The following data has been compiled from generally available sources and should not be relied upon without consulting and following the specific recommendations of the manufacturer regarding particular coupling materials.


  • Ratings given are based at 70°F. Chemical compatibility varies greatly with temperature. For applications at temperatures other than 70°F, contact the Factory for recommendations.
  • Gasket / seal materials are not necessarily listed in order of preference.
  • Chemical resistance of a material does not necessarily indicate the suitability of a fitting in a given application due to variables such as improper clamp and coupling application, special hose construction, gasket material, etc.
Metal Non-Metal Gasket/Seal Material
(1) Excellent (A) Acceptable (T) PTFE
(2) Good (X) Not Recommended (V) FKM
(3) Fair (-) Contact Factory (E) EPDM, EPR
(X) Not Recommended (N) Neoprene
(-) Contact Factory (B) Buna N

Special caution should be taken when handling hazardous materials.