Composite Cuts Heat in Magnetic Pumps

DN Staff

September 10, 2009

1 Min Read
Composite Cuts Heat in Magnetic Pumps

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Talk about a replacement for metals. Carbon-reinforced Xycomp thermoplastic composites have 80 percent lower density than steel, 60 percent less than titanium, and 40 percent less than aluminum. They have higher continuous service temperature capabilities than most plastics and better toughness than most thermosets.

They are used as containment shells in magnetic-driven pumpsand mixers to form a closed system that seals off the fluid contact areas ofthe pump/mixer. This seal-less design replaced the traditional style ofpackings and complex mechanical seals, with their associated piping, valves,cooling units and other equipment, and offers a reduction in maintenance.Traditional shell materials such as Hastelloy or carbon-reinforced epoxy aresaid to suffer from significant energy losses through eddy currents.

The reduction in eddy current using Xycomp shells means thereis no heat generation and a stable fluid temperature, boosting the safety levelin hydrocarbon applications where pumps are operating with media close to theboiling point. Xycomp composites can be made from polyphenylene sulfide (PPS),polyether imide (PEI),poly(aryletheretherketone) (PEEK), or poly(ether ketone ketone) (PEKK). PEKK issaid to be the only polymer that can withstand continuous high temperatures ofaround 260C - its melting point is 360C.

Xycomp components are molded through the proprietary Techna3process, which produces complex tubular shapes with flanges, reinforcement ribsand closed ends.

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