Patent ID: 8196892

Claim:
A valve comprising: a body comprising a fluid inlet and a fluid outlet in fluid communication with a gallery, the gallery being closed at a first end with a bonnet; a cage disposed within the gallery, the cage comprising at least one cage port there through allowing fluid communication between the fluid inlet and the fluid outlet when the valve is in an open position; a plug movably disposed within the cage, the plug comprising an outer wall and an inner wall, the outer and inner walls interconnected via a connecting web, the outer wall of the plug disposed adjacent the cage port and being movable linearly to substantially prevent fluid communication between the fluid inlet and the fluid outlet when the valve is in a closed position, the plug movable linearly within the cage to allow fluid communication between the fluid inlet and the fluid outlet when the valve is in the open position, the inner wall defining a flow passage through at least a portion of the plug; a stem extending through the flow passage, an inboard end of the stem disposed in a lower portion of the flow passage, an outboard end of the stem extending through the cage and an aperture in the bonnet to an exterior of the body; and a pilot plug coupled to the inboard end of the stem, the pilot plug disposed in the lower portion of the flow passage, the pilot plug adapted to transfer downward force from the stem to the plug and thereby urging the plug downward through the cage when the stem moves linearly downward through the flow passage away from the bonnet to adjust the valve from the closed position to the open position.