{"id":4974,"date":"2026-05-06T20:00:00","date_gmt":"2026-05-06T12:00:00","guid":{"rendered":"https:\/\/www.aox-actuator.com\/?p=4974"},"modified":"2026-05-29T13:49:20","modified_gmt":"2026-05-29T05:49:20","slug":"top-electric-ventilation-butterfly-valve-manufacturers-china","status":"publish","type":"post","link":"https:\/\/www.aox-actuator.com\/de\/blog\/manufacturer\/top-electric-ventilation-butterfly-valve-manufacturers-china\/","title":{"rendered":"Top 8 Elektro-L\u00fcftungs-Schmetterlingsventilhersteller in China: Lieferantenf\u00fchrer 2026"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.aox-actuator.com\/de\/product-category\/electric-valve\/electric-ventilation-valve\/\" type=\"link\" id=\"https:\/\/www.aox-actuator.com\/product-category\/electric-valve\/electric-ventilation-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">Elektrische L\u00fcftungs-Schmetterlingsventile<\/a> regeln den Luftstrom \u00fcber <a href=\"https:\/\/www.aox-actuator.com\/de\/solutions\/chemical-solution\/\" type=\"link\" id=\"https:\/\/www.aox-actuator.com\/solutions\/chemical-solution\/\" target=\"_blank\" rel=\"noreferrer noopener\">Chemieanlagen<\/a>, Kraftwerke und gro\u00dfe HLK-Systeme. Falsche Spezifikationen \u2013 falsches Aktordrehmoment, falsche IP-Schutzart, falscher Lieferant \u2013 f\u00fchren zu ungeplanten Ausfallzeiten. In Umgebungen mit hohem Gefahrenpotenzial f\u00fchren sie auch zu Compliance-Verst\u00f6\u00dfen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Worauf ist bei einem elektrischen L\u00fcftungs-Schmetterlingsventil zu achten?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">China produziert einen erheblichen Anteil der globalen Versorgung, und die Qualit\u00e4tsspanne reicht von vollst\u00e4ndig ATEX-zertifizierten Baugruppen bis hin zu Produkten, die Zertifizierungen auf einem Datenblatt drucken, ohne die Testprotokolle zur Unterst\u00fctzung. Dieser Leitfaden identifiziert acht glaubw\u00fcrdige <a href=\"https:\/\/www.aox-actuator.com\/de\/china-electric-valve-actuator-supplier-manufacturer\/\" type=\"link\" id=\"https:\/\/www.aox-actuator.com\/china-electric-valve-actuator-supplier-manufacturer\/\" target=\"_blank\" rel=\"noreferrer noopener\">Hersteller von elektrischen L\u00fcftungsventilen in China<\/a>, kartiert ihre tats\u00e4chlichen St\u00e4rken und Schw\u00e4chen und endet mit einer praktischen Checkliste f\u00fcr eine nachvollziehbare Kaufentscheidung.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>COVNA \u2014 Dongguan COVNA Automation Co., Ltd.<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">St\u00e4rke: breiter Katalog von motorisierten und pneumatischen L\u00fcftungsventilen, wettbewerbsf\u00e4hige Preise und solide englischsprachige Unterst\u00fctzung f\u00fcr Standard-Ein\/Aus- und grundlegende Regelanwendungen. Schw\u00e4che: echte Pr\u00e4zisionsregelungsleistung \u2013 enge Hysterese, wiederholbare Positionierung \u00fcber Tausende von Zyklen \u2013 \u00fcberfordert ihre Produktlinie. ATEX-Versionen existieren; fordern Sie immer das vollst\u00e4ndige Zertifikat an, nicht nur das Datenblatt. Beste Eignung: allgemeine industrielle und gewerbliche HLK-Projekte.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Walter \u2014 Suzhou Walter Flow Control Equipment Co., Ltd.<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">St\u00e4rke: Ingenieurgetriebene Entwicklung in der Hydrauliksteuerung, automatischen Entl\u00fcftung und komplexen Flussarchitekturen. Ihre Produkte lassen sich sauber in gr\u00f6\u00dfere Steuerungssysteme integrieren. Schw\u00e4che: Preise \u00fcber dem Commodity-Niveau und l\u00e4ngere Lieferzeiten beg\u00fcnstigen Gro\u00dfauftr\u00e4ge gegen\u00fcber MRO-Eink\u00e4ufen. Beste Eignung: Infrastrukturprojekte in <a href=\"https:\/\/www.aox-actuator.com\/de\/case-study\/aox-actuators-power-brazils-regional-water-infrastructure-upgrade\/\" type=\"link\" id=\"https:\/\/www.aox-actuator.com\/case-study\/aox-actuators-power-brazils-regional-water-infrastructure-upgrade\/\" target=\"_blank\" rel=\"noreferrer noopener\">Wasseraufbereitung<\/a>, Fernw\u00e4rme und kommunalen Systemen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>GenTant \u2014 Yuhuan GenTant Valve Co., Ltd.