Gear motor GT is ideal for all applications requiring precise and controlled rotary movements between 0 and 90° or 0 and 160°, e.g. actuation of butterfly valves, control fittings, air and flue gas throttles, etc. For modulating processes, GT 31 or GT 50 with three-point step control is used as standard. The GT..E with continuous signal actuation (e.g. 0 to 20 mA) can also be used. This gear motor has an electronic positioning control for added positioning accuracy. The two-step GT..R can be used for on/off or high/low burner control. The GT 31 is suitable for applications up to 3 Nm. Gear motor GT 50 can be used for higher torques up to 20 NM.