BOSCH Rexroth A4VTG Series 33 Axial Piston Variable Pump

Features A4VTG Series 33 Sizes A4VTG71, A4VTG90 Nominal pressure 5800 psi (400 bar) – Variable axial piston pump of swashplate design for hydrostatic drives in closed circuit – The flow is proportional to the drive speed and displacement. – The flow increases as the angle of the swashplate is adjusted from zero to its maximum value. – Flow direction changes smoothly when the swashplate is moved through the neutral position. – Two pressure-relief valves are provided on the high pressure ports to protect the hydrostatic transmission (pump and motor) from overload. – The high-pressure relief valves also function as boost valves. – The integrated boost pump acts as a feed pump and control pressure supply. – The maximum boost pressure is limited by a built-in boost pressure-relief valve. – Tapered shaft option for direct drive shaft yoke installation Maximum pressure 6500 psi (450 bar) Closed circuit For the drum drive in mobile concrete mixers