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, LR2N load sensing 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. LR2N load sensing compound control, energy-saving & stable pressure, 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 operation with LR2N load sensing compound control.It features fully compatible 30-series mounting dimensions, enabling 1:1 non-destructive replacement of imported pumps. Factory direct supply delivers cost-effective hydraulic system upgrades.

2. Quality Certification & Testing

Certified with ISO9001 & SGS, all pumps comply with international industrial hydraulic standards for reliable quality.Every unit undergoes strict pressure, stability, leakage and endurance tests to ensure zero pressure drop and stable performance under continuous 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: 2200 rpm

• Net Weight: 118Kg

• 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

• LR2N Load Sensing Control: Real-time load adaptive flow, built-in constant pressure protection, optional remote pressure regulation, high energy efficiency

4. Core Advantages

4.1 Super-Large Displacement & Strong Overload Capacity

As the top displacement model of A4VSO30 series, it provides sufficient power reserve and strong overload capacity for extreme heavy-duty equipment.

4.2 Energy-Saving LR2N Load Sensing Control

LR2N load sensing system automatically adjusts flow according to actual load, reducing no-load power consumption. Built-in pressure protection ensures stable operation and avoids system overpressure.

4.3 Reinforced High-Pressure Durability

Reinforced housing and upgraded core components resist high pressure, high temperature and impact, with ultra-low internal leakage for long-term stable operation.

4.4 Linear & Stable Flow Regulation

Heavy-duty swashplate ensures linear and smooth flow output, reducing pipeline vibration and protecting rear hydraulic components.

4.5 1:1 Zero-Modification Replacement

Fully compliant with 30-series standard parameters. Direct on-site replacement without modification, saving time and renovation costs.

4.6 Harsh Environment Adaptability

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

4.7 Powerful Series Expansion Performance

100% through-shaft design supports multi-pump series connection, flexibly expanding high-power multi-circuit hydraulic systems.

4.8 Factory Direct Supply & Full Service

Factory direct supply with competitive pricing and sufficient spot stock. Full-process professional technical and after-sales support is provided.

5. Full Series Standard Models (LD Upgrade Version)

LD-A4VSO250 is an upgraded LD version with higher precision, better pressure stability and stronger durability than standard pumps.LD-A4VSO250LR2N/30R-PPB13N00-LD, LD-A4VSO250LR2N/30L-PPB13N00-LD, LD-A4VSO250DR/30R-PPB13N00-LD, LD-A4VSO250DFR1/30R-PPB13N00-LD, LD-A4VSO250EO2/30R-PPB13N00-LD, LD-A4VSO250DRG/30R-PPB13N00-LD, LD-A4VSO250HS4/30R-PPB13N00-LD, LD-A4VSO250LRC/30R-PPB13N00-LD

6. Application Fields

Widely used in metallurgy, shield tunneling, mining, port, marine and large construction machinery. Perfect for imported pump replacement and domestic hydraulic system upgrading.