A4VSO250LR2N30RPPB13N00

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

4 year

Product details

A4VSO250LR2N Hydraulic Piston Pump

Model: A4VSO250LR2N30RPPB13N00

Application Fields:

• Steel and Metallurgy: Used in hydraulic systems for smelting, rolling, and material handling processes.

• Forging and Press Machinery: Powers high-force forming operations in metal forging and stamping equipment.

• Marine, Hydropower, and Water Conservancy Gate Systems: Provides reliable hydraulic control for ship steering gear, dam gates, and flood control mechanisms.

• Ceramic and Refractory Hydraulic Presses: Enables precise pressure application in ceramic tile production and refractory material molding.

• Vulcanizing Presses: Supports rubber curing processes with stable high-pressure output.

• Paper Manufacturing Equipment: Drives hydraulic systems in paper rollers, calenders, and coating machines.

• Petroleum and Petrochemical Machinery: Used in drilling rigs, pipeline valves, and offshore platform hydraulic systems.

• Construction and Mobile Machinery: Powers excavators, cranes, pavers, and other heavy-duty equipment.

• Railway and Tunnel Boring Machines (TBMs): Provides thrust and steering hydraulics for shield tunneling and track-laying operations.

• Mining Equipment: Supports hydraulic systems in loaders, crushers, and conveyor systems for ore extraction and transport.

Product Features: 1. Axial piston pump with swashplate design for hydraulic drive in open circuit
2. Optional installation location
3. Excellent oil absorption characteristics
4. Low noise level
5. Long service life
6. Modular design
7. Short response time
8. Variable speed drive options
9. Visible swing angle indicator
10. The flow rate is proportional to the input transmission speed and displacement. By adjusting the swashplate angle, the output flow can be steplessly adjusted.
11. Use of HF oil in the case of reduced operating data There is a special model that can be used to run with HFC oil.

1. Product Overview

TheA4VSO250LR2N/30R-PPB13N00is aswashplate-type axial variable-displacement piston pumpmanufactured by Bosch Rexroth, part of the A4VSO series. Designed for open-circuit hydraulic systems, it is widely used in applications requiring high pressure, large flow rates, and flow adjustability, such as construction machinery, metallurgical equipment, marine machinery, and mining machinery.

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2. Key Specifications

1. Displacement: 250 mL/rev (other options: 40, 71, 125, 180, 355 mL/rev).

2. Rated Pressure: 35 MPa (peak pressure up to 42 MPa).

3. Speed Range: Typically 800–1,800 rpm (varies by application).

4. Control Modes:

• LR (Constant Power Control): Automatically adjusts displacement based on load changes to maintain constant power.

• Other options: DR (constant pressure control), EO2 (electro-hydraulic proportional control).

5. Variable Displacement: Achieved by adjusting the swashplate angle, with an angle indicator provided.

6. Structural Features:

• Through-shaft design for stacking multiple pumps.

• Spherical valve plate for self-centering and high efficiency.

• Long-life, high-precision full-complement roller bearings.

7. Fluid Requirements:

• Suitable media: Mineral oil, water-glycol (cleanliness level NAS 9).

• Temperature range: -20°C to +80°C (varies by seal material).

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3. Performance Advantages

1. Energy Efficiency:

• Variable displacement design reduces energy waste by adjusting flow based on demand.

• Constant power control (LR mode) optimizes energy consumption, ideal for fluctuating loads.

2. High Reliability:

• Swashplate and spherical valve plate design minimize wear, extending service life.

• Robust materials for bearings and critical components ensure durability in harsh conditions.

3. Low Noise Operation:

• Optimized flow path design reduces hydraulic shock and noise levels.

4. Modular Design:

• Supports multi-pump combinations for easy system integration and scalability.

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4. Typical Applications

1. Construction Machinery:

• Main or auxiliary pumps for excavators, cranes, road rollers, and concrete pump trucks.

2. Metallurgical Equipment:

• Hydraulic systems for rolling mills, continuous casters, and forging presses.

3. Marine Machinery:

• Steering gear, deck machinery, and ship crane hydraulic drives.

4. Mining Machinery:

• Hydraulic control for roadheaders, shearers, and hoists.

5. Other Fields:

• Oilfield equipment, paper machines, tunnel boring machines (TBMs), and ceramic presses.

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5. Selection and Usage Recommendations

1. Selection Criteria:

• Determine displacement, pressure rating, and control mode based on system requirements.

• Example: Choose DR for constant pressure control or LR for energy optimization.

2. Installation and Commissioning:

• Ensure alignment error between pump shaft and driving motor ≤0.1 mm.

• Prime the pump with oil before initial startup to avoid dry friction.

3. Maintenance and Care:

• Replace hydraulic oil every 1,000–3,000 operating hours or 6 months (whichever comes first).

• Monitor pump temperature and noise; investigate bearing or valve plate wear if abnormalities occur.

• Clean the oil tank and filters to prevent contamination (cleanliness level NAS 9).

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