Types of Hydraulic Oil

There are many different types of hydraulic oil that can be used across a range of different applications, and it’s vitally important that you choose the right one for your system…

Hydraulics allow energy to be transferred through oil in a hydraulic system. There are many different types of hydraulic oil for a wide range of applications and it is important to choose the right oil for your system. This may also include a bespoke mixture made for specific requirements.

Most hydraulic oils are made up of mineral oils, synthetic and fire-resistant fluids, which are used in all types of applications.

Types of hydraulic oilThere are three main areas that hydraulic oil can be found in: mobile, stationary / industrial and aviation. Each one of these requires different types of hydraulic oil depending on the conditions they are operating in and the demands placed on the equipment.

Hydraulic oil for low temperatures: There are many different hydraulic oils for applications that are utilised in harsh, cold environments. If this is the case, you will usually find that anti-freeze additives, are added to the oil to ensure it doesn’t freeze.

Heat-resistant hydraulic oil: If the temperature of hydraulic oil is increased it has a lower viscosity, meaning the oil will flow easier. This increases the risk of leaking of the loss of the oil’s properties. Additives are added to the oil in order to maintain a viscosity suitable for the system, when it is exposed to high temperatures.

Hydraulic oil for high pressures: If hydraulic oil is placed under a large amount of stress in high pressure conditions, it still needs to be able to function and enable a hydraulic system to run smoothly. This is where heavy-duty oil in necessary, usually containing additives that prevent wear. These types of hydraulic oil can be found in a wide range of applications including those used in the construction industry.

Environmentally-friendly hydraulic oil: Some applications may pose a potential risk of oil spills or leaks. This could lead to contamination within the environment, so most environmentally-friendly oils are biodegradable and comprise of rapeseed and some other vegetables oils.

Other features of hydraulic oil to consider when looking into the different types of hydraulic oil include:

  • thermal steadiness;
  • durability;
  • hydrolytic balance;
  • continuous viscosity;
  • decreased chemical corrosives;
  • high anti-wear characteristics;
  • total water rejection;
  • decreased likelihood of cavitating;
  • cost-effectiveness.

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