2024-09-05
How It Works: Butterfly Valves
According to the British Valve and Actuator Association, a butterfly valve is “a valve in which the obturator rotates about an axis at right angles to the direction of flow, and in the open position, flow passes around the obturator.”In other words, a butterfly valve consists of a circular disc or plate built with a stem through the middle or attached offset. When opened, the disc pivots 90° in the valve bore, aligning with the flow and creating a nearly unrestricted flow path. Like ball valves, butterfly valves rotate 90° to enable quick shutoff.