How to Select the Right Hydraulic Oil for Hydraulic System

As a manufacturer and supplier of hydraulic cylinders，AiSoar knows that the lifeblood of any hydraulic system is its hydraulic oil. This crucial component not only lubricates but also transfers power, protects against wear, and even aids in cooling the system. 

Understanding Hydraulic Fluids

Hydraulic fluids serve as the lifeblood of hydraulic systems. They transmit power, lubricate moving parts, reduce wear, and help dissipate heat. There are several types of hydraulic fluids, including:

Mineral Oil-Based Fluids

 These are the most common and are derived from refined crude oil. They offer good lubrication and are generally cost-effective.

• Synthetic Fluids: Made from chemically engineered compounds, these fluids provide superior performance in extreme temperatures and demanding applications.
   
• Water-Based Fluids: These include water-glycol solutions and are used in fire-resistant applications. They offer excellent safety but may have lower lubrication properties.
   
• Biodegradable Fluids: These are environmentally friendly options made from vegetable oils or synthetic esters, suitable for applications where environmental impact is a concern.
   

Key Factors in Choosing the Right Hydraulic Fluid

Viscosity: The viscosity of a hydraulic fluid affects its flow characteristics and lubrication properties. It must be compatible with the operating temperature range of the hydraulic system. Too high viscosity can lead to sluggish operation and energy losses, while too low viscosity can cause inadequate lubrication and increased wear.

Additives: Hydraulic fluids often contain additives to enhance their performance. These can include anti-wear agents, rust inhibitors, anti-foaming agents, and antioxidants. Understanding the role of these additives and choosing a fluid with the right combination can significantly improve system performance and longevity.

Compatibility: The hydraulic fluid must be compatible with the system’s components, including seals, hoses, and pumps. Incompatibility can lead to seal swelling, hardening, or cracking, causing leaks and system failure.

Temperature Range: The operating temperature range of the hydraulic system is crucial. Fluids must maintain their properties across this range. For example, synthetic fluids are better suited for extreme temperature applications due to their stable properties.

Environmental Considerations: For applications in environmentally sensitive areas, biodegradable fluids are preferable. They reduce the risk of environmental contamination in case of leaks or spills.

Fire Resistance: In applications with a high risk of fire, such as foundries or steel mills, fire-resistant fluids like water-glycol solutions or phosphate esters should be considered to enhance safety.

Practical Steps for Selecting Hydraulic Fluid

Consult the Manufacturer’s Recommendations: Always start with the hydraulic system manufacturer’s recommendations. These guidelines are based on extensive testing and provide a reliable starting point.

Analyze Operating Conditions: Consider the specific operating conditions of the hydraulic system, including load, speed, temperature, and environment. This analysis helps in selecting a fluid that matches the real-world conditions of the application.

Perform Fluid Testing: Periodic testing of hydraulic fluids can provide insights into their condition and performance. This can help in making informed decisions about fluid selection and replacement intervals.

Consider Maintenance Requirements: Some hydraulic fluids may require more frequent maintenance or monitoring. Choose a fluid that aligns with the maintenance capabilities and schedules of the system operators.

Conclusion

Selecting the right hydraulic fluid is a critical decision that impacts the performance, efficiency, and longevity of a hydraulic system. By considering factors such as viscosity, additives, compatibility, temperature range, environmental impact, and fire resistance, manufacturers can guide their customers towards making informed choices. Regular consultation with the system manufacturer’s recommendations and ongoing fluid testing further ensures that the hydraulic system operates at its best, providing reliable and efficient service.

As a manufacturer of hydraulic systems, offering comprehensive guidance on hydraulic fluid selection not only helps your customers achieve optimal performance but also strengthens your reputation as a trusted partner in their operational success.

AISOAR HYDRAULIC CYLINDERS

Hengxin Mansion, No. 588, Jiangnan Main Road, Changhe Street, Binjiang District, Hangzhou City, Zhejiang Province, China

TEL: +86-571-87920309   

Email: sales@ai-soar.com  

Website: www.aisoarhydraulics.com