{"id":7071,"date":"2026-05-19T12:36:40","date_gmt":"2026-05-19T10:36:40","guid":{"rendered":"https:\/\/www.irua.es\/?page_id=7071"},"modified":"2026-05-19T12:38:39","modified_gmt":"2026-05-19T10:38:39","slug":"vc-series-complementary-air-valves","status":"publish","type":"page","link":"https:\/\/www.irua.es\/en\/vc-series-complementary-air-valves\/","title":{"rendered":"Serie VC V\u00e1lvulas Complementarias"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1430px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 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.94);\n    max-width: 760px;\n  }\n\n  .irua-vc-cta-actions {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 14px;\n    justify-content: flex-end;\n  }\n\n  .irua-vc-cta-btn {\n    border: 1px solid #ffffff;\n    background: #ffffff;\n    color: var(--irua-blue-dark) !important;\n  }\n\n  .irua-serie-vc .irua-vc-summary-intro {\n    display: block !important;\n    margin-bottom: 42px !important;\n    padding-bottom: 0 !important;\n  }\n\n  .irua-serie-vc .irua-vc-summary-grid {\n    display: grid !important;\n    margin-top: 42px !important;\n  }\n\n  @media (max-width: 980px) {\n    .irua-vc-hero-grid,\n    .irua-vc-cta {\n      grid-template-columns: 1fr;\n    }\n\n    .irua-vc-summary-card {\n      min-height: auto;\n    }\n\n    .irua-vc-summary-grid,\n    .irua-vc-benefits-grid,\n    .irua-vc-range-grid,\n    .irua-aplicaciones .irua-app-grid {\n      grid-template-columns: repeat(2, minmax(0, 1fr));\n    }\n\n    .irua-vc-solutions-grid {\n      grid-template-columns: 1fr;\n    }\n\n    .irua-vc-cta-actions {\n      justify-content: flex-start;\n    }\n  }\n\n  @media (max-width: 640px) {\n    .irua-vc-card,\n    .irua-vc-cta,\n    .irua-aplicaciones {\n      padding: 22px;\n    }\n\n    .irua-vc-products,\n    .irua-vc-summary-grid,\n    .irua-vc-benefits-grid,\n    .irua-vc-range-grid,\n    .irua-aplicaciones .irua-app-grid,\n    .irua-vc-solution-top {\n      grid-template-columns: 1fr;\n    }\n\n    .irua-vc-solution-media img {\n      height: 140px;\n    }\n\n    .irua-aplicaciones h2 {\n      font-size: 28px;\n    }\n  }\n<\/style>\n\n<div class=\"irua-serie-vc\">\n  <div class=\"irua-vc-breadcrumbs\">\n    <a href=\"https:\/\/www.irua.es\/en\/\">Home<\/a> > <a href=\"https:\/\/www.irua.es\/en\/products\/\">Products<\/a> > <a href=\"https:\/\/www.irua.es\/en\/products\/air-valves\/\">Air valves<\/a> > Series VC\n  <\/div>\n\n  <section class=\"irua-vc-hero-grid\">\n    <div class=\"irua-vc-card\">\n      <p class=\"irua-vc-eyebrow\">Series VC<\/p>\n      <h1>Complementary valves for air valves<\/h1>\n      <p class=\"irua-vc-lede\"><\/p>\n\n      <div class=\"irua-vc-products\">\n        <div class=\"irua-vc-product-card\">\n          <img class=\"lazyload\" decoding=\"async\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271200%27%20height%3D%271200%27%20viewBox%3D%270%200%201200%201200%27%3E%3Crect%20width%3D%271200%27%20height%3D%271200%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/www.irua.es\/wp-content\/uploads\/2026\/03\/Serie-VC.webp\" alt=\"Slow-closing valve\" title=\"\">\n          <strong>Slow-closing valve<\/strong>\n        <\/div>\n\n        <div class=\"irua-vc-product-card\">\n          <img class=\"lazyload\" decoding=\"async\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271200%27%20height%3D%271200%27%20viewBox%3D%270%200%201200%201200%27%3E%3Crect%20width%3D%271200%27%20height%3D%271200%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/www.irua.es\/wp-content\/uploads\/2026\/03\/SerieVC2.webp\" alt=\"Air outlet regulation valve\" title=\"\">\n          <strong>Air outlet regulation valve<\/strong>\n        <\/div>\n      <\/div>\n\n      <p class=\"irua-vc-muted\">IRUA Series VC consists of complementary valves designed to improve the operation and safety of air valves during hydraulic maneuvers in pipelines. On the one hand, the slow-closing valve makes it possible to control closing after air evacuations to avoid phenomena associated with sudden closures in the pipeline. On the other hand, the air outlet regulation valve makes it possible to incorporate an adjustment of the evacuation flow when more precise control of air outlet is required during filling or purging of installations.