Spiral Duct Reducers

A spiral duct reducer connects two sections of spiral duct with different diameters, allowing airflow to transition smoothly between duct sizes. They are commonly used in industrial ventilation, dust collection, and material handling systems to maintain system pressure and optimize airflow efficiency throughout the ductwork network.

Duct Incorporated offers spiral duct reducers in standard sizes to accommodate a broad range of industrial duct system requirements. Standard sizing ensures consistent fitment and interchangeability. Contact our team for a complete list of available diameter combinations and to discuss any custom sizing needs for your specific application.

Spiral duct reducers are typically fabricated from galvanized steel, which provides excellent durability, corrosion resistance, and structural integrity for industrial environments. Depending on the application — such as dust collection or material handling — alternative materials may be available. Reach out to Duct Incorporated to discuss material options suited to your system requirements.

Spiral duct reducers are designed to slip-fit or be mechanically fastened to adjoining duct sections, with connections typically sealed using approved duct sealant or tape to prevent air leakage. The standard sizing of our reducers ensures compatibility with most spiral duct systems, simplifying installation and maintaining airtight integrity throughout the system.

Yes, spiral duct reducers are well-suited for dust collection systems. They facilitate smooth diameter transitions that help maintain proper conveying velocity and minimize turbulence, which is critical for efficient particulate transport. Duct Incorporated's reducers are available for industrial dust collection applications and can be selected in standard sizes appropriate for your system layout.

To select the correct reducer, identify the inlet and outlet duct diameters in your system, the airflow volume (CFM), and the required velocity. Matching these parameters ensures the reducer maintains proper pressure balance and airflow efficiency. Duct Incorporated's technical team can assist with design and selection — contact us for personalized support.