VM663 is a rotary motion, non-spring return, actuator. It is used specifically with ESBE mixing valves in sizes 1/2" to 2". The VM663 has a manual overide as standard. Mounting hardware for the mixing valve comes with the actuator.
A modulating (VM659) is also available.
Control mode: Modulating 2-10 Vdc/4-20 mA
Torque: 45 in.lb
Power: 24 Vac, 3 VA