A double eccentric plug control valve is a type of rotary control valve featuring a uniquely shaped plug that doesn't contact the valve seat until it is within a few degrees of the closed position. The double eccentric design means that the plug has two offsets, which allow it to cam into the seat as it closes. This design ensures that the plug and seat surfaces dynamically align for a tight shut-off, reducing wear and enhancing the valve's sealing capabilities and longevity. The double eccentric mechanism improves efficiency and reliability, making it ideal for various industrial applications where precise flow control is required.