Directional control valves type DSG-03B are larger valves than DSG-02B valves. However, the DSG-03B valves are used in the same purpose: A machine operator can turn on/turn off a hydraulic motor or an actuator thanks to oil flow regulation, which is provided by these valves.

Directional control valves type DSG-02B are used for regulate oil flow in hydraulic system in order to change a rotation direction of a hydraulic motor or a direction of a piston rod movement of an actuator.