{"id":7291,"date":"2021-11-08T10:36:16","date_gmt":"2021-11-08T09:36:16","guid":{"rendered":"https:\/\/arca-valve.com\/produkte\/produkte\/dualvent\/"},"modified":"2026-09-17T15:06:16","modified_gmt":"2026-09-17T13:06:16","slug":"dualvent-double-seated-valve","status":"publish","type":"produkte","link":"https:\/\/arca-valve.com\/en\/produkte\/control-valves\/dualvent-double-seated-valve\/","title":{"rendered":"DUALVENT"},"content":{"rendered":"  \n\n                \n  \n\n\n\n  \n  \n\n\n  <section\n    id=\"\"\n    class=\" c-widget--has-space-top-default c-widget--has-space-bottom-default   c-widget c-widget--steps-popup align \"\n    data-block_60c06b4c6e2f0\n    style=\"--bg-color: inherit;--font-color: inherit;--main-color: #fff;\"  >\n\n          <div class=\"o-wrapper\">\n    \n            \n  \n  <div class=\"columns is-mobile is-multiline\">\n\n    \n\n    \n      <div class=\"column is-one-third\">\n\n        <div class=\"c-tease c-tease--step\">\n\n  <div class=\"c-tease__image\">\n\n        \n  <div class=\"c-img c-img--square\">\n    <div class=\"c-img__full u-lazy\" data-background-image=\"https:\/\/arca-valve.com\/wp-content\/uploads\/2021\/09\/251-P1_1631533566.png\" style=\"background-position: 50% 50%;\"><\/div>\n    <div class=\"c-img__placeholder\" style=\"background-image: url(https:\/\/arca-valve.com\/wp-content\/uploads\/2021\/09\/251-P1_1631533566-16x0-c-default.png)\"><\/div>\n  <\/div>\n\n  <\/div>\n\n  <div class=\"c-tease__title u-text-center\">\n    Double-seated valve with parabolic plug\n  <\/div>\n\n  <a data-glightbox=\"description: .modal-306445794; type: content; height: auto; width: 1800px;\" data-gallery=\"1188720566\" class=\"c-tease__link glightbox\"><\/a>\n\n<\/div>\n\n<div hidden style=\"display:none;\" class=\"glightbox-desc modal-306445794\">\n  <div class=\"c-step\">\n  <div class=\"columns is-multiline c-step__columns\">\n\n    <div class=\"column is-full-mobile is-half-tablet c-step__column\">\n      <div class=\"c-step__content\">\n        <h3 class=\"c-step__title\">Double-seated valve with parabolic plug<\/h3>\n        <div class=\"c-step__description\"><p>With this control valve, the medium is distributed to two parabolic plugs and regulated. The proven double-guided parabolic plug design is often used in water applications and impresses with its design, which is both robust and simple. Due to the design, the outer diameters of the two parabolic plugs are almost the same and thus almost pressure-balanced. For the actuating force dimensioning, therefore, not the full plug diameter, but only the resulting annular gap needs to be taken into account and you can manage your control task with smaller actuators.<\/p>\n<\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"column is-full-mobile is-half-tablet c-step__column\">\n      <h3 class=\"c-step__title c-step__title--mobile\">Double-seated valve with parabolic plug<\/h3>\n\n      <div class=\"c-step__image\">\n\n                \n  <div class=\"c-img c-img--square\">\n    <div class=\"c-img__full u-lazy\" data-background-image=\"https:\/\/arca-valve.com\/wp-content\/uploads\/2021\/09\/251-P1_1631533566.png\" style=\"background-position: 50% 50%;\"><\/div>\n    <div class=\"c-img__placeholder\" style=\"background-image: url(https:\/\/arca-valve.com\/wp-content\/uploads\/2021\/09\/251-P1_1631533566-16x0-c-default.png)\"><\/div>\n  <\/div>\n\n      <\/div>\n    <\/div>\n\n  <\/div>\n<\/div>\n<\/div>\n\n      <\/div>\n\n    \n      <div class=\"column is-one-third\">\n\n        <div class=\"c-tease c-tease--step\">\n\n  <div class=\"c-tease__image\">\n\n        \n  <div class=\"c-img c-img--square\">\n    <div class=\"c-img__full u-lazy\" data-background-image=\"https:\/\/arca-valve.com\/wp-content\/uploads\/2021\/09\/283-L1_1631533618.png\" style=\"background-position: 50% 50%;\"><\/div>\n    <div class=\"c-img__placeholder\" style=\"background-image: