LD-A4VG90 90cc High Pressure Closed Circuit Variable Piston Pump | Heavy-Duty Hydraulic Pump HYDSUNRIDA

LD-A4VG90 90cc High Pressure Closed Circuit Variable Piston Pump | Heavy-Duty Hydraulic Pump HYDSUNRIDA

HYDSUNRIDA LD-A4VG90 90cc 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 machinery.SEO Meta Long: Premium LD-A4VG90 90cc 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 hydraulic systems.

1. Product Overview

LD-A4VG90 is a heavy-duty closed-circuit variable piston pump with 90cc displacement and 400bar rated pressure. It supports 24/7 full-load operation for heavy construction and mining hydraulic systems.With stable large flow, low leakage and high efficiency, LD-A4VG90 achieves 1:1 non-destructive replacement of standard A4VG90 pumps. No modification or debugging is required to cut maintenance costs.

2. Quality Certification & Testing

LD-A4VG90 holds ISO9001 and SGS certifications, complying with industrial hydraulic standards for stable and reliable quality.Each pump undergoes strict pressure, flow, leakage and endurance tests, ensuring ultra-low failure rates under continuous heavy loads.

3. Core Technical Parameters & Control Modes

3.1 Basic Specifications

• Rated Displacement: 90 ml/r (Large displacement for heavy-duty closed circuit systems)

• Nominal Pressure: 400 bar

• Peak Pressure: 450 bar

• Structure: Swashplate piston design, rigid housing, high strength, 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 Control: Adaptive speed regulation for stable operation

• EZ Proportional Control: Precise electro-mechanical adjustment

• HD Hydraulic Control: Sensitive hydraulic servo regulation for heavy loads

4. Core Advantages

4.1 1:1 Zero-Modification Replacement

Fully compatible with standard A4VG90 dimensions and parameters. Direct replacement for imported pumps reduces procurement and upgrade costs.

4.2 Factory Direct Supply

Factory direct supply with competitive pricing. Sufficient spot stock supports fast delivery and bulk orders.

4.3 Heavy-Load Durability

High-strength alloy core parts and precision grinding deliver outstanding pressure and wear resistance for long-term heavy-duty operation.

4.4 Low Heat & High Efficiency

Low internal leakage and optimized structure reduce heat generation, improving hydraulic system efficiency and stability.

4.5 Custom OEM/ODM Service

Professional OEM/ODM customization for special pressure and flow parameters to fit complex working conditions.

4.6 Full-Cycle After-Sales Service

Full service support including model selection, installation guidance and reliable after-sales technical service.

5. Full Series Standard Models (LD Upgrade Version)

LD-A4VG90 is an upgraded version with higher precision, better sealing and stronger durability than standard pumps.

5.1 DA Speed Sensing Control Series

LD-A4VG90DA1D3L/32R-NZCXX, LD-A4VG90DA2D3L/32R-NZCXX, LD-A4VG90DA1D2L/32R-NZCXX, LD-A4VG90DA2D2L/32R-NZCXX

5.2 EZ Proportional Control Series

LD-A4VG90EZ1D3L/32R-NZCXX, LD-A4VG90EZ2D3L/32R-NZCXX, LD-A4VG90EZ1D2L/32R-NZCXX, LD-A4VG90EZ2D2L/32R-NZCXX

5.3 HD Hydraulic Control Series

LD-A4VG90HD3D3L/32R-NZCXX, LD-A4VG90HD2D3L/32R-NZCXX, LD-A4VG90HD3D2L/32R-NZCXX

5.4 General Standard Series

LD-A4VG90 32R-NZCXX, LD-A4VG90 32N-NZCXX, LD-A4VG90-NZCXX

6. Application Fields

Suitable for construction machinery, mining equipment, concrete pump trucks, port machinery and hydraulic test benches. Ideal for imported pump replacement and domestic hydraulic system substitution.