First of all, pressure is an important factor affecting the quality of the seal, the level of pressure, the length of the pressure cycle change, seal damage (such as extrusion) has a great impact.The higher the pressure, the greater the influence of other factors on the performance of the seal, such as temperature, speed, the material of the seal, the clearance between the piston and cylinder, and the clearance between the piston and cylinder head.
Another is temperature and friction. It is difficult to describe the maximum and minimum operating temperatures of a sealing material because they are the result of a series of factors.For the piston and piston rod working temperature are different, to make a distinction between them.There is another sealing product surface roughness, surface characteristics, pressure, media, temperature, sealing material, sealing type and speed of movement are all factors that affect the sealing
The last one is the surface treatment. Experience has shown that the surface characteristics of cylinder piston and piston rod have a great impact on the life of seals.Surface characteristics are usually defined by the value of surface roughness RA, which is the arithmetic mean value of surface shape deviation from the absolute value of the centerline.However, these figures do not fully represent the impact of surface conditions on seals, because even at the same roughness, different surface shape characteristics can lead to different degrees of seal wear.