The B Series consist of dual displacement and variable displacement motors.  BD (Dual) have a large variety of displacement ratios and can handle power supplied via torque or speed depending on working conditions.  Changes in displacement can occur on the fly using hydraulic or electric control, and guarantee reliability and high performance through the circuit. 

BV (Variable) motors are integrated with an electronic control system, and can seamlessly change the displacement level between the maximum and minimum.  Ideal for any circuit with a wide range of functions, they maintain a high level efficiency even at low displacements.