Technical Information
'O' Ring Material - Selection Guide
 
The appropriate selection of 'O' Ring material is important. Failure to select the correct material may lead to a shortened service life or, in an
extreme case, seal failure.
   
The following table is offered as a guide only, the information is not intended to be comprehensive. Operating conditions, temperature and fluid
combinations should be taken into account when selecting the material. For specific application advice please consult the factory.
 
 
'O' Ring 'O' Ring Temperature Application  
Material Material Range    
Code     Recommended for: NOT Recommended for:
'N' Nitrlle
(Buna N)
-4°C to + 135°C Mineral Based Hydraulic Oils & Greases
Engine Oils SAE 10 to 50 & Multigrades
Pneumatics
Cold Water
Silicone Oils & Greases
Ethytene Glycol Based Fluids (Anti-Freeze)
Di-Ester Based Lubricants
Gasoline
Nitrous Oxide
Brake Fluid
Phosphate Ester Hydraulic Fluids
Ketones (Acetone)
'V' Flurocarbon -25°C to + 250°C Mineral Based Hydraulic Oils & Greases
Engine Oils SAE 10 to 50 & Multi-Grades
Pneumatics
Di-Ester Based Lubricants
Phosphate Ester Hydraulic Fluids
Silicate Ester Base Lubricants
Silicone Oils & Greases
Gasoline
Aviation Fuels
High Temperature Air
Brake Fluid
Ketones (Acetone)
'EP' Ethylene
Propylene
-54°C to + 135°C Brake Fluid
Water (Hot & Cold)
Phosphate Ester Hydraulic Fluids
Methanol
Nitromethane
Nitrous Oxide
Ketones (Acetone)
Petroleum Oils
Di-Ester Base Lubricants
 
Pressure Units Cross Reference Chart
 
 
 
lbs/in² STD Ft. Hd.     Metres in. Hg. mm Hg.     Millibar  
  atms. H20 in. H20 kg/cm² H20 at 20°C at 20°C cm Hg. bar (mb) kPa
  at 20°C                    
1 0.068 2.310 27.720 0.70 0.703 2.043 51.884 5.188 0.069 68.947 6.895
14.696 1 33.959 407.513 1.033 10.351 30.019 762.483 76.248 1.013 1013.25 101.325
0.433 0.029 1 12.000 0.030 0.304 0.884 22.453 2.245 0.030 29.837 2.984
0.036 0.003 0.083 1 0.003 0.025 0.074 1.871 0.187 0.030 2.486 0.249
14.223 0.968 32.867 394.408 1 10.018 29.054 737.962 73.796 0.981 980.665 98.066
1.422 0.097 3.287 39.370 0.099 1 2.905 73.796 7.379 0.098 98.066 9.807
0.489 0.033 1.131 13.575 0.034 0.344 1 25.400 2.540 0.034 33.753 3.375
0.019 0.001 0.045 0.534 0.001 0.013 0.039 1 0.100 0.001 1.333 0.133
0.193 0.013 0.445 5.340 0.014 0.136 0.395 10.326 1 0.013 13.333 1.328
14.503 0.987 33.514 402.164 1.020 10.196 29.626 752.472 75.251 1 1000.0 100.00
0.014 0.001 0.033 0.402 0.001 0.010 0.030 0.753 0.075 0.001 1 0.100
0.145 0.010 0.335 4.021 0.010 0.102 0.296 7.525 0.753 0.010 10.000 1
 
 
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