21.95 X 1.78 EP70

Ethylene Propylene Oring

EPM, EPDM

Shore A Description:

The hardness of rubber compounds is measured by the Shore A durometer; the higher the durometer, the harder the compound. Softer compounds stretch easier and seal better on rough surfaces. Harder compounds offer greater abrasion resistance and resistance to extrusion.

60 Shore A is softer than 70

70 Shore A is the standard

90 Short A is very stiff

Specs:

Excellent resistance to Skydrol and other phosphate ester fluids at high temperatures. Also exhibits excellent resistance to automotive brake fluids and steam.

Material:

EPM (Ethylene Propylene)

Standard Service Temperature: -65°F - +300°F

Application:

Automotive Brake Fluids, Water/Hot Water, Steam (to 400°F), Silicone Fluids, Some Acids (Dilute), Ketones, Phosphate Esters such as Skydrol

Not Compatible With: Petroleum Fluids, Diester Lubricants