What should we consider when selecting O-ring seals?

Silicone sealing rings are also quite common in our daily lives, such as the fresh-keeping boxes, rice cookers, water dispensers, lunch boxes, insulated boxes, water bottles, ovens, magnetized cups, coffee pots and other daily necessities that we see. The shape of silicone seals used in different places may also vary. For example, the O-ring we are going to talk about today is commonly used in industry, such as mechanical equipment. And there are also considerations when selecting these silicone seals. For example, when selecting O-ring seals, we need to consider the following factors:

1. Properties of sealing medium: Different materials have different applicable media, which need to be selected according to actual needs. For example, if the medium that needs to be sealed is petroleum or solvent, then butyl rubber should be selected; If the medium that needs to be sealed is high temperature or chemically corrosive substances, then fluororubber should be selected.

2. Working environment: It is necessary to consider the working environment of the O-ring, such as temperature range, pressure range, and whether it is exposed to sunlight or ozone. These factors will all affect the material selection of O-ring seals.

3. Cost: The prices of O-rings made of different materials also vary, and it is necessary to choose products with high cost-effectiveness while meeting the requirements for use.

4. Installation method: Different installation methods require the use of different materials. For example, if installation is required by pressing, a material with lower hardness, such as nitrile rubber, needs to be selected; If installation is required, a material with higher hardness, such as polytetrafluoroethylene, can be chosen.

5. Service life: The service life of O-ring seals made of different materials also varies, and it is necessary to choose the appropriate material according to actual needs. For example, the service life of nitrile rubber is generally 5-10 years, while the service life of fluororubber is longer, usually around 10-20 years.

In short, when selecting O-ring seals, it is necessary to consider comprehensively according to actual needs, choose suitable materials and specifications to ensure sealing effect and service life.