SK Air System

Round Duct Damper is a mechanical device used to regulate, control, or isolate the flow of air in round duct systems. It is typically installed in HVAC (Heating, Ventilation, and Air Conditioning) systems, where it helps adjust or stop airflow in specific sections of a ductwork system. The damper can be manually or automatically operated and is essential for balancing airflow, maintaining system pressure, and ensuring the efficiency of the HVAC system.

1. Shape and Design: Round duct dampers are specifically designed to fit into round ducts, making them ideal for systems that use circular ductwork. The damper consists of a flat disc (the damper blade) that rotates within the duct, blocking or allowing airflow depending on its position.
2. Manual or Motorized Operation: These dampers can be manually adjusted with a handle or lever, or motorized for automatic operation, often controlled by a thermostat, pressure sensor, or building automation system.
3. Materials: Round duct dampers are typically made from durable materials such as galvanized steel, aluminum, or stainless steel to resist corrosion and withstand air pressure.
4. Sealing: Many round duct dampers are equipped with seals around the edges of the disc to prevent air leakage when the damper is closed.
5. Sizes: Round duct dampers come in various sizes to match the diameter of the ductwork. The size of the damper is crucial for proper airflow control in the system.

1. Manual Round Duct Damper: This type requires manual operation to adjust the airflow. The damper is typically adjusted using a handle or lever, which rotates the damper blade to open or close the duct passage.

2. Motorized Round Duct Damper: A motorized version uses an electric actuator to automatically open or close the damper. These dampers are typically used in systems that require automatic airflow control, such as in variable air volume (VAV) systems, zone control, or smart HVAC systems.

3. Spring-Loaded Round Duct Damper: This type of damper is designed with a spring that automatically closes the damper when it is not in use or when the airflow is reduced. It’s commonly used for safety or isolation purposes.

4. Volume Control Damper (VCD): A type of round duct damper designed specifically to balance airflow in ductwork. It allows for precise adjustments of the air volume in a particular duct section, which is useful for balancing the airflow across different zones in a building.

5. Backdraft Damper: A type of round duct damper that prevents the reverse flow of air, often used in exhaust systems. When airflow is not present, the damper automatically closes, preventing air from flowing back into the duct system.

6. Fire/Smoke Dampers: These dampers are designed to close automatically in the event of a fire or when smoke is detected, preventing the spread of fire and smoke through the ductwork. They often have a fusible link or other safety mechanism that triggers the closure of the damper when necessary.