Rexroth A4VSO180LR2G/30L-PPB25N00 German Variable Axial Piston Pump
The Rexroth A4VSO180LR2G/30L-PPB25N00 is a genuine German-manufactured A4VSO series open-circuit axial piston variable pump, equipped with LR2G constant power (horsepower) limiting control with pilot pressure limitation. With a displacement of 180 cm³/r and PPB25 SAE flange & ports, the pump automatically reduces displacement as system pressure rises so that input power (pressure × flow) does not exceed a preset limit — and the power setpoint itself can be influenced/limited via an external pilot pressure signal.
This makes LR2G especially suitable for large industrial hydraulic power units driven by fixed-speed electric motors where motor overload protection is critical and where remote or pilot-assisted adjustment of the power limit is desired. Common in heavy presses, extrusion lines, and plant-wide hydraulic stations.
Technical Specifications
| Parameter | Value |
|---|
| Manufacturer | Rexroth, Made in Germany |
| Series | A4VSO - Open Circuit Swashplate Axial Piston Variable Pump |
| Model Code | A4VSO180LR2G/30L-PPB25N00 |
| Geometric Displacement (Vg max) | 180 cm³/r |
| Nominal Pressure | 350 bar |
| Peak Pressure | 400 bar |
| Maximum Speed (nnom) | Approx. 1800 rpm |
| Theoretical Flow @1500 rpm | Approx. 270 L/min |
| Theoretical Flow @1800 rpm | Approx. 324 L/min |
| Drive Power @350 bar & 1500 rpm | Approx. 158 kW |
| Control Type | LR2G - Constant Power (Horsepower) Limiting Control with Pilot Pressure Limitation (displacement ↓ as pressure ↑ to keep input power ≤ preset value; pilot port influences setting) |
| Rotation | L - Left-hand (viewed from shaft end) |
| Flange & Port | PPB25 - SAE Flange & SAE Port (larger porting) |
| Through Drive | N00 - Without Through Drive (tandem-ready variants available on other A4VSO codes) |
| Hydraulic Fluid | Mineral Oil HLP, HFC Water-Glycol Permissible (Derated) |
| Approximate Weight | 102-103 kg |
A4VSO180DFR/30R-FKD75U99E
A4VSO180DFR/30R-PKD63K05E
A4VSO180DFR/30R-PKD63K21E
A4VSO180DFR/30R-PKD63K38
A4VSO180DFR/30R-PKD63K38E
A4VSO180DFR/30R-PKD63N00
A4VSO180DFR/30R-PPB13KB4E
A4VSO180DFR/30R-PPB13N00E
A4VSO180DFR/30R-VKD75U99E
A4VSO180DP/30R-PKD63N00
A4VSO180DP/30R-PKD63N00ES1406
A4VSO180DP/30R-PSD63K78
A4VSO180DP/30R-PSD63K99
A4VSO180DP/30R-PSD63N00
A4VSO180DR/22R-PZB13K34
A4VSO180DR/30R-FKD63N00E
A4VSO180DR/30R-FKD75U99E
A4VSO180DR/30R-PKD63K03
A4VSO180DR/30R-PKD63N00E
A4VSO180DR/30R-PKD63N00E
A4VSO180DR/30R-PKD63N00E
A4VSO180DR/30R-PKD63N00E
A4VSO180DR/30R-PKD63N00E
A4VSO180DR/30R-PKD63N00E
A4VSO180DR/30R-PKD63N00ESO103
A4VSO180DR/30R-PKD63N00ESO127
A4VSO180DR/30R-PKD63N00-SO127
A4VSO180DR/30R-PPB13N00
A4VSO180DR/30R-PPB13N00E
A4VSO180DR/30R-PPB13N00E
A4VSO180DR/30R-PPB13N00E
A4VSO180DR/30R-PPB13N00E
A4VSO180DR/30R-PPB13N00E
A4VSO180DR/30R-PPB13N00E
A4VSO180DR/30R-PSD63K07E
A4VSO180DR/30R-VKD63I60
A4VSO180DR/30R-VKD63K24
A4VSO180DR/30R-VKD63K70E
A4VSO180DR/30R-VKD63K70E
A4VSO180DR/30R-VKD63N00
A4VSO180DR/30R-VKD63N00E
A4VSO180DR/30R-VKD63N00E
A4VSO180DR/30R-VKD63N00E
A4VSO180DR/30R-VKD75U99E
