Nitrile rubber is a universal sealing material. It is a rubber synthesized from acrylonitrile and butadiene. It has good resistance to the following media.
Most mineral oil and mineral oil grease
General fuels, such as gasoline, diesel and domestic fuel, animal oil, vegetable oil and fat
The nitrile rubber seal also allows the bearing to run for a short time without oil. The allowable operating temperature range is -40 to 100°C. It can withstand temperatures as high as 120℃ in a short time, so it is not suitable to work at higher temperatures.
Hydrogenated Nitrile Rubber
Hydrogenated nitrile rubber is more resistant to high temperatures than nitrile rubber, so seals made of this material have a long working life. In addition, hydrogenated nitrile rubber has strong resistance to heat, aging and hardening in hot oil or ozone. The maximum allowable working temperature of hydrogenated nitrile rubber is 150℃, which is much higher than that of nitrile rubber.
The main characteristics of fluorine rubber are high temperature resistance and chemical resistance, and it has good anti-aging and ozone resistance. Even under very harsh working conditions, fluorine rubber still has excellent wear resistance. The seal made of this material allows the bearing to run for a short time without oil.
Fluorine rubber also has excellent resistance to various media including hydraulic oil, fuel oil, lubricants, inorganic acids, aliphatic hydrocarbons and aromatic hydrocarbons.
The role and characteristics of the seal
The seal is of great significance to the cleaning of the lubricant and the service life of the bearing.
The function of the seal is to prevent the loss of lubricant and prevent contaminants from entering the space that needs to be protected.
The seal has the following characteristics:
Has sufficient deformability to compensate for irregular surfaces
Have enough strength to withstand the pressure of work
Able to withstand a relatively large operating temperature range
