Hydraulic hydrostatic Steering Control Units are also known as orbitrol Steering Control Units (SCU), Hydrostatic Directions, Orbitrol Steering, Orbitrol Units.

Hydraulic Steering Control Units (SCU) are widely used in hydraulic rudder of ships,  steering of low-speed vehicles, such as tractor, truck, loader, grader, hauler, road roller, forklift ,combined harvester ,engineering or road construction machinery etc.