Abstract: A constant flow distribution valve, particularly suited as the filler valve for a canning system, is constructed in the form of at least three stacked circular plates. The top or uppermost one of these plates has an elongated slot formed in it near the circumference, and oriented perpendicular to a radius of the top plate or concentrically with the circumference of the plate. This plate is mounted in a non-rotational position in the canning apparatus. A second plate and an indexing member are mounted together for rotation beneath the first plate. The second plate has its center line aligned with the center of the top plate, and includes a series of equally spaced distribution openings through it, with the openings aligned with the slot in the first plate as the second plate is rotated. Beneath the second plate is an indexing member for locating containers to be filled beneath each of the distribution openings in the second plate.