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Rexroth A15VSO175LRDRA0V/10MRVE4B21EU0000-0 Hydraulic Pump
Overview
The Rexroth A15VSO175LRDRA0V/10MRVE4B21EU0000-0 is a high-performance axial piston variable displacement pump manufactured by Bosch Rexroth. As part of the A15VSO series (Series 12), this pump features a swashplate design and is specifically engineered for stationary industrial applications in open-circuit hydraulic systems. The A15VSO series represents a significant advancement in high-pressure pump technology, combining significantly lower noise emissions with improved efficiency and a robust, leak-free design.
Technical Features
Swashplate Axial Piston Design — The pump utilizes a swashplate-type axial piston variable displacement design specifically for hydrostatic drives in open-circuit hydraulic systems -9. The flow output is proportional to the input drive speed and displacement volume, and by adjusting the swashplate (cradle) angle, output flow can be infinitely varied.
High Displacement & Pressure Ratings — The pump has a maximum geometric displacement of 175 cm³ per revolution. It operates at a nominal pressure of 350 bar (5,076 psi) and can withstand maximum intermittent pressures up to 420 bar (6,090 psi) .
LRDRA0V Advanced Control — The pump is equipped with LRDRA0V control, which combines multiple control functions including power control (torque limiting), pressure control, and flow control. This integrated control system enables the pump to automatically manage displacement based on system demands, providing efficient, highly precise control of power, pressure, and flow.
LR Power Control (Torque Limiting) — The LR (power control) function limits the pump's input torque by automatically reducing displacement as system pressure increases, following a hyperbolic characteristic curve. This protects the prime mover from overload while allowing maximum utilization of available power across the operating range. The power control setting is externally adjustable, even when the pump is running -10.
Integrated Electronic Control (MRVE4B21EU0000-0) — The MRVE4B21EU0000-0 suffix indicates a specific electronic control configuration, likely incorporating proportional solenoid control for precise, remote operation. The A15VSO series supports numerous hydraulic and electric controllers for remote control operation, enabling efficient, highly precise control of power, pressure and flow.
One-Piece Leak-Free Housing — The pump features a one-piece housing design that eliminates numerous sealed oil paths, moving closer to the goal of a leak-free design . The housing structure is optimized for minimum sound emissions.
Low Noise Operation — The pump is designed with an optimized housing structure that significantly reduces noise emissions. The airborne noise level has been reduced by up to 2 dB(A) at full flow operation and up to 3 dB(A) during pressure holding periods (high-pressure standby). Additionally, the operating noise has been shifted to a frequency range that is perceived as more sonorous and agreeable to the human ear.
High Overall Efficiency — Design improvements bring the overall efficiency of the axial-piston pump up to 93%, with volumetric efficiency of approximately 95%.
Over-Center Operation Capability (+/- 100% Swivel Range) — The swivel range has been expanded to +/- 100% to enable complete over-center operation for extremely fast and efficient decompression.
Universal Through-Drive Capability — The pump is equipped with a universal through-drive (Version with through drive option), which simplifies the process of combining different pumps -2-8. This allows for the mounting of additional gear pumps and axial piston pumps up to the same size (100% through-drive) directly onto the existing unit without requiring separate coupling mechanisms.
Compact Housing Design — The new compact housing features an optimized layout of flow channels and better use of installation space, simplifying the process of fitting the pump even in very tight spaces.
Self-Priming Capability — The pump can work either self-priming or with a charge pump. A boosted version with impeller (A15VLO) is also available for up to 20% higher operating speeds.
Robust Construction — Designed with a corrosion-resistant cast iron body, the pump ensures long-lasting durability in harsh industrial environments -4-5. The drive shaft can withstand both axial and radial loads.
Clockwise Rotation — The "10MRV" in the model code indicates specific rotation and mounting configuration.
Wide Operating Range — The pump operates effectively with mineral oil-based hydraulic fluids across a wide viscosity and temperature range, with an operating temperature range of 30-90°C.
Key Functionalities
Stepless Variable Displacement — The flow rate can be infinitely varied by adjusting the swashplate angle, providing precise, stepless control over hydraulic output from zero to maximum displacement. The output flow is proportional to the drive speed and pump displacement.
Power (Torque) Limiting Control — The LR (power control) function is a defining feature of the LRDRA0V control system. This function limits the pump's input power by automatically reducing displacement as system pressure increases, following a hyperbolic characteristic curve. This protects the prime mover (electric motor or diesel engine) from overload while allowing maximum utilization of available power across the operating range.
Pressure Control — The pump provides precise pressure regulation, maintaining stable system pressure regardless of load variations. The pressure setting range extends up to 420 bar peak.
Load-Sensing Control — The pump supports load-sensing functionality, where the pump automatically adjusts its displacement to maintain a constant pressure difference between the pump outlet and the load. This ensures that the pump delivers only the flow required by the actuator, minimizing overflow losses and improving system efficiency.
Open-Circuit Hydrostatic Transmission — The pump is specifically designed for open-circuit operation, where fluid returns to the reservoir after each cycle. In an open circuit, the hydraulic fluid flows from the reservoir to the hydraulic pump, from where it is fed to the consumer, then directly back to the reservoir.
Energy Regeneration / Pump-Motor Operation — The pump can recover potential energy during pump/motor operation almost completely. The expanded swivel range to +/- 100% enables complete over-center operation, allowing the pump to function as a motor for extremely fast and efficient decompression. This enables innovative regeneration concepts that can improve the efficiency of machines and systems.
