The SM range comprises SM-1700/5000 rotary and SM-6000 heavy-duty rotary actuators. SM-1700/5000 actuators with continuous modulation are ideally suited for dampers, vanes, valves and other process control applications requiring exact positioning control. SM-6000 actuators feature unrestricted continuous modulation, with automatic torque limiting and self-locking drive system to hold in last position and prevent backdriving. They are designed for dampers, vanes, valves and process control applications requiring high speed, high torque and exact positioning.