|
Nitrile (Buna-N or NBR)
Compounds of this material are the most common industrial compounds.
| Application Data |
Shore A
+/- 5° |
Temp
°C |
Remarks |
| Hydraulic
and lubricating oils, animal and vegetable oils, acetylene,
alcohols, water, air, alcohol fuels and many other fluids. |
40 |
-40/+110 |
Only for static use |
| 50 |
|
|
| 60 |
|
|
| 70 |
|
Compound mostly asked for.
SAE 120r Class J |
| 80 |
|
Graphited compound for rotating shafts |
| 90 |
|
Widely used |
| LPG gases,
butane, propane, acetylene, aromatic and non-aromatic fuels,
petrol, kerosene, diesel oils and fuels. |
70 |
-40/+100 |
Approved by Underwriters Lab. |
| 70 |
-35/+100 |
SAE 120r Class II |
| 70 |
-40/+120 |
SAE 120r Class I |
Fluorocarbon (VITON®)
| Application Data |
Shore A
+/- 5° |
Temp
°C |
Remarks |
| High
quality compound for high temperatures. Synthetic and hydraulic
fluids; a wide range of chemicals, heavy oxidating acids (in
combination with medium temperatures), many alkalis and acids
and hot air. Exceptional in vacuum application. |
60 |
-20/+200 |
|
| 70 |
|
|
| 75 |
|
Special for Hot Air.
MIL-R-25897 Class I |
| 90 |
|
Special for Hot Air.
MIL-R-25897 Class II |
Perfluor Elastomer (KALREZ®)
| Application Data |
Shore A
+/- 5° |
Temp
°C |
Remarks |
| Superior
quality compound for high temperatures and most chemicals. The compound
combines chemical properties of PTFE and mechanical properties of
VITON. For solvents, ketones, esters, ethers, inorganic and organic
acids and lyes, highly oxidizing agents, chlorine and compounds of
chlorine, fuels, hydraulic fluids, thermal fluids, steam. For maximum
resistance to high temperatures. In comparison with compound 1050
less suitable for acid or wet media. |
80 |
-20/+260 |
Fluoridized solvents cause a
slight amount of swelling |
| 90 |
-20/+288 |
Ethylene Propylene (EPDM or EP)
| Application Data |
Shore A
+/- 5° |
Temp
°C |
Remarks |
| Chemically
resistant. Fire resistant to hydraulic fluids (skydrol, pydraul, lindol,
celube150, phosphate esters), pure aniline, fire extinguisher fluid,
acids. Resistant to heated water and steam. |
50 |
-55/+150 |
Not resistant to mineral oils. Ep compounds
have now replaced butyl compounds but these can be supplied
if required. |
| 60 |
|
| 70 |
|
| 80 |
|
Silicone
Silicone O-Rings are made from existing standard moulds. Due to
contraction of these materials, a minus tolerance of 0.2% is acceptable.
| Application Data |
Shore A
+/- 5° |
Temp
°C |
Remarks |
| For
high temperatures, air, oxygen, heated water, etc. For static application
only. Silicone compounds can be used for many chemicals like phosphate
esters, synthetic di-esters, or the silicate-esters, chlorinated silicone-fluids,
alkalis and various acids, concentrated h202. Always check with chemical
compatibility chart before use. |
50 |
-55/+230 |
AMS 3302 |
| 60 |
|
AMS 3303 |
| 70 |
|
AMS 3304 |
| 80 |
|
AMS 3305 |
Fluorosilicone
Fluorosilicone O-Rings are made from existing standard moulds. Due to
contraction of these materials, a minus tolerance of 0.2% is acceptable.
| Application Data |
Shore A
+/- 5° |
Temp
°C |
Remarks |
| Fuels
and lubricants, silicone fluids and lubricants, silicate esters (hydraulic
fluids), diester synthetic lubricants. |
60 |
-68/+230 |
Also oil resistant |
Neoprene (CR)
| Application Data |
Shore A
+/- 5° |
Temp
°C |
Remarks |
| Resistant
to ozone and sunlight. Reasonable oil resistance. Special for refrigeration
e.g. freon 12 and 22. |
60 |
-45/+100 |
|
| 70 |
|
| 80 |
|
| 90 |
|
Buna-S (SBR)
| Application Data |
Shore A
+/- 5° |
Temp
°C |
Remarks |
| Brake fluid, alcohols, mixtures of alcohol and water. |
60 |
-60/+120 |
SAE 120r Class III |
| 80 |
|
Urethane (Comparable to Vulkollan)
| Application Data |
Shore A
+/- 5° |
Temp
°C |
Remarks |
| Hydraulic and lubricating oils, animal and vegetable oils. |
70 |
-30/+70 |
Wear resistant material. Special hydrolysis resistant compounds are available. |
| 90 |
|
FEP Encapsulated
| Application Data |
Shore A
+/- 5° |
Temp
°C |
Remarks |
| Seamless
FEP jacketed VITON or Silicone O-Rings. Primarily intended for static applications. |
- |
-60/+200 |
Thickness of jacket: 0.25 - 0.50mm |
|