<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">St\u00e4rke: vertikale Lieferkettenintegration sorgt f\u00fcr konsistente Ma\u00dftoleranzen bei ihrem Kernprodukt \u2013 Winkelventile zur automatischen Entl\u00fcftung. Schw\u00e4che: Der Katalog ist bewusst eng gefasst. Gerade Ventile oder Mehrumdrehungs-Aktuatorkonfigurationen sind nicht ihr Metier. Beste Eignung: Spezifikationen, die Winkelventile zur Entl\u00fcftung in gleichbleibender Qualit\u00e4t mit einer Lieferzeit von 15\u201320 Tagen ben\u00f6tigen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Zhonghai \u2014 Yu Huan Zhonghai Valve Co., Ltd.<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">St\u00e4rke: zuverl\u00e4ssige, kosteng\u00fcnstige Heizk\u00f6rperventile und Entl\u00fcftungsprodukte f\u00fcr den privaten und leichten gewerblichen Heizungsbereich. Schw\u00e4che: Nicht f\u00fcr Prozessdr\u00fccke, Gefahrenbereichsklassifizierungen oder anspruchsvolle industrielle Zyklusanforderungen ausgelegt. Die Anwendung ihrer Produkte au\u00dferhalb der privaten Heizung ist eine Fehlverwendung. Beste Eignung: Installateure f\u00fcr private und leichte gewerbliche Heizungen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Jiangsu Huagong Automatic Control Valve Co., Ltd.<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">St\u00e4rke: die technisch vollst\u00e4ndigste Option auf dieser Liste f\u00fcr schwere Industrieanwendungen. CE-, ATEX- und SIL2-Zertifizierung, Drehmomente bis zu 6.000 Nm und dokumentierte Vertrautheit mit den Qualifizierungsstandards von PetroChina und Sinopec \u2013 die Dokumentation, die Nachqualifizierungskosten bei gro\u00dfen chinesischen NOC-Projekten verhindert. Schw\u00e4che: Die Preise spiegeln diese F\u00e4higkeit wider; nicht wettbewerbsf\u00e4hig f\u00fcr Commodity- oder MRO-Eink\u00e4ufe. Beste Eignung: Petrochemie-, Stromerzeugungs- und LNG-Projekte.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Huibo \u2014 Zhejiang Huibo Valve Technology Co., Ltd.<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">St\u00e4rke: \u00fcber 25 Jahre <a href=\"https:\/\/www.aox-actuator.com\/de\/manufacturing\/\" type=\"link\" id=\"https:\/\/www.aox-actuator.com\/manufacturing\/\" target=\"_blank\" rel=\"noreferrer noopener\">Fertigungserfahrung<\/a> Herstellung von CE-zertifizierten automatischen Messing-Entl\u00fcftungsventilen f\u00fcr HLK-Systeme, mit zuverl\u00e4ssigen Lieferzeiten und gleichbleibender Ma\u00dfhaltigkeit. Schw\u00e4che: Der Katalog wird schnell d\u00fcnn, wenn Anwendungen Edelstahlgeh\u00e4use, hohe Druckstufen oder die Einhaltung von Vorschriften f\u00fcr explosionsgef\u00e4hrdete Bereiche erfordern. Beste Eignung: Auftragnehmer f\u00fcr gewerbliche HLK- und Geb\u00e4udedienstleistungen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>YOY Valve Group Co., Ltd.<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">St\u00e4rke: ATEX-zertifizierte Sicherheits- und Entl\u00fcftungsventile, die speziell f\u00fcr die industrielle Lagerung entwickelt wurden \u2013 eine Anwendung mit hohen Eins\u00e4tzen, die h\u00f6chste Fertigungsanforderungen stellt. Schw\u00e4che: Au\u00dferhalb der Tanksicherheit sinkt die Relevanz von YOY stark ab. Ihre Ingenieurskunst konzentriert sich auf die Anforderungen von Lagersystemen, nicht auf die Pipeline-Steuerung. Beste Eignung: Tanklager, Erd\u00f6llager und Chemikalienlager.