5 categories of hydraulic oil, do not step on the pit after reading
October 06, 2022
There are many types of industrial lubricating oils, various varieties, and different technical performances. Hydraulic oil is the largest variety of industrial lubricating oils. Let's take a look at the types of hydraulic oils.
In order to meet the requirements of various system lubrication, hydraulic oil must have certain properties, such as viscosity, viscosity index, relative density, anti-wear, low temperature, acid value, flash point, oxidation stability, demulsification, hydrolysis stability Properties, foaming properties, air release properties, shear stability, rust resistance and filtration properties are classified into the following varieties according to the application of hydraulic oil, and each variety has different viscosity grades. HL hydraulic oil is made of neutral Base Oil with high refining depth and anti-oxidation and anti-rust additives. It is used in general machine tool hydraulic equipment to reduce the wear of components, reduce temperature rise and prevent rust. HM hydraulic oil is made of neutral base oil with a high refining depth and a viscosity index greater than 95, adding antioxidants, rust inhibitors and anti-wear agents. Therefore, its anti-wear properties are relatively good and can be used in high-speed and high-pressure hydraulic systems. . HG hydraulic oil is made of HM hydraulic oil by adding anti-stick-slip additives (oily agent or Friction Reducer). , used for machine tools combined with hydraulic system and guide rail lubrication system, to minimize the vibration and intermittent sliding (stick-slip) of guide rail at low speed, but not suitable for high pressure hydraulic system. HV hydraulic oil is made of base oil with viscosity index greater than 130, added with anti-oxidation, anti-rust, anti-wear, Viscosity Index Improver and Pour Point Depressant. It can be used in cold areas and hydraulic equipment working in harsh environments. HS hydraulic oil is a synthetic hydraulic oil. The base oil is α-olefin synthetic oil with excellent low temperature performance, and various additives similar to HV hydraulic oil are added to make a low temperature hydraulic oil with a pour point not higher than -45 °C. It is suitable for Hydraulic equipment working in the wild and harsh environments in severe cold areas. The above are the types of hydraulic oils according to their uses. Each type of hydraulic oil has different viscosities, and hydraulic oils with different viscosities will also have small differences in use. Therefore, we should refer to many factors when choosing. .
