Butterfly Valve Actuator

An actuator is a mechanical device for moving or controlling a mechanism or system. An actuator (as part of the actuated butterfly valve) typically is a mechanical device that takes energy, usually created by air, electricity, or liquid, and converts that into some kind of motion.

A butterfly valve is a valve used for flow regulation in which the disc takes the form of 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 actuated butterfly 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 Valve

A butterfly valve actuator controls the flow of gas or liquid by means of 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 actuated butterfly valves offer a rotary stem movement of 90 degrees or less, in a compact design. Unlike ball valves, butterfly valves do not have any pockets in which fluids may become trapped when the valve is closed.

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