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Hydraulic Supply Services

ChangJia stands as a trusted expert in the realm of hydraulic supply services, specializing in the R&D, production, and sale of hydraulic components. Our expertise encompasses a wide range of essential elements, such as hydraulic orbital motors, hydraulic pumps, hydraulic valves, and others.

Streamlined Industrial Oversight for Premium Hydraulic Components

Operating within a fully industrialized and meticulously controlled environment, we oversee every aspect of the process. we ensure each hydraulic component meets the highest standards.

Factory-Trained Technicians & Rigorous Testing

Our production and testing facilities are staffed by factory-trained technicians, guaranteeing that all work adheres to OEM performance specifications and quality benchmarks. Our testing procedures are rigorous and unmatched in the industry, providing reliable and durable solutions

Brand We Serve

As a hydraulic component factory, we offer our clients confidence in wholesale replacement parts services. Here are some of the famous brands we can do for the replacement like Danfoss, M+S, Eaton, White, Char-Lynn, BOSCH Rexroth, etc.

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A comprehensive resource hub tailored for professionals and enthusiasts in the hydraulic industry.

Here, you'll discover in-depth materials on our cutting-edge hydraulic motors, valves, and pumps. Each product is engineered with precision, leveraging advanced technologies to ensure optimal performance, reliability, and efficiency. Whether you're seeking technical specifications, product catalogs, hydraulic solutions, or application guides, our curated content will equip you with the knowledge, help you make informed decisions.

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Strong R&D for Tailored Hydraulic Motors, Valves & Pumps

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About Changjia

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ChangJia is a global leader in hydraulic technology, integrating R&D, manufacturing, sales, and service to drive innovation and production of core hydraulic components. Specializing in high-end hydraulic solutions, the company offers a comprehensive product portfolio including hydraulic piston pumps, piston motors,orrbital motors, steering gears, gear pumps, and solenoid valves.

Deeply rooted in Bosch Rexroth's core technologies, Changjia integrates cutting-edge equipment and processes from Germany, Switzerland, Japan, the UK, and other countries to establish a benchmark for international smart manufacturing.

What Is The Function Of Directional Valve?

Directional valves are highly useful in hydraulic and pneumatic systems. They regulate the flow of fluid in the system and determine the direction that the fluid takes at any given time. Without these valves, machines would be unable to move the cylinders, turn the motors, or alternate between tasks.

2026 03 05

How to Troubleshoot Hydraulic Pump Pressure Drop?

The hydraulic pump ensures uniform flow to enable the system to accumulate sufficient pressure to work. The machine would not perform well in case the pressure reduces abruptly or gradually. There is a possibility that cylinders move at a slower rate, a motor loses its power, and the entire system becomes weak or shaky. Pressure drop is a typical hydraulic problem. However, it is not completely understood by many people.

2026 03 04

Hydraulic Pump vs. Hydraulic Motor: Key Differences

Many machines, such as industrial equipment, construction vehicles, and mobile tools, use hydraulic systems. The hydraulic motor and the hydraulic pump are two vital components of them. The two are often confused with each other, but they actually do very different work.

2026 03 03

Common Mistakes When Installing Proportional Valves

Installing a proportional valve may look straightforward, but small setup mistakes can quietly undermine system performance, safety, and lifespan. Since proportional valves control flow/pressure with accuracy, small errors in installation can result in unstable movement, energy loss, or failure.

2026 02 28

Advantages of Using Proportional Valves in Machines

Modern machines demand more than simple on-off control. From smoother motion to better energy efficiency, today's hydraulic and pneumatic systems rely on components that can respond precisely to changing conditions. This is where the proportional valve becomes essential.

2026 02 27

How to Calibrate a Proportional Valve Correctly?

Proportional valves are commonly chosen for those systems that require fine control. However, they only perform well when properly configured. Any slight variation between the control signal and the reaction of the valve may result in a shaky movement or sudden difficulties. Often, a valve problem happens due to a wrong calibration.

2026 02 26

What is Proportional Valve Used For?

Fluid powered machines do not always require plain movement with fixed speed. In the real world, loads vary, operators change the way things move, and the systems must react without any sharp jerks or jumps. This can be a problem with traditional valves that provide a limited amount of control.

2026 02 25

What Is the Difference Between a Directional and Proportional Valve?

Hydraulic and pneumatic systems utilize valves to regulate the movement and operation of machines. Two common types are directional valves and proportional valves. While both control fluid flow, they work in different ways and offer different levels of control. Choosing the right valve is important. It can cause poor performance, jerky movements, or make the system more complicated than it needs to be. This article explains how each valve works, what makes them different, where they are used, and how to choose the right one for your needs.

2026 02 24

System test report

ChangJia continues to introduce professional talents in the national hydraulic industry and now already has several senior engineers with an average working experience of more than 10 years. We can provide the following services

Customization

We have advanced digital production equipment, can customize production according to the product drawings, product parameters and other data provided by customers.

R&D

Research and Development: we have many experienced engineers, can design the plan and drawings, according to the product requirements provided by customers.

ChangJia is a global leader in hydraulic technology, integrating R&D, manufacturing, sales, and service to drive innovation and production of core hydraulic components.

Public Mailbox: info@changjia.com

Tina
Tel: +86 135 0836 3447
WhatsApp: +86 135 0836 3447
Email: tina@changjia.com

Anne
Tel: +86 158 2639 0716
WhatsApp: +86 158 2639 0716
Email: anne@changjia.com

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