url(https:\/\/arca-valve.com\/wp-content\/uploads\/2021\/09\/283-L1_1631533618-16x0-c-default.png)\"><\/div>\n  <\/div>\n\n  <\/div>\n\n  <div class=\"c-tease__title u-text-center\">\n    Double-seated valve with perforated plug\n  <\/div>\n\n  <a data-glightbox=\"description: .modal-640815116; type: content; height: auto; width: 1800px;\" data-gallery=\"1188720566\" class=\"c-tease__link glightbox\"><\/a>\n\n<\/div>\n\n<div hidden style=\"display:none;\" class=\"glightbox-desc modal-640815116\">\n  <div class=\"c-step\">\n  <div class=\"columns is-multiline c-step__columns\">\n\n    <div class=\"column is-full-mobile is-half-tablet c-step__column\">\n      <div class=\"c-step__content\">\n        <h3 class=\"c-step__title\">Double-seated valve with perforated plug<\/h3>\n        <div class=\"c-step__description\"><p>As with all ARCA series, the ARCA DUALVENT is also designed using the modular principle in a variety of designs. The double-seated valve offers possibilities up to the nominal pressure PN 160 and covers the temperature range up to 530 \u00b0C. Here we have a double-seated control valve in the high-pressure version with cooling fin bonnet, so that the stuffing box packing is located outside the hot area. For control, perforated plugs are chosen instead of the usual parabolic plugs in order to counteract noise generation. Of course, small actuators are also specified here in order to be able to control high differential pressures.<\/p>\n<\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"column is-full-mobile is-half-tablet c-step__column\">\n      <h3 class=\"c-step__title c-step__title--mobile\">Double-seated valve with perforated plug<\/h3>\n\n      <div class=\"c-step__image\">\n\n                \n  <div class=\"c-img c-img--square\">\n    <div class=\"c-img__full u-lazy\" data-background-image=\"https:\/\/arca-valve.com\/wp-content\/uploads\/2021\/09\/283-L1_1631533618.png\" style=\"background-position: 50% 50%;\"><\/div>\n    <div class=\"c-img__placeholder\" style=\"background-image: url(https:\/\/arca-valve.com\/wp-content\/uploads\/2021\/09\/283-L1_1631533618-16x0-c-default.png)\"><\/div>\n  <\/div>\n\n      <\/div>\n    <\/div>\n\n  <\/div>\n<\/div>\n<\/div>\n\n      <\/div>\n\n    \n      <div class=\"column is-one-third\">\n\n        <div class=\"c-tease c-tease--step\">\n\n  <div class=\"c-tease__image\">\n\n        \n  <div class=\"c-img c-img--square\">\n    <div class=\"c-img__full u-lazy\" data-background-image=\"https:\/\/arca-valve.com\/wp-content\/uploads\/2021\/09\/251-P3_1631533594.png\" style=\"background-position: 50% 50%;\"><\/div>\n    <div class=\"c-img__placeholder\" style=\"background-image: url(https:\/\/arca-valve.com\/wp-content\/uploads\/2021\/09\/251-P3_1631533594-16x0-c-default.png)\"><\/div>\n  <\/div>\n\n  <\/div>\n\n  <div class=\"c-tease__title u-text-center\">\n    Double-seated valve, multi-stage\n  <\/div>\n\n  <a data-glightbox=\"description: .modal-341236543; type: content; height: auto; width: 1800px;\" data-gallery=\"1188720566\" class=\"c-tease__link glightbox\"><\/a>\n\n<\/div>\n\n<div hidden style=\"display:none;\" class=\"glightbox-desc modal-341236543\">\n  <div class=\"c-step\">\n  <div class=\"columns is-multiline c-step__columns\">\n\n    <div class=\"column is-full-mobile is-half-tablet c-step__column\">\n      <div class=\"c-step__content\">\n        <h3 class=\"c-step__title\">Double-seated valve, multi-stage<\/h3>\n        <div class=\"c-step__description\"><p>For higher differential pressures and applications where the cleanliness of the medium cannot necessarily be guaranteed, the ARCA DUALVENT offers the possibility of multi-stage pressure reduction. With this version it is possible, for example, to reduce the medium pressure without cavitation. Due to the design of the double-seated valve, pressure balancing, which tends to stick even with slightly contaminated fluids, is not required. The selection of small actuators is a matter of course for the double-seated control valves.