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Choosing the right hydraulic fluid for your Danfoss pump is critical to ensuring optimal performance and longevity of the equipment. Hydraulic fluids play a vital role in the operation of hydraulic systems, influencing everything from lubrication to heat transfer. Here’s a guide on how to select the most suitable hydraulic fluid for your needs.
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Understanding the Requirements

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The first step in choosing the right hydraulic fluid is to understand the specific requirements of your Danfoss pump. Check the manufacturer’s specifications for recommended fluid types and any relevant performance criteria. Danfoss pumps may operate under different conditions, so ensuring that the fluid you select can handle those conditions is vital.
Consider Viscosity
Viscosity is one of the most important characteristics of hydraulic fluids. It affects the fluid’s ability to lubricate and transmit power. Refer to the Danfoss pump’s manual for the recommended viscosity grade and ensure that the fluid falls within this range. Consider the operating temperature of your system, as viscosity can change with temperature. Choose a fluid that maintains stable viscosity over the expected temperature range.
Select the Right Type of Fluid
Hydraulic fluids can be categorized into mineral, biodegradable, and water-based fluids. Mineral oils are commonly used and suitable for many applications. Biodegradable fluids are essential for environmentally sensitive applications, while water-based fluids can provide excellent cooling properties but may not offer the same lubrication as oil-based fluids. Assess the specific application of your Danfoss pump to determine which type of fluid is most suitable.
Check Additives
Hydraulic fluids often contain additives that enhance performance by preventing oxidation, improving lubrication, and providing rust protection. Verify that the additives present in the hydraulic fluid are compatible with your Danfoss pump. Look for fluids that meet industry standards and guidelines, as they are typically formulated to provide the necessary protection and performance.
Evaluate Stability and Compatibility