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{"title":"Original Imported Rexroth Germany 28cc Displacement High Pressure Piston Pump","imgUrl":"https:\/\/img.chinax.com\/nimg\/3c\/31\/ce4468ef1718a9f6b74e4c9414a7-200x200-1\/original_imported_rexroth_germany_28cc_displacement_high_pressure_piston_pump_with_100_25_tested_great_performance_and_up_to_80_c2.jpg","attrs":{"Brand Name":"Rexroth","Model Number":"A2FO80\/61L-VQDN55 A2FO80\/61R-VQDN55 A2FO90\/61R-VUDN55 A2FO90\/61R-PBB05 A2FO90\/61L-PBB05","Certification":"ISO","Place of Origin":"Germany"}}
{"title":"German Rexroth Industrial Hydraulic Piston Pump with 12 Months Warranty 100%","imgUrl":"https:\/\/img.chinax.com\/nimg\/c5\/22\/7b29d922c10b11ac94ce0beec2ac-200x200-1\/german_rexroth_industrial_hydraulic_piston_pump_with_12_months_warranty_100_25_tested_great_performance_and_threaded_or_flanged_in.jpg","attrs":{"Brand Name":"Rexroth","Model Number":"A2FO90\/61R-PAB05 A2FO90\/61L-PAB05 A2FO90\/61R-PBB05 A2FO90\/61R-VBB05 A2FO90\/61R-VQDN55","Certification":"ISO","Place of Origin":"German"}}
{"title":"A4VSO71EO1\/30L-PPB13N00 A4VSO71LR2\/30L-PPB25N00 German piston bar axial","imgUrl":"https:\/\/img.chinax.com\/nimg\/35\/dd\/d32d0532f1879d4c55968ff91d80-200x200-1\/a4vso71eo1_2f30l_ppb13n00_a4vso71lr2_2f30l_ppb25n00_german_piston_bar_axial_excavator_motor_rexroth_brand_new_original_warranty_fo.jpg","attrs":{"Brand Name":"Rexroth","Model Number":"A4VSO71EO1\/30L-PPB13N00 A4VSO71LR2\/30L-PPB25N00","Certification":"ISO9001","Place of Origin":"German"}}
{"title":"German Rexroth ISO9001 Certified Piston Pump for Mobile and Industrial Hydraulic","imgUrl":"https:\/\/img.chinax.com\/nimg\/73\/0e\/c4fe575b539956cb89a167a3ff3d-200x200-1\/german_rexroth_iso9001_certified_piston_pump_for_mobile_and_industrial_hydraulic_systems_with_clockwise_or_counterclockwise_rotati.jpg","attrs":{"Brand Name":"Rexroth","Model Number":"A2FO107\/61R-NBD55 A2FO107\/61R-PPB05 A2FO107\/61R-VPB05 A2FO107\/61R-VSD55 A2FO107\/61L-VSD55","Certification":"ISO","Place of Origin":"German"}}
DR -- Pressure Compensator (Constant Pressure Control): Below set pressure -> full displacement; at set pressure -> swashplate de-strokes to maintain pressure
Mechanical Interface
Shaft Type
Parallel Key Shaft (DIN 6885)
Rotation Direction
L = Counter-Clockwise (CCW) -- viewed from shaft end
Mounting Flange
ISO 3019-2 (4-bolt, metric)
Port Configuration
PPB13: SAE flanged ports, metric screws, Series 13 port plate
Through Drive
N00 = No through-drive (cannot mount auxiliary pump on rear)
Seals & Media
Seal Material
NBR (Nitrile Rubber) -- standard for mineral oil
Compatible Fluids
Mineral oils (HL/HLP), HFC (Water Glycol with derating); NOT compatible with HFD (Phosphate Ester)
Oil Temperature Range
−20 °C to +70 °C (with NBR seals)
Fluid Cleanliness Required
ISO 4406 17/15/12 or cleaner (equivalent to NAS 1638 Class 7)
Physical Data
Approximate Weight
240 kg
Case Drain Ports
2 × G1/2 (use one to tank, plug the other; backpressure ≤ 0.5 bar)
Recommended Suction Line
≥ DN80/DN100, as short and straight as possible, with 100 mesh (149 µm) suction strainer
Model Code Breakdown
A4VSO 500 DR / 30 L - PPB13 N00
│ │ │ │ │ │ └── No through-drive
│ │ │ │ │ └── PPB13: SAE flanged ports / metric screws / Series 13
│ │ │ │ └── L: Counter-Clockwise (CCW) viewed from shaft end
│ │ │ └── 30: Series code (size group / design generation)
│ │ └── DR: Pressure Compensator (constant pressure), local mechanical adjustment
│ └── 500 cm³/rev geometric displacement
└── A4VSO: Open Circuit Variable Axial Piston Pump (Heavy-Duty Industrial)
Frequently Asked Questions
Q1: Can this A4VSO500DR be used as a hydraulic motor? Can it pump water?