<\/p>\n<\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"column is-full-mobile is-half-tablet c-step__column\">\n      <h3 class=\"c-step__title c-step__title--mobile\">Double-seated valve, multi-stage<\/h3>\n\n      <div class=\"c-step__image\">\n\n                \n  <div class=\"c-img c-img--square\">\n    <div class=\"c-img__full u-lazy\" data-background-image=\"https:\/\/arca-valve.com\/wp-content\/uploads\/2021\/09\/251-P3_1631533594.png\" style=\"background-position: 50% 50%;\"><\/div>\n    <div class=\"c-img__placeholder\" style=\"background-image: url(https:\/\/arca-valve.com\/wp-content\/uploads\/2021\/09\/251-P3_1631533594-16x0-c-default.png)\"><\/div>\n  <\/div>\n\n      <\/div>\n    <\/div>\n\n  <\/div>\n<\/div>\n<\/div>\n\n      <\/div>\n\n    \n  <\/div>\n\n\n          <\/div>\n    \n              <style type=\"text\/css\">\n        [data-block_60c06b4c6e2f0] {\n        }\n      <\/style>\n      <\/section>\n\n  \n\n    \n  \n\n\n\n  \n  \n\n\n  <section\n    id=\"\"\n    class=\"   c-widget c-widget-- \"\n    data-\n    style=\"--bg-color: inherit;--font-color: inherit;--main-color: #fff;\"  >\n\n          <div class=\"o-wrapper\">\n    \n            \n  <div class=\"columns is-centered\">\n    <div class=\"column is-8-desktop\">\n        \n      <\/div>\n  <\/div>\n\n\n          <\/div>\n    \n              <style type=\"text\/css\">\n        [data-] {\n        }\n      <\/style>\n      <\/section>\n\n  \n\n                \n  \n\n\n\n  \n  \n\n\n  <section\n    id=\"\"\n    class=\" c-widget--has-space-top-default c-widget--has-space-bottom-default   c-widget c-widget--key-facts align \"\n    data-block_60c06c106e2f3\n    style=\"--bg-color: inherit;--font-color: inherit;--main-color: #fff;\"  >\n\n    \n            \n  \n<div class=\"c-slider c-slider--keyfacts c-slider--has-navigation c-slider--single-item\" data-swiper-slider>\n  <div class=\"swiper-container swiper-container--main\" data-swiper-options='{\"autoplay\":{\"delay\":3000,\"disableOnInteraction\":false,\"pauseOnMouseEnter\":true},\"spaceBetween\":10,\"loop\":true,\"loopedSlides\":1,\"slidesPerView\":1,\"autoHeight\":true}'>\n    <div class=\"swiper-wrapper\">\n\n      \n      \n        <div class=\"swiper-slide\">\n\n          <div class=\"c-keyfact\">\n                          <div class=\"c-keyfact__label\">Highlights<\/div>\n                                      <div class=\"c-keyfact__text\">Control valve suitable for dirty media<\/div>\n                      <\/div>\n\n        <\/div>\n\n      \n        <div class=\"swiper-slide\">\n\n          <div class=\"c-keyfact\">\n                          <div class=\"c-keyfact__label\">Highlights<\/div>\n                                      <div class=\"c-keyfact__text\">Reduction of actuator forces due to the double-seated design<\/div>\n                      <\/div>\n\n        <\/div>\n\n      \n        <div class=\"swiper-slide\">\n\n          <div class=\"c-keyfact\">\n                          <div class=\"c-keyfact__label\">Highlights<\/div>\n                                      <div class=\"c-keyfact__text\">High flow rate<\/div>\n                      <\/div>\n\n        <\/div>\n\n      \n        <div class=\"swiper-slide\">\n\n          <div class=\"c-keyfact\">\n                          <div class=\"c-keyfact__label\">Highlights<\/div>\n                                      <div class=\"c-keyfact__text\">Multi-stage to avoid cavitation<\/div>\n                      <\/div>\n\n        <\/div>\n\n      \n        <div class=\"swiper-slide\">\n\n          <div class=\"c-keyfact\">\n                          <div class=\"c-keyfact__label\">Highlights<\/div>\n                                      <div class=\"c-keyfact__text\">Flexibility with the ARCA modular