What type of fluid is often used in fire-resistant hydraulic systems?

In fire-resistant hydraulic systems, water-containing fluids are commonly used due to their ability to effectively reduce the risk of combustion compared to other fluid types. These fluids can absorb and dissipate heat, helping to prevent the hydraulic system from reaching temperatures that could ignite surrounding materials. Water-containing fluids also generally have better cooling properties, making them suitable for environments where hydraulic equipment may be exposed to high temperatures or open flames.

Additionally, these fluids can be formulated with various additives to enhance their fire-resistant properties while maintaining good lubrication and hydraulic performance. While oil-based and glycol-based fluids also exist, they often present higher risks of fire in applications where flames or sparks are present. Air-based fluids are not practical for hydraulic systems, as they lack the necessary properties to transmit force effectively in hydraulic applications. Therefore, water-containing fluids emerge as the preferred choice for ensuring safety and reliability in fire-prone environments.