Crown Products, Inc.

O-Ring Materials

-67 F
257 F
Nitrile (Buna-N)
-67°F to 257°F (-55°C to 125°C) Most commonly used O-Ring material type. Resistant to many hydrocarbon fluids and petroleum oils, greases, and hydraulic fluids. Resistant to water, alcohols and many chemicals. Not suitable for ketones, esters, aldehydes and chlorinated or nitro-hydrocarbons.
-175 F
482 F
-175°F to 482°F (-115°C to 250°C) Suitable for use in air, high aniline point petroleum oils, ozone and many oxidizing chemicals. Not recommended for most solvents, low aniline point petroleum oils, or concentrated acids.
-67 F
302 F
-67°F to 302°F (-55°C to 150°C) Resistant to many chemicals and acids as well as ozone. Moderate resistance to petroleum oils and good resistance to commonly used refrigeration fluids. Not resistant to strong oxidizing acids, ketones, esters or aromatic or chlorinated hydrocarbons.
-300 F
450 F
Teflon® (TFE)
-300°F to 450°F (-149°C to 232°C) For use where total solvent to chemical resistance, or extremely high or low temperature resistance, is desired in installations similar to those in which elastomeric materials are customarily used, with the exception of reciprocation motion. Typical applications: gaskets, jam seals, valve discs or seats, and lubricant or weather seals on slow rotary motion.
-40 F
437 F
-40°F to 437°F (-40°C to 225°C) Resistant to aliphatic, aromatic and halogenated hydrocarbons as well as acids and animal and vegetable oils. Not recommended for ketones, low molecular weight esters or nitro-hydrocarbons.
-67 F
320 F
Ethylene-Propylene (EPR-EPDM)
-67°F to 320°F (-55°C to 150°C) Resistant to animal and vegetable oils, ketones, ozone, and oxidizing chemicals. Not resistant to petroleum oils, fluids or fuels, or aromatic hydrocarbons.
-67 F
212 F
Polyurethane (Urethane)
-67°F to 212°F (-55°C to 100°C) Resistant to ozone, fats, petroleum oils and fluids. Outstanding abrasion resistance. Not suitable for concentrated acids or ketones, esters or chlorinated hydrocarbons.