What is the difference between antiwear hydraulic oil on 46# and 68#? How to choose?
June 21, 2022
Antiwear hydraulic oil (HM) is mainly used for hydraulic systems for heavy load, medium pressure, high -pressure blades, plunger pumps and gear pumps. Hydraulic systems for medium -voltage, high -voltage engineering machinery, introduction of equipment and vehicles, such as computer CNC machine tools, tunnel excavators, crawler cranes, coal mining machines and other hydraulic systems.
Today, let's take a look at the difference between the difference between the 46 antiwear hydraulic oil and the 68 antiwear hydraulic oil: 1. Kimenatic viscosity is different At 40 ° C in the laboratory, the movement viscosity of the two types of hydraulic oil is different. The viscosity of No. 46 anti -abrasion liquid pressure oil is 68 ± 5 anti -abrasion -resistant oil pressure oil. It is very popular that the viscosity of No. 46 anti -abrasion hydraulic oil is thinner than the viscosity of No. 68 anti -abrasion liquid pressure oil. If it is winter, it will use a sparse dot to facilitate circulation; high in summer is relatively large.
2. Different pour point In actual use, the difference between the pouring point of anti -abrasion hydraulic oil and No. 68 anti -wear liquid pressure oil is still very large. For example, in the central region, the temperature in winter is about 0 ° C for a long time. If you use the 68th in summer, Anti -wear hydraulic oil may be worse in winter, and severe hydraulic equipment cannot operate normally. 3. The air release value is different The air release value of the air -to -wear liquid pressure oil is not greater than 10min; the air release value of the air for anti -abrasion oil is not greater than 13min. In the standard experiment, the time required to rise to the oil surface is called the air release value of lubricating oil. The smaller the air release value, it means that the foam can rise quickly and the better the air release. How to choose 46# and 68# antiwear hydraulic oil? For how to choose this problem of anti -wear hydraulic oil on No. 46 and 68, it is actually more applicable to see which one is more applicable according to the conditions of your equipment. Hydraulic oil is divided into 22, 32, 46, 68 and other brands according to 40 ° C. 46 and 68 are only two different viscosity levels of anti -abrasion hydraulic oil. Compared with HM 46, HM 68's viscosity is greater. Which viscosity level is selected by customers, mainly depends on the working temperature of the system and the type of the pump. Customers must refer to the level requirements recommended by the device instructions. The appropriate viscosity is important. The hydraulic oil viscosity is too large, the energy loss of the hydraulic system is large, the system efficiency is low, and the oil pump is difficult to absorb oil; the viscosity is too small, the amount of leakage in the oil pump is large, the volume loss increases, and the system efficiency is also reduced.
