NBR material good or FKM material good?

The choice between NBR (Nitrile Butadiene Rubber) and FKM (Fluoroelastomer) for a bonded seal depends on the specific requirements of your application. Here are some key considerations for each material:

NBR (Nitrile Butadiene Rubber):

Compatibility: NBR is generally compatible with a wide range of oils, fuels, and hydraulic fluids. It offers good resistance to petroleum-based fluids, making it suitable for applications in the automotive, oil and gas, and industrial sectors.

Cost-Effectiveness: NBR is typically more cost-effective compared to FKM, making it a popular choice for applications where budget constraints are a concern.

Temperature Range: NBR has a limited temperature resistance compared to FKM. It performs well in moderate temperature ranges but may not be suitable for high-temperature applications.

FKM (Fluoroelastomer):

High-Temperature Resistance: FKM exhibits excellent resistance to high temperatures, making it suitable for applications where elevated temperatures are involved, such as in the aerospace, automotive, and chemical industries.

Chemical Resistance: FKM provides superior resistance to a wide range of chemicals, including fuels, acids, and solvents. It is often chosen for applications that require resistance to aggressive chemicals.

Performance in Extreme Environments: FKM performs well in harsh environments, including exposure to ozone, UV radiation, and weathering. It offers excellent durability and long service life.

Ultimately, the choice between NBR and FKM depends on factors such as the specific fluids or chemicals involved, temperature requirements, cost considerations, and the overall performance demands of your application. It's advisable to consult with seal manufacturers or industry experts who can provide guidance based on their knowledge and experience with these materials, considering your specific application requirements