Butterfly Airflow Dampers

Butterfly Airflow Dampers for Modulating Laboratory Air Control Butterfly airflow dampers vary an air path by rotating a blade within a round or rectangular body. They can be configured for laboratory supply, general exhaust, fume hood exhaust, duct airflow and pressure control, or hazardous-area actuator requirements. The damper body and actuator are only part of the control loop; sensing, command logic, balancing, and commissioning determine how the installed branch performs.

Match the Damper Geometry to the Duct and Application Use a round VAV butterfly damper for circular duct connections and a rectangular VAV butterfly damper where the equipment or duct layout requires a rectangular section. The fume hood version is coordinated with the hood control sequence, while the duct airflow-control configuration supports broader branch regulation. An explosion-proof actuator must be evaluated against the area classification and electrical design rather than selected from the product name alone.

Specify the Complete Control Package Provide duct size, connection, minimum and maximum airflow, available pressure, air-stream chemistry and temperature, body and exposed-part material, actuator torque, runtime, power supply, command and feedback signals, fail position, sensing method, BMS points, and installation orientation. Confirm access for the actuator, shaft, seals, and balancing measurements.

If the project specification requires a characterized pressure-independent valve mechanism, compare the Venturi Air Valve range. For manual balancing without an actuator, use the Manual Air Dampers category.