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Haoxing \u2014 Zhuhai Haoxing Control System Co., Ltd.<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">St\u00e4rke: Venturi-Ventile und automatisierte L\u00fcftungssysteme nach ISO 14644 f\u00fcr Labore, pharmazeutische Fertigung und Reinr\u00e4ume \u2013 Umgebungen, in denen die Luftstrompr\u00e4zision nicht verhandelbar ist. Schw\u00e4che: Diese Pr\u00e4zision hat ihren Preis, der Haoxing f\u00fcr allgemeine Industrie- oder HLK-Arbeiten unrentabel macht. Beste Eignung: Beschaffung f\u00fcr Pharma-, Halbleiter- und Forschungseinrichtungen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>AOX&nbsp;<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Wo die oben genannten Lieferanten spezialisierte Nischen bedienen, bedient AOX die breite Mitte des Marktes \u2013 allgemeine Industrieautomatisierung, Wasseraufbereitung, Erd\u00f6l und Offshore-Anwendungen. Mit \u00fcber 30 Jahren Fertigungserfahrung, CE-Zertifizierung, 24 Monaten Garantie und werkseitig direkten Preisen, die 20\u201340 % unter vergleichbaren europ\u00e4ischen Anbietern liegen, liefert AOX komplette, werkseitig abgestimmte elektrische Schieberventilanordnungen ohne den Spezialisierungsaufschlag. Der folgende Abschnitt beschreibt detailliert Konstruktion, Spezifikationen und Anwendungen.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Hersteller<\/strong><\/td><td><strong>Zertifizierungen<\/strong><\/td><td><strong>Drehmomentbereich<\/strong><\/td><td><strong>Beste Anwendung<\/strong><\/td><\/tr><tr><td>COVNA<\/td><td>CE, ISO 9001<\/td><td>30\u20131.500 Nm<\/td><td>Allgemeine HLK \/ leichte Industrie<\/td><\/tr><tr><td>Walter<\/td><td>CE, ISO 9001<\/td><td>50\u20133.000 Nm<\/td><td>Hydraulik- und komplexe Str\u00f6mungssysteme<\/td><\/tr><tr><td>GenTant<\/td><td>CE, ISO 9001<\/td><td>30\u2013800 Nm<\/td><td>Winkel-Entl\u00fcftungsventile<\/td><\/tr><tr><td>Zhonghai<\/td><td>ISO 9001<\/td><td>30\u2013500 Nm<\/td><td>Wohnungsbau \/ Heizungssysteme<\/td><\/tr><tr><td>Jiangsu Huagong<\/td><td>CE, ATEX, SIL2<\/td><td>100\u20136.000 Nm<\/td><td>Gro\u00dfe petrochemische\/Energieanlagen<\/td><\/tr><tr><td>Huibo<\/td><td>CE, ISO 9001<\/td><td>30\u20131.000 Nm<\/td><td>HLK-Messingfittings<\/td><\/tr><tr><td>YOY Valve<\/td><td>CE, ATEX, ISO 9001<\/td><td>50\u20132.000 Nm<\/td><td>Tank-Sicherheits-\/Speichersysteme<\/td><\/tr><tr><td>Haoxing<\/td><td>CE, ISO 14644<\/td><td>30\u2013600 Nm<\/td><td>Labore\/Reinr\u00e4ume<\/td><\/tr><tr><td>AOX&nbsp;<\/td><td>CE, ISO 9001<\/td><td>30\u20136.000 Nm<\/td><td>Erd\u00f6l, Chemie, Wasseraufbereitung, Offshore\/Allgemeine Industrie<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Lieferantenauswahlmatrix<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Auswahlfaktor<\/strong><\/td><td><strong>Anforderung an Industriequalit\u00e4t<\/strong><\/td><\/tr><tr><td>Zertifizierungen<\/td><td>CE, ATEX, SIL3, ISO 9001 \u2013 obligatorisch f\u00fcr Installationen in explosionsgef\u00e4hrdeten Bereichen<\/td><\/tr><tr><td>Drehmomentbereich<\/td><td>30\u20136.000 Nm f\u00fcr Ein\/Aus und <a href=\"https:\/\/www.aox-actuator.com\/de\/product\/aox-vr-modulating-electric-valve-actuator\/\" type=\"link\" id=\"https:\/\/www.aox-actuator.com\/product\/aox-vr-modulating-electric-valve-actuator\/\" target=\"_blank\" rel=\"noreferrer noopener\">Modulierende Steuerung<\/a><\/td><\/tr><tr><td>IP-Schutzart<\/td><td>IP67 Minimum f\u00fcr Au\u00dfenbereiche oder Nassbereiche<\/td><\/tr><tr><td>Lieferzeit<\/td><td>15\u201320 Tage Standard; Best\u00e4tigung vor Projektterminen<\/td><\/tr><tr><td>Qualit\u00e4tskontrolle<\/td><td>100% Werksdruck- und Zyklustests mit r\u00fcckverfolgbaren Aufzeichnungen<\/td><\/tr><tr><td><a