<\/p>\n\n      <p class=\"irua-vc-muted\" style=\"margin-top: 18px;\">Series VC valves are used as complementary elements to air valves, allowing control of closing speed and optimization of air outlet at points in the network where hydraulic conditions require more adjusted system behavior.<\/p>\n\n      <div class=\"irua-vc-actions\">\n        <a class=\"irua-vc-btn irua-vc-btn-primary\" href=\"https:\/\/www.irua.es\/wp-content\/uploads\/2026\/05\/FT_SerieVC_EN.pdf\">Download technical datasheet<\/a>\n        <a class=\"irua-vc-btn irua-vc-btn-secondary\" href=\"https:\/\/www.irua.es\/en\/contact\/\">Contact IRUA<\/a>\n      <\/div>\n    <\/div>\n\n    <aside class=\"irua-vc-card irua-vc-summary-card\">\n      <h3>Summary<\/h3>\n      <p class=\"irua-vc-summary-intro\">Complementary series for air valves, oriented to slow-closing control in situations of rapid air evacuation and to purge regulation.<\/p>\n\n      <div class=\"irua-vc-summary-grid\">\n        <div class=\"irua-vc-mini-card\">\n          <strong>Auxiliary Solutions<\/strong>\n          <p>The series includes a slow-closing valve and an air outlet regulation valve.<\/p>\n        <\/div>\n\n        <div class=\"irua-vc-mini-card\">\n          <strong>Complementary operation<\/strong>\n          <p>Its installation is carried out at the air valve inlet to improve the safety and hydraulic stability of the assembly.<\/p>\n        <\/div>\n\n        <div class=\"irua-vc-mini-card\">\n          <strong>DN80\u2013DN400 \/ PN10-PN40 \/ #300<\/strong>\n          <p>Manufacturing range of slow-closing valve. Applicable EN \/ ANSI standards.<\/p>\n        <\/div>\n\n        <div class=\"irua-vc-mini-card\">\n          <strong>1\u201d\u2013DN150 \/ PN10\u2013PN25 \/ #150<\/strong>\n          <p>Manufacturing range of air outlet regulation valve. Applicable EN \/ ANSI standards.<\/p>\n        <\/div>\n      <\/div>\n    <\/aside>\n  <\/section>\n\n  <section class=\"irua-vc-section irua-vc-card\">\n    <h2>Two complementary solutions<\/h2>\n    <p class=\"irua-vc-section-intro\">Series VC integrates two lines of complementary valves to improve and protect the behavior of air valve installations in pipelines.<\/p>\n\n    <div class=\"irua-vc-solutions-grid\">\n      <article class=\"irua-vc-solution-card\">\n        <div class=\"irua-vc-solution-top\">\n          <div>\n            <span>VC \/ VCL<\/span>\n            <h3>Slow-closing valve<\/h3>\n          <\/div>\n          <div class=\"irua-vc-solution-media\">\n            <img class=\"lazyload\" decoding=\"async\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271200%27%20height%3D%271200%27%20viewBox%3D%270%200%201200%201200%27%3E%3Crect%20width%3D%271200%27%20height%3D%271200%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/www.irua.es\/wp-content\/uploads\/2026\/03\/Serie-VC.webp\" alt=\"Slow-closing valve\" title=\"\">\n          <\/div>\n        <\/div>\n        <p>Slow-closing valves make it possible to reduce the closing speed of the air valve during pipeline filling.<\/p>\n        <p style=\"margin-top: 14px;\">In this way, sudden closure caused by the air release regime is avoided, reducing the likelihood of water hammer or hydraulic instability in the network.<\/p>\n        <p style=\"margin-top: 14px;\">They are indicated for pumping mains, long pipelines or long-distance locations where the dynamic conditions of pipeline filling may cause sudden closures.