Robust, Reliable, and Ready for High Pressure
The Bosch Rexroth A4VBO is a high-pressure axial piston pump that evolves the legendary reliability of the A4VSO design for modern systems operating up to 450 bar. It delivers exceptional power density and a very long service life, with optional advanced digital controls for precise, efficient, and intelligent machine operation. The A4VBO is the definitive choice for applications demanding the ultimate combination of power and proven reliability.
The Next-Gen A4VSO
- Strengthened Rotary Group: The core components are engineered with materials and geometries optimized for 450-bar operation
- Optimized Swashplate and Bearings: The swashplate design, central to flow generation, and its associated bearings are designed to handle higher continuous loads, ensuring stability and a very long service life
- Modular Design Heritage: The A4VBO retains the modularity of its predecessor, allowing for a wide range of control devices to be fitted to the same core pump
450 Bar Environment
- High Power Density: Delivers substantial power from a compact size (e.g., size 450 delivering 810 l/min) to achieve performance targets within tight space and weight constraints.
- Through-Drive Capability: Creates multipump combinations without needing separate motor pump groups
- Optimized Bearing and Case Flushing: Internal and external bearing flushing options to ensure optimal lubrication and thermal management of the drive shaft bearings
Optional Digital Control
- HS5 Digital Electrohydraulic Control: A proportional valve with electrical feedback for the swivel angle along with pressure transducers enable a suite of advanced functions:
- Electric pressure control
- Electric displacement (flow) control:
- Torque limitation
- On-Board Electronics (OBE) with HS5E: The HS5E variant integrates the digital controller (OBE) directly onto the pump, simplifying wiring, reducing cabinet space, and bringing the control intelligence closer to the point of action