href=\"https:\/\/www.aox-actuator.com\/de\/download\/\" type=\"link\" id=\"https:\/\/www.aox-actuator.com\/download\/\" target=\"_blank\" rel=\"noreferrer noopener\">Dokumentation<\/a><\/td><td>Schaltpl\u00e4ne, Drehmomentkurven und Unterst\u00fctzung bei der Systemintegration<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Vier Pr\u00fcfungen, bevor Sie eine Bestellung aufgeben<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">1. ATEX-Dokumentation im Voraus anfordern. Zertifikatsnummer, benannte Stelle und Umfang \u2013 keine Spezifikationsblatt-Referenz. Jeder Lieferant, der dies nicht sofort vorlegen kann, besteht den Qualifizierungstest f\u00fcr explosionsgef\u00e4hrdete Bereiche nicht.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2. Modulierende Regelung mit Live-Signal testen. Fordern Sie eine Demonstration mit 4\u201320 mA oder 0\u201310 V an. Ein\/Aus-Betrieb ist trivial; wiederholbare modulierende Positionierung unter Last trennt f\u00e4hige Hersteller von Monteuren.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3. Verify IP67 physically. Per IEC 60529, immerse a sample in one metre of water for 30 minutes. Offshore environments and chemical plant wash-downs expose every weakness an IP67 label conceals.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4. Confirm torque margins for your operating temperature. The actuator\u2019s rated torque must exceed the valve\u2019s breakaway torque by at least 25% at the minimum operating temperature, not at ambient. Undersized actuators are the most common cause of field failures on butterfly valve installations.<\/p>\n\n\n\n<style>\n  .product-card {\n    display: flex;\n    flex-direction: row;\n    width: 100%;\n    max-width: 800px;\n    background-color: #ffffff;\n    border: 1px solid #e0e0e0;\n    overflow: hidden; \/* Ensures image\/content don't spill out *\/\n    align-items: stretch;\n    font-family: Arial, sans-serif;\n  }\n\n  \/* Left Image Section (50%) *\/\n  .card-image-wrapper {\n    flex: 1;\n    width: 50%;\n    line-height: 0; \/* Removes bottom spacing *\/\n  }\n\n  .card-image-wrapper img {\n    width: 100%;\n    height: 100%;\n    object-fit: cover; \/* Keeps image full and centered *\/\n    display: block;\n  }\n\n  \/* Right Content Section (50%) *\/\n  .card-content {\n    flex: 1;\n    width: 50%;\n    padding: 30px;\n    display: flex;\n    flex-direction: column;\n    justify-content: center;\n    box-sizing: border-box;\n  }\n\n  .card-title {\n    display: block;\n    font-weight: bold;\n    font-size: 1.25rem;\n    color: #333;\n    margin-bottom: 15px;\n  }\n\n  .card-description {\n    font-size: 0.95rem;\n    color: #666;\n    line-height: 1.5;\n    margin-bottom: 25px;\n  }\n\n  \/* Button Styling *\/\n  .card-btn {\n    display: inline-block;\n    width: fit-content;\n    padding: 10px 25px;\n    background-color: #FCCC22;\n    color: #ffffff;\n    text-decoration: none;\n    font-weight: bold;\n    border: 2px solid #FCCC22;\n    transition: all 0.3s ease;\n    border-radius: 4px;\n  }\n\n  \/* Hover State: Colors Inverted *\/\n  .card-btn:hover {\n    background-color: transparent;\n    color: #FCCC22;\n  }\n\n  \/* Responsive adjustment for mobile *\/\n  @media (max-width: 600px) {\n    .product-card {\n      flex-direction: column;\n    }\n    .card-image-wrapper, .card-content {\n      width: 100%;\n    }\n  }\n<\/style>\n\n\n\n<div class=\"product-card\">\n  <div class=\"card-image-wrapper\">\n    <img decoding=\"async\" src=\"https:\/\/www.aox-actuator.com\/wp-content\/uploads\/2024\/09\/electric-gate-valve-\u2013-1.jpg\" alt=\"Elektrisches Bel\u00fcftungsventil\">\n  <\/div>\n\n  <div class=\"card-content\">\n    <span class=\"card-title\">Elektrisches Bel\u00fcftungsventil\n<\/span>\n    <p class=\"card-description\">\n     Electric ventilation butterfly valve, also known as electric flow indicator regulating butterfly valve, is composed of a quarter-turn electric actuator and a butterfly valve.