What is the recommended threshold of water in hydraulic fluid?

In hydraulic systems, the presence of water in hydraulic fluid should be minimized, as even small quantities can lead to significant problems such as corrosion, degradation of the fluid, and reduced lubrication properties. The recommended threshold of water in hydraulic fluid is typically in the range of 0.02% to 0.04%. This range is widely accepted within industry standards, as it helps to ensure the reliability and performance of hydraulic systems.

When water content in hydraulic fluid exceeds this threshold, the risks of emulsification, which can lead to poor performance and increased wear in hydraulic components, significantly increase. Additionally, water can lead to the formation of rust and other contaminants, which can compromise system integrity and extend downtime for maintenance and repair.

The specified range of 0.02% to 0.04% represents a balance between ensuring fluid integrity and maintaining operational efficiency, aligning with best practices to protect hydraulic systems from water-related damage while optimizing performance and reliability.