system<\/div>\n                      <\/div>\n\n        <\/div>\n\n      \n    \n    <\/div>\n\n    \n    \n      \n      <div class=\"swiper-button-prev\">\n        <svg>\n          <use xlink:href=\"#icon-arrow-left\"><\/use>\n        <\/svg>\n      <\/div>\n\n      \n      <div class=\"swiper-button-next\">\n        <svg>\n          <use xlink:href=\"#icon-arrow-right\"><\/use>\n        <\/svg>\n      <\/div>\n\n      \n    \n    \n        \n  <\/div>\n\n  \n\n<\/div>\n\n\n    \n              <style type=\"text\/css\">\n        [data-block_60c06c106e2f3] {\n        }\n      <\/style>\n      <\/section>\n\n  \n\n    \n  \n\n\n\n  \n  \n\n\n  <section\n    id=\"\"\n    class=\"   c-widget c-widget-- \"\n    data-\n    style=\"--bg-color: inherit;--font-color: inherit;--main-color: #fff;\"  >\n\n          <div class=\"o-wrapper\">\n    \n            \n  <div class=\"columns is-centered\">\n    <div class=\"column is-8-desktop\">\n        \n      <\/div>\n  <\/div>\n\n\n          <\/div>\n    \n              <style type=\"text\/css\">\n        [data-] {\n        }\n      <\/style>\n      <\/section>\n\n  \n\n                \n  \n    \n\n\n  \n  \n\n\n  <section\n    id=\"\"\n    class=\" c-widget--has-space-top-big c-widget--has-space-bottom-default  c-widget--has-gradient  c-widget c-widget--accordion align \"\n    data-block_6ddb55f37a31bd66d389efcb5ab3d57c\n    style=\"--bg-color: inherit;--font-color: #ffffff;--main-color: #fff;\"  >\n\n          <div class=\"o-wrapper\">\n    \n            \n  \n  <div class=\"columns is-centered\">\n    <div class=\"column is-8-desktop\">\n\n              <div class=\"c-accordion__headline\">Frequently Asked Questions \u2013 DUALVENT double-seated valve<\/div>\n      \n      <div class=\"c-accordion\">\n              <div class=\"c-accordion__element\">\n\n          <div class=\"c-accordion__title\" data-houdini-toggle=\"accordion-448457668-1\">What sets the DUALVENT double-seated control valve apart?<\/div>\n          <div class=\"c-accordion__content is-expanded\" data-houdini-group=\"accordion-group-448457668\" id=\"accordion-448457668-1\">\n            <p>The DUALVENT double-seated control valve is a rugged control valve with two seat-plug pairs on a single stem. The two plug diameters are matched so that the flow forces on one plug act in the flow-to-close direction while the other acts in the flow-to-open direction, almost balancing each other. The result is exceptionally low net actuator thrust \u2013 allowing large flow rates and high differential pressures to be handled with a relatively small actuator.<\/p>\n\n          <\/div>\n\n        <\/div>\n              <div class=\"c-accordion__element\">\n\n          <div class=\"c-accordion__title\" data-houdini-toggle=\"accordion-448457668-2\">Which sizes and pressure ratings does DUALVENT offer?<\/div>\n          <div class=\"c-accordion__content\" data-houdini-group=\"accordion-group-448457668\" id=\"accordion-448457668-2\">\n            <p>DUALVENT is offered in two series: Series 250 covers DN 50 to DN 350 at PN 10 to PN 40, while Series 280 is designed for higher pressures and covers DN 40 to DN 250 at PN 63 to PN 160. The permitted fluid temperature range extends from \u201310 \u00b0C to +530 \u00b0C.<\/p>\n\n          <\/div>\n\n        <\/div>\n              <div class=\"c-accordion__element\">\n\n          <div class=\"c-accordion__title\" data-houdini-toggle=\"accordion-448457668-3\">How does the pressure-balancing of the double-seated valve work?<\/div>\n          <div class=\"c-accordion__content\" data-houdini-group=\"accordion-group-448457668\" id=\"accordion-448457668-3\">\n            <p>Both plugs share a common stem and are dimensioned so that the pressure load on the upper plug acts in the flow-to-close direction while the load on the lower plug acts in the flow-to-open direction \u2013 or vice versa. Because the forces oppose each other, only a small net thrust has to be applied by the actuator. This makes it possible to control very high flow rates and differential pressures with significantly smaller actuators, saving installation space, energy and capital cost.