What to pay attention to when buying seals

The friction between seals and sealing surfaces depends on many factors. How to choose seals: among them, the factors include surface roughness, surface characteristics, pressure, medium, temperature, material of seals, structure of seals type and speed of movement.

1. Pressure:

The level of pressure and the length of the pressure cycle have a great influence on the damage of seals (such as extrusion). The higher the pressure, the greater the impact of other factors on the performance of the seal, such as temperature, speed, material of the seal, the gap between the piston and the cylinder, and the gap between the piston and the cylinder head.

2. Temperature:

It is difficult to simply describe the material of a seal, because it is the result of the combined influence of a series of factors. For the working temperature of the piston and the piston rod are different, they should be selected differently.

Three, friction:

The friction between seals and sealing surfaces depends on many factors: surface roughness, surface characteristics, pressure, medium, temperature, seal material and other factors.

Fourth, surface treatment:

Experience has shown that the characteristics of the cylinder piston and piston rod surfaces have a very large impact on the life of the seal. Surface properties are often defined by the value of the surface roughness RA, which is the arithmetic mean of the deviation of the surface shape from the centerline. However, these values u200bu200bdo not fully represent the effect of surface conditions on seals, because even under the same roughness, different surface shape characteristics can lead to different degrees of seal wear on seals. Knowing the above points, you can buy your favorite seal products with confidence.