O-rings is a circular sealing element with a cross-section shape, which is widely used in a variety of mechanical equipment and plays a sealing role in a certain temperature, pressure and different liquid or gas media.

In addition, the seal has a variety of structures, so what are the superior performance of the O-ring compared with the sealing ring of other structures? Why are O-rings the preferred structure in some environments?

Here I introduce the advantages of O-rings:

1. the sealing part of the O-ring is simple in structure, compact in installation, and light in weight.

2. the O-ring has a self-sealing effect, often only one seal can complete the sealing effect.

3. the O-ring sealing performance is good, almost no leakage when used as a fixed seal, when used as a motion seal, only some leakage when the speed is higher.

4. the O-ring movement friction resistance is very small, for the occasion of alternating pressure can also be adapted.

5. the size and groove of the O-ring have been standardized, low cost, easy to obtain products, easy to use and outsourcing.

Compared with the sealing rings of other structures, there are also the following three problems:

1. The friction resistance of O-ring when starting is large.

2. When the O-ring is used as the seal of the pneumatic device, it must be lubricated to prevent wear.

3. The O-ring has strict requirements on the processing size and accuracy of coupling accessories, such as moving surfaces, grooves, gaps, etc.