Butterfly valves use a flat circular disc to control the flow of system product in a piping system.

When the edge of the disc faces the system product flow, the valve is in the fully open position.

When the disc is across the system product flow, the valve is in the fully closed position.

Butterfly valves are also used for throttling.

Butterfly valves are classed as quarter turn, straight line valves.

butterfly valve how it works

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