What characterizes a bi-directional hydraulic actuator?

A bi-directional hydraulic actuator is characterized by its ability to perform both extending and retracting motions. This capability allows for versatility in various applications, as it can create forward and backward movement depending on the hydraulic fluid direction within the system. The ability to extend and retract is fundamental to the functionality of these actuators in tasks that require accurate positioning or an oscillating motion.

In contrast, options that suggest restriction to a single direction, such as only extending or moving in only one direction, describe unidirectional actuators, which do not provide the full range of motion needed for many hydraulic systems. Similarly, stating that an actuator operates at a constant speed does not encompass the functional characteristic of being bi-directional, as the speed can vary depending on the system design and fluid dynamics involved in the hydraulic circuit.