A4VSO180DR/30R-VKD75U99ESO103
A4VSO180DR/30R-VSD75U99E
A4VSO180DR/30R-VSD75U99E
A4VSO180DRG/22R-PZB13N00
A4VSO180DRG/30R-FKD75U99E
A4VSO180DRG/30R-PKD63K03E
A4VSO180DRG/30R-PKD63K03E
A4VSO180DRG/30R-PKD63K05ESO91
A4VSO180DRG/30R-PKD63K21
A4VSO180DRG/30R-PKD63K21E
A4VSO180DRG/30R-PKD63K21E
A4VSO180DRG/30R-PKD63K21E
A4VSO180DRG/30R-PKD63K38
A4VSO180DRG/30R-PKD63K70E
A4VSO180DRG/30R-PKD63K70E
A4VSO180DRG/30R-PKD63K78
A4VSO180DRG/30R-PKD63N00E
A4VSO180DRG/30R-PKD63N00E
A4VSO180DRG/30R-PPB13N00
A4VSO180DRG/30R-PPB13N00E
A4VSO180DRG/30R-PPB13N00ESO171
LR2G Constant Power Control - Key Benefits
Compared to basic LR2, LR2G adds pilot pressure limitation capability:
- Pump automatically de-strokes as pressure rises to keep motor input power below a preset kW/hp limit
- Pilot pressure connection allows the power limit to be influenced or capped externally (e.g. from a central hydraulic control system)
- Prevents electric motor overload/tripping during high-pressure hold or stall
- Delivers full flow at low pressure → gradually reduces flow at high pressure → maximizes usable hydraulic output within motor constraints
- Ideal for fixed-speed AC motor drives sized close to the pump's theoretical max power
➡ PPB25 SAE porting is selected when system plumbing uses larger SAE flanges for minimized pressure drop at high flow.
Typical Applications
- Heavy hydraulic presses (forging, extrusion, molding) with fixed-power electric drives
- Industrial hydraulic power units (HPU) in continuous-process plants
- Metal forming and stamping lines
- Large plastic injection molding machines (clamp/aux pump)
- Testing laboratories simulating load-limited hydraulic power sources
- General heavy industry requiring motor overload protection with pilot influence
Global Distribution
Distributed through Rexroth's authorized global dealer network, including:
- Europe: Germany, Italy, France, UK, Spain, Netherlands, Austria, Switzerland, Poland, Czech Republic, Sweden
- Asia-Pacific: China, Japan, South Korea, India, Taiwan, Thailand, Malaysia, Vietnam, Indonesia, Australia
- Americas: USA, Canada, Mexico, Brazil, Chile (industrial regions)
- Middle East & Africa: UAE, Saudi Arabia, Turkey, South Africa
Frequently Asked Questions
Q1: What is the difference between LR2 and LR2G on A4VSO pumps?
A1: Both limit input power. LR2G additionally provides a pilot pressure port so the power limit can be influenced or externally constrained — useful for centralized HPUs or systems where multiple pumps' power sharing is managed from a common pilot source.
Q2: Can LR2G prevent my electric motor from burning out?
A2: Yes, when correctly set. LR2G ensures the pump will not draw more power than the preset value, helping avoid motor overload during high-pressure hold — provided the LR2G power setting matches your motor's rated capacity.
Q3: Is a pressure relief valve still required?
A3: Yes. A system pressure relief valve is still necessary as ultimate overpressure protection, even with LR2G control.
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