<\/p>\n\n          <\/div>\n\n        <\/div>\n              <div class=\"c-accordion__element\">\n\n          <div class=\"c-accordion__title\" data-houdini-toggle=\"accordion-448457668-4\">Which applications is DUALVENT particularly suited for?<\/div>\n          <div class=\"c-accordion__content\" data-houdini-group=\"accordion-group-448457668\" id=\"accordion-448457668-4\">\n            <p>DUALVENT is the preferred choice in rugged industrial applications \u2013 above all in the steel industry (e.g. continuous casting plants or rolling-mill cooling), chemical and petrochemical processes, and wherever dirty media (particulates, scale, coking residues) have to be controlled reliably while delivering high flow rates within a limited actuator size.<\/p>\n\n          <\/div>\n\n        <\/div>\n              <div class=\"c-accordion__element\">\n\n          <div class=\"c-accordion__title\" data-houdini-toggle=\"accordion-448457668-5\">Why is DUALVENT suited for dirty media?<\/div>\n          <div class=\"c-accordion__content\" data-houdini-group=\"accordion-group-448457668\" id=\"accordion-448457668-5\">\n            <p>Unlike single-seated control valves with a pressure balancing system, the double-seated design tolerates larger particles in the medium because it does not require any dynamic sealing elements. The flow geometry tends to flush the internal cavity, and the robust design handles abrasive or coking media noticeably better than conventional single-seated control valves.<\/p>\n\n          <\/div>\n\n        <\/div>\n              <div class=\"c-accordion__element\">\n\n          <div class=\"c-accordion__title\" data-houdini-toggle=\"accordion-448457668-6\">Which plug shapes are available for DUALVENT?<\/div>\n          <div class=\"c-accordion__content\" data-houdini-group=\"accordion-group-448457668\" id=\"accordion-448457668-6\">\n            <p>The DUALVENT can be supplied with classic parabolic plugs, with cage plugs (for noise reduction and cavitation control), and as a multi-stage trim. Multi-stage trims divide the pressure reduction into several controlled steps, effectively avoiding cavitation and the associated shock waves, erosion damage to body and trim and noise emissions.<\/p>\n\n          <\/div>\n\n        <\/div>\n              <div class=\"c-accordion__element\">\n\n          <div class=\"c-accordion__title\" data-houdini-toggle=\"accordion-448457668-7\">Which seat leakage class does the double-seated valve meet?<\/div>\n          <div class=\"c-accordion__content\" data-houdini-group=\"accordion-group-448457668\" id=\"accordion-448457668-7\">\n            <p>By design, double-seated valves typically reach Class III per IEC 60534-4 (0.1 % of Kvs) and in optimized execution also Class IV (0.01 % of Kvs). Although in special designs leakage rate Class VI can be realized, for higher shut-off classes our single-seated control valves (e.g. ECOTROL\u00ae) are the recommended alternative. DUALVENT is deliberately designed for ruggedness and low actuator thrust rather than for bubble-tight shut-off as standard.<\/p>\n\n          <\/div>\n\n        <\/div>\n              <div class=\"c-accordion__element\">\n\n          <div class=\"c-accordion__title\" data-houdini-toggle=\"accordion-448457668-8\">Which materials are available for body and trim?<\/div>\n          <div class=\"c-accordion__content\" data-houdini-group=\"accordion-group-448457668\" id=\"accordion-448457668-8\">\n            <p>The body is supplied \u2013 depending on the duty \u2013 in cast steel (1.0619 \/ A216 WCB), stainless steel (1.4408 \/ A351 CF8M), creep-resistant steel (1.7357 \/ A217 WC6), or low-temperature cast steel (1.6220 \/ A352 LCB\/LCC). Trim materials include hardened stainless steels, stellited sealing edges or special alloys for abrasive media.