Before installing the oil seal, check the seal carefully for damage. Make sure there are no cuts or tears around the seal lip, which is the two layers inside the oil seal.
Another thing to consider is the outer diameter of the oil seal. Any damage detected prior to installation will make it impossible to use further.
2. Temperature: Just like pressure, it is very important to choose the right seal that can withstand extreme heat or cold temperatures, depending on the operating environment of your application.