Parker Servo Valves are precision control valves that are used to control the flow of fluids in a wide range of industrial and aerospace applications. 

They use an electric or pneumatic actuator to precisely control the movement of the valve’s internal elements, which in turn regulates the flow of fluid through the valve. 

They are known for their high accuracy, fast response times, and ability to handle high-pressure and high-temperature applications. 

Parker Servo Valves are available in a variety of sizes and configurations to meet the specific needs of different applications.