replacement rexroth A4V hydraulic pump

2 month ago

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

3 year

Product details

Rexroth A4VSO Series A4VSO40 A4VSO45 A4VSO71 A4VSO125 A4VSO180 A4VSO250 Hydraulic Piston Pump

Product description

Features

1 Variable pump with axial piston rotary group of swash-plate design for hydrostatic drives in open circuit

2. Flow is proportional to the drive speed and displacement.

3.The flow can be infinitely varied by adjusting the swash-plate angle.

4. Excellent suction performance

5. Low noise level

6. Long service life

67. Modular design

8. Variable through drive options

9. Visual swivel angle indicator

10. Freely variable installation position

11.Suitable for variable-speed drives

12. HF mode for reduced data possible for HFC mode, special version available

1. Overview of Rexroth A4V Series Hydraulic Pumps

TheA4V seriesis anaxial piston variable-displacement pumpdeveloped by Bosch Rexroth, widely used in construction machinery, industrial equipment, and marine applications. Key features include:

• Variable Control: Supports pressure, flow, or power control to adapt to dynamic loads.

• High-Pressure Performance: Rated pressure up to 350–400 bar, with higher peak pressure capabilities.

• Energy Efficiency: Swashplate design reduces energy loss and improves system efficiency.

• Modular Structure: Interchangeable control blocks, shaft seals, and other components for easy maintenance.

Typical Applications: Excavators, die-casting machines, injection molding machines, and marine steering systems.

2. Selection Principles for Replacement Pumps

When replacing an A4V pump, ensureperformance matching, interface compatibility, and control consistency. Key considerations include:

(1) Displacement and Power Matching

• Select a replacement pump with a displacement (e.g., A4V 25, 50, 71, 125) close to the original.

• Calculate required system power:

P=Q×p60×η P = \frac{Q \times p}{60 \times \eta} P=60×ηQ×p

(Q: Flow rate in L/min, p: Pressure in bar, η: Total efficiency, typically 0.85–0.9).

(2) Control Method Compatibility

• Pressure Control (DR): Constant pressure variable displacement for pressure-sensitive systems.

• Flow Control (FR): Constant flow variable displacement for speed-sensitive systems.

• Power Control (LR): Constant power variable displacement for multi-actuator systems.

• Electro-Proportional Control (EP): Supports PLC remote adjustment.

(3) Installation and Interface

• Verify compatibility ofshaft ends, flanges, and port sizeswith the original system.

• Check motor connection methods (direct coupling, coupling, or belt drive).

3. Recommended Replacement Brands and Models

(1) Direct Replacements (Rexroth and Compatible Brands)

【表格】

Original Model Replacement Model Brand Key Advantages

A4V 25 A4VG 25 Rexroth Upgraded version with 5% higher efficiency and 3dB lower noise

A4V 50 PVH50 Eaton Cost-effective, compatible with Rexroth control blocks

A4V 71 H1P 71 Parker Lightweight design, suitable for mobile equipment

A4V 125 SAUER 90R125 Sauer-Danfoss High-pressure durability for mining machinery

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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3 year

Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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