Mechanical seal is a pair of or several perpendicular to the axis of the relative sliding of the end face of the fluid pressure and the compensating mechanism of the elastic force (or magnetic force) to keep fit and with the auxiliary seal to seal leakage seal device.
Common mechanical seal structure consists of static ring (static ring), rotating ring (moving ring), elastic spring seat, set screw, rotating ring auxiliary ring and stationary ring auxiliary ring and other components, anti-rotation pin fixed to the gland To prevent the stationary ring from rotating.
Rotary and stationary rings can often also be referred to as compensating or non-compensating rings depending on whether they have axial compensation capabilities.