loss, flare data<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Valve arrangement<\/td>\r\n            <td>Determines whether one large valve or multiple valves are needed.<\/td>\r\n            <td>Single PSV, dual PSV, staged relief, duty\/standby, multiple safety valves<\/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, sizing report, MTC, 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-lc-note\">\r\n      Final selection must be confirmed by protected equipment datasheet, governing relief case, required capacity, medium properties, applicable standard, back pressure calculation, certified valve capacity and engineering review.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lc-section zobai-lc-section-soft\">\r\n    <div class=\"zobai-lc-eyebrow\">Selection Errors<\/div>\r\n    <h2 class=\"zobai-lc-title\">Common Large Capacity Safety Valve Selection Mistakes<\/h2>\r\n\r\n    <div class=\"zobai-lc-grid\">\r\n      <div class=\"zobai-lc-card zobai-lc-span-4\">\r\n        <h3>Buying by connection size only<\/h3>\r\n        <p>\r\n          A large inlet and outlet connection does not guarantee enough certified capacity. The selected orifice and certified flow must match the governing relief case.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-4\">\r\n        <h3>Using normal flow instead of relief flow<\/h3>\r\n        <p>\r\n          Fire case, compressor blocked discharge, regulator failure or reaction relief can be much larger than normal operating flow. Relief capacity must be calculated from the credible upset case.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-4\">\r\n        <h3>Ignoring inlet pressure loss<\/h3>\r\n        <p>\r\n          High flow through a poor inlet arrangement can create instability, chatter or capacity reduction. Large valves need careful inlet piping review.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-4\">\r\n        <h3>Underestimating outlet reaction force<\/h3>\r\n        <p>\r\n          Large steam, gas or vapor relief can create strong forces. Unsupported discharge piping can damage the valve, nozzle, vessel or skid frame.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-4\">\r\n        <h3>Forgetting flare or silencer back pressure<\/h3>\r\n        <p>\r\n          Large capacity discharge can overload flare headers, scrubbers or silencers. Back pressure should be reviewed before choosing conventional, bellows or pilot operated design.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-card zobai-lc-span-4\">\r\n        <h3>Ignoring noise and discharge safety<\/h3>\r\n        <p>\r\n          High flow relief can create extreme noise, hot discharge, vapor clouds or toxic releases. Vent location and personnel exposure should be reviewed during design.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lc-section\">\r\n    <div class=\"zobai-lc-eyebrow\">Related Engineering Resources<\/div>\r\n    <h2 class=\"zobai-lc-title\">Continue Your Large Capacity PSV Selection Review<\/h2>\r\n    <p class=\"zobai-lc-lead\">\r\n      These related pages help move from high flow relief requirements to detailed valve type selection, sizing, flare review, steam service review, equipment-specific protection and complete RFQ preparation.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-lc-link-grid\">\r\n      <a class=\"zobai-lc-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-lc-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-lc-link-card\" href=\"\/products\/pilot-operated-safety-valves\/\">\r\n        <strong>Pilot Operated Safety Valves<\/strong>\r\n        <span>For clean gas, high capacity, tight shutoff and selected high back pressure applications.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lc-link-card\" href=\"\/products\/full-lift-safety-valves\/\">\r\n        <strong>Full Lift Safety Valves<\/strong>\r\n        <span>For high capacity steam, gas and process vapor relief where large discharge area is required.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lc-link-card\" href=\"\/applications\/high-back-pressure\/\">\r\n        <strong>High Back Pressure Service<\/strong>\r\n        <span>For large PSVs discharging to flare headers, scrubbers, closed vents and return systems.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lc-link-card\" href=\"\/equipment\/boilers-steam\/\">\r\n        <strong>Boilers and Steam Systems<\/strong>\r\n        <span>For boiler output, steam headers, superheated steam, silencers and high-flow steam relief.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lc-link-card\" href=\"\/equipment\/compressors\/\">\r\n        <strong>Compressor Safety Valves<\/strong>\r\n        <span>For compressor blocked discharge, gas receivers, pulsation, vibration and large gas flow.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lc-link-card\" href=\"\/equipment\/reactors\/\">\r\n        <strong>Reactor Safety Valves<\/strong>\r\n        <span>For emergency relief, runaway reaction, two-phase flow, scrubber discharge and rupture disc combinations.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lc-link-card\" href=\"\/equipment\/pressure-vessels\/\">\r\n        <strong>Pressure Vessel Safety Valves<\/strong>\r\n        <span>For fire case, blocked outlet, vessel MAWP, large orifice valves and certified capacity review.<\/span>\r\n      <\/a>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lc-section zobai-lc-section-soft\">\r\n    <div class=\"zobai-lc-eyebrow\">FAQ<\/div>\r\n    <h2 class=\"zobai-lc-title\">Large Capacity Safety Valve FAQ<\/h2>\r\n\r\n    <div class=\"zobai-lc-accordion\" data-zobai-lc-accordion>\r\n      <div class=\"zobai-lc-acc-item is-open\">\r\n        <button class=\"zobai-lc-acc-btn\" type=\"button\">What makes a safety valve a large capacity safety valve? <span>+<\/span><\/button>\r\n        <div class=\"zobai-lc-acc-body\">\r\n          A large capacity safety valve is selected when the required relieving load is high and the valve must provide certified capacity for a large gas, steam, vapor, liquid or two-phase relief case. The decision should be based on sizing calculation, not connection size alone.