LD-A4VG125 125cc High Pressure Closed Circuit Variable Piston Pump | Heavy-Duty Construction Hydraulic Pump HYDSUNRIDA

LD-A4VG125 125cc High Pressure Closed Circuit Variable Piston Pump | Heavy-Duty Construction Hydraulic Pump HYDSUNRIDA

 HYDSUNRIDA LD-A4VG125 125cc large displacement closed circuit variable piston pump, 400bar nominal & 450bar peak pressure, 1:1 OEM replacement, ISO9001 & SGS certified, factory direct supply for construction and mining heavy machinery.SEO Meta Long: Premium LD-A4VG125 125cc high-pressure closed circuit hydraulic piston pump. 1:1 non-destructive replacement for imported pumps, strict factory testing, heavy-load resistance, cost-effective factory price and full after-sales service for engineering and mining equipment.

1. Product Overview

LD-A4VG125 is a heavy-duty closed-circuit variable piston pump with 125cc large displacement and 400bar rated pressure. It stably supports 24/7 full-load continuous operation for ultra-heavy industrial and construction hydraulic systems.Featuring ultra-large flow, low leakage and high efficiency, LD-A4VG125 realizes 1:1 non-destructive replacement of standard A4VG125 hydraulic pumps. No equipment modification or system debugging is required to reduce overall operational costs.

2. Quality Certification & Testing

LD-A4VG125 is ISO9001 & SGS certified, manufactured strictly in accordance with national hydraulic standards for industrial-grade stable and reliable quality.Every pump undergoes four strict factory tests: high pressure resistance, flow calibration, leakage inspection and long-term endurance testing, ensuring ultra-low failure rates under extreme heavy-load working conditions.

3. Core Technical Parameters & Control Modes

3.1 Basic Specifications

• Rated Displacement: 125 ml/r (Large displacement for heavy-duty closed circuit systems)

• Nominal Pressure: 400 bar

• Peak Pressure: 450 bar

• Structure: Axial piston variable design, built-in charge pump & pressure cut-off valve, high rigidity, easy maintenance

• Applicable Circuit: Closed hydraulic circuit

• Hydraulic Oil Viscosity: 35-55 mm²/s

• Working Performance: 24h non-stop full-load continuous heavy-duty operation

• Warranty: 12-month complete machine warranty

3.2 Control Modes

• DA Speed Sensing Control: Automatic speed adaptive regulation for stable machinery operation

• EZ Proportional Control: Precise electro-mechanical proportional adjustment

• HD Hydraulic Control: Sensitive hydraulic servo control for heavy-load conditions

4. Core Advantages

4.1 1:1 Zero-Modification Replacement

Fully compatible with standard A4VG125 mounting dimensions and performance parameters. Directly replaces imported pumps without modification, saving procurement and equipment upgrade costs.

4.2 Factory Direct Supply

Original factory direct sales with competitive pricing. Sufficient spot stock supports fast delivery and large-batch bulk orders.

4.3 Extreme Heavy-Load Durability

High-strength alloy core components and precision mirror grinding deliver excellent pressure resistance, wear resistance and impact resistance, ensuring long service life for continuous ultra-heavy duty operation.

4.4 Low Heat & High Efficiency

Optimized large-flow variable structure features low internal leakage and low heat generation, improving system efficiency and running stability for long-time heavy-load work.

4.5 Custom OEM/ODM Service

Customizable pressure and flow parameters are available to fit standard and non-standard heavy-duty engineering equipment and complex working conditions.

4.6 Full-Cycle After-Sales Service

Complete professional support including free model selection, installation guidance and long-term technical after-sales service.

5. Full Series Standard Models (LD Upgrade Version)

LD-A4VG125 is HYDSUNRIDA upgraded version with higher precision, better sealing and stronger overload durability than ordinary standard pumps.

5.1 DA Speed Sensing Control Series

LD-A4VG125DA1D3L/32R-NZCXX, LD-A4VG125DA2D3L/32R-NZCXX, LD-A4VG125DA1D2L/32R-NZCXX, LD-A4VG125DA2D2L/32R-NZCXX

5.2 EZ Proportional Control Series

LD-A4VG125EZ1D3L/32R-NZCXX, LD-A4VG125EZ2D3L/32R-NZCXX, LD-A4VG125EZ1D2L/32R-NZCXX, LD-A4VG125EZ2D2L/32R-NZCXX

5.3 HD Hydraulic Control Series

LD-A4VG125HD3D3L/32R-NZCXX, LD-A4VG125HD2D3L/32R-NZCXX, LD-A4VG125HD3D2L/32R-NZCXX

5.4 General Standard Series

LD-A4VG125 32R-NZCXX, LD-A4VG125 32N-NZCXX, LD-A4VG125-NZCXX

6. Application Fields

Widely applied in construction machinery, mining equipment, concrete pump trucks, heavy industrial machine tools, port machinery and hydraulic test benches. Ideal for imported pump replacement and domestic substitution of heavy-load closed-circuit hydraulic systems.