Hydraulic control (120 Liter) original Parker, 4 lines. Original Parker hydraulic control, 4 lines, designed for precise and reliable control in hydraulic systems for forklifts and industrial equipment. It features high manufacturing quality and excellent resistance to continuous operating pressures, providing smooth response and precise control over the movement of hydraulic cylinders. Directional control valves are among the most important components of a hydraulic system as they direct oil flow and control the start, stop, and change of direction of movement.