What is an electric actuated butterfly valve?
A butterfly valve is a valve used for flow regulation in large pipe diameters in which the disc takes the form of a disk. Operation is similar to that of a ball valve. A plate or disc is positioned in the center of the pipe. The disc has a rod passing through it that is connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow.
Unlike a ball valve, the disc is always present within the flow, therefore a pressure drop is always induced in the flow, regardless of valve position.
Actuated Butterfly Control Valves, control the flow of gas or liquid utilizing a disk, which turns on a diametrical axis inside a pipe or by two semicircular plates hinged on a common spindle, which permits flow in only one direction.
These valves offer a rotary stem movement of 90 degrees or less, in a compact design. Unlike ball valves, they do not have any pockets in which fluids may become trapped when the valve is closed.
They are quick opening valves that consist of a metal circular disc or vane with its pivot axes at right angles to the direction of flow in the pipe, which when rotated on a shaft, seals against seats in the valve body.
They are normally used as throttling valves to control flow.