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-acc-item\">\r\n        <button class=\"zobai-lc-acc-btn\" type=\"button\">Can one large PSV be replaced by multiple smaller PSVs? <span>+<\/span><\/button>\r\n        <div class=\"zobai-lc-acc-body\">\r\n          Multiple PSVs may be used when allowed by the project code and design basis. The arrangement should review set pressure sequencing, total certified capacity, isolation, maintenance, discharge header load and installation space.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-acc-item\">\r\n        <button class=\"zobai-lc-acc-btn\" type=\"button\">Why is outlet piping important for large capacity PSVs? <span>+<\/span><\/button>\r\n        <div class=\"zobai-lc-acc-body\">\r\n          Large relief flow can create high back pressure, noise, vibration and reaction force. Outlet piping, supports, silencers, flare headers and vent stacks must be checked so the valve can deliver its certified capacity safely.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-acc-item\">\r\n        <button class=\"zobai-lc-acc-btn\" type=\"button\">When should a pilot operated valve be reviewed for large capacity service? <span>+<\/span><\/button>\r\n        <div class=\"zobai-lc-acc-body\">\r\n          A pilot operated valve should be reviewed for clean gas service, high capacity, tight shutoff, high operating pressure margin or selected high back pressure applications. Medium cleanliness, pilot sensing line protection and maintenance requirements must be checked.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-acc-item\">\r\n        <button class=\"zobai-lc-acc-btn\" type=\"button\">What data is required for a large capacity PSV quotation? <span>+<\/span><\/button>\r\n        <div class=\"zobai-lc-acc-body\">\r\n          Provide protected equipment, MAWP, set pressure, governing relief scenario, required capacity, medium and phase, relieving temperature, allowable overpressure, back pressure, inlet and outlet piping data, discharge destination, valve arrangement and required documents.\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lc-section\">\r\n    <div class=\"zobai-lc-rfq\">\r\n      <div>\r\n        <div class=\"zobai-lc-eyebrow\">Engineering RFQ Support<\/div>\r\n        <h2>Prepare a Complete Large Capacity PSV Datasheet Before Quotation<\/h2>\r\n        <p>\r\n          Send the protected equipment datasheet, MAWP or design pressure, set pressure, governing relief scenario, required capacity, medium and phase, relieving temperature, allowable overpressure, inlet piping data, back pressure, discharge route, flare or silencer data, material requirement, connection standard and required documents. A complete datasheet helps confirm certified capacity, stable operation and safe discharge.\r\n        <\/p>\r\n        <div class=\"zobai-lc-btn-row\">\r\n          <a class=\"zobai-lc-btn zobai-lc-btn-primary\" href=\"\/contact\/\">Request Engineering Quote<\/a>\r\n          <a class=\"zobai-lc-btn zobai-lc-btn-secondary\" href=\"\/ask-an-engineer\/\">Ask an Engineer<\/a>\r\n          <a class=\"zobai-lc-btn zobai-lc-btn-secondary\" href=\"\/catalog-pdf\/\">Download Catalog PDF<\/a>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lc-rfq-box\">\r\n        <h3>Minimum RFQ data<\/h3>\r\n        <div class=\"zobai-lc-rfq-grid\">\r\n          <div class=\"zobai-lc-rfq-item\">Protected Equipment<\/div>\r\n          <div class=\"zobai-lc-rfq-item\">MAWP \/ Design Pressure<\/div>\r\n          <div class=\"zobai-lc-rfq-item\">Set Pressure<\/div>\r\n          <div class=\"zobai-lc-rfq-item\">Relief Scenario<\/div>\r\n          <div class=\"zobai-lc-rfq-item\">Required Capacity<\/div>\r\n          <div class=\"zobai-lc-rfq-item\">Medium \/ Phase<\/div>\r\n          <div class=\"zobai-lc-rfq-item\">Temperature<\/div>\r\n          <div class=\"zobai-lc-rfq-item\">Back Pressure<\/div>\r\n          <div class=\"zobai-lc-rfq-item\">Inlet \/ Outlet Data<\/div>\r\n          <div class=\"zobai-lc-rfq-item\">Discharge Route<\/div>\r\n          <div class=\"zobai-lc-rfq-item\">Material<\/div>\r\n          <div class=\"zobai-lc-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-lc-accordion]');\r\n    accordions.forEach(function (accordion) {\r\n      var items = accordion.querySelectorAll('.zobai-lc-acc-item');\r\n\r\n      items.forEach(function (item) {\r\n        var button = item.querySelector('.zobai-lc-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 makes a safety valve a large capacity safety valve?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"A large capacity safety valve is selected when the required relieving load is high and the valve must provide certified capacity for a large gas, steam, vapor, liquid or two-phase relief case. The decision should be based on sizing calculation, not connection size alone.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can one large PSV be replaced by multiple smaller PSVs?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Multiple PSVs may be used when allowed by the project code and design basis. The arrangement should review set pressure sequencing, total certified capacity, isolation, maintenance, discharge header load and installation space.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Why is outlet piping important for large capacity PSVs?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Large relief flow can create high back pressure, noise, vibration and reaction force. 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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-56f5731c 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=\"56f5731c\" 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-1f3d964 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"1f3d964\" 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-f3aecf4 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"f3aecf4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-6e6c6217 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"6e6c6217\" 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-17b4cf5c e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"17b4cf5c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2adf6137 cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"2adf6137\" 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-64fef05e e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"64fef05e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-45817ce1 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"45817ce1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7063a5a5 