A 4-inch butterfly valve with actuator is a flow control device designed for pipelines with a 4-inch diameter, featuring an actuator—electric, pneumatic, or hydraulic—for automated operation. The actuator allows the valve to open or close with precision and speed, eliminating the need for manual handling. This setup is ideal for medium-sized systems that require reliable and frequent flow control. 4-inch butterfly valves with actuators are commonly used in water treatment, HVAC, and industrial processing applications due to their compact design, ease of installation, and efficient performance.