The design of the mechanical seal consists mainly of two parts: a movable and a fixed part. The fixed part is usually a ring that is fixed in the pump housing. The movable part is mounted on the shaft and is compressed by means of a spring to the stationary part.
Sealing with a mechanical seal is achieved with the help of secondary seals (bellows, rubber rings) and friction pairs. When choosing a mechanical seal, it is important to choose the material of secondary seals and friction pairs.