Hydraulic oil is a type of lubricating oil used in hydraulic systems to transmit power. So, It provides lubrication, seals, and cooling to the system. This is reducing friction, and wear and tear and protecting against corrosion.
It is typically made from mineral oil, synthetic oil, or water-glycol fluids. and it is chosen based on its viscosity, oxidation stability, and anti-wear properties.
The oil must meet the specific requirements of the hydraulic system. Because, it will be used in, and must be compatible with the materials used in the system.
There are several types of hydraulic oils, including:
Mineral oils: Made from petroleum and are the most commonly used type of hydraulic oil. They are cost-effective and provide good overall performance.
Synthetic oils: Made from chemical compounds and offer improved performance compared to mineral oils, such as better oxidation stability, lower temperature viscosity, and improved wear protection.
Water-glycol fluids: A mixture of water and glycol, used in systems where fire resistance is a concern, such as in aerospace or military applications.
Biodegradable oils: Made from renewable resources and are designed to break down into harmless substances if they are released into the environment.
Fire-resistant fluids: Used in high-temperature and high-pressure systems, or in applications where there is a risk of fire, such as in aerospace and military applications.
The choice of oil depends on the specific requirements of the system, including operating temperature, pressure, and system materials.