Which type of valve is characterized by a movable disk rotating on a spindle?

The butterfly valve is characterized by a movable disk that is attached to a spindle and rotates within the valve body to either allow or restrict the flow of fluid through the pipeline. This rotation of the disk is typically 90 degrees, and when fully opened, the disk is positioned parallel to the flow, allowing for an efficient passage of the fluid with minimal resistance. In contrast to other types of valves, such as the gate valve which uses a sliding gate to control flow, or the globe valve which uses a plug-like disk that moves perpendicular to the flow, the design of the butterfly valve allows for quicker operation and better control over flow rates. Its simple design also makes it suitable for large-diameter pipes and applications where space is limited. In summary, the unique operational mechanism of the rotating disk on a spindle distinctly identifies the butterfly valve compared to other valve types.