Kromschröder GT50

Reversible gear motors to transmit rotary movements between 0 and 90° or 0 and 160°, for actuation of gas and air valves, with voltage-free limit switches, automatic/manual mode changeover (optional), position feedback and externally readable position indicator.
Running times: 3.7 to 214 s,
mains voltage: 24 V AC, 110/120 V AC or 220/240 V AC,
torque: 1.2 to 20 Nm,
controlled by three-point step signal, continuous signal or two-point signal.

• Controlled by three-point step signal:
GT 50..E by continuous signal,
GT 50..R by two-point step signal
• Simple commissioning thanks to Automatic/Manual mode
changeover
• Position indicator that can be read externally
• Precise setting of the switching positions thanks to infinitely adjustable
switching cams
• Installation options for two control elements
• Spacious connection chamber for ease of installation
• Any installation position
• Low-maintenance operation

Gear motor GT 50 is mounted directly onto
a butterfly valve, for example, DKR, in order
to control the gas and air flow rates on gas
burners. It is designed for applications that
require precise, controlled rotary movement
between 0° and 90° or 0° and 160°.
There are two possible ways of checking the
current position of the actuator – either using
an optional feedback potentiometer or an
optional current sensor. These checking functions
can be used in automation processes.
The GT 50 is controlled by a continuous signal
or three-point step signal. The Automatic/
Manual mode changeover and the position
indicator that can be read externally assist
in the setting of the infinitely adjustable
switching cams upon commissioning. This
enables precise settings even in the low-fire
rate range.
Gear motor GT 50..U is available with reversed
direction of rotation for butterfly valves
with stop bars, e.g. DKR..A.