<\/p>\n      <\/article>\n\n      <article class=\"irua-vc-solution-card\">\n        <div class=\"irua-vc-solution-top\">\n          <div>\n            <span>VC \/ VRC<\/span>\n            <h3>Air outlet regulation valve<\/h3>\n          <\/div>\n          <div class=\"irua-vc-solution-media\">\n            <img class=\"lazyload\" decoding=\"async\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271200%27%20height%3D%271200%27%20viewBox%3D%270%200%201200%201200%27%3E%3Crect%20width%3D%271200%27%20height%3D%271200%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/www.irua.es\/wp-content\/uploads\/2026\/03\/SerieVC2.webp\" alt=\"Air outlet regulation valve\" title=\"\">\n          <\/div>\n        <\/div>\n        <p>Air outlet regulation valves make it possible to control the air evacuation speed during pipeline filling.<\/p>\n        <p style=\"margin-top: 14px;\">By regulating the evacuated air flow, pipeline filling is carried out in a more progressive and controlled way, reducing the risk of transient hydraulic phenomena.<\/p>\n        <p style=\"margin-top: 14px;\">This type of valve is used mainly in large-diameter pipelines or in installations where precise control of the hydraulic behavior of the system is required.<\/p>\n      <\/article>\n    <\/div>\n  <\/section>\n\n  <section class=\"irua-vc-section irua-vc-card\">\n    <h2>Main benefits<\/h2>\n    <p class=\"irua-vc-section-intro\">Series VC is oriented to improving the behavior of air valve systems where a conventional air valve requires additional support.<\/p>\n\n    <div class=\"irua-vc-benefits-grid\">\n      <div class=\"irua-vc-benefit-card\">\n        <strong>Avoids overpressures<\/strong>\n        <p>Designed to prevent air admission and air expulsion from generating unwanted phenomena.<\/p>\n      <\/div>\n\n      <div class=\"irua-vc-benefit-card\">\n        <strong>Reduction of sudden closures<\/strong>\n        <p>The slow-closing valve reduces closing speed during pipeline filling.<\/p>\n      <\/div>\n\n      <div class=\"irua-vc-benefit-card\">\n        <strong>Control of evacuated air flow<\/strong>\n        <p>The outlet regulation valve allows more progressive and stable control.<\/p>\n      <\/div>\n\n      <div class=\"irua-vc-benefit-card\">\n        <strong>Greater service adjustment range<\/strong>\n        <p>The series allows the hydraulic operation to be adapted to projects or sections of the system.<\/p>\n      <\/div>\n\n      <div class=\"irua-vc-benefit-card\">\n        <strong>Added hydraulic safety<\/strong>\n        <p>Provides an additional degree of protection against demanding hydraulic maneuvers.<\/p>\n      <\/div>\n\n      <div class=\"irua-vc-benefit-card\">\n        <strong>Stable operation in complex networks<\/strong>\n        <p>Applicable in long-distance, large-diameter or highly demanding installations.<\/p>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"irua-vc-section irua-vc-card irua-vc-range-card\">\n    <h2>Manufacturing range<\/h2>\n\n    <div class=\"irua-vc-range-grid\">\n      <div class=\"irua-vc-range-item\">\n        <strong>Slow-closing valve<\/strong>\n        <span>DN80\u2013DN400<\/span>\n        <p>Nominal pressures PN10-PN40 \/ #300. Reference standards EN \/ ANSI.<\/p>\n      <\/div>\n\n      <div class=\"irua-vc-range-item\">\n        <strong>Air outlet regulation valve<\/strong>\n        <span>1\u201d\u2013DN150<\/span>\n        <p>Nominal pressures PN10\u2013PN25 \/ #150. Reference standards EN \/ ANSI.