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 It has largely been replaced by ethylene propylene for O-ring usage.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 |
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 |