Noah’s New Spring Return Series

The Noah quarter turn electric actuators are now available with the spring return option for torque ratings up-to 200 Nm and power supply voltages of 110/240 V AC 1 Ph, 440 V AC 3 Ph & 24 VDC. This option utilises a totally enclosed spiral spring connected in series with the actuator out-put drive.
In the power on mode the motor drives the out-put shaft simultaneously compressing the spring. An electro-magnetic brake locks the out-put shaft preventing the spring from releasing it’s energy. On loss of power or in the ESD mode, the brake is released and the spring drives the actuator to a fail-safe position. Spring travel time is 2 secs.
The addition of the spring return option to the Noah range makes it a very reliable, economically priced and versatile actuator for on off & position control for quarter turn valves & dampers.