Energy Efficient Operation — With overall efficiency up to 93% and volumetric efficiency of approximately 95%, the pump delivers high energy efficiency. The load-sensing and power control functions ensure that the pump delivers only the power required by the load, reducing hydro-mechanical losses, minimizing heat generation, and lowering power consumption.
Multiple Pump Configurations — The universal through-drive capability allows the pump to serve as a primary unit driving secondary pumps (axial piston pumps, gear pumps) up to the same size, reducing system complexity and enabling compact, space-saving hydraulic system designs.
High Reliability & Low Maintenance — With its robust cast iron construction, one-piece leak-free housing design, wear-resistant components, and proven design, the pump ensures long-term operational stability with minimal maintenance requirements, reducing downtime and total cost of ownership.
Application Sectors
The Rexroth A15VSO175LRDRA0V/10MRVE4B21EU0000-0 hydraulic pump is specifically designed for stationary industrial applications requiring high-pressure hydraulic power with integrated power, pressure, and flow control -2-9. The A15VSO series is widely used across a broad spectrum of industries:
| Industry Sector | Typical Applications |
|---|---|
| Industrial Machinery | Injection molding machines, blow molding equipment, plastic machinery, die-casting machines requiring precise pressure and flow control |
| Heavy Industrial Hydraulics | Hydraulic presses (forging presses, stamping presses), hydraulic punching machines, extrusion presses requiring both high flow and high pressure with power limiting protection |
| Metallurgy & Steel | Rolling mills, steel mill hydraulic systems, continuous casting lines, heavy material handling equipment |
| Machine Tools | CNC machine tools, heavy-duty machining centers requiring precise hydraulic control |
| Testing & Simulation Equipment | Hydraulic test benches, flight simulators, automotive test equipment requiring high-frequency and high-precision hydraulic control |
| Ceramic Industry | Ceramic factory hydraulic equipment, tile presses, refractory presses |
| Paper Manufacturing | Paper mill hydraulic systems, paper machinery hydraulic components |
| Aerospace | Aerospace ground support equipment, aircraft manufacturing hydraulic systems |
| Petroleum & Petrochemical | Oil field equipment, drilling machinery, petrochemical processing equipment |
| Marine & Offshore | Ship hydraulic systems, deck machinery, steering gear |
| Construction Machinery | Excavators, cranes, loaders (stationary applications) |
| Agricultural Machinery | Heavy agricultural equipment requiring high-pressure hydraulics |
| Power Generation | Coal handling systems, power plant hydraulic equipment |
Performance Specifications
| Specification | Value |
|---|---|
| Manufacturer | Bosch Rexroth |
| Series | A15VSO, Series 12 |
| Model Code | A15VSO175LRDRA0V/10MRVE4B21EU0000-0 |
| Pump Type | Axial piston variable displacement pump (swashplate design) |
| Circuit Type | Open circuit |
| Displacement (Vg max) | 175 cm³/rev |
| Nominal Pressure (Continuous) | 350 bar (5,076 psi) |
| Maximum Pressure (Intermittent) | 420 bar (6,090 psi) |
| Control Type | LRDRA0V — Power control (LR) + Pressure control + Flow control with electronic configuration |
| Overall Efficiency | Up to 93% |
| Volumetric Efficiency | ~95% |
| Noise Reduction | Up to 2-3 dB(A) reduction compared to previous models |
| Swivel Range | +/- 100% (over-center operation capable) |
| Housing Material | Cast iron (corrosion-resistant, one-piece design) |
| Through-Drive | Universal through-drive (100% capacity for adding additional pumps) |
| Mounting | Flexible, compact housing with optimized flow channels |
| Fluid Compatibility | Mineral oil-based hydraulic fluids (HLP per DIN 51524) |
| Self-Priming | Self-priming capability or operation with charge pump |
| Operating Temperature Range | 30-90°C |
| Fluid Cleanliness Requirement | ISO 4406 minimum (recommended 18/16/13 or better) |
| Application Type | Stationary industrial applications |
Conclusion
The Rexroth A15VSO175LRDRA0V/10MRVE4B21EU0000-0 is a state-of-the-art axial piston variable displacement pump that exemplifies Bosch Rexroth's decades of expertise in high-pressure hydraulic drive technology. As part of the advanced A15VSO Series 12, this pump delivers exceptional power density, precise control, and reliable operation for demanding stationary industrial open-circuit hydraulic systems.
The pump's defining features include its high pressure capability (nominal 350 bar, peak 420 bar), integrated LRDRA0V control system combining power (torque) limiting, pressure control, and flow control, universal through-drive capability for flexible system expansion, and innovative one-piece leak-free housing design. The expanded +/- 100% swivel range enables complete over-center operation, allowing the pump to recover potential energy during pump/motor operation for maximum energy efficiency.
With overall efficiency up to 93%, noise reduction of up to 3 dB(A), and a robust cast iron construction, this pump is an ideal solution for a wide range of stationary industrial applications — from injection molding machines, hydraulic presses, and rolling mills to machine tools, test equipment, ceramic presses, paper machinery, and aerospace ground support equipment.
As a proven, reliable, and energy-efficient solution for open-circuit hydrostatic drives worldwide, the A15VSO175LRDRA0V/10MRVE4B21EU0000-0 stands out as a versatile component where integrated power-flow-pressure control, high-pressure performance, low noise operation, and long-term dependability are essential requirements.
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