Abstract: A valve assembly for a container filling machine. The filling machine includes a rotating turret or carrier having a series of platforms that support individual containers, such as cans, to be filled. Mounted above each platform is a valve assembly which controls the fluid flow to the can. Each valve assembly includes a valve body and a rotatable disc, and the body and the disc have mating surfaces, each containing ports that can be moved into registry as the disc is rotated with respect to the body to effect fluid flow. To rotate the disc during the cycle of operation, a single arm is attached to the disc and carries a follower which is adapted to engage a series of fixed cam tracks as the carrier rotates to move the arm and rotate the disc to obtain the desired registry of the ports.