CR vs FKM Diaphragm Filter Plates: How to Choose (Temperature & Chemical Guide)

Material	Key Advantages	Recommended For
Chloroprene Rubber (CR)	Excellent chemical resistance to acids, bases, salts; good weather/ozone resistance; suitable for lower temperature ranges.	Handling strong acids, strong bases, salts, and low-temperature media.
Fluoroelastomer (FKM/Viton®)	Outstanding resistance to high temperatures, oils, fuels, and many aggressive chemicals.	High-temperature media and highly aggressive organic solvents.

Selection Criteria:

For High-Temperature Media: Fluoroelastomer (FKM) is the preferred choice due to its superior thermal stability.

For Low-Temperature or Highly Weather-Exposed Applications: Chloroprene Rubber (CR) offers a reliable and often more cost-effective solution.