No. Code and number Example ① Seal type code (*)
Because of the higher temperature resistance of FKM, this material is also chosen for applications where higher speeds play a role, which raise the temperature at the sealing lip considerably. Usually, using FKM will result in a longer life than using NBR. This compensates the higher price of FKM compared to NBR, as an FKM does not have to be replaced as frequently. The low temperature resistance of standard FKM is limited to -15 ˚C.
What Is Oil Seal?

Rotary Wheel Of Auto Parts
A piston oil seal, also known as a piston seal ring, is a critical component in an internal combustion engine. It plays a crucial role in preventing oil leakage from the piston and ensuring efficient engine operation.
Oil leak: the most frequent failure of the oil seal
1. The structure of the oil seal is simple and easy to manufacture. Simple oil seals can be molded once. Even the most complex oil seals are not complicated to manufacture. Metal frame oil seals can also be composed of metal and rubber required oil seals only by stamping, bonding, inlaying, molding and other processes.