O-rings are an essential part to process equipment and ensuring replacements are an exact match and made of the correct material for the job is very important. Use the reference chart below to help identify o-ring replacements or to ensure the o-ring material is correct for your application.
Download complete O-Ring Selection Guide - SP-001
O-Ring Material | Identification | Temperature Limits | Recommended Uses
|
Nitrile (BUNA-N) 
| Compound Color:
BLACK OR GREY
Color Code:
YELLOW
FDA APPROVED | +250°F to -30°F | - General purpose sealing
- Petroleum oils
- Cold water
|
|
EPDM 
| Compound Color:
BLACK OR PURPLE
Color Code:
GREEN
FDA APPROVED | +250°F to -70°F | - Steam to 400°F
- Ketones (MEK, acetone)
- Alcohols
|
|
SILICONE 
| Compound Color:
ORANGE
Color Code:
BLACK
FDA APPROVED | +450°F to -65°F | - Dry heat
- High aniline point oils
|
|
FKM (Viton™) 
| Compound Color:
STANDARD-RUST
Compound Color:
NON-STANDARD BLACK
Color Code: WHITE
FDA APPROVED | +400°F to -15°F | |
|
FFKM (Kalrez®) 
| Compound Color:
BLACK
Color Code:
NONE | +600°F to -10°F | - High temps
- Excellent chemical resistance
|
|
NEOPRENE 
| Compound Color:
BLACK
Color Code:
RED | +250°F to -45°F | - Refrigerants (freon, ammonia)
- Mild acids
- Water
|
|
PTFE ENCAPSULATED,
TEFLON™ ENCAPSULATIONS 
| Compound Color:
TRANSLUCENT
Color Code:
ORANGE OR BLACK | +400°F to -15°F | - Excellent chemical resistance
- Static sealing applications
|
|
