What shapes of seals are available?

What shapes of seals are available?
After the O-ring and O-ring are installed into the sealing groove, their section is generally compressed and deformed by 15% - 30%. The top seal means that under the action of medium pressure, it sinks to one side of the groove to close the gap to be sealed, so as to achieve the purpose of sealing.
Packing seal: fill the packing (packing) between the steel pipe and the shell, and press it tightly with gland and screw to block the leakage gap and achieve the purpose of sealing. The top seal, such as the raw material with sealed faucet installed at home, is made of polytetrafluoroethylene with the best sealing performance.
Oil seal: the top seal indicates that the oil seal is also called the lip seal ring of the rotating shaft. The oil seal is mainly composed of the seal body, the reinforcing skeleton and the self tightening coil spring. It is a kind of seal used in the rotating movement of the shaft. It mostly refers to the seal of lubricating oil. It is commonly used in the bearings of various machines, especially the rolling bearings. Its function is to isolate the oil chamber from the outside, Seal oil inside and dust outside.
Shaft seal seal: the top seal means that the shaft seal mostly refers to the steam seal at the end of the pump shaft, and the seal between the rotating pump shaft and the fixed pump shell to prevent the leakage of high-pressure liquid from the pump along the shaft or the infiltration of external air along the shaft. The commonly used shaft seals include packing seal, mechanical seal and power seal.