O-rings are suitable for use in petroleum-based hydraulic oil, glycol-based hydraulic oil, diester-based lubricants, gasoline, water, silicone grease, silicone oil and other media. Nitrile rubber is currently the most widely used and lowest cost rubber seal. Not suitable for polar solvents such as ketones, ozone, nitro hydrocarbons, MEK and chloroform. Generally, the application temperature scale is -40 ~ 120 ℃. Different according to the data, the static operating pressure is less than 20Mpa. Sometimes it is also used for dynamics, when the operating pressure is less than 5Mpa, and semiconductor vacuum sealing. The available standards are: cross-section diameter is about 0.35 ~ 12mm and inner diameter can reach 1000mm and above. Compatibility of sealing materials and hydraulic oil (liquid): One of the origins of particle contamination of hydraulic oil is the "debris" or "wear debris" that occurs when seal materials are incompatible with hydraulic oil. The "debris" that occurred when the seal was damaged due to "swelling" or the unlinked inorganic matter and filling reinforcing materials that were "extracted" caused the seal to be damaged and failed, which together caused pollution to the oil and formed hydraulic pressure. Oil degeneration causes failure.
O ring 
