Control valve for bottom discharge outlet

摘要

A discharge outlet for attachment to the bottom of a hopper which has a longitudinally extending discharge opening between spaced inner edges of the outlet side walls. An elongate control valve is mounted for rotation about a horizontal axis in the discharge opening between a pair of longitudinally extending parallel seats on opposed sides of the valve, and the control valve has its axis of rotation closer to one side of the control valve than to its other side whereby from a closed position weight of lading on the valve urges the valve in one direction of rotation to an open position in which lading is discharged about both sides of the control valve. The control valve includes a body portion extending longitudinally in the discharge opening, and a moment portion extending transversely and eccentrically relative to the axis of rotation of the body portion. The body portion includes a body portion edge which in closed position engages or is closely adjacent to a body portion valve seat located on or attached to the near side wall. The weight of the lading acting on the eccentrically mounted portion creates a moment about the control body portion which reduces the torque required to move the control valve to the open position.