Material
/ temperature
|
property |
Recommended Use |
Not Recommended
For |
Nitrile
(Buna-N)
-40 C to +135 C
Nitrile (Low-Temp)
-65 C to +120 C
|
Good resistance to petroleum
based on oils and fuels, silicone greases, hydraulic
fluids, water and alcohols. It has a good balance
of working properties such as low compression set,
high tensile strength, high abrasion resistance,
and combined with a low cost |
Silicone Greases / Oils
Water
Petroleum Oils / Fuels
Ethylene Glycol Fluids |
Keytones (MEK)
Halogenated Hydrocarbons
Auto / Aircraft Brake Fluids
Strong Acids
Sunlight, Ozone, Weathering phosphate esters, and
H2S
|
| Viton®
(Fluorocarbon ) -30 C to +204
C |
Featuring excellent resistance
to petroleum products and solvents, with good high
temperature and low compression set characteristics.
For use with wide chemical exposure situations,
and with low gas permeability, it is also suited
for hard vacuum service.
|
Most Acids / Chemicals
Halogenated Hydrocarbons
Di-Ester Lubricants
Petroleum Oils / Fuels
Silicone Oils / Greases transmission fluid
|
Keytones (MEK)
Auto / Aircraft Brake Fluids
Amines (Ammonia) H2S
Acetone, Skydrol, Ethyl Accetate
Hot Water and Steam
Low Molecular Esters and Ethers |
Aflas
-30 C to +204 C
*reg. TM Asahi Glass Co. |
Aflas is a unique fluoroelastomer
resistant to petroleum oils, steam, hydrogen sulfide
and amine corrosion inhibitors. This compound is
generally used for sour gas oil field services. |
petroleum oils, H2S, steam |
acetone, lacquers |
EPDM (Ethylene
Propylene)
-54 C to +150 C
|
Ethylene Propylene has excellent
ozone and chemical resistance characteristics. Generally
used in automotive brake systems.
|
brake fluids, refrigerants, Sunlight,
Ozone, Weathering
Hot Water and Steam
Auto / Aircraft Brake Fluids |
Petroleum Oils,
Fuels, diester lubricants |
FVMQ (Fluorosilicone)
-62 C to +240 C |
Fluorosilicone combines the good
high and low temperature stability of silicone with
the fuel, oil, and solvent resistance of fluorocarbon
|
Jet Fuel, Dry Heat,
Wide Temperature Range
,Petroleum Oils,
Clorinated Solvents, and gasoline |
Keytones (MEK)
Phosphate Esters
Some Acids
Auto / Aircraft Brake Fluids
Amines (Ammonia), acetone, ethyl acetate
|
Highly
Saturated Nitrile (HSN, HNBR)
-26 C to +160 C |
A nitrile elastomer with excellent
resistance to petroleum oils, and sour gas. With
the extended temperature range, HSN is becoming
a preferred compound in the oil patch |
petroleum oils, H2S, CO2 |
brake fluid |
Neoprene
-40 C to +135 C
|
Due to its excellent resistance
to freon and ammonia, Neoprene is widely accepted
as a preferred elastomer for refrigeration seals
|
refrigerants, alcohol, ozone,
Ammonia,
Some Petrolium Oils,
Dilute Acids,
Silicone and ester Lubricants |
petroleum oils, Toluene, Keytones
(MEK)
Gasoline, Auto / Aircraft Brake Fluids |
Polyurethane
-50 C to +105 C
|
An excellent elastomer with high
abrasion resistance characteristics and high tensile
strength. Used in high pressure hydraulic systems
where highly stressed parts are subject to wear.
|
petroleum oils,
hydraulic oils, Some Hydrocarbon Fuels,
Oxygen / Ozone, Drive Belts
|
Keytones (MEK)
Acids
Auto / Aircraft Brake Fluids
Chlorinated Hydrocarbons
Water |
| Silicone
(VMQ) -65 C to +260 C |
Silicone elastomer is resistant
to high, dry heat, in primarily static applications.
It has low compression set characteristics and a
wide temperature range.
|
Dry Heat, alcohol, vegetable
oil, Wide TemperatureRange,
Sunlight, Ozone, Weathering
Odorless and Non-Toxic |
Keytones (MEK)
Acids
Silicone Oils
Brake Fluids, petroleum oils & fuels
|
Teflon
(PTFE)
-40 C to +240 C
|
Excellent chemical registant,
Teflon is a tough, chemically inert elastomer possessing
an incredible working range. For static and slow
intermittent dynamic situations. Teflon is hampered
only by it's poor memory at low temperature |
The most chemical Resistance,
Fuel Resistance,
Low Coefficient of Friction |
Non-Elastic |
FFPM/FFKM
(Chemraz® / Kalrez® / Simriz®
Perfluoroelastomer) ~ +323
C |
Excellent chemical registance,
Excellent Temperature resistance elastomer Various
Compounds
Designed for Specific Applications |
High Temperature Resistance,
Excellent Chemical, Resistance,
Low Out Gassing,
Chlorine Wet/Dry,
Petroleum Oil,
Chlorinated Hydrocarbons |
Molten metals
Gaseous Alkali Metals
Halogenated Freons/Fluids
Uranium Hexafluoride |
| FEPV/PFAV
(Teflon Encapsulated O-Ring) -40
C to +260 C |
Covered with Teflon Tube
Usually Silicone or Viton® Good Wear Resistance
Good Permeation Resistance |
The most chemical Resistance,
Fuel Resistance,
Low Coefficient of Friction, Heat Resistance |
Depends
on O-Ring Core |
| Graphite
(Pure, Engineered) -240 C to
+800 C |
Excellent chemical stability
and wide range of temperature extreme low &
high |
Most chemical resistance, Excellent
heat resistance |
|
