Hayward® O-Ring Materials

The O-rings for Hayward® are available in the two materials shown below; their descriptions are copied from Hayward's Engineering Product Guide.  If you are unsure which material is most compatible with your application, please send us an inquiry and we will assist you with selection.

EPDM (Ethylene Propylene Diene Monomer)
EPDM rubber is an elastomer prepared from ethylene and propylene compounds. It has been used continuously to a temperature of 300°F. The material is recommended for water, steam, dilute acids, dilute alkalis and alcohols. EPDM is not recommended for petroleum oils or diester lubricants.

FPM or FKM (Fluorocarbon Rubber)
The fluorocarbon elastomers have a maximum service temperature of 400°F. Fluorocarbon materials are recommended for petroleum oils, diester base lubricants, silicate fluids and greases, halogenated hydrocarbons, acids and vacuum environments. Fluorocarbon materials are not recommended for ketones, amines, anhydrous ammonia, hot hydrofluoric or chlorosulfonic acids.