Add reinforcing agent (such as graphite, calcium carbonate powder, etc.), filler (including silica gel, etc.), vulcanizing agent, vulcanizing accelerator and protective agent to rubber raw materials suitable for working conditions. Then it is put into a rubber kneader, mixed, put into a mold with the desired shape, heated, pressurized and vulcanized. Due to different types of main materials (rubber materials) and auxiliary materials, different mixing methods and vulcanization conditions, the oil resistance and aging resistance of products are also different. Therefore, after vulcanization, O-rings with the same appearance/size and shape can be obtained. However, if you do not pay attention to the selection and proportion of raw materials and processing methods, you will not obtain the expected properties (such as hardness, elasticity and strength).  

In general, the physical properties of rubber materials and their related test values can not only indicate the strength and elasticity of this material, but also are important indicators of manufacturing quality. Hardness and breaking strength are important data indicating the resistance to applied pressure, but the greater the breaking strength, the greater the resistance to applied pressure. The deformation refers to the amount of deformation produced when the O-ring is used and a certain degree of compression force is applied. The higher the value, the more likely the average value is to cause leakage. Especially as a fixed sealing stage, it is more desirable for compressed water to have small deformation for a long time. However, if the compressed water deforms too long, it will reduce the hardness and strength, which is not ideal. Therefore, the physical properties of O-ring materials must be fully considered, and they must be matched correctly.

use Rubber seals The pressure of the working environment needs to be considered. This is important to grasp seal ring The service life of will be very helpful. So, what are the characteristics of the product in terms of withstanding the pressure of the working environment?

one Rubber sealing ring The working pressure range of, that is, the compression ratio of the rubber ring under pressure.

2. Objects in contact with work, including liquid, gas, solid and chemical substances.

3. The function of rubber ring assembly is static seal (end face or radial), or dynamic seal (radial or axial).

4. Operating temperature range, low and high temperature of rubber ring during operation, as well as long time and instantaneous time.