<\/p>\n\n          <\/div>\n\n        <\/div>\n              <div class=\"c-accordion__element\">\n\n          <div class=\"c-accordion__title\" data-houdini-toggle=\"accordion-448457668-9\">How is the trim protected against abrasive media?<\/div>\n          <div class=\"c-accordion__content\" data-houdini-group=\"accordion-group-448457668\" id=\"accordion-448457668-9\">\n            <p>For abrasive duty, seating surfaces can be stellited or the whole plug contour fully stellited; alternatively, hardened materials such as 1.4112 or special grades are available. The alternative multi-stage cage-plug design distributes the flow energy over many small jets, so that local cavitation or erosion peaks are avoided and service life is significantly extended.<\/p>\n\n          <\/div>\n\n        <\/div>\n              <div class=\"c-accordion__element\">\n\n          <div class=\"c-accordion__title\" data-houdini-toggle=\"accordion-448457668-10\">Which actuators are used?<\/div>\n          <div class=\"c-accordion__content\" data-houdini-group=\"accordion-group-448457668\" id=\"accordion-448457668-10\">\n            <p>Because DUALVENT is pressure-balanced and thus thrust-relieved, smaller actuators are sufficient even for large valves: pneumatic multi-spring actuators (Series 812 ARCAPAQ\u00ae), single-spring actuators (811 UV), or piston actuators (812 DWK \/ 814). Electric and electro-hydraulic actuators are available as an option. Sizing is performed application-specifically with ARCA-VENA.<\/p>\n\n          <\/div>\n\n        <\/div>\n              <div class=\"c-accordion__element\">\n\n          <div class=\"c-accordion__title\" data-houdini-toggle=\"accordion-448457668-11\">What are typical DUALVENT applications in the steel industry?<\/div>\n          <div class=\"c-accordion__content\" data-houdini-group=\"accordion-group-448457668\" id=\"accordion-448457668-11\">\n            <p>DUALVENT is an established workhorse in the steel industry: as a flow control element in rolling-mill cooling and laminar cooling, in mould-cooling and continuous-casting spray nozzles, in anti-surge loops of large compressors and blowers, in blast-furnace auxiliaries, and in water and steam circuits \u2013 wherever high flow rates, dirty media, and easy maintenance are required.<\/p>\n\n          <\/div>\n\n        <\/div>\n              <div class=\"c-accordion__element\">\n\n          <div class=\"c-accordion__title\" data-houdini-toggle=\"accordion-448457668-12\">Which service offerings and certifications are available?<\/div>\n          <div class=\"c-accordion__content\" data-houdini-group=\"accordion-group-448457668\" id=\"accordion-448457668-12\">\n            <p>DUALVENT is designed in accordance with the Pressure Equipment Directive 2014\/68\/EU; the body is engineered to EN 12516-2 \/ ASME B16.34. Optional designs to AD 2000, NACE MR0175 and TA-Luft are available. The full ARCA service portfolio (ARCAlaunch, ARCAcare, ARCAsafe, ARCA24\/7) is in place; sizing is performed with ARCA-VENA, and all documents are available via QR code through ARCAonsite directly at the valve.<\/p>\n\n          <\/div>\n\n        <\/div>\n            <\/div>\n\n    <\/div>\n  <\/div>\n\n\n          <\/div>\n    \n              <style type=\"text\/css\">\n        [data-block_6ddb55f37a31bd66d389efcb5ab3d57c] {\n        }\n      <\/style>\n      <\/section>\n\n  \n\n    \n  \n\n\n\n  \n  \n\n\n  <section\n    id=\"\"\n    class=\"   c-widget c-widget-- \"\n    data-\n    style=\"--bg-color: inherit;--font-color: inherit;--main-color: #fff;\"  >\n\n          <div class=\"o-wrapper\">\n    \n            \n  <div class=\"columns is-centered\">\n    <div class=\"column is-8-desktop\">\n        \n      <\/div>\n  <\/div>\n\n\n          <\/div>\n    \n              <style type=\"text\/css\">\n        [data-] {\n        }\n      <\/style>\n      <\/section>\n\n  \n\n                \n  \n\n\n\n  \n  \n\n\n  <section\n    id=\"\"\n    class=\" c-widget--has-space-top-default c-widget--has-space-bottom-default   c-widget c-widget--text align \"\n    data-block_ba7b91e46f93064d314679f2f5ee0196\n    style=\"--bg-color: inherit;--font-color: inherit;--main-color: #fff;\"  >\n\n          <div class=\"o-wrapper\">\n    \n            \n  <div class=\"columns is-centered\">\n    <div class=\"column is-8-desktop\">\n        <p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What sets the DUALVENT double-seated control valve apart?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The DUALVENT double-seated control valve is a rugged control valve with two seat-plug pairs on a single stem. The two plug diameters are matched so that the flow forces on one plug act in the flow-to-close direction while the other acts in the flow-to-open direction, almost balancing each other. The result is exceptionally low net actuator thrust \u2013 allowing large flow rates and high differential pressures to be handled with a relatively small actuator.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which sizes and pressure ratings does DUALVENT offer?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"DUALVENT is offered in two series: Series 250 covers DN 50 to DN 350 at PN 10 to PN 40, while Series 280 is designed for higher pressures and covers DN 40 to DN 250 at PN 63 to PN 160. The permitted fluid temperature range extends from \u201310 \u00b0C to +530 \u00b0C.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How does the pressure-balancing of the double-seated valve work?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Both plugs share a common stem and are dimensioned so that the pressure load on the upper plug acts in the flow-to-close direction while the load on the lower plug acts in the flow-to-open direction \u2013 or vice versa. Because the forces oppose each other, only a small net thrust has to be applied by the actuator. This makes it possible to control very high flow rates and differential pressures with significantly smaller actuators, saving installation space, energy and capital cost.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which applications is DUALVENT particularly suited for?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"DUALVENT is the preferred choice in rugged industrial applications \u2013 above all in the steel industry (e.g. continuous casting plants or rolling-mill cooling), chemical and petrochemical processes, and wherever dirty media (particulates, scale, coking residues) have to be controlled reliably while delivering high flow rates within a limited actuator size.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why is DUALVENT suited for dirty media?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Unlike single-seated control valves with a pressure balancing system, the double-seated design tolerates larger particles in the medium because it does not require any dynamic sealing elements. The flow geometry tends to flush the internal cavity, and the robust design handles abrasive or coking media noticeably better than conventional single-seated control valves.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which plug shapes are available for DUALVENT?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The DUALVENT can be supplied with classic parabolic plugs, with cage plugs (for noise reduction and cavitation control), and as a multi-stage trim. Multi-stage trims divide the pressure reduction into several controlled steps, effectively avoiding cavitation and the associated shock waves, erosion damage to body and trim and noise emissions.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which seat leakage class does the double-seated valve meet?