Motorized Wafer Butterfly Valve: Features and Applications

Regardless of how they are activated, all wafer butterfly valves serve the same purpose—to allow, stop, or control the flow of liquids or semi-solids.

When you turn the valve handle counterclockwise a quarter of a turn, the stem and disc also turn, aligning the disc with the fluid flow to halt it. Rotating the handle clockwise for a quarter turn positions the disc perpendicular to the flow, allowing the fluid to pass through.

To close a wafer butterfly valve, you turn the handle clockwise, causing the disc to rotate and become perpendicular to the pipe. When the disc contacts the seat, the valve is fully closed, stopping the fluid flow.