#228 2 1/4″ ID x 2 1/2″ D x 1/8″ CS Buna N (Nitrile) 70 Durometer

Description

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.

Nitrile (Buna N) Specs:

ASTM D 1418 Designations: NBR, XNBR

ASTM D 2000, SAE J200 Type/Class: BF, BG, BK, CH

General Temperature Range: -40 to +225 F

NBR Performs Well In:

Petroleum oils & fuels

Silicon oils & greases

Ethylene glycol

Dilute acids

Water (Below 212 F)

NBR Does Not Perform Well In:

Aromatic hydrocarbons (toluene, xylene, benzene)

Automotive brake fluid

Halogen derivatives (carbon tetrachloride, trichloroethylene)

Ketones (acetone, MEK)

Phosphate ester hydraulic fluids (Skydrol, Pydraul)

Strong acids