AAON Butterfly Valves regulate or isolate airflow and fluid flow in ductwork and piping systems by using a rotating disc to throttle passage. Available in wafer and lug patterns, these valves accommodate dampers, air balancing, and shut-off functions. Designed for durability and low leakage, Aaon Butterfly Valves help HVAC technicians and contractors control system pressures, balance airflow, and minimize maintenance requirements.