Pump mechanical seal is mainly composed of three parts, one is the base, it should be installed on the pump body, can be made of many materials, two is the sliding ring, generally round, rectangular section, combined with other seals and installed in On the pump shaft, it is generally made of a material with good wear-resistance and sealing properties such as carbon. The third is a pressing device that generates pressure, which may be a spring or other means.

After the sliding ring is mounted on the pump shaft, it rotates integrally with the pump shaft. The fitting part is in static contact and has good sealing property. The pressure of the pressing device presses the sliding ring tightly on the base, that is, the sliding ring is Rotation on the pedestal forms a dynamic seal because carbonaceous materials such as graphite and pencil shavings are small, dense, and tightly sealed, and have the added benefit of lubricity, so that a complete seal can be achieved during rotation. However, it should be noted that when machining, the machining accuracy is higher, and the installation angle should be paid attention to. In addition, remember that when the mechanical seal is installed, do not touch the sliding contact surface by hand. Even a handprint that is not visible may be Affect the final performance.