ELASTOMERS vs POLYMERS
WHAT TYPE OF ELASTOMERS ARE USED IN BALL VALVES?
Typical materials are NBR, EPDM, FKM (Viton) and PTFE (Teflon). The material choice depends strongly on
the chemical properties and the temperature of the medium. The right choice is of utmost importance to
guarantee a long life span and optimal valve performance. Today’s extreme temperatures in light hydrocarbons,
elastomers are challenged in dynamic applications during extreme temperature swings. Elastomers are
elastic materials with high flexibility and low strength molecular bonds (like rubber).
WHAT TYPE OF POLYMERS ARE USED IN BALL VALVES?
The most utilized grades are PTFE, RPTFE, PCTFE, FEP, PFA, POLYAMIDE and POLYETHER KETONE. The most
utilized and applicable grade here is PTFE or RPTFE which is in the Fluoropolymer family. Both Fluoropolymers and thermoplastics are basically inert
to most chemicals and are developed for strength, stability, and performance. Polymer fibers consist of polymer chains that have stronger molecular
bonds than elastomers. Fibers are more rigid and less elastic than elastomers and can be composed of both natural and synthetic materials.
The chart below provides information about a few elastomers and polymers materials commonly used, although, other materials are
available. Once you have narrowed your search, review of specific physical and chemical performance characteristics can help identify
the most appropriate material for use.
CONTACT PORT PLASTICS FOR ALL YOUR NEEDS IN TERMS OF POLYMERS FOR THE ENERGY MARKET.
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