Certifications & Compliance
YOYAGE valve gearboxes hold CE and ISO 9001 certification and over 20 patents — a comprehensive product range built on proven quality and continuous innovation.
Documented Quality, Certified and Patented
Production management is certified to ISO 9001 and products achieve CE compliance, backed by over 20 valve gearbox patents. Copies of certificates and inspection reports are available on request.
Certificates & Patents
Explore YOYAGE Capabilities
Learn more about YOYAGE, the industries we serve, and how we inspect and certify every valve gearbox.
About YOYAGE
20+ years of valve gearbox manufacturing focus, with in-house production and systematic quality inspection.
About the Company
Industries
Serving water management, oil and gas, power generation, chemical processing, and more industries — proven in complex and demanding operating conditions.
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Quality Control
Incoming, in-process, and final inspection with torque testing and systematic checks before every delivery.
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Certifications
CE and ISO 9001 certified, backed by 20+ design and invention patents, with product test reports available for valve gearbox orders.
Explore CertificationsNeed Certified Valve Gearboxes for Your Project?
YOYAGE valve gearboxes are CE and ISO 9001 certified, with IP67 to IP68 protection and C3/C5 coating. Contact us for certificates, inspection reports, and a quotation.