What are the precautions for using API682 mechanical seals?

What are the precautions for using API682 mechanical seals?

API682 mechanical seal is a widely used mechanical seal in industries such as centrifugal pumps, mixing mixers, centrifugal compressors, etc. It has the advantages of good sealing, high reliability, and long service life, and is widely favored by users. However, there are still some precautions to be taken when using API682 mechanical seals to ensure the reliability and service life of the seal. Below, we will provide a detailed introduction to the precautions to be taken when using API682 mechanical seals.

1、 The installation of a mechanical seal for a sealed interface is composed of a fixed ring and a movable ring, and a certain small gap needs to be filled between the two sealing surfaces, that is, the small gap between the sealing rings. The small gaps between the sealing rings need to be properly filled to achieve the appropriate pressure. During installation, it should be ensured that the sealing ring is placed correctly and does not bend or deform; Before installation, the sealing surface should be cleaned to remove foreign objects such as surface crystals or rust, otherwise it will affect the gap between the sealing rings and reduce the sealing effect.

2、 The operation of the API682 mechanical seal at the sealing interface generates friction and heat during normal operation, which can cause small gaps on the surface of the sealing interface to change. Therefore, during use, it is necessary to ensure that the position and clamping force of the sealing interface remain unchanged, which can avoid small gap changes and increased frictional heat. It should be noted that when the liquid temperature is above 40 ℃, forced circulation lubrication should be carried out and the lubricating oil pressure should be kept stable to avoid excessive wear and heat increase at the sealing interface.

3、 Temperature control requires attention to the temperature range that the sealing ring can withstand when using API682 mechanical seals. If the load range of the sealing ring is exceeded, the sealing ring will deform, fall off, or burn out, resulting in leakage. Therefore, the liquid temperature should be controlled during use to ensure that the sealing ring does not burn out or deform. In practical applications, an external circulating cooling system is generally used to reduce the temperature of the sealing ring.

4、 The choice of material for mechanical seals directly affects their sealing performance, wear resistance, and service life. When using, the appropriate material should be selected according to the medium to be sealed by the sealing ring. For working conditions such as high temperature, high pressure, and high-speed rotation, it is necessary to use sealing materials with strong wear resistance and good crack resistance. At the same time, the compatibility between the sealing ring and the working medium should also be considered, and the use of sealing materials that are incompatible with the medium should be avoided.

5、 There are some corrosive chemicals in the medium sealed by the cleaning and maintenance sealing ring, which may corrode the surface of the sealing ring and reduce its sealing performance. Therefore, before long-term use and replacement of the sealing ring, it is necessary to clean the sealing ring and sealing surface to remove corrosive substances attached to the surface. When maintaining the seal, it is also necessary to pay attention to whether the clamping force after reinstallation is appropriate and whether there is any error. Regularly check the wear of the seal and make timely adjustments.

The service life of API682 mechanical seals is closely related to their actual usage, and the above points can effectively extend their service life and improve their reliability. Therefore, when using API682 mechanical seals, we need to operate carefully, keep the sealing interface clean and stable, pay attention to material selection and regular maintenance. These measures can ensure the stable operation of API682 mechanical seals.