The working principle of a butterfly valve is simple yet effective. The valve has a circular disc mounted on a rotating shaft. When the handle or actuator turns the disc parallel to the flow, fluid passes through freely. When the disc is turned perpendicular, it blocks the flow completely.
Since the valve requires only a quarter turn (90 degrees) to open or close, it provides fast operation and is suitable for both manual and automatic control.
Butterfly valves can also be partially opened to regulate (throttle) the flow, making them versatile for different applications.
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