Influencing Factors Of Seals

Hydraulic seals play a vital role in the integration of hydro-pneumatic components. If the seals of a hydro-pneumatic component product fail to pass, then this hydro-pneumatic component product is not a good product. There are many factors that affect the seal. 

First of all, pressure is an important factor that affects the quality of the seal. The level of pressure and the length of the pressure cycle change have a great impact on the damage of the seal (such as extrusion). The higher the pressure, the greater the impact of other factors on the performance of the seal, such as temperature, speed, the material of the seal, the gap between the piston and the cylinder, and the gap between the piston and the cylinder head. 

Another one is temperature and friction. It is more difficult to describe the maximum and minimum use temperature of a seal material, because this is the result of a series of factors. The working temperature of the piston and the piston rod are different, and they should be selected differently. There is also the surface roughness of the seal product, surface characteristics, pressure, medium, temperature, seal material, seal type and movement speed, which are all factors that affect the seal. 

The last one is the surface treatment. Experience has shown that the characteristics of the surface of the cylinder piston and piston rod have a great influence on the life of the seal. Surface characteristics are usually defined by the value of surface roughness RA, which is the arithmetic average of the absolute value of the surface shape deviation from the center line. 

However, these values do not fully represent the influence of the surface conditions on the seal, because even under the same roughness, different surface shape characteristics can lead to different degrees of seal wear on the seal.