REXROTH A4VG PUMP
Brueninghaus Hydromatik Rexroth A4VG pump
Hydraulic variable displacement axial pump A4VG40, A4VG56, A4VG71, A4VG90, A4VG125, A4VG180, A4VG250DescriptionSeries 32
Nominal pressure 400 bar
Peak pressure 450
Control device: NV, HD3, HW, DG, DA1, DA2, EP3, EP4, EZ1, EZ2
The A4VG axial piston variable pump in swash plate design for hydrostatic closed circuit transmissions
- Flow is proportional to drive speed and displacement and is infinitely variable
- Output flow increases with the swivel angle of the swash plate from 0 to its maximum value
- Flow direction changes smoothly when the swash plate is moved through the neutral position
- A wide range of highly adaptable control devices is available for different control and regulating functions
- The pump is equipped with two pressure-relief valves 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 and control oil pump
- The maximum boost pressure is limited by a built-in boost pressure relief valve
- The integral pressure cut-off is standardTechnical Data
Table of values (theoretical values, without efficiency and tolerances; values rounded)SizeA4VG40A4VG56A4VG71A4VG90A4VG125A4VG180A4VG250Displacement
variable pumpVg maxcm340567190125180250boost pump (20 bar)Vg Spcm38.611.619.619.628.339.852.5Speed
maximum Vg maxconti.rpm4000360033003050285025002400limited maximumlimitedrpm4200390036003300325029002600intermittent max.Min.rpm5000450041003800345030002700nminrpm500500500500500500500Flow
continuous and Vg maxl/min160202234275356450600Power
continuous Vg max400 barkW107134156183237300400Torque
at Vg max400 barNm25535645157279511441590100 barNm63.589112.8143198.8286398Moment of inertiaJGRkgm20.00380.00660.00970.01490.02320.04440.0983Angular accelerationαrad/s23000024000210001800014000110006700Filling capacityVL1.11.51.31.52.13.16.3Weight approx.mkg3138506080101156