how do lip seals work

What Do They Do? Rotary shaft seals work by keeping contaminants out with a thin sealing layer in between the lip and the shaft itself. These seals protect several critical functions of your machinery. First, lip seals retain lubricants in industrial applications.

The main functions of a lip seal (also known as a radial or rotary seal, which we'll come to shortly) are to retain lubricants, remove 

Sometimes on axles, shafts, &c., the seal wears a groove into the shaft or axle and a simple seal replacement will still leak. There are repairs available that involve bonding a sleeve to the shaft and using an oversize seal and others that relocate the lip of the seal to an undamaged surface of the shaft.

The dynamic sealing is achieved by a narrow edge, or lip, of elastomer or plastic in contact with a rotating shaft. The lip is supported by a flexible element 

There is a continuous lubricant film between the shaft and the seal. · A successfully running lip seal does not present any leakage. · A certain roughness is 

The chemically resistant P.T.F.E. component is spring loaded, to force the flexible angular lip of the wedge, into tight contact with the shaft. The same spring force impacts a sufficient load to the rotary face to create a suitable seal interface, with a varied choice of standard stationary seats. Examples of PTFE Wedge Mechanical Seals

How lip seals work. Lip seals work with a small contact area on the liner, which in turn is placed around the shaft. The seal works due to a hydrodynamic lubricating film between the lip seal and its counter surface, this area is called the sealing gap and the film thickness in general is a few microns.

Rotary lip seals maintain a thin layer of lubricant between the “lip” and the shaft. The hydrodynamic action created by the turning shaft causes a pump action 

What are Oil Seals and how do they work? The basic principle of sealing is straightforward – the flexible lip is held against the rotating part (usually the 

Rotary shaft seals work by squeezing and maintaining lubricant in a slim layer between the lip and the shaft. Sealing is aided by the hydrodynamic action caused by the rotating shaft, which creates a slight pump action. Rotary shaft seals provide protection through two crucial functions.

Omniseal Solutions™ lip seals are put to work in some of the most challenging applications in crankshafts, distributors, fuel pumps and cam