Actuated ball valves are sometimes fitted with an electric or pneumatic actuator instead of a manual handle operation to turn the valve on or off. They have a direct connection to the valve stem and can turn it a quarter of a turn.
Types of Actuated ball Valve.
There are two main types according to their movement:
- In double-acting actuators, air or liquid is delivered to both sides of the piston, with one side having a greater pressure than the other, resulting in the movement needed to actuate the valve. The pneumatic or hydraulic force of the air or liquid energy is used to open and shut the valve in this configuration.
- Spring-return or single-acting actuated valve only has one side of the piston supplied with air or liquid, and the energy to move the systems is provided by a spring on the opposite side. The pneumatic or hydraulic pressure of the fluids is used to open or close the valve when a spring affects the opposite motion.