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"7063a5a5\" 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-57777d2c e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"57777d2c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-168f804f cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"168f804f\" 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\/ru\/applications\/large-capacity\/\">\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-75c65ee5 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"75c65ee5\" 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-4e87f62d e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"4e87f62d\" 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-51f506ae e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"51f506ae\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-2a3f4653 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"2a3f4653\" 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-7a6f330f e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"7a6f330f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-442beed7 cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"442beed7\" 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-734f0f26 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"734f0f26\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-56c53dea e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"56c53dea\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-66ff4aa cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"66ff4aa\" 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-3f57d1f7 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"3f57d1f7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-25dea422 cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"25dea422\" 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\/ru\/applications\/large-capacity\/\">\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-760885b cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"760885b\" 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-6c9c4043 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"6c9c4043\" 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-247e6cf6 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"247e6cf6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-6d54d3e5 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"6d54d3e5\" 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-473460d5 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"473460d5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6ca21702 cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"6ca21702\" 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-61bfac1d e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"61bfac1d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-34486cd5 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"34486cd5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3ab1a83c cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"3ab1a83c\" 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-39c965d4 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"39c965d4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-712a4f90 cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"712a4f90\" 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\/ru\/applications\/large-capacity\/\">\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-378dc327 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"378dc327\" 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-34a846db e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"34a846db\" 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-4a120a29 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"4a120a29\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-1b1460da e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"1b1460da\" 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-174acfde e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"174acfde\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3efdbec6 cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"3efdbec6\" 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-bd555b7 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"bd555b7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-363d35c e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"363d35c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-75335a61 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"75335a61\" 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-3f883164 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"3f883164\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-561cf798 cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"561cf798\" 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\/ru\/applications\/large-capacity\/\">\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-699b3bad cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"699b3bad\" 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 Large Capacity Safety Valves for High Flow Pressure Relief, Flare, Steam and Process Systems CONTACT SALES Large Capacity PSV Service Large Capacity Safety Valves for High Flow Gas, Steam, Vapor, Liquid and Two-Phase Relief Large capacity safety valves protect pressure vessels, boilers, steam headers, compressors, reactors, heat exchangers, storage tanks, pipelines, flare-connected systems and&#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-53206","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/zobai.com\/ru\/wp-json\/wp\/v2\/pages\/53206","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zobai.com\/ru\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/zobai.com\/ru\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/zobai.com\/ru\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zobai.com\/ru\/wp-json\/wp\/v2\/comments?post=53206"}],"version-history":[{"count":4,"href":"https:\/\/zobai.com\/ru\/wp-json\/wp\/v2\/pages\/53206\/revisions"}],"predecessor-version":[{"id":53210,"href":"https:\/\/zobai.com\/ru\/wp-json\/wp\/v2\/pages\/53206\/revisions\/53210"}],"up":[{"embeddable":true,"href":"https:\/\/zobai.com\/ru\/wp-json\/wp\/v2\/pages\/52780"}],"wp:attachment":[{"href":"https:\/\/zobai.com\/ru\/wp-json\/wp\/v2\/media?parent=53206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}