HA4VSO Axial Piston Variable Displacement Pump for Industrial Applications

The HA4VSO series axial piston pump is a high-performance swash plate-type variable displacement hydraulic pump engineered specifically for industrial applications. With a continuous operating pressure up to 350 bar and a maximum pressure of 400 bar, it ensures reliable hydraulic power for demanding environments such as steel and metallurgy equipment and hydraulic power units. Designed with modular construction, it offers flexibility, energy efficiency, and long service life, making it the ideal choice for heavy-duty industrial systems.

Applications

• Steel & Metallurgy Equipment: Provides stable hydraulic power for rolling mills, smelting lines, and heavy forming presses.

• Hydraulic Power Units (HPUs): Ensures efficient energy transfer in centralized hydraulic systems for industrial plants.

Advantages

• High Pressure Capability: Continuous 350 bar and peak 400 bar performance for demanding industrial systems.

• Variable Displacement: Adjustable flow output to match system requirements, reducing energy consumption.

• Durability & Reliability: Built from high-strength materials for long service life under continuous heavy load.

• Low Noise Operation: Optimized fluid channels and porting reduce noise, improving workplace environment.

• Modular Design: Flexible configuration for different industrial system requirements.

• Energy Efficiency: Intelligent pressure compensation ensures minimal energy loss during low load conditions.

Technical Specifications

Manufacturing Process

1. Material Selection – Premium alloy steel and cast iron for durability.

2. CNC Precision Machining – Guarantees dimensional accuracy and smooth piston operation.

3. Heat Treatment – Enhances wear resistance for extended life.

4. Assembly & Testing – Each pump undergoes hydraulic performance testing at rated pressure.

5. Surface Protection – Anti-corrosion treatment ensures reliability in industrial environments.

Usage Instructions

• Fill the pump casing with clean hydraulic oil before startup.

• Maintain oil cleanliness at NAS class 9 or better.

• Avoid running the pump above rated pressure and speed.

• Regularly inspect filters and replace hydraulic oil to ensure long-term performance.

• Ensure proper system venting before operation to prevent cavitation.

After-Sales Service

• Warranty: 12 months against manufacturing defects.

• Technical Support: Guidance for installation, commissioning, and troubleshooting.

• Spare Parts Supply: Original replacement parts to minimize downtime.

• Repair & Maintenance: Professional service team available worldwide.

FAQ

Q1: Is the HA4VSO pump suitable for mobile machinery?
A1: No. This model is specifically designed for industrial applications only, such as steel and metallurgy equipment.

Q2: What hydraulic fluids are recommended?
A2: Standard mineral hydraulic oils (ISO VG 46 or VG 68). HF fluids are possible with reduced operating data.

Q3: How often should maintenance be performed?
A3: Oil and filter checks should be performed regularly, with complete oil replacement according to system usage conditions.

  Shandong Keystone Hydraulic Co., Ltd. is located in Tai bai hu new district, Jining city, Shandong Province, the hometown of Confucius and Mencius. It is only 40 minutes away from Jining Daxing Airport and Beijing-Shanghai High-speed Railway Station, and only 10 minutes away from the entrance of Jiwei high-speed way. The transportation is very convenient.

  Keystone Hydraulic is a professional factory engaged in the R&D and manufacturing of hydraulic products. We have modern standard workshops and high-precision imported processing facility, as well as advanced  hydraulic component manufacturing processes and technologies, a complete quality guarantee system, and With a team of experienced professional and technical personnel in the hydraulic industry, it is a professional factory established in accordance with advanced standards to develop and produce high-quality hydraulic motors.

  Keystone Hydraulic mainly produces KM1, KM4, KM5, KM6, KMT, KMV, KMER, KSD rotary, KTMT and other series of hydraulic motors with wheel, brake and various hydraulic valves, which are widely used in Construction machinery, Agricultural machinery, Plastic machinery, Marine Machinery, Mining machinery and other different applications. It mainly provides supporting and after-sales market services for domestic OEM , and exports to Europe, America, South America, Southeast Asia and other countries in the worldwide.