Series 820DFV V-Ball Valves are quarter turn valves with a segment ball. Its V-notch ball design provides accurate and reliable control in a wide range of applications. It is ideal for throttling control of pulp and paper stock, slurries and fluids containing suspended solids or fibrous materials. In operation the V-Notch Ball creates a wedging and shearing effect, prevents the dragging of stock or slurry between the ball and ball seal. The straight through flow design provides high capacity for gases, liquids and fibrous material.