Oilfield Elastomer Selection Guide (For O-Rings & Seals) TEMP > 2500 F? YES NO SELECT NITRILEH2S > 4%? YES NO ALL NO (70 DUROMETER)AMINES AT > 2000 F? YES NO PRESSURES < 1000 PSIACIDS? YES NOBROMIDES (ZINC/SODIUM)? YES NO

TEMP > 3000 F? YES NOH2S > 4%? YES NO SELECT PEROXIDE CURED NITRILEAMINES AT > 2000 F? YES NO ALL NO (90 DUROMETER)ACIDS? YES NO PRESSURES < 10,000 PSIBROMIDES (ZINC/SODIUM)? YES NO **HNBR can be used to get up to

3250 F IN CERTAIN SEAL GEOMETRIES

TEMP > 3500 F? YES NOH2S > 8% AT < 3000 F? YES NO SELECT VITONAMINES AT > 2000 F? YES NO ALL NO PRESSURES < 1000 PSIBRINES PH > 10? YES NO (75 DUROMETER)METHANOL? YES NO PRESSURES < 10,000 PSISTEAM/WATER AT > 2500 F? YES NO (90 DUROMETER)

PRESSURES < 15,000 PSI(95 DUROMETER)

TEMP > 4000 F? YES NOH2S > 20% AT < 3000 F? YES NO SELECT AFLASH2S > 7% AT > 3000 F? YES NO ALL NOHIGH AROMATICS? YES NOACIDS AT > 2000 F? YES NO

TEMP > 4250 F? YES NO ALL NOSELECT FFKM

*** Pressure ratings are based on .002 maximum extrusion gap/per diametrical inch*** It is recommended to use anti extrusion devices where high temperature, high pressure, and large extrusion gaps exist*** Where it is possible, the largest cross section o-ring should be used*** The above information is presented to be used as an aid in the proper selection of o-ring materials and does not warrantor guarantee performance

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