SM-1100/1500/1600 Series of Rotary Actuators The SM-1100, SM-1500 and SM-1600 Series are multi-turn, rotary actuators, designed to meet the exacting requirements for closed-loop modulating positioning control. They can be applied to valves, metering pumps, hydraulic and pneumatic pressure requlators, dampers, and many more industrial/process control applications where reliable remote positioning control is required. All SM-1100, SM-1500 and SM-1600 Series actuators are also available with an internal amplifier (AC voltage only). These amplifiers are all full-featured ac switching devices designed to work seamlessly with the actuator for closed loop control. Features permanently lubricated for any position mounting wide variety of speed/torque combinations wide ambient temperature range ac input power or DC input power versions full one year warranty