... A4VSO pump: bevel disc structure, axial piston variable pump, which is specially designed for the high efficiency hydraulic drive with open ... , 250, 300, 355, 500, 750 milliliter per rotation (A4VSO300 is special designed for ceramic press)3.Angle indicator with bevel ... to the rotating speed and pumping rate. The pumping rate is adjustable through bevel disc angle.10.Complete control mode, including DR ...