These valves are used for shifting oil flow direction of hydraulic circuit and for a control of actuator
starting/ stopping as well as the operating direction shifting of actuator. Directional valves are classified in
the following five types depending on the operational method. Solenoid Operated Directional Valves,
Solenoid Controlled Pilot Operated Directional Valves, Pilot Operated Directional Valves, Manually
Operated Directional Valves, and Mechanically Operated Directional Valves.