Seals Sealing Principle and Method

Mechanical Seals Sealing Principle

To understand sealing, you must first understand leakage.

There are three types of leaks:

Leakage between the sealing surface gaps

Leakage of the sealed fluid through the capillaries of the seal material

Diffusion: It refers to the transfer of substances through the gap or the capillary of the material under the action of the concentration difference.


Seals Sealing Method

The sealing methods are roughly as follows

Minimize the number of places where seals are set

Blocking and isolation

Elicit or inject

Increase leakage resistance

Add work elements in the channel

A variety of sealing method combinations


Gasket seals, packing seals, mechanical seals, non-contact seals, and fluid-injection plugging under pressure are common forms of sealing.

Among them, the packing seal should be the most common, and it also includes soft packing, hard packing and formed packing.

Formed packing seals include common O-rings, Y-rings, oil seals, and more.

Non-contacting seals include gap seals, labyrinth seals, floating seals, dynamic seals, magnetic fluid seals and hermetic seals.


Related Articles

Mechanical Seal Concept and Composition

Mechanical Seal Operation and Maintenance 

Mechanical Seal Installation and Disassembly Precautions

New Sealing Materials and Technologies



Leave a comment

Please note, comments must be approved before they are published