The Roles and Characteristics of Hydraulic Fluid

The Roles and Characteristics of Hydraulic Fluid

It is easy to cut the significance of hydraulic fluid. No matter how acquainted you are with hydraulic equipment. There are surprising amounts of hydraulic fluid properties to consider your system efficiency.

In this post, we will look at the roles and features of hydraulic Fluid. Consider them when selecting fluids for your requirements from hydraulic seals and supplies.

The Roles of Hydraulic Fluid

Hydraulic fluid is an energy transfer medium powering pistons, vanes, and other pumps. Hydraulic fluid is non-compressible. This makes it suitable for applications that pneumatic systems could do. These functions may be influenced when alternative hydraulic fluid properties are chosen.

Heat Transfer

When a wiper seal for the hydraulic cylinder is working, it generates a lot of pressure within the pump. This pressure pushes hydraulic fluid into the gaps between system components. This is an essential element of how a hydraulic system operates.  But the friction of the fluid molecules rubbing against the equipment generates higher heat.

Removing Contamination

 The reality is that no seal is perfect. This means small amounts of water may be injected into your hydraulic fluid on occasion. Dirt or metal particles may also be found as a consequence of wear over time.


O-rings and other seals do the majority of the work in sealing your hydraulic system. However, hydraulic fluid contributes to the final seal. This is done by filling the minute gaps between these seals and other metal components. This keeps extraneous elements from entering your system while maintaining consistent pressure.


One of the essential functions of hydraulic fluid is to keep your equipment lubricated. Without lubrication, the metal components of your equipment would wear out fast. The consequence thus is generating less effective power.

Hydraulic Fluid Characteristics

It is important to consider the hydraulic fluid given these properties. Each of these qualities may have a variety of meanings. However, choose the right fluid with the specifications for your equipment from hydraulic seal suppliers.


The greater the viscosity, the thicker or more flow-resistant the fluid. The viscosity of fluids varies with temperature, with warmer fluids being less dense.


Your fluid should create a thin coating on everything inside your hydraulic pump. Even the tiny gaps between close-fitting components if it has the proper viscosity. Your oil’s surface tension needs to withstand the continuous contact between the moving parts. This gives it a tiny cushion of lubrication.

Corrosion Resistance

Most hydraulic fluids include chemicals reducing the amount of corrosion in your system. These additives prevent ferrous metals from rusting when they touch the water. This infiltrates every hydraulic system.


It is, thus, more essential than ever to dispose of wasted hydraulic fluid. When selecting hydraulic and pneumatic seals, consider how you dispose of them. You need to adhere to state and municipal regulations. In addition, you should consider all elements of your system. Starting with operating temperature to ambient temperature and pump type. This will assist you in selecting the appropriate hydraulic fluid properties for your system.

The above-discussed roles and features are essential when looking for hydraulic fluid. Study them and work with hydraulic seals and supplies. They will help you in finding the right fluid based on your needs.