Each AVS Rotator runs on the G-Rotor Principle (hydraulic rotator with toothed washer construction).  The interaction of a three-way driving unit with a double distributor-valve function, bypass valves and proportionally adjustable pressure compensation valves makes up the innovative drive of the rotator.  Gear teeth ensure a positive connection between rotor and shaft. The rotor has an external gear. Pressure chambers arise from the interaction between this external gear and the internal gear of the rotor ring. Distibutor plates are on both sides of the rotor. The distributor plates run the rotor. Due to the distributor plates the pressure chambers are alternately filled and emptied. The distributor plates in turn are filled and emptied by the connections.

Due to the displacement principle the rotor ring is moved eccentrically over the rotor. The rotor ring rolls away over the rotor housing and consequently generates a torque. As a result the rotor turns. The force of the distributor plates, witch acts on the rotor, is adjusted by proportionally adjustable pressure compensation valves. In that way wear is reduced to a minimum and durability is highly increased. Due to the inversion of the flow direction the direction of the rotation changes. In order to put the AVS-Rotators to the best possible use an operating pressure from at least 180 to a maximum of 320 bar.