A4VSO125DFR/30L-PPB25N00 German Rexroth Piston Pump
A4VSO125DFR/30L-PPB25N00 German Rexroth Axial Piston Pump - Variable Displacement for Open Circuit
The A4VSO125DFR/30L-PPB25N00 is a high-performance swashplate-type axial piston variable pump manufactured by German Rexroth (Rexroth), designed specifically for open-circuit hydrostatic drives. With a nominal displacement of 125 cm³/r, it delivers reliable flow proportional to drive speed and offers infinite flow adjustment via swashplate angle. This model features DFR (Pressure/Flow Control), making it ideal for industrial machinery requiring precise hydraulic regulation under continuous 350 bar operation.
Core Highlights
- Genuine German Rexroth Design - Full interoperability with original systems
- DFR Compound Control - Integrated pressure & flow regulation for energy saving
- High Pressure Rating - 350 bar nominal / 400 bar peak pressure capability
- Through-Drive Option - Allows mounting of additional pumps up to same nominal size
- Low Noise & Long Service Life - Optimized bearing and sealing design
Model Code Breakdown
Understanding the A4VSO125DFR/30L-PPB25N00 configuration ensures correct replacement and system matching:
| Code Segment |
Meaning |
Specification |
| A4VSO |
Series |
Swashplate axial piston variable pump, open circuit |
| 125 |
Displacement |
125 cm³/r (125 mL/rev) |
| DFR |
Control Mode |
Pressure / Flow Control (Compound) |
| 30 |
Series Version |
30 Series (Standard industrial version) |
| L |
Rotation Direction |
Counter-clockwise (viewed on shaft end) |
| PPB25N00 |
Seal & Port Configuration |
NBR seals, SAE ports, standard flange, no through-drive |
Compatible with mineral oil (HLP) per DIN 51524. FKM (Viton) seals available upon request for phosphate ester or high-temperature fluids.
Technical Specifications
| Parameter |
Value |
Unit |
| Nominal Displacement (Vg max) |
125 |
cm³/r |
| Nominal Pressure (p nom) |
350 |
bar |
| Maximum Pressure (p max) |
400 |
bar |
| Maximum Speed (n max) |
1800 - 2200 |
rpm |
| Flow Rate @ 1500 rpm |
~187 |
L/min |
| Power Requirement @ 350 bar |
~109 |
kW |
| Torque @ 350 bar |
~696 |
Nm |
| Weight (approx.) |
~55 |
kg |
| Fluid Temperature Range |
-20 to +80 |
°C |
| Optimum Viscosity Range |
16 - 36 |
mm²/s |
| Oil Cleanliness Requirement |
ISO 4406 Class 20/18/15 or better |
-- |
Key Features & Benefits
Unlike standard fixed displacement pumps, the A4VSO125DFR adapts to system demand:
- Energy Efficiency: The DFR control prevents unnecessary energy loss by adjusting flow and pressure simultaneously, reducing heat generation in large hydraulic presses and power units
- Robust Suction Characteristics: Engineered for stable operation even under demanding inlet conditions, minimizing cavitation risk in mining, metallurgy, and offshore equipment
- Modular Maintenance: The Series 30 design allows easy replacement of control blocks without disconnecting the pump from piping, reducing downtime by up to 30%
- Quiet Operation: Optimized swashplate bearing and piston-shoe interface ensure low noise levels (<75 dB(A) typical at rated conditions)
Common Applications
This German Rexroth piston pump is widely used in:
- Industrial Presses - Ceramic tile presses, powder metallurgy forming, forging presses (high pressure holding)
- Metallurgy & Mining - Rolling mill auxiliary drives, cooling bed hydraulics, crusher lubrication systems
- Marine & Offshore - Deck machinery, winch drives, steering gear
- Plastic Injection Molding - High-flow clamping units and injection units
- Hydraulic Test Benches - Power units requiring precise variable flow and pressure control
Packaging & Quality Assurance
- Inspection: 100% performance tested on a calibrated hydraulic test bench before shipment (noise level, flow curve, pressure holding test)
- Packaging: Anti-rust VCI paper wrapping + heavy-duty plywood export crate (ISPM 15 compliant for sea/air freight)
- Warranty: 12-month limited warranty against manufacturing defects from date of shipment
- Documentation Included: Inspection certificate, packing list, and declaration of conformity
Frequently Asked Questions (FAQ)
Q: Is this A4VSO125DFR/30L-PPB25N00 a genuine German-made unit?
A: Yes, we supply original Rexroth Germany stock units with full traceability and serial numbers. Factory-authorized remanufactured units with equivalent performance are also available. Please specify your preference when inquiring.
Q: Can the DFR control be changed to DR or LR control?
A: Yes. The A4VSO125 housing supports interchangeable control covers (DR, LR, DFR, EO). However, internal orifice settings must be adjusted accordingly. We can supply pre-configured units to match your system requirements.
Q: What is the typical lead time for this pump?
A: For in-stock items: 1-3 business days. For non-stock or customized configurations (e.g., FKM seals, special shaft extensions): 2-4 weeks including full testing.
Q: Do you provide technical drawings or CAD files?
A: Yes. We can provide dimensional drawings and 3D models (STEP/IGES format) upon request for integration into your machine design.
