High-Velocity HVAC Duct System With Motorized Valve Assembly

This technical drawing depicts a high-velocity HVAC duct system with integrated motorized valve assemblies. The central circular component represents a motorized butterfly valve (diameter approximately 80mm) with flanged connections to rectangular ductwork. The drawing shows both DIN40 and DIN80 standard fittings, with teh main duct transitioning from rectangular to circular cross-sections through precision-engineered reducers. Two valve assemblies are visible in a primary-secondary configuration, suggesting a zone control or bypass arrangement. The interconnected ducting includes proper clearance for maintenance access and incorporates flange connections (FLG40/FLG80) for modular installation. The system appears designed for industrial or commercial applications where precise airflow control is critical; note how the butterfly valve is positioned to minimize turbulence while maintaining system pressure balance—a practical consideration in high-velocity systems where noise reduction is essential.