Coupling O-ring materials

Designation Trade name ISO 1629 ASTM
1418
Temp_Range (Celsius) Field of Application
Nitrile
Butadiene
Rubber
Buna N®
Europrene N®
Hycar®
Nipol N®
Perbunan N®
 NBR  NBR  -55 to 110 Standard material for hydraulics and pneumatics. Mineral oil-based hydralic fluids, animal and vegetable
oils and fats. Flame retardant liquids. Aliphatic hydrocarbons (prophane, butane, petrol). Silicone oils
and greases. Water up to 80Cº. Bio oils made from synthetic esters and vegetable oils
Ethylene-
Propylene-Diene
Rubber
Dutral
Keltan®
Vistalon®
Buna AP®
 EPDM  EPDM  -55 to 120 Hot water, vapour, brake fluids, detergents. Alcohols, ketons, engine coolants, flame retardant phosphate-based liquids, organic and inorganic acids and bases. Not resistent to mineral oils
Fluoroelastomer Fluorel®
Technoflon®
Viton®
 FPM  FKM  -20 to 200 Mineral oil and greases. Aliphatic, aromatic and chlorinated hydrocarbons, petrol, 99 octan petrol, diesel
fuels, flame retardant phosphatebased liquids. Silicone oils and greases acids, Iyes
Fluorosilicone
Elastomer
-  MFQ  FVMQ  -60 to 200  Mineral oils, fuels. lubricant on Di-Ester basis, hot air.
Silicone Silastic®
Silopren®
 MVQ VMQ  -60 to 200  Mineral oils, fuels. lubricant on Di-Ester basis, hot air.
Hydrogenated
Nitrile-
Butadiene
Rubber
Therban®
Tornac®
Zetpol®
 HNBR** HNBR**  -35 to 120 Mineral oil-based hydralic fluids, animal and vegetable fats, aliphatic hydrocarbons, diesel fuels, ozone, sour
gas, dilute acids and bases Mineral oil-based hydralic fluids, animal and vegetable fats, aliphatic hydrocarbons, diesel fuels, ozone, sour gas, dilute acids and bases
Butyl Rubber Exxon Butyl®
Polysar Butyl®
 IIR  IIR  -55 to 100 Butyl is a copolymer of isobutylene and isoprene. It has largely been replaced by ethylene propylene for
O-ring usage. Butyl is resistant to the same fluid types as ethylenepropylene and except for resistance to gas permeation, it is somewhat inferior to ethylene-propylene for O-ring service. Excellent weather resistance,
and gas permeation resistance. Poor petroleum oil and fuel resistance.
Perfluorinated
Elastomer
CHEMRAZ®
Kalrez®
PERLAST®
 FFPM  FFPM  -40 to 260 Best chemical resistance of all elastomers, including organic acids, f.i. acetic acid, benzoic acid, formic acid
Chloroprene
Rubber
Baypren®
Neoprene®
 CR  CR  -40 to 120 Resistant to refrigerants, ammonia, carbon dioxide, freon(R12,R13,R21,R22,R113-R115), silicone oils,
water, oxygen(low-pres.), bleaches, coustic soda, alcohols, chlorine, ozone, castor oil and veg. oils. Low
resistance to mineral oils!
Polyester / Polyether
Urethane Rubber
Adiprene®
Urepan®
Vulkollan®
Desmopan®
AU
EU
PUR
AU
EU
 -40 to 100

Mineral oils and greases, oxygen, ozone. HFA and HFB fluids, air.

Not resistant in esters, aliphatic, aromatic and chlorinated hydrocarbons, concentrated acids and lyes, water
above +50ºC.

Polytetrafluoroethylene Teflon® PTFE PTFE  -200 to 260 PTFE is used wherever the chemical and thermal resistance of the normal elastomer is no longer sufficient.
These are primarily applications in the chemical industry, foodstuffs industry, pharmaceuticals and medical
technology. PTFE are used only as static seals, e.g. on flange connections, on covers, .etc.
Fluorinated Ethylene
Propylene
Teflon FEP® FEP/MVQ
FEP/FPM
FEP/VMQ
FEP/FKM
-60 to 200
-20 to 200
FEP is used wherever the chemical and thermal resistance of the normal elastomer is no longer sufficient.
These are primarily applications in the chemical industry, foodstuffs industry, pharmaceuticals and medical technology.
Perflouralkoxy Teflon PFA® PFA/MVQ
FEP/FPM
FEP/VMQ
FEP/FKM
-60 250
-20 250
PFA is used wherever the chemical and thermal resistance of the normal elastomer is no longer sufficient.
These are primarily applications in the chemical industry, foodstuffs industry, pharmaceuticals and medical
technology.
Tetrafluoroethylene-
Propylene
Copolymer Elastomer
Aflas®  -- TFE / P**  -25 to 200 Mineral oils and greases, brake fluids, fuels, alcohols, heat transfer media, oils. amines, acids, bases