The actuator consists of a scotch yoke mechanism which is fully enclosed. The scotch yoke mechanism allows the M-Series actuator to provide a torque curve matching the torque requirements of the valve. The thread system of the traveling nut is self-locking, maintaining disc position under varying flow conditions. The M-Series is available with either a position indicator standard weatherproof design or can be purchased in a buriable option. As sized on BAW butterfly valves, the actuator requires a rim pull of 80 pounds or less on the hand wheel or chain wheel; with a 2″ (50mm) nut, the input torque requirement is 150 foot pounds or less. Optional extension accessories are available.
M-Series Actuators Specifications
3″ – 24″ (80 – 600mm)
MATERIALS OF CONSTRUCTION:
Cast-iron housing in buriable or weatherproof construction. One-piece yoke machined from a ductile iron casting. Carbon steel input shaft and aluminum bronze yoke bearing.
INPUT TORQUE CAPABILITY:
As required by AWWA C504, an input torque capability of 300 foot pounds against the open and closed position stops is standard. A 450-foot-pound capability is available as an option.
550 foot pounds.
Hand wheel, chain wheel or 2″ (50mm) square nut options.