How are mechanical seals used?

1.Internal structure of pump

A pump is a machine that works to move fluids, as in lifting a liquid to its inside. For example, its impeller rotates to move water.

2.Mechanical seal installation location in pump
A mechanical seal is installed on the impeller rotating shaft. This prevents the liquid from leaking through the clearance between the pump body and the shaft as a shaft seals.

3.Mechanical seal installation location on shaft

Mechanical seals are mostly comprised of two rings: a rotary ring on the shaft and a stationary ring on the pump housing.

4.Mechanical seal structure (stationary and rotary rings)

The rotary ring rotates with the shaft. The stationary and rotary rings rub against each other ensuring a clearance in the order of micrometers maintained between them. Where they rub against each other, they are referred to as "face materials."

The essential point is to control leakage and friction.