❌ Not usable as a motor: The A4VSO is designed exclusively as a pump for open-circuit operation. Driving it in reverse as a motor will not produce useful torque and will cause internal damage.
❌ Strictly prohibited for pumping water: Axial piston pumps rely on oil film lubrication between moving parts (pistons/cylinder barrel/valve plate). Water will:
Destroy lubrication -> immediate seizure of copper-steel friction pairs
Cause corrosion and rusting of precision surfaces
Swell standard NBR seals, causing leakage
For high-pressure water applications, use dedicated plunger pumps or centrifugal pumps -- never a hydraulic piston pump.
Q2: What is the difference between DR, DFR, and LR2 control? When should I choose DR?
DR (this model): Pressure compensator only. Below set pressure -> full flow; at set pressure -> pump de-strokes to maintain constant pressure (delivering only leakage compensation flow). Best for: Simple pressure-limiting systems (presses, power units) where load sensing is not needed.
DFR / LR2: Adds Load Sensing (LS) function. The pump maintains a constant differential pressure (∆p ≈ 14-18 bar) between pump outlet and the LS signal from the valve bank, delivering only the flow demanded by the system. Best for: Multi-actuator valve-controlled systems (injection molding, machine tools) where energy saving matters.
When to choose DR: Your system has no LS signal line, requires only pressure limitation, or simplicity/reliability is prioritized over energy efficiency.
Q3: How do I verify counter-clockwise rotation (30L)? What happens if I run it backward?
L = Counter-Clockwise (CCW): Facing the drive shaft end (coupling side looking into the pump), the shaft must rotate counter-clockwise.
Verify by checking the motor/engine rotation arrow (usually stamped on the fan cover) or perform a brief jog test.
❌ Reverse rotation will cause catastrophic failure within seconds:
The internal port plate is asymmetrical -- reverse rotation misaligns suction and pressure ports
Lubrication passages are directional -- loss of lubrication causes immediate seizure
Cavitation and dry running destroy the cylinder barrel/piston assembly
If rotation is wrong, swap motor phases or replace with an "R" (clockwise) pump. Never attempt to run in reverse.
Q4: What are the critical suction (inlet) requirements for this 500 cc pump?
Large displacement pumps are extremely sensitive to inlet conditions:
Minimum absolute inlet pressure ≥ 0.8-1.0 bar (gauge ≈ −0.2 to −0.1 bar max vacuum).
For speeds above 1200 rpm, a boost pump / charge pump providing 1.5-2 bar positive head is strongly recommended.
Suction line design:
Inner diameter ≥ DN80 (DN100 preferred)
Length as short as possible (< 1.5 m), minimize elbows
Dedicated 100 mesh (149 µm) suction strainer with pressure loss < 0.05 bar
Tank outlet should be above pump inlet or submersion depth > 300 mm.
Q5: How should the case drain be connected? What if I ignore it?
Case drain carries internal leakage for cooling and flushing wear debris.
Must be routed via a dedicated line directly to the reservoir (no shared return lines).
Backpressure must be ≤ 0.5 bar (ideally 0 bar). The second drain port must be plugged.
❌ Never:
Block the drain port
Connect to a pressurized return line
Share a long small-diameter return line with other components
Consequence of blocked/pressurized drain: Housing pressure buildup -> shaft seal blowout, valve plate distortion, bearing overheating, and total pump failure.
Reduced lubricity of HFC -> shorter oil change intervals
❌ HFD (Phosphate Ester): NBR will swell and degrade rapidly -> FKM (Viton) seals are mandatory (specify /V suffix or FKM option when ordering)
Mineral oil (HL/HLP) is the standard intended fluid for this model -- no special measures needed.
Q8: What are the essential commissioning steps?
Fill and vent: Loosen case drain fitting and high-pressure port bleed screw. Manually rotate shaft while filling until oil emerges without bubbles.
Confirm case drain return: Verify drain line is connected to tank and unobstructed.
Jog for rotation check: Briefly energize motor to confirm CCW (L) rotation. Listen for abnormal noise.
Low-pressure run-in: Back off DR adjustment screw (reduce pressure setting). Run at low pressure while cycling system to purge air.
Gradual pressurization: Slowly turn DR screw clockwise to raise pressure to target. Monitor noise, temperature, and case drain flow.
Lock and record: Once set, tighten lock nut and record the pressure setting for future reference.
For other Rexroth models (A10VSO, A4VG, A11VO, A2FM motors, proportional valves, amplifiers, valve blocks), please provide the complete model number.
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...
