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Silicone (VMQ, Q, MQ, PVMQ)
Silicone rubber is generally non-reactive, stable, and resistant to extreme environments and temperatures from -50°C to +232°C while still maintaining its useful properties. Silicone compounds are very clean and are used in many food and medical applications.
Ethylene Propylene Rubber (EPDM)
EPDM has a temperature range of -50°C to +120°/150°C, depending on the curing system. It has great resistance to heat, water and steam, alkali, mild acidic and oxygenated solvents, ozone, and sunlight. Also resistant to alcohols, glycol engine coolants and SKY-DROL (phosphate ester hydraulic fluid).
Buna-N/Nitrile (NBR)
Due to its excellent resistance to petroleum products, and its ability to be compounded for service over a temperature range of -35°C to +120°C, nitrile is the most widely used elastomer in the seal industry today.
Viton® (FKM)
The most specified material with temperature resistance to 200°C as well as resistant to aggressive fuels, acids, and other chemicals. Excellent compression set resistance Used in the semiconductor, chemical processing industries, and many others.
Neoprene (CR)
It is moderately resistant to both petroleum oils and weather (ozone, UV, oxygen). Neoprene is classified as a general purpose elastomer which has relatively low compression set, good resilience and abrasion, and is flex cracking resistant with a temperature range of -30°F to 212°F. It is used extensively for sealing refrigeration fluids due to its excellence resistance to Freon® and ammonia.
Fluorosilicone (FVMQ)
Fluorosilicone elastomers combine the good high and low temperature properties of silicone with basic fuel and oil resistance. The primary uses of fluorosilicone materials are in fuel systems at temperatures up to +177°C and in applications where the dry-heat resistance of silicone is required but the material may be exposed to petroleum oils and/or hydrocarbon fuels. Fluorosilicone has limitations at higher temperatures due to degradation of certain fluids, producing acids which attack the fluorosilicone elastomer.
Specialty Approvals include:
NSF Standard 61
USP Class VI
FDA White List