The use of O-rings, the selection of materials and installation methods

O-ring is a common sealing element, widely used in various industrial fields. Proper use and installation can ensure a good sealing effect. This article will describe its application range, material selection and installation methods to ensure good sealing performance.

Scope of application

Seal rings are suitable for a variety of applications including, but not limited to, the following industries:

1. hydraulic and pneumatic system: mainly used in oil, gas, liquid medium sealing places, such as hydraulic cylinder, gate valve and pipeline connection.

2. automotive industry: used to seal engine, transmission, braking system and other components.

3. electronic products: used to seal the shell of electrical and electronic equipment to prevent dust and moisture from entering.

The use of O-rings, the selection of materials and installation methods

Choose the right materials

The sealing ring material should be selected according to the actual application environment and medium. Common sealing ring materials include nitrile butadiene rubber (NBR), fluorine rubber (FKM) and silicone rubber (VMQ).

Here are some common material selection points:

1. nitrile butadiene rubber (NBR) : suitable for the general industrial field, the general oil medium has good oil resistance.

2. fluorine glue (FKM) : suitable for high temperature and chemical corrosion environment, with excellent oil resistance and high temperature resistance.

3. silicone rubber (VMQ) : suitable for high temperature, with excellent high temperature resistance and electrical insulation properties.

Correct installation method

The correct installation method is the key to ensure the sealing performance of the sealing ring. Here are some key installation points:

1. preparatory work: before use, ensure that the pipe groove and sealing ring surface clean, no dust and no impurities.

2. the application of lubricants: before use, apply an appropriate amount of lubricant on the surface of the sealing ring to reduce friction and prevent damage.

3. pay attention to the direction: ensure that the sealing ring is placed correctly, so that the ring section is closely fitted with the inner wall of the pipe trench to prevent distortion or damage.

4. compression and installation: gently put the sealing ring into the pipe groove, gently compress both sides of the pipe groove with appropriate tools or installation equipment, so that it is evenly compressed, and close contact with the pipe wall.

5. prevent damage: During the installation process, avoid using sharp tools or over-stretching and twisting the sealing ring, so as not to damage the sealing performance.

6. check the installation: after the installation is completed, check whether the installation is correct to ensure that the pipe groove is uniform, smooth, and no damage or deformation.

Precautions and maintenance measures

In order to ensure the best performance of the seal ring, in addition to the correct installation, the following are some considerations and maintenance countermeasures:

1. regular inspection: regularly check the wear, aging or damage of the sealing ring. If there is a problem, replace it regularly.

2. avoid excessive compression: avoid excessive compression of the seal ring, so as not to affect its toughness and sealing performance.

3. temperature and media restrictions: pay attention to the application of the seal ring temperature range and media restrictions, to avoid use in the environment beyond its capacity.

4. prevent compounds: prevent the sealing ring from being exposed to compounds incompatible with its material, so as not to cause expansion, corrosion or damage.

Understand the scope of use of O-rings, choose the appropriate material, master the correct installation method, and regularly check and maintain to ensure that it has a good sealing effect.

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