The purpose of hydraulic oil in industries is to provide lubrication, cooling, and protection to the various components within the hydraulic systems used in industrial machinery and equipment. This includes pumps, valves, motors, and actuators, which are powered by pressurized fluid. Lubrication is essential to reduce friction and wear on the moving parts of the hydraulic system, which helps to increase its efficiency and prolong its lifespan. The oil also acts as a coolant, helping to dissipate heat generated by the system, which can prevent overheating and damage to the components.
Protection is also an important function of hydraulic oil. It helps to prevent the buildup of dirt, rust, and other contaminants that can cause damage and reduce the efficiency of the system. It also helps to protect the system from corrosion, oxidation and other forms of wear. Additionally, a good hydraulic oil should also have good thermal stability and a high viscosity index, which helps to ensure that the oil will maintain its properties over a wide range of temperatures. This is particularly important in industries where the machinery and equipment are used in extreme temperatures and conditions.