<\/p>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"irua-aplicaciones\">\n    <p class=\"irua-app-kicker\">Applications<\/p>\n    <h2>Products designed for critical applications<\/h2>\n    <p class=\"irua-app-intro\">IRUA air valves are designed to work in demanding hydraulic infrastructures, from water supply networks and pumping stations to desalination plants, mining or industry and power generation.<\/p>\n\n    <div class=\"irua-app-grid\">\n      <div class=\"irua-app-card\">\n        <span class=\"irua-app-icon\">\n          <svg viewBox=\"0 0 24 24\"><path d=\"M4 14h10\"><\/path><path d=\"M14 10v8\"><\/path><path d=\"M14 14h3a3 3 0 0 0 0-6h-1\"><\/path><path d=\"M5 18h4\"><\/path><path d=\"M7 18v3\"><\/path><path d=\"M12 3s3 4 3 6a3 3 0 0 1-6 0c0-2 3-6 3-6z\"><\/path><\/svg>\n        <\/span>\n        <strong>Water supply networks<\/strong>\n      <\/div>\n\n      <div class=\"irua-app-card\">\n        <span class=\"irua-app-icon\">\n          <svg viewBox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"4\"><\/circle><path d=\"M12 2v4\"><\/path><path d=\"M12 18v4\"><\/path><path d=\"M2 12h4\"><\/path><path d=\"M18 12h4\"><\/path><path d=\"M5 5l3 3\"><\/path><path d=\"M16 16l3 3\"><\/path><path d=\"M19 5l-3 3\"><\/path><path d=\"M8 16l-3 3\"><\/path><\/svg>\n        <\/span>\n        <strong>Pumping stations<\/strong>\n      <\/div>\n\n      <div class=\"irua-app-card\">\n        <span class=\"irua-app-icon\">\n          <svg viewBox=\"0 0 24 24\"><path d=\"M3 7h18\"><\/path><path d=\"M6 7v10\"><\/path><path d=\"M10 7v10\"><\/path><path d=\"M14 7v10\"><\/path><path d=\"M18 7v10\"><\/path><path d=\"M3 17h18\"><\/path><path d=\"M4 21c2 0 2-2 4-2s2 2 4 2 2-2 4-2 2 2 4 2\"><\/path><\/svg>\n        <\/span>\n        <strong>Desalination plants<\/strong>\n      <\/div>\n\n      <div class=\"irua-app-card\">\n        <span class=\"irua-app-icon\">\n          <svg viewBox=\"0 0 24 24\"><path d=\"M14 4l6 6\"><\/path><path d=\"M16.5 6.5l-9 9\"><\/path><path d=\"M4 20l4-4\"><\/path><path d=\"M5 13l6 6\"><\/path><path d=\"M18 3l3 3\"><\/path><\/svg>\n        <\/span>\n        <strong>Mining<\/strong>\n      <\/div>\n\n      <div class=\"irua-app-card\">\n        <span class=\"irua-app-icon\">\n          <svg viewBox=\"0 0 24 24\"><path d=\"M12 20v-7\"><\/path><path d=\"M6 20h12\"><\/path><path d=\"M12 13c-3 0-5-2-5-5\"><\/path><path d=\"M12 13c3 0 5-2 5-5\"><\/path><path d=\"M8 8c1.5 1.5 3 2 4 2s2.5-.5 4-2\"><\/path><path d=\"M4 6l2 2\"><\/path><path d=\"M20 6l-2 2\"><\/path><\/svg>\n        <\/span>\n        <strong>Irrigation<\/strong>\n      <\/div>\n\n      <div class=\"irua-app-card\">\n        <span class=\"irua-app-icon\">\n          <svg viewBox=\"0 0 24 24\"><path d=\"M4 15h16\"><\/path><path d=\"M6 11h12\"><\/path><path d=\"M8 7h8\"><\/path><path d=\"M7 15v4\"><\/path><path d=\"M17 15v4\"><\/path><circle cx=\"8\" cy=\"19\" r=\"1\"><\/circle><circle cx=\"12\" cy=\"19\" r=\"1\"><\/circle><circle cx=\"16\" cy=\"19\" r=\"1\"><\/circle><\/svg>\n        <\/span>\n        <strong>Wastewater<\/strong>\n      <\/div>\n\n      <div class=\"irua-app-card\">\n        <span class=\"irua-app-icon\">\n          <svg viewBox=\"0 0 24 24\"><path d=\"M3 21h18\"><\/path><path d=\"M5 21V9l5 3V9l5 3V7h4v14\"><\/path><path d=\"M8 17h1\"><\/path><path d=\"M12 17h1\"><\/path><path d=\"M16 17h1\"><\/path><path d=\"M17 3l-2 4h4l-2 4\"><\/path><\/svg>\n        <\/span>\n        <strong>Industry and power generation.<\/strong>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"irua-vc-cta\">\n    <div>\n      <h2>Need to define which complementary valve best fits your air valve?<\/h2>\n      <p>IRUA\u2019s technical team can help you select the most suitable solution to improve the safety and hydraulic stability of your installation.<\/p>\n    <\/div>\n\n    <div class=\"irua-vc-cta-actions\">\n      <a class=\"irua-vc-cta-btn\" href=\"https:\/\/www.irua.es\/en\/contact\/\">Contact IRUA<\/a>\n    <\/div>\n  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