Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.
| Payment Terms | Western Union,T/T,D/P,D/A,L/C |
| Supply Ability | 100 |
| Delivery Time | 2 weeks |
| Packaging Details | wooden box |
| Country of Origin | Germany |
| Weight | 184 kg |
| Operating Temperature | -20°C to +80°C |
| Hydraulic Fluid | Mineral oils (HL, HLP), HFD (Synthetic) |
| Seal Material | FKM (Viton) |
| Brand Name | Rexroth |
| Model Number | R910999472 AA4VSO250LR2D/30R-VPB13N00 |
| Certification | ISO |
| Place of Origin | German |
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Product Specification
| Payment Terms | Western Union,T/T,D/P,D/A,L/C | Supply Ability | 100 |
| Delivery Time | 2 weeks | Packaging Details | wooden box |
| Country of Origin | Germany | Weight | 184 kg |
| Operating Temperature | -20°C to +80°C | Hydraulic Fluid | Mineral oils (HL, HLP), HFD (Synthetic) |
| Seal Material | FKM (Viton) | Brand Name | Rexroth |
| Model Number | R910999472 AA4VSO250LR2D/30R-VPB13N00 | Certification | ISO |
| Place of Origin | German | ||
| High Light | Rexroth piston pump German original ，AA4VSO250LR2D piston pump hydraulic ，VPB13N00 piston pump industrial | ||
|
Parameter |
Specification |
|---|---|
|
Manufacturer / Series |
Rexroth A4VSO Series 30 (Industrial Heavy-Duty) |
|
Order Code |
R910999472 |
|
Full Model |
AA4VSO250LR2D/30R-VPB13N00 |
|
Pump Type |
Axial Piston Variable Pump (Swashplate Design, Open Circuit) |
|
Control Type |
LR2D (Power Control / Load-Sensing with Hyperbolic Characteristic) |
|
Max. Displacement |
250 cm³/rev |
|
Nominal Pressure |
350 bar |
|
Peak Pressure |
400 bar (Intermittent) |
|
Nominal Size |
NG 250 |
|
Rotation Direction |
Right-hand (R, Clockwise, viewed from shaft end) |
|
Shaft Type |
Parallel Keyed Shaft (DIN 6885) |
|
Ports |
S (Suction), B (Pressure), L (Case Drain), LS (Load-Sensing) |
|
Port Size |
Code 13 (SAE Flange, Metric Threads) |
|
Mounting Flange |
ISO 3019-2 / SAE 4-bolt |
|
Max. Speed |
1500 rpm (at Vg max) |
|
Max. Flow |
~375 L/min (at 1500 rpm) |
|
Seal Material |
FKM (Viton) |
|
Hydraulic Fluid |
Mineral oils (HL, HLP), HFD (Synthetic) |
|
Operating Temperature |
-20°C to +80°C |
|
Weight |
Approx. 184 kg |
|
Country of Origin |
Germany |
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Q1: What is the function of the "LR2D" control? How does it differ from DRG?
A: The LR2D is a sophisticated Power Control (Load-Sensing). Unlike the DRG (Pressure Control) which maintains constant pressure, the LR2D automatically adjusts the pump's displacement to maintain a constant pressure margin (Δp) above the load pressure. This ensures the pump delivers only the flow and pressure needed by the system, resulting in significant energy savings. The "D" suffix indicates a specific control characteristic (hyperbolic curve) optimized for high efficiency.
Q2: What does the "VPB13N00" suffix indicate?
A: This code defines the mechanical configuration:
V: FKM (Viton) seals, offering superior chemical and high-temperature resistance compared to standard NBR (P).
P: Standard parallel key shaft (DIN 6885).
B13: Port size code 13 (SAE flange ports with metric threads).
N00: No through-drive (solid shaft end, cannot mount additional pumps on the shaft).
Q3: What is the key application advantage of the LR2D control?
A: The primary advantage is energy efficiency in variable flow systems. It is ideal for machines where the load pressure varies but a constant flow is not always required (e.g., injection molding machines, large presses). It prevents unnecessary high-pressure flow during idle or low-load periods, reducing heat generation and power consumption compared to simple pressure-compensated (DR) pumps.
Q4: How do I connect the LS (Load-Sensing) port?
A: The LS port must be connected to the highest load pressure point in the system (typically after the directional valve). This feedback signal tells the pump how much pressure to generate. Important: The LS line must be protected with a pressure relief valve (typically 400 bar) and a damping orifice to ensure stable control.
Q5: Can this pump be used in a closed-loop hydrostatic system?
A: No. The A4VSO LR2D is designed exclusively for open-circuit applications (pump → valve → actuator → tank). For closed-loop hydrostatic transmissions (e.g., travel drives), you would need an A4VG or A2FM series unit.
Company Details
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...
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