Lukjan rx3107 Manual Duct Damper 7 Inch Round Steel

Product Description

The LUKJAN rx3107 is a 7-inch round manual duct damper designed for precise airflow regulation in residential and light commercial HVAC duct systems. Built from galvanized steel, it provides durable, corrosion-resistant performance suited to both new construction and retrofit installations. The damper allows HVAC technicians to manually balance system airflow, fine-tuning distribution across zones to maintain consistent temperature control. Its compact profile at 1 inch in height keeps installation straightforward in tight duct runs. This is a field-installed component handled by licensed HVAC contractors and sheet metal mechanics working with round ductwork systems.

The rx3107 is intended for use with 7-inch round ductwork in forced-air systems where manual zone balancing or airflow restriction is required. Typical applications include residential trunk-and-branch duct systems, light commercial single-zone builds, and retrofit projects where a technician needs to throttle supply runs to correct system imbalance. The damper seats directly into round duct for a clean, low-profile installation that does not require additional fittings in most standard configurations.

Key Features

• 7-inch round manual damper for direct inline duct installation
• Galvanized steel construction for corrosion resistance and long service life
• Compact 1-inch height fits tight duct chases and plenums
• Manual operation allows field adjustment of airflow without actuators or controls
• Suitable for new construction and retrofit duct balancing applications

Compatibility

Designed as an OEM-style replacement and new-installation damper for 7-inch round duct systems in residential and light commercial forced-air HVAC applications.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal mechanic. Shut down the air handler and disable system power before cutting into ductwork or positioning the damper. Secure the damper to the duct using the appropriate sheet metal screws and seal connections with UL-listed foil tape or mastic per local mechanical code requirements. Do not fully close the damper on any supply run without verifying that total system static pressure remains within equipment design limits.