A4VSO250DR/22L-PPB25N00 Original Rexroth A4VSO Series Piston Pump is designed for construction machinery and industrial machinery. This series main pump features high power density and high efficiency.The adoption of high load bearings and friction free material has achieved high reliability and long lifetime. The spherical valve plate and improved hydraulic balance provide stable cylinder rotation, this achieving high efficiency even in low-pressure and low speed operating range.