A4VSO125DRG/30L-PPB13N00 Hydraulic Piston Pump Mining Motor German Rexroth
The Rexroth A4VSO125DRG/30L-PPB13N00 is a genuine German-manufactured A4VSO series open-circuit axial piston variable pump, equipped with DRG pressure compensated control and remote pilot pressure setting. With a displacement of 125 cm³/r and PPB13 SAE compact flange & ports, this pump maintains a preset system pressure by reducing displacement toward zero once pressure is reached, while also allowing the pressure setpoint to be adjusted remotely via pilot port X.
In mining applications — such as coal preparation plant HPUs, conveyor tensioning systems, crusher clamp circuits, and mine winder auxiliary hydraulics — the DRG function is valuable because plant operators can change system pressure from a central control room without accessing the pump skid. The compact PPB13 porting integrates cleanly into manifold-mounted mining HPU skids. Rated for 350 bar continuous / 400 bar peak.
Technical Specifications
| Parameter |
Value |
| Manufacturer |
Rexroth, Made in Germany |
| Series |
A4VSO - Open Circuit Swashplate Axial Piston Variable Pump |
| Model Code |
A4VSO125DRG/30L-PPB13N00 |
| Geometric Displacement (Vg max) |
125 cm³/r |
| Nominal Pressure |
350 bar |
| Peak Pressure |
400 bar |
| Maximum Speed (nnom) |
Approx. 1900-2000 rpm |
| Theoretical Flow @1500 rpm |
Approx. 187.5 L/min |
| Theoretical Flow @1800 rpm |
Approx. 225 L/min |
| Drive Power @350 bar & 1500 rpm |
Approx. 109 kW |
| Control Type |
DRG - Pressure Compensated Control with Remote Pilot Pressure Setting (spring-set base pressure + pilot port X for remote adjustment) |
| Rotation |
L - Left-hand (viewed from shaft end) |
| Flange & Port |
PPB13 - SAE Flange & SAE Port (compact porting, smaller than PPB25) |
| Through Drive |
N00 - Without Through Drive (tandem-ready variants available on other A4VSO sizes) |
| Hydraulic Fluid |
Mineral Oil HLP, HFC Water-Glycol Permissible (Derated — accepted in many mine hydraulic specs) |
| Approximate Weight |
75-78 kg |
Related Models
DRG Remote Pilot Pressure Control - Benefit for Mining HPUs
Standard DR requires manual spring adjustment. DRG adds remote pilot capability:
- Base pressure set by internal spring (minimum)
- Applying pilot pressure to port X raises the effective pressure setpoint proportionally
- Allows pressure changeover from a mine control room, PLC, or pilot-operated relief valve — no need to open the HPU enclosure or adjust the pump mechanically
- Pump strokes to near-zero at set pressure → minimizes heat generation during hold
- Built-in pressure limitation for system safety
➡ Particularly useful on centralized mine plant HPUs feeding multiple circuits with different pressure requirements (e.g. conveyor tension vs. crusher clamp vs. lubrication).
Typical Applications
- Mining & Mineral Processing: coal prep plant HPUs, conveyor belt tensioning, crusher / screen clamp hydraulics, thickener rake drives, mine winder auxiliary circuits
- Heavy Industrial HPUs: press clamp/hold circuits, filter press hydraulics, stamping line aux pumps
- Process Plants: centralized hydraulic stations with multi-pressure-level operation
- Test Benches: where pressure setpoint must be changed frequently without manual adjustment
- Retrofit: upgrading manual DR pumps to remotely adjustable DRG for automation readiness
Global Sales Countries / Regions
Distributed through Rexroth's authorized global dealer network, including:
- Europe: Germany, Poland, Czech Republic, Italy, France, UK, Spain, Netherlands, Sweden (mining sector)
- Asia-Pacific: China, Australia (major mining market), India, Indonesia, Japan, South Korea, Thailand, Vietnam
- Americas: USA, Canada, Mexico, Brazil, Chile (copper/gold mining regions)
- Middle East & Africa: South Africa (mining heartland), UAE, Turkey
Frequently Asked Questions
Q1: What is the difference between DR and DRG on A4VSO pumps?
A1: DR has a mechanical spring adjustment only — pressure is changed by turning the screw. DRG includes a pilot port X so the pressure setpoint can be remotely increased by applying pilot pressure, in addition to the spring preload. This enables centralized or automated pressure control.
Q2: Can DRG be used without pilot pressure connected?
A2: Yes. Without pilot pressure on port X, the pump regulates to the spring-adjusted base pressure. Applying pilot pressure raises the effective set pressure up to the max allowed by the spring range.
Q3: What is the difference between PPB13 and PPB25?
A3: Both are SAE flanges/ports. PPB13 is the compact SAE port size, preferred for manifold-mounted skids in plant/mine HPUs; PPB25 uses larger SAE ports for high-flow piped systems. Pump performance is identical.
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