The sealing ring under

Highlight ring: under, above, around
Sealing rings are indispensable details in a variety of mechanisms, from household appliances to complex industrial plants. Imagine two surfaces that should be separated, but at the same time not to miss liquid, gas or dust. Here, sealing rings come to the rescue. They are like an invisible wall that ensures the tightness and stability of the entire device.
How does the sealing ring work?
The work of the sealing ring is based on its shape and material. Usually, the ring has a special shape that allows you to tightly fit to the surfaces, creating a sealed connection. The material of the ring is selected taking into account operating conditions: for working in an aggressive environment, rings are needed from more resistant to corrosion of materials, and for low temperatures - from more flexible ones. In general, the better the ring adjacent, the more reliable the seal. It is like a tightly adjacent hood that protects against the cold, or a sealed bottle cover that does not allow the drink to pour out.
A variety of shapes and materials of sealing rings
There are a huge number of forms of sealing rings: round, oval, with hooks, and many others. The choice of a specific form depends on the design and features of a particular part to which they are attached. The materials of the rings are also very diverse: rubber, fluoroplast, metal, and special composites. Each material has its own characteristics that determine its application. For example, rubber works well with most oils and liquids, fluoroplast in chemically aggressive media, and metal at high temperatures. The choice of material is an important stage in designing, so that the sealing rings serve for a long time and reliably.
Why are sealing rings so important?
Sealing rings provide not only tightness, but also the durability of the entire device. Properly selected rings prevent leaks, increase the effectiveness of the mechanism and reduce the risks of breakdowns. Without them, many important systems simply would not function. So, for example, the car engine could not work without seals that prevent oil leaks and coolant. In the refrigerator, sealing rings do not allow products to deteriorate, and in pumps - do not pass the working fluid. This is a trifle, but it is very important!