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"By design, double-seated valves typically reach Class III per IEC 60534-4 (0.1 % of Kvs) and in optimized execution also Class IV (0.01 % of Kvs). Although in special designs leakage rate Class VI can be realized, for higher shut-off classes our single-seated control valves (e.g. ECOTROL\u00ae) are the recommended alternative. DUALVENT is deliberately designed for ruggedness and low actuator thrust rather than for bubble-tight shut-off as standard.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which materials are available for body and trim?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The body is supplied \u2013 depending on the duty \u2013 in cast steel (1.0619 \/ A216 WCB), stainless steel (1.4408 \/ A351 CF8M), creep-resistant steel (1.7357 \/ A217 WC6), or low-temperature cast steel (1.6220 \/ A352 LCB\/LCC). Trim materials include hardened stainless steels, stellited sealing edges or special alloys for abrasive media.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How is the trim protected against abrasive media?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For abrasive duty, seating surfaces can be stellited or the whole plug contour fully stellited; alternatively, hardened materials such as 1.4112 or special grades are available. The alternative multi-stage cage-plug design distributes the flow energy over many small jets, so that local cavitation or erosion peaks are avoided and service life is significantly extended.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which actuators are used?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Because DUALVENT is pressure-balanced and thus thrust-relieved, smaller actuators are sufficient even for large valves: pneumatic multi-spring actuators (Series 812 ARCAPAQ\u00ae), single-spring actuators (811 UV), or piston actuators (812 DWK \/ 814). Electric and electro-hydraulic actuators are available as an option. Sizing is performed application-specifically with ARCA-VENA.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What are typical DUALVENT applications in the steel industry?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"DUALVENT is an established workhorse in the steel industry: as a flow control element in rolling-mill cooling and laminar cooling, in mould-cooling and continuous-casting spray nozzles, in anti-surge loops of large compressors and blowers, in blast-furnace auxiliaries, and in water and steam circuits \u2013 wherever high flow rates, dirty media, and easy maintenance are required.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which service offerings and certifications are available?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"DUALVENT is designed in accordance with the Pressure Equipment Directive 2014\/68\/EU; the body is engineered to EN 12516-2 \/ ASME B16.34. Optional designs to AD 2000, NACE MR0175 and TA-Luft are available. The full ARCA service portfolio (ARCAlaunch, ARCAcare, ARCAsafe, ARCA24\/7) is in place; sizing is performed with ARCA-VENA, and all documents are available via QR code through ARCAonsite directly at the valve.\"\n      }\n    }\n  ]\n}\n<\/script><\/p>\n\n      <\/div>\n  <\/div>\n\n\n          <\/div>\n    \n              <style type=\"text\/css\">\n        [data-block_ba7b91e46f93064d314679f2f5ee0196] {\n        }\n      <\/style>\n      <\/section>\n\n","protected":false},"author":3,"parent":0,"menu_order":5,"template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"produkt-kategorie":[79],"class_list":["post-7291","produkte","type-produkte","status-publish","hentry","produkt-kategorie-control-valves"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DUALVENT double-seated valve for robust applications | ARCA<\/title>\n<meta name=\"description\" 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