7" Adjustable Butterfly Damper

The Hart & Cooley 050291 Adjustable Butterfly Damper is a precision-engineered airflow control component designed for use in round duct systems. This 7-inch damper, part of the 3800 Series, provides precise manual air balancing and flow regulation within supply or return ductwork. Constructed for durability and consistent performance, the damper features a steel body and butterfly-style blade with a corrosion-resistant golden sand finish suitable for both commercial and residential HVAC applications.

Details

• Model Number: 050291
• Manufacturer: Hart & Cooley
• Product Type: Adjustable Butterfly Damper
• Series: 3800
• Part Number: 131201
• Nominal Duct Size: 7 inch
• Damper Diameter: 7 inch
• Outside Diameter (OD): 8-1/2 inch
• Material: Steel
• Finish: Golden Sand
• Blade Type: Butterfly-style adjustable damper plate
• Control Type: Manual adjustment via external operator
• Application: Airflow balancing and shutoff control in round duct systems
• Mounting: Fits standard round duct sections; secured with mechanical fasteners or clamps
• Compliance: Conforms to SMACNA requirements for HVAC air distribution components

Professional Specifications

The Hart & Cooley 7-inch Adjustable Butterfly Damper (Series 3800) is constructed from formed steel for mechanical strength and resistance to deformation during installation or operation. The butterfly-style blade design provides uniform control over airflow with minimal pressure loss when fully open. The external control operator allows precise positioning for system balancing or isolation. The golden sand finish provides corrosion resistance and a durable surface suitable for long-term service in conditioned air systems. The damper assembly is dimensionally compatible with standard round duct fittings and designed for use in low- and medium-pressure HVAC air distribution systems.

Summary

The Hart & Cooley 050291 (Series 3800) 7-inch Adjustable Butterfly Damper provides a robust, code-compliant airflow control solution for professional HVAC installations. Its steel construction, precision-adjustable blade, and corrosion-resistant finish ensure dependable performance and long-term durability in air distribution and balancing applications.