Buna
Also known as Nitrile or Buna-N, is probably the most common gasket material and it is the standard material for petroleum oils. Buna can stand temperatures to 90°C / 200°F . Buna resists aging very well. Not recommended for bio-diesel in concentrations over B20 (20% bio-diesel). Heating oil applications will require gaskets that carry an agency listing: UL, ETL, Intertek, ULC or CUL. All General Filters Buna-N Gaskets carry an ETL agency listing.
Vellumoid
Vellumoid is a treated cellulose fiber impregnated with protein glue and glycerin binder. It is used for speciality Chemicals. Temperature up to 120°C / 250°F. Not recommended for petroleum oils.
FKM BioGasket
Also known as FKM, Type 1 Fluroelastomer or Viton™ (DuPont Performance Elastomers L.L.C.). The BioGasket™ provides exellent resistance to petroleum oils, inorganic acids, organic acids, fuel hydrocarbons, animal and vegetable oils, mineral oils and solvents. BioGasket™ also has excellent heat resistance, making service temperatures nearing 150°C / 300°F possible. The General Filters BioGasket™ is ETL Listed for all fuel oils and
Bio-Diesel oils up to B100.
