WITHDRAWN--C505-58: AWWA Standard for Metal-Seated Butterfly Valves (PDF)

This standard covers cast-iron and steel, flanged-end, bell end, and mechanical-joint end metal-seated butterfly valves 3-72 in. in size, for maximum shutoff pressures and line velocities, together with torque requirements for operation. The valves specified are suitable for frequent operation, operation after long periods of idleness, and operation in a throttled position in water lines.