Usage:
Description
The UG actuator is a proportional electrohydraulic actuator. The UG actuator can be used with electronic controls that provide a 20 to 160 mA position signal.
The UG actuator converts a given electrical signal to an output shaft position through the action of a torque motor and a follower type pilot valve. The rotary output actuator has 42 degrees of terminal (output) shaft travel. Recommended travel from the no load position to the full load position is 2/3 of full actuator travel.
The UG actuator provides a maximum work capacity of 28.6 J (20 lb ft). Work capacity is based on the full 42 degree travel of the terminal (output) shaft. Rated work capacity is 2/3 of the maximum work capacity.
The UG actuator is configured with a low speed pump for speed ranges of 375 to 1100 rpm.
Hydraulic Pump
The UG actuator is equipped with a Gerotor pump (3161 governor type). High speed and low speed hydraulic pumps are available, depending on the drive speed from the engine. The hydraulic pump uses oil from the self-contained UG actuator sump to provide 1172 kPa (170 psi) internal operating pressure.
The direction of rotation is selected by pump housing alignment. The hydraulic pump operates in one direction only. The drive uses a maximum of 375 W (0.5 hp). In some cases the UG actuator may require an oil cooler to operate at the high end of the drive speed range.
Reference Drawings
This manual provides an outline drawing to show the base and drive configurations. The outline drawing includes information on electrical wiring, installation dimensions, drive requirements, and output shaft dimensions. The drawing is provided for reference only.
