What are the advantages of ED ring and o-ring?

What are the advantages of ED ring and o-ring

The ED ring is an elastic seal used as an axial static seal. For threaded oil outlets and threaded ends. Under high pressure, the cross section is almost constant. Compared with ordinary O-rings, it has the following advantages:
The mechanical deformation of this section is small, there is no relative movement during the pressure cycle, the sealing performance is excellent, and the working pressure can reach 60MPa.

ED circle advantages:
High temperature, oil, chemical resistance, ozone resistance, weather resistance, aging resistance, chemical solvent resistance, slag and flammability, excellent air tightness, chemically known resistance. Suitable for weak acid and weak base.

Disadvantages of ED circle:
Ketone-resistant, grease-resistant, and nitric acid resistant; fluororubber oil-resistant imported ED ring spot is Otsu, Japan, and DuPont needs to customize it. For the fine requirements of the running-in line, the price will be 30% higher; our company only makes high-end imports, the content of F-type fluorine rubber is 67%-69%; ED ring temperature: limit -40~240 commonly used -20~220 ED ring hardness: Range A50~90 commonly used 75 degrees; ED ring color: brown, black, sub-green (same performance).