LD-A4VSO250 250cc High Pressure Open Circuit Variable Piston Pump | Heavy-Duty Hydraulic Pump HYDSUNRIDA

LD-A4VSO250 250cc High Pressure Open Circuit Variable Piston Pump | Heavy-Duty Hydraulic Pump HYDSUNRIDA

 HYDSUNRIDA LD-A4VSO250 250cc large displacement open circuit piston pump, 350bar rated & 400bar peak pressure, DR constant pressure control, 1:1 imported pump replacement, factory direct supply for heavy industrial and mining equipment. LD-A4VSO250 high-pressure open circuit variable piston pump with 250cc displacement and full through-drive design. Stable DR pressure control, heavy-load resistance and strong expandability, ideal for metallurgy, shield tunneling, mining and port machinery imported pump substitution.

1. Product Overview

LD-A4VSO250 is a heavy-duty open-circuit variable piston pump with 250cc large displacement. Rated at 350bar (400bar peak), it supports 24/7 full-load continuous extreme operation with built-in DR constant pressure control.It achieves 1:1 non-destructive replacement for standard A4VSO 22-series pumps with fully compatible mounting dimensions. Factory direct supply cuts intermediate costs for high-cost-performance hydraulic upgrades.

2. Quality Certification & Testing

LD-A4VSO250 holds ISO9001 and SGS certifications, fully compliant with international industrial hydraulic standards.Every unit passes strict pressure, stabilization, leakage and endurance tests, ensuring stable performance without pressure drop or jitter under long-term heavy loads.

3. Core Technical Parameters & Control Modes

3.1 Basic Specifications

• Rated Displacement: 250 ml/r (Super-large displacement for ultra-heavy duty)

• Nominal Pressure: 350 bar

• Peak Pressure: 400 bar

• Max Speed: 1500 rpm

• Net Weight: 115Kg

• Oil Port Layout: Dual-side arrangement

• Rotation Direction: R (Clockwise)

• Applicable Circuit: Open hydraulic circuit

• Through-Drive Feature: 100% full through-shaft series drive available

• Warranty: 12-month complete machine warranty

3.2 Control Mode

• DR Constant Pressure Control: Stepless adjustable pressure, automatic displacement stabilization, optional remote pressure regulation for overpressure protection

4. Core Advantages

4.1 Super-Large Displacement & Strong Overload Capacity

As the top displacement model of A4VSO22 series, it delivers sufficient power reserve and strong overload resistance for extreme heavy-load equipment.

4.2 Precise DR Constant Pressure Stabilization

Integrated DR valve group ensures precise pressure stabilization. It adjusts displacement automatically for energy saving, maintaining stable pressure without drop or vibration.

4.3 Reinforced High-Pressure Durability

Reinforced housing and upgraded core components feature low leakage, high temperature and impact resistance, ensuring long-term stable heavy-duty operation.

4.4 Linear & Stable Flow Regulation

Heavy-duty swashplate provides linear flow regulation with smooth output, reducing pipeline impact and protecting rear hydraulic components.

4.5 1:1 Zero-Modification Replacement

Fully compatible with standard 22-series installation parameters. Direct replacement without modification, saving renovation cost and time.

4.6 Harsh Environment Adaptability

Upgraded heavy-duty bearings resist compound impact loads, adapting to dust, high-low temperature and salt spray harsh working conditions.

4.7 Powerful Series Expansion Performance

100% through-shaft design supports series connection with multiple pumps, enabling flexible expansion for high-power multi-circuit hydraulic systems.

4.8 Factory Direct Supply & Full Service

Factory direct supply with competitive pricing and ample spot stock. Full professional support covers model selection, installation and after-sales service.

5. Full Series Standard Models (LD Upgrade Version)

LD-A4VSO250 is an upgraded version with higher precision, better pressure stability and longer durability than standard pumps.LD-A4VSO250DR/22R-PPB13N00-LD, LD-A4VSO250DR/22L-PPB13N00-LD, LD-A4VSO250DRG/22R-PPB13N00-LD, LD-A4VSO250LR2N/22R-PPB13N00-LD, LD-A4VSO250EO2/22R-PPB13N00-LD, LD-A4VSO250DFR1/22R-PPB13N00-LD, LD-A4VSO250HS4/22R-PPB13N00-LD, LD-A4VSO250LRC/22R-PPB13N00-LD

6. Application Fields

Suitable for metallurgical, shield tunneling, mining, port, marine and super-large construction machinery. Ideal for imported pump replacement and domestic hydraulic system upgrading.