A4VSO axial piston variable pumps for hydrostatic drives in open circuit.

Featuring swashplate design, flow proportional to drive speed and displacement, low noise level, pre-compression volume for pressure pulsation reduction, long service life, modular design, and variable through drive options.

Mainly used in industrial open circuit hydraulic systems.

A4VSO 40 / A4VSO 71 / A4VSO 125 / A4VSO 180 / A4VSO 250 / A4VSO 355 / A4VSO 370 / A4VSO 500 / A4VSO 750 / A4VSO 1000 · Up to 400 bar

 

 
 

Your Professional Hydraulic Proportional Valve 4WRPEH Supplier

 

 

BOKIN is a high-tech company focused on R&D, manufacturing, and global trade of high-end hydraulic components and intelligent electro-hydraulic systems. We provide reliable hydraulic solutions and customized systems for industrial automation, construction machinery, precision manufacturing, and new energy applications.


Strong R&D Capability
Backed by advanced research from Zhejiang University and experienced engineers, we continuously develop stable and efficient hydraulic technologies.

 

Reliable Product Quality
We follow strict quality control standards to ensure consistent performance, durability, and safe operation in industrial environments.

 

Flexible Custom Solutions
We support OEM/ODM services including specifications, control systems, logos, and packaging to meet different project needs.

 

 

Specification

 

 

Available Size

A4VSO40

A4VSO71

A4VSO125

A4VSO180

A4VSO250

Series

1X

Nominal Pressure

350 / 380 bar

Maximum Pressure

400 / 420 bar

 

Advantages of A4VSO Pump
 

High Efficiency and Energy Saving
Designed for maximum volumetric efficiency, the A4VSO pump helps save a lot of energy that otherwise would have been spent to maintain that output. Studies reveal energy savings that can go up to 15% with variable load applications as opposed to fixed displacement pumps.

 

Wide Pressure Range
This pump is viable up to a pressure rating of 450 bar, so it is an ideal solution for highly demanding applications requiring this kind of hydraulic pressure with consistency and reliability. This high-pressure range also ensures the best performance for the manufacturing, construction, and mining industries.

 

Good Control of Flow and Speed
Since the flow and pressure controls are proportional, control is exact on the systems to increase the responsiveness and accuracy of the process. This is very useful in applications where small movements or fine positioning are necessary.

 

Durability and Longevity
Made from quality materials and a good engineering design, A4VSO pumps offer excellent resistance to wear. Resiliently built to withstand harsh environments, this attribute of the pump contributes to its longevity, as well as very low maintenance costs and downtime with time.

 

Modular Design and Versatility
Its modular design allows the A4VSO to interface with a variety of hydraulic systems. This versatility covers a wide range of configurations and applications, from machine tools and injection molding machines to the marine and energy sectors, thus ensuring industry adaptability.

 

 

Applications of A4VSO Pump

 

 

 

Steel mills & metallurgy
Rolling mills, continuous casting machines, and blast furnace hydraulic systems. The A4VSO's constant-pressure control reduces heat and energy loss under heavy cycling loads.

 
 

Hydraulic presses & forging
Ceramic presses, stamping lines, and forging machines. Variable flow on demand lowers system temperature and improves overall efficiency.

 
 

Marine & offshore
Ship anchor winches, deck machinery, and offshore hydraulic drives. Long service life and flexible mounting positions suit marine installation constraints.

 
 

Construction equipment
Excavators, road rollers, and concrete pump trucks operating under demanding field conditions with continuously variable load requirements.

 
 

General industrial machinery
Gantry planers, pullers, die-casting machines, and chemical processing equipment requiring reliable high-pressure hydraulic power.

 

 

 

A4VSO vs A10VSO

 

 

Feature

A4VSO

A10VSO

Pressure Rating

Higher

Slightly lower

Industrial Use

Heavy-duty

General purpose

Size Range

Larger options available

Compact to medium

Typical Use

High power systems

Standard hydraulic systems

 

 
Precautions for Using the A4VSO Pump
 
01/

Periodic Checking of Fluid
Check fluid levels and condition from time to time; a fluid that is contaminated or used up can drastically reduce pump performance and lead to accelerated wear, thereby probably giving way to system failure. Use the fluid as specified by the manufacturer to ensure compatibility and better system performance.

02/

Pressure Level Monitoring
Ensure that the system pressure being applied to the equipment remains within the specified range stipulated for operation in the technical manual. Over-pressure conditions tend to impose an extra load on pump components, and under-pressure conditions put the system at a disadvantage.

03/

Seals and Connections Inspection
Periodically check for the signs of wear, leakage, or damage on seals, O-rings, and their connections. Prompt replacement of the damaged seal will help prevent fluid leaks and maintain system integrity.

04/

Keep Filtration Systems Clean
Keep filters and filtration systems clean. Clogged filters almost always restrict fluid flow, which also allows a drop in pump efficiency and raises the level of operational strain. Undertake filter replacement or cleaning as per the agreed-upon schedule offered by the manufacturer.

05/

Maintain Temperature Limits
Excessive heat will lead to rapid wear of the component and degradation of the hydraulic fluid. Check temperatures regularly and confirm that the cooling systems, such as heat exchangers, are working efficiently.

06/

Visual Inspection
Look for visible defects on the pump housing and mounting locations or any of its linked assemblies. Good timely identification of physical damage greatly helps in avoiding cascading failures.

 

Rexroth Type Axial Piston Pump A4VSO40 Variable Displacement

 

Ordering Process

Inquiry - Quotation - Communication - Order confirming - Deposit payment - Production - Testing and debugging - Balance payment - Packing - Delivery - Customer receiving - After service.

 

 

Packaging and Shipping

 

 

Packaging

Standard export wooden cases or Customized packaging

Shipping

Shipping by sea, by air, by express are acceptable. According to your requirements.

 

 

Our Certificates

 

 

productcate-1-1

 

 

FAQ

 

 

Q: Do you have a showroom?

A: Yes, we have a professional showroom with a full range of hydraulic pumps, valves, motors, and system solutions for customers to inspect and test.

Q: Can you customize products for clients?

A: Yes, we can customize products according to your needs. We have a professional R&D department; our designers can create technical drawings, and our technicians can develop prototypes to meet your personalized requirements.

Q: Can I request to advance the shipment?

A: It depends on whether there is sufficient inventory in our warehouse and the production schedule. If your order is urgent, please inform us when placing the order, and we will try our best to prioritize production to advance the shipment.

Q: Are there any special requirements for OEM purchases?

A: Yes, besides the trademark registration certificate for logo printing, we also need you to provide detailed technical specifications, performance requirements, and quality standards for the customized products to ensure that the final products meet your expectations.

Q: What is the lead time for a prototype?

A: About 7-10 working days after you confirm the drawings we made for you.

Q: What main software are you using in your product drawing?

A: We use the most advanced industry hydraulic component designing and developing software, such as AutoCAD, SolidWorks, and ANSYS, to ensure the accuracy and feasibility of product drawings and technical solutions.

Bokin Electro-Hydraulic Technology (Foshan) Co., Ltd. is one of the most experienced a4vso manufacturers and suppliers in China, featured by quality products and good price. Please rest assured to buy bulk advanced a4vso in stock here from our factory. Contact us for pricelist and customized service.

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