Shandong Keystone Hydraulic Co.,Ltd
Product Details
Place of Origin: China
Brand Name: KERSTERN
Certification: SIO9001
Model Number: HA4VSO Series
Payment & Shipping Terms
Minimum Order Quantity: 5
Price: Negotiable
Packaging Details: Wooden boxes and cartons
Delivery Time: 7 work days
Payment Terms: T/T
Supply Ability: 5,000 units per month
The HA4VSO series axial piston variable pump is a high-performance swash plate type hydraulic pump designed exclusively for construction machinery. With a continuous operating pressure of 350 bar and a maximum pressure of 400 bar, it delivers reliable hydraulic power for heavy-duty applications. The pump is available in multiple sizes ranging from 40 to 1000, providing flexible configuration options to meet the hydraulic needs of excavators, loaders, bulldozers, and other construction equipment.
The HA4VSO pump is engineered for use in construction machinery only, ensuring optimal hydraulic efficiency and durability in harsh environments. Typical applications include:
Excavators – providing precise hydraulic power for digging and lifting
Wheel Loaders – efficient energy transfer for bucket operation
Bulldozers – consistent hydraulic flow for blade control
Road Machinery – rollers, graders, and pavers with high hydraulic demand
High Pressure Performance: Continuous 350 bar operation, maximum 400 bar capacity
Variable Displacement: Swash plate adjustment allows infinitely variable displacement to match system requirements
Energy Efficiency: Output flow adjusts automatically, reducing energy loss during low load conditions
Low Noise Design: Optimized oil channels and spherical porting significantly lower operating noise
Modular Construction: Flexible configuration for various installation and control options
Long Service Life: Built with high-strength materials and precision manufacturing processes for durability in tough environments
| Size | 40 | 71 | 125 | 180 | 200 | 250/H | 355/H |
|---|---|---|---|---|---|---|---|
| Displacement (cm³/rev) | 40 | 71 | 125 | 180 | 200 | 250/250 | 355/355 |
| Max Speed (rpm) | 2600 | 2200 | 1800 | 1800 | 1800 | 1500/1900 | 1500/1700 |
| Continuous Pressure (bar) | 350 | 350 | 350 | 350 | 350 | 350 | 350 |
| Maximum Pressure (bar) | 400 | 400 | 400 | 400 | 400 | 400 | 400 |
| Max Flow (l/min) | 104 | 156 | 225 | 324 | 360 | 375/475 | 533/604 |
| Max Power (kW) | 61 | 91 | 131 | 189 | 210 | 219/277 | 311/352 |
| Weight (kg) | 39 | 53 | 88 | 102 | 102 | 184 | 207 |
Material Selection – high-strength cast iron and alloy steel
Precision CNC Machining – ensures dimensional accuracy
Heat Treatment – improves wear resistance and strength
Assembly & Testing – each pump is tested under pressure before delivery
Surface Protection – anti-corrosion coating for long-term durability
Fill pump casing with clean hydraulic oil before startup to prevent dry running
Maintain oil cleanliness at NAS 9 level or better
Ensure hydraulic oil type complies with ISO VG 46 or VG 68
Do not exceed maximum rated pressure or speed limits
Regularly inspect seals, filters, and connections to prevent leakage and contamination
Warranty: 12 months against manufacturing defects
Technical Support: Expert guidance for installation and operation
Spare Parts: Genuine replacement parts available for fast delivery
Repair Service: Professional after-sales team provides global support
Q1: Can the HA4VSO pump be used outside of construction machinery?
A1: No. This model is designed exclusively for construction machinery applications.
Q2: What type of hydraulic oil is recommended?
A2: Standard mineral-based hydraulic oils ISO VG 46 or VG 68 are recommended.
Q3: How is pump noise controlled?
A3: The optimized flow channel design and spherical valve plate significantly reduce operational noise.