\n    <\/p>\n    <a href=\"https:\/\/www.aox-actuator.com\/de\/product\/electric-ventilation-valve\/\" class=\"card-btn\">MEHR ERFAHREN<\/a>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Abschlie\u00dfende Gedanken<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Matching the electric ventilation butterfly valve China manufacturer\u200b to the actual application \u2014 by torque, certification, and environment \u2014 is the work that separates a clean commissioning from a warranty claim. Jiangsu Huagong and YOY Valve belong on hazardous-area shortlists. COVNA and Huibo cover standard industrial and HVAC needs. GenTant owns angle-pattern air vent applications. Haoxing handles precision cleanroom work. Walter suits complex engineering projects. Zhonghai stays in residential heating.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">AOX Actuator brings 30+ years of manufacturing experience to electric valve automation, with factory-direct pricing that delivers 20\u201340% cost savings versus distributor channels \u2014 without sacrificing the ATEX certifications, torque range, or documentation that industrial projects demand.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;<strong>H\u00e4ufig gestellte Fragen<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Worauf sollte ich bei einem f\u00fchrenden Hersteller von elektrischen L\u00fcftungsventilen in China achten?<\/strong>&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">You should prioritise manufacturers with at least 20 years of experience, high-level certifications (like ATEX or SIL3), and a proven track record as a supplier to major industrial corporations.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Wie kann ich die Kosten f\u00fcr Ventilautomatisierung senken, ohne die Qualit\u00e4t zu beeintr\u00e4chtigen?<\/strong>&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">By sourcing directly from a factory-direct manufacturer like AOX, you can achieve 30-40% cost savings compared to European brands while maintaining equivalent quality and technical documentation.<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color has-medium-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/www.aox-actuator.com\/de\/contact\/\" style=\"background-color:#ffc107;font-style:normal;font-weight:700\" target=\"_blank\" rel=\"noreferrer noopener\">Kontaktieren Sie uns<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Electric ventilation butterfly valves regulate airflow across chemical plants, power stations, and large-scale HVAC systems. Get the specification wrong \u2014 wrong actuator torque, wrong IP rating,<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":5020,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[],"class_list":["post-4974","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-manufacturer"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Electric Ventilation Butterfly Valve \u2014 Top China Suppliers | AOX<\/title>\n<meta name=\"description\" content=\"Sourcing an electric ventilation butterfly valve from China? Compare the top 8 manufacturers by specs, certifications, and lead times \u2014 and find out why.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.aox-actuator.com\/de\/blog\/manufacturer\/top-electric-ventilation-butterfly-valve-manufacturers-china\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Electric Ventilation Butterfly Valve \u2014 Top China Suppliers | AOX\" \/>\n<meta property=\"og:description\" content=\"Sourcing an electric ventilation butterfly valve from China? 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