O-Rings are round rubber washers that are placed around the valve stem in order to create a seal, preventing leaking from occurring and providing an excellent resistance to vibration. The listed size is referenced from AS568 dimensions, which is the Aerospace Size Standard for O-rings from the Society of Automotive Engineers.
Fluorocarbon (Viton) Specs:
- ASTM D 1418 Designations: FKM, Viton
- ASTM D 2000, SAE J200 Type/Class: HK
- General Temperature Range: -15 to +400 Degrees (F)
FKM Performs Well In:
- Acids
- Aircraft engine applications
- Gasoline (alcohol blends)
- Hard vacuum applications
- Low outgassing applications
- Petroleum products
- Silicon fluids & greases
- Solvents
FKM Does Not Perform Well In:
- Amines
- Hot chlorosulfonic acid
- Hot hydrofluoric acid
- Hydrocarbons (nitro)
- Ketones
- Low molecular weight esters & ethers
- Fireproof hydraulic fluids (e.g. Skydrol)
