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The A4VSO71LR2/30L-PPB25N00 is an axial piston variable displacement pump (often referred to as a plunger pump in mining hydraulics) from the Rexroth A4VSO Series 30, manufactured in Germany, and designed for open-circuit hydrostatic drives in mining plunger systems, underground loaders, crusher power packs, and heavy industrial hydraulic stations.
It uses a swash plate design where output flow is proportional to drive speed and displacement, with stepless adjustment via swash plate angle. The LR2 control is a hyperbolic (constant-power) control: as system pressure rises, displacement automatically decreases to keep absorbed drive power near a preset constant value, protecting electric motors or diesel prime movers from overload while maximizing available flow at low pressure.
Rated at 350 bar nominal / 400 bar peak, it is built for continuous 24/7 duty under shock loads, dust, and wide temperature swings typical of mine sites.
Technical Specifications (Size 71, Series 30)
Parameter
Specification
Model
A4VSO71LR2/30L-PPB25N00
Series
A4VSO Series 30 (swash plate, open circuit)
Displacement (Vg max)
71 cm³/rev
Nominal Pressure
350 bar (35 MPa)
Peak Pressure
400 bar (40 MPa)
Maximum Speed
≈ 2200 rpm (size 71, dependent on suction conditions)
Flow @ 2200 rpm
≈ 156 L/min (theoretical)
Flow @ 1500 rpm
≈ 107 L/min (theoretical)
Power @ 350 bar / 2200 rpm
≈ 91 kW
Power @ 350 bar / 1500 rpm
≈ 62 kW
Torque @ 350 bar
≈ 395 Nm
Rotation
L - Left-hand (viewed from shaft end)
Control
LR2 - Hyperbolic constant-power control with mechanical power setting
Shaft
P - DIN metric parallel keyed shaft (DIN 6885)
Seals
P - NBR with FKM shaft seal (standard for mineral oil HLP)
Mounting Flange
B - ISO 3019-2 metric 4-bolt
Ports
25 - SAE B pressure + SAE S suction, side 90° offset, metric bolts, second pressure port B1 opposite B plugged with SAE blank flange
Through-drive
N00 - No auxiliary pump, no through-drive shaft
Fluid
Mineral oil (HLP); HFC permissible under reduced data
LR2 - Hyperbolic constant-power control (mechanical power setpoint, no remote pilot)
30 - Series 30 construction
L - Left-hand rotation
PPB25N00 - P: NBR+FKM seals; P: parallel key shaft; B: ISO 4-bolt flange; 25: SAE side-offset ports with B1 plugged; N00: no through-drive / no aux pump
Key Features
Made in Germany - Rexroth German production; original label, test sheet, and COO available on request.
LR2 Constant-Power Protection - Automatically reduces displacement as pressure rises to keep absorbed power near constant; mechanical power setpoint on the control cover.
Mining-Plunger Ready - Short control response, excellent suction characteristics, low noise, robust roller bearings for shock-load cycles in underground and surface mining.
350 bar Continuous Duty - Hardened cylinder block, heavy-duty bearings, optimized port geometry for 24/7 operation.
PPB25N00 SAE Side Ports - B1 opposite pressure port plugged with blank flange; simplifies hose routing in tight power-pack layouts.
Through-Drive Body (N00 base) - Base variant without tandem shaft; same-size tandem pumps available under other suffixes.
Modular A4VSO Platform - Same mounting envelope as DR/DFR/EO controls for retrofit without changing flange/hose layout.
Why Used in Mining Plunger Hydraulic Systems
Mining plunger systems (longwall roof supports, hydraulic props, emulsion plunger units feeding into pressure intensifiers) and mobile mining equipment require:
Prime-mover overload protection → LR2 keeps motor kW near constant across pressure swing.
High pressure (350 bar) with variable flow to reduce engine throttling and heat generation during idle/hold.
Left-hand rotation (L) matched to specific gearbox input orientation on popular mining drivelines.
PPB25N00 SAE side ports for straightforward hose routing in tight pump rooms.
German-origin reliability for 24/7 underground operation where downtime cost is high.
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Middle East
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Africa
South AfricaEgyptNigeriaKenyaMorocco
Incoterms: EXW / FOB / CIF / DDP. Freight: DHL/FedEx/UPS for single-unit urgent orders; LCL/FCL sea for project batches. Full export docs provided.
Frequently Asked Questions
Q: Is the A4VSO71LR2/30L-PPB25N00 made in Germany?
A: Yes. This configuration is produced in Rexroth Germany facilities. We provide original label photos, test report, and COO on request.
Q: What is the difference between LR2 and LR2G?
A: LR2 has a mechanical constant-power setpoint on the control cover. LR2G adds remote adjustability of the power setpoint via an external pilot pressure signal. Both follow a hyperbolic constant-power curve.
Q: Can LR2 replace a DR pump mechanically on the same mining power pack?
A: If displacement (71), rotation (L), shaft (P), flange (B), and ports (25) match, the pump mounts identically. Control logic changes from pressure-hold to constant-power--system relief valve must still be present and motor rating checked against LR2 curve.
Q: Does PPB25N00 use SAE or metric ports?
A: Code 25 = SAE B (pressure) and SAE S (suction) flanges on the side, 90° offset, with metric mounting bolts; second pressure port B1 opposite B is plugged with SAE blank flange. Adaptors to ORFS/NPT are common but not built-in.
Q: Lead time?
A: Stock units 1-3 working days; non-stock or bulk orders 1-2 weeks depending on quantity.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Total Annual:
1 million-10 millon
Employee Number:
>50
Ecer Certification：
Verified Supplier
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha... Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha...
