Duro Dyne 35072 Round Pressure Relief Damper 12 in

Product Description

The DURO DYNE 35072 is a round galvanized steel pressure relief damper designed to regulate and relieve excess static pressure in HVAC duct systems. Constructed from galvanized steel, this damper provides corrosion resistance suited for both supply and return air applications. With a 12-inch diameter, it is sized for medium to larger trunk lines and branch runs where pressure balancing is critical to system performance. Licensed HVAC technicians and sheet metal contractors install this damper as part of a properly engineered air distribution system to prevent over-pressurization and protect duct integrity.

This damper is used in residential and light commercial HVAC installations where duct static pressure must be managed. Common applications include systems with variable air volume (VAV) operation, zoned systems with multiple dampers, or any installation where sudden pressure spikes could compromise duct seams or equipment. It fits into round duct runs at 12 inches and is field-installed during new construction or system retrofits.

Key Features

• Round configuration sized at 12 inches diameter for direct inline duct installation
• Galvanized steel construction provides durability and corrosion resistance in air-handling environments
• Pressure relief design automatically responds to excess static pressure to protect duct systems
• Model DDRD-12 fits standard 12-inch round ductwork without custom fabrication

Compatibility

Designed as an OEM-style pressure relief damper for standard 12-inch round duct systems in residential and light commercial HVAC applications.

Installation Notes

Installation should be performed by a licensed HVAC technician or sheet metal contractor in accordance with local mechanical codes and SMACNA duct construction standards. Power down the air handling unit and confirm zero pressure in the duct system before cutting into any existing ductwork. Secure the damper with sheet metal screws and seal all joints with UL-listed duct sealant or foil tape to maintain system integrity. Do not install in locations where the damper blade movement will be obstructed by adjacent fittings or hangers.

Technical Specifications

• Model Number: DDRD-12
• Diameter: 12 inches (300 mm)
• Material: Galvanized Steel
• Configuration: Round
• Valve Type: Pressure Relief

Standard Information

• Brand: DURO DYNE